Systems Flashcards

Question

* LOT 201.02 RCS* * * * What is K_eff, RTP, and T_avg when the plant is in MODE 6?

Answer 1

*_Refueling:_* * _Keff:_* * *≤ 0.95** * _RTP:_* * *0%** * _T_avg:_* * *≤ 140 ˚F** * * * Fuel in the Rx vessel w/ vessel closure bolts less than fully tensioned or head removed.

Answer 2

* *SG PORVs** * Manual _AND_ Automatic* * *AFW throttle valves** * Automatic ONLY* * *Rx head vent valves** * Manual ONLY* * * * SG PORVs controlled from MCR _AND_ ASP.

Answer 3

**11,500 lbs - 15,100 lbs** ## Footnote * * * LCO 3.6.2.2 Recirculation Fluid pH Control Applicability: MODES 1 - 4 * * * * Note:* * 6 Baskets are in containment.*

Answer 4

* *Pulser Failure** * *Slave Cycle Input Failure** * Slave receive "Go" signal before last step done* * *Loose circuit card** * * * * Stops Auto/Manual rod motion * Individual Bank rod motion will still work * Sends reduced current signal to affected group movable/stationary grippers * * * * Note:* * Non-Urgent is a loss of 1 of the 6 power supplies and will not affect system operation.*

Answer 5

**600 RPM** * *5500 kW (Continuous)** * 108% (83 days)* * 110% (7 days)* **4.16 kV ± 10%** * * * * Note:* * ESF DGs will restore power to Class 1E buses in 10 secs following a LOOP.*

Answer 6

* _PZR:_* * *68.3 ^gal/_%** * _VCT:_* * *33.9 ^gal/_%** * * * Used to calculate leak rate

Answer 7

**MCC 1G1** **MCC 1G5 (BOP DG)**

Answer 8

**5600 gpm** ## Footnote * * * Ensured by FV-7022

Answer 9

* _T_avg:_* * *OT∆T** * *OP∆T** * *FW Isolation** * P-4 w/ T_avg - Low (574 ˚F)* * *P-12** * \< 563 ˚F [2/4] Blocks steam dumps* * _Auctioneered High T_avg:_* * *Rod Control** * Indication on CP005 is Auctioneered Low T_avg* * *Steam Dumps** * *PZR Level Control** * _Auctioneered Low T_avg:_* * *C-17** * _Auctioneered High ∆T:_* * *Rod Insertion Limit** * * * 3 in H_L (120˚ apart for laminar flow concerns) and 1 in C_L per loop. Also has 3 fast response RTDs in C_L per loop. * * * * Note:* * 3 HL RTDs are averaged together to give signal. If 1 fails the system will automatically kick it out.*

Answer 10

**SI Signal** **_AND_** * *RWST Level - Low 2 (≤ 75,000 gal) [1/1]** * Each lvl switch provides signal for it's train only* * * * Closes HHSI AND LHSI pump mini-flow valves. When ≥ 1 valve for each pump closed: * Opens containment sump → SI suction header Isolation valve. RWST → SI suction header isolation valve must be manually closed by operator. (CP001) * * * * Note:* * Reset and RWST lvl indication are located on CP001*

Answer 11

**± 4 Steps**

Answer 12

* _Normal:_* * *Primary Sample Drains** * 100 gpd* * *MAB Gravity Drains** * Filters / Demins* * _Alternate:_* * *RCDT** * *Containment Normal Sump** * * * WHT should only be going up ≈ 100 gpd.

Answer 13

**CR/EAB HVAC (RT-8033/8034)** **SGBD (RT-8022 - 8025)** **MSL (RT-8046 - 8049)** **Unit Vent (RT-8010A/B)** **Containment Atmosphere (RT-8011)** **Containment Purge (RT-8012/8013)** **High Range Containment Atmosphere (RT-8050/8051)** **LWPS Discharge (RT-8038)** * * * FHB HVAC (RT-8035/RT-8036) are on RM-23 but are no longer safety related. * * * * Note:* * "A" Detectors powered from DP001 and "C" Detectors powered from DP002.*

Answer 14

**Battery Chargers 125V/250V** **IA Compressor 14** **Turning gears for MFPs and Main Turbine** **Bearing Oil Lift Pump** **Air Side Seal Oil Pump** * * * Feeds MCC 1G5 BOP, NTF, and Security LTG DGs: 480 VAC / 700 KW / 1800 RPM * * * * Note:* * *BOP DG Fuel Tank will last 60 mins* * *Auto Starts on loss of voltage, comes up to speed and closes breaker in 15 seconds*

Answer 15

**RCS \> 350 ˚F** ## Footnote * * * One train required. * * * *Note: Should be operating at ≥ 150 ˚F but **_must_** be operating at ≥ 350 ˚F.*

Answer 16

**Lowers back to 1500 RPM**

Answer 17

* _Enough Water:_* * *Keep Heaters covered during step load increase of 10%** * * * * _Enough Steam:_* * *Accomodate 50% load reduction w/o reaching PZR LVL - High (92%)** * w/ Rods and Steam Dumps* * *After PZR LVL - High (92%) Rx trip, will not lift safety valves** * * * * _After Rx Trip AND Turbine Trip:_* * *No SI** * *PZR will not empty**

Answer 18

* _MVARS in:_* * *90 MVARs** * Gen Limit is 100 MVARs in* * _MVARS out:_* * *450 MVARs**

Answer 19

* _Loop 1:_* * *PZR Spray** * *SI Train "A" Injection** / **RHR "A" Return** * Same Penetration* * *Normal Charging** * _Loop 2:_* * *SI Train "B" Injection** / **RHR "B" Return** * Same Penetration* * _Loop 3:_* * *SI Train "C" Injection** / **RHR "C" Return** * Same Penetration* * *CVCS Alternate Charging** * _Loop 4:_* * *PZR Spray**

Answer 20

**75 psig** ## Footnote * * * Relieves to the RHT.

Answer 21

* *RCP Seal #2 Leakoff** * *CVCS Valve Stem Leakoffs** * *Flange Leakoff** * *Excess Letdown** * Alternate Path*

Answer 22

* *MODE 5** * *MODE 6 w/ Rx Vessel Head on** ## Footnote * * * LCO 3.5.3.2 ECCS Subsytems - T_avg ≤ 200 ˚F

Answer 23

* *One Recombiner in Service** * ↓ H₂ \< 4%* * Place in-service at 3.5%* * *Purge containment through supplementary containment purge subsystem** * ↓ H₂ \< LCL* * Available once containment pressure ≈ atmospheric* * * * H₂ Recombiner controlled from CP002 Containment Supplementary Purge is controlled from CP022

Answer 24

* *MODE I: SI Signal** * ≥ 4 of 6 slave relays from ESF actuation cabinets giving SI signal* * *MODE II: LOOP** * UV on 4.16 kV bus [2/4]* * *MODE III: SI _AND_ LOOP** * Conditions for MODE I and MODE II exist*

Answer 25

**Coolable Geometry** **Long-Term cooling** **Cladding Oxidation** ≤ 17% the total cladding thickness before oxidation. * *Peak Cladding Temperature** * ≤ 2200 ˚F* * *H₂ Generation** * ≤ 1% the total amount of H₂ produced from all metal surrounding the fuel reacting* * (excludes metal around plenum volume)* * * * DBAs: * LOCA * SLB * Fuel Handling Accident

Answer 26

**RHR Train "B"** **RHR Train "C"** * * * Flow is controlled by throttling the respective train IRC or ORC isolation valve to the RWST * * * *Note: Do not use train that is selected for shutdown cooling.*

Answer 27

**SI** * *RCS Pressure ≥ P-11** * PZR Pressure ≥ 1985 psig [2/3]*

Answer 28

**Opens and Pegs DA Pressure to preloss pressure for _6.3 mins_** *_Open Permissives:_* **NO P-4 NO SI NO P-14** * * * * Maintains FWBP NPSH * Minimizes flashing * * * * Note:* * *DA Pressure compared to Auctioneered High FWBP Temp (P_Sat) (Modulates Valves)* * *DA Pressure / Rate compared to crossover piping pressure (Detects loss of load)*

Answer 29

**≥ 458,000 gallons** **2800 ppm - 3000 ppm** * * * LCO 3.5.5 RWST Applicable: MODES 1 - 4

Answer 30

* _Channel I:_* * *E1A11: E1A1 / E1A2** * _Channel II:_* * *E1D11: E1A4 / E1A1** * _Channel III:_* * *E1B11: E1B1 / E1B2** * _Channel IV:_* * *E1C11: E1C1 / E1C2** * * * 1 2 4 1 1 2 1 2

Answer 31

**1285 psig ± 3%** **1295 psig ± 3%** **1305 psig ± 3%** **1315 psig ± 3%** **1325 psig ± 3%** * * * * Limits SG pressure to 110% (1413.5 psig) of design pressure (1285 psig) during most severe system transient. * Located in IVC 58' * * * *Note: Relieves to atmosphere (Roof)*

Answer 32

**Loss of communications with the MCR** **Loss of audible count rate in the MCR or RCB** **SR NI counts double on both** **SR NI Counts ↑ 5x on 1 SR Detector** **RHR changes by 10 ˚F or 25 ppm boron** * *RCS \< 2800 ppm boron** * Systems that are connected to RCS (Cavity/SFP/RHR)* **Water not clear enough** * *High SFP Temperature** * Plant Curve Book (118 ˚F)* **Load Limits on Refueling Machine/Aux Hoist exceeded** * * * Communications between FHB/RCB control consoles, Refueling Machine, Fuel Handling Machine, and Rx Engineer in MCR required.

Answer 33

* *RHR Pump Discharge Relief (3)** * 600 psig* * *HHSI Pump Discharge Relief (3)** * 1750 psig* * *LHSI Pump Discharge Relief (3)** * 600 psig* * *Safety Valves (3)** * 2485 psig ± 1% [+ 2% / - 3% (LCO 3.4.2.2)]* * *PORVs (2)** * 87.5% on controller / 2335 psig* * *Seal #1 Return Relief (1)** * 150 psig* * *CVCS Letdown Relief (CV-3100)** * 600 psig* * *Head Vents**

Answer 34

* *RCP 1A ONLY** * *_OR_** * *RCP 1D ONLY** * *_OR_** * *RCPs 1B _AND_ 1C**

Answer 35

* _Pressure:_* * *30 psig → 10 psig** * _Flowrate:_* * *3 gpm → 3 gph** * _Suction:_* * *Seal #1** * _Discharge:_* * *RCDT**

Answer 36

**450 RPM** * * * Once SGFPT's speed \> 3300 RPM, cannot lower \< 3300 RPM * * * * Note:* * *Trip Enabled when SGFPT is raised above 600 RPM _OR_ LP GOV demand Signal \> 100%.* * *Trip Blocked when speed \< 400 RPM _AND_ SGFPT tripped.*

Answer 37

**CCW Flow - High (60 gpm)** **CCW Temp - High (187 ˚F)** * * * Protects CCW piping from thermal barrier HX leak. Switches located on CP004. Two in-line backpressure sensing valves provide backup * Start to close at 120 psig * Full close at 150 psig * * * * Note:* * Backpressure sensing valves auto-reset when pressure drops below setpoint*

Answer 38

* _Mode 5:_* * *_ALL_ HHSI pumps inoperable** * *SI not blocked** * _Before Entering MODE 4:_* * *Open ALL HHSI CL injection valves** * *2 trains of LHSI OPERABLE** * _Within 4 hrs of going \> 200 ˚F and before exceeding 225 ˚F:_* * *1 HHSI OPERABLE and 1 HHSI in Standby** * _Before Entering MODE 3 (350 ˚F):_* * *_ALL_ LHSI OPERABLE** * _Within 4 hrs of going \> 350 ˚F and before exceeding 375 ˚F:_* * *_ALL_ HHSI OPERABLE** * _900 psig - 1000 psig:_* * *_ALL_ Acummulators OPERABLE**

Answer 39

**7.0 - 9.5** * * * * _7.0 Basis:_ Retention of Iodine in sumps * _9.5 Basis:_ Chloride stress corrosion cracking of stainless steel * * * * Note:* * Initial pH of ECCS is as low as 4.5.*

Answer 40

**_ALL_ S/D and control banks on bottom** * *_ANY_ S/D rod _OR_ Control Bank A rod on bottom** * Occurs after _ALL_ S/D rods on top and CB "A" _12 steps_ off bottom* * *_ANY_ Control Bank B/C/D rod on bottom** * Occurs after respective bank _12 steps_ off bottom* * * * * Note:* * Rod Bottom alarm will clear when all S/D rods on top and CB "A" rods 12 steps off bottom.*

Answer 41

* *RHUTs** * Only procedurally defined method* * *RWST** * *Waste monitor tanks**

Answer 42

* _1F / 1G / 1H Tie - STBY_* * *15 sec alarms** * *30 sec _opens the tie breaker_** * *30.5 sec opens Aux / STBY incoming breakers _AND_ the ESF Feeder Breakers** * _1F / 1G / 1H STBY - STBY_* * *15 sec alarms** * *30 sec _opens other unit's STBY Breaker_** * *30.5 sec opens Tie / Unit's STBY incoming breakers _AND_ the ESF Feeder Breakers** * Does _NOT_ open Aux incoming breaker* * _1J AUX - STBY_* * *15 sec alarms** * *30 sec _opens Aux Breaker_** * *30.5 sec both STBY incoming breakers trip** * _1J STBY - STBY_* * *15 sec alarms** * *45 sec _opens other unit's STBY Breaker_** * *45.5 opens unit's STBY breaker and AUX breaker**

Answer 43

* _Loop 1:_* * *Drain to RCDT** * _Loop 2:_* * *Drain to RCDT** * _Loop 3:_* * *Drain to RCDT** * *CVCS Letdown** * _Loop 4:_* * *Drain to RCDT** * *CVCS _Excess_ Letdown** * * * Loop drains go to suction of RCDT pumps. Do _NOT_ go directly to RCDT. * * * * Note:* * Flange leakoff goes directly to RCDT.*

Answer 44

**P-12: T_avg \< 563 ˚F [2/4]** * * * Two redundant channels. One for each solenoid. Can bypass P-12 for _Bank #1 Steam Dumps_ by placing switches on CP007 to Bypass Interlock. (Spring returns to ON) * Must take switch to OFF/RESET to secure C/D feature.

Answer 45

**260 VAC** **59 Hz** * * * Prevents alternate power supply connection * * * * Note:* * Control switches to operate RDMGs are on local control panel only.*

Answer 46

* _HXs:_* * *Letdown HX** * *Excess Letdown HX** * *RCDT HX** * _Evaporators:_* * *Boron Recycle Evaporator** * *LWPS Evaporator** * _Sample Coolers:_* * *Boric Acid Sample Cooler** * *Primary Sample Coolers** * _Radiation Monitors:_* * *S/G Blowdown Rad Monitor** * *BRS Rad Monitor**

Answer 47

**Instrument Power Fuses then Control Power Fuses** ## Footnote * * * If control power removed first, then Rx trip or Rod control stop could occur.

Answer 48

* _Electrical Overspeed:_* * *5730 RPM (106%)** * _Mechanical Overspeed:_* * *5940 RPM (110%)** * + 109 / - 50 RPM* * * * * Normal Speed: 5400 RPM * Critical Speed: 2500 RPM

Answer 49

* _RHR Train "A":_* * *MOV-060A: PT-405** * *MOV-061A: PT-406** * _RHR Train "B":_* * *MOV-060B: PT-406** * *MOV-061B: PT-407** * _RHR Train "C":_* * *MOV-060C: PT-407** * *MOV-061C: PT-405** * * * Power Supplies: * PT-405: Train "A" * PT-406: Train "B" * PT-407: Train "C"

Answer 50

**23 ft above the fuel assemblies** ## Footnote * * * Bases: Minimum water level ensures 99% of the iodine gap activity released from a ruptured assembly will be removed.

Answer 51

**Containment Normal Sump**

Answer 52

**SUFW Lube Oil Pressure \< 5 psig** * *FW Isolation** * _SI OR P-14 ONLY_* **NPSH \< 80 psid** * *Undervoltage** * 1H Standby Bus* **Phase Differential** **Overcurrent** * * * On SUFW Trip: * Discharge MOV / Non-Return close (Signal sent for 160 sec) * Recirc Valve Closes (Signal sent for 5 sec) * Aux cooling pumps start

Answer 53

*_Power Operation:_* * _Keff:_* * *≥ 0.99** * _RTP:_* * *\> 5%** * _T_avg:_* * *≥ 350 ˚F**

Answer 54

**621 ˚F** ## Footnote * * * TRM 3.4.9.2 PZR Temperature Limits Applicable: At all times * * * * Note:* * By procedure limited to 320 ˚F*

Answer 55

**Data A _OR_ Data B failure** **Any test switch out of normal** **1 or 2 timing and data cards failed/loose \*\*** **Rod Deviation Cards disagree\*\*** **12VDC P/S Failure\*\*** * * * Generates a RPI Trouble Alarm (CP005). * * * * Note:* * The general warning light will actuate for any urgent or non-urgent alarm condition, except P/S Failure, Rod Deviation, or Timing and Data card disconnect.*

Answer 56

* *2485 psig ± 1%** * + 2% / - 3% (LCO 3.4.2.2)* * * * 3 safety valves Keeps RCS ≤ 2735 psig w/: * Turbine Trip w/ _NO_ Rx Trip * PORVs do _NOT_ operate * Steam dumps do _NOT_ operate * * * * Note:* * Relieves to PRT*

Answer 57

**MCR** **HP** **TSC** **Computer Room** * * * * HP, TSC, and Computer room can only use "User Mode." (Data Retrieval/acknowldeging alarms) * MCR normally uses "Windows Supervisor Mode." (Allows non-tech spec parameters to be monitored) * "RM-11 Supervisor Mode" can only be used in MCR and requires password. (Allows changing of setpoints)

Answer 58

*_Cold Shutdown:_* * _Keff:_* * *\< 0.99** * _RTP:_* * *0%** * _T_avg:_* * *≤ 200 ˚F**

Answer 59

**4 of 6 units** *LCO 3.6.2.3 Containment Cooling 5 of 6 units OPERABLE* ## Footnote * * * Keeps containment ≤ 110 ˚F during normal operation and during spray. (LCO 3.6.1.5 Containment Air Temperature)

Answer 60

* _HHSI:_* * *\< 1600 psig** * _Accumulators:_* * *590 - 670 psig** * _LHSI:_* * *\< 300 psig** * * * Receive water from RWST. * * * * Note:* * During DBA, Accumulators will inject 1^st.*

Answer 61

**Kr-85** **Xe-133**

Answer 62

**Collects _Reactor Grade_ leakage and other _tritiated_ and _aerated_ water sources** ## Footnote * * * * Note:* * Non-Reactor Grade water goes to Condensate Polishing Regeneration Waste Collection Tank (George Tank)*

Answer 63

* _Auto Start:_* * *≥ 540 RPM AND \< 35 psig header pressure** * * * Once started must manually secure pump Powered: Class 1E 480V MCC * Same as standby JW pump

Answer 64

**Shutting MOV-465 _OR_ MOV-468 prior to FV-011** ## Footnote * * * Switches located on CP004. * * * * Note:* * FV-011 shuts first to prevent water hammer in the regenerative HX.*

Answer 65

* *RHR HX Outlet Valve opens** * *DWS Makeup to CCW Surge tank closes** * *RCB Chilled Water Isolates to RCFCs** * *RCDT HX Isolates** * *Train "B" / Train "C" CCP X-Conn Closes** * Supply and Return* * *One CCW return header isolation closes**

Answer 66

* *Isolates CCW Header** * Isolates RCP Upper/Lower Bearing Coolers, Thermal Barrier, RCP Motor Air Coolers, SFP HX, PASS Coolers* **CCW Train "B" → CCP "B" and Seal Water HX** **CCW Train "C" → CCP "A" and PDP** * *Opens RHR Outlet Valves for running CCW Pumps _ONLY_** * Min flow requirements* * * * * Note:* * As soon as CCW common header isolated, standby CCW pump will start on CCW Header Pressure - Low (76 psig)*

Answer 67

* _Manual:_* * *Used when \< 5% Feed Flow** * * * * _Single Element:_* * *Used 5% - 20% Feed Flow** * *_DAST Level ONLY_** * Average of DST #1/#2 Level compared to LK-7406 setpoint (CP008)* * * * * _Three Element:_* * *Used \> 20% Feed Flow** * *_DAST Level_** * Average of DST #1/#2 Level compared to LK-7406 setpoint (CP008)* * *_Feed Flow_ compared to _Condensate Flow_** * Sum of all 4 feed flows* * * * Controls CD-7406A (Low Flow) [\<40%] and CD-7406 (High Flow) [≥ 40%] (Switch at 40% is automatic)

Answer 68

**3%** * * * TRM 3.11.2.5 Explosive Gas Limit Applicability: At all times * * * **Placing inlet (FV-4657) _OR_ outlet (FV-4671) handswitches in OPEN causes O₂ sensor to become inoperable.** * * * * Note:* * *0%-5% range normally selected because system trip will occur at 20% of scale (1%).* * *If 0%-25% range selected, trip would be 5% (Above TRM limit)*

Answer 69

* _Auto Start:_* * *ESF DG Sequencer (25 Sec)** * MODES I, II, III* * *CCW Header Pressure - Low (76 psig) [15 sec TD]** * *ECW Header Pressure - Low (30 psig) [2/3] [15 sec TD]** * Low Pressure on other two trains* * _Auto Stop:_* * *Discharge Valve not 95% open after 25 sec** * N/A for SI* * * * * Note:* * *15 Sec TD is to prevent inadvertant train S/U during transient conditions.* * *Discharge valve must be open after 25 sec b/c ECW pump does not have a recirc line to protect the pump*

Answer 70

**-4 / + 10 Steps**

Answer 71

**117 Heaters** * *17.95 KW / Heater** * 2101 KW Total* * * * LCO 3.4.3 PZR Applicable MODES 1-3 * Requires 2 groups (A/B) w/ 175 KW each

Answer 72

* *Control Bank misalignment of ± 12 steps** * Any rod and bank* ## Footnote **S/D Banks \> 18 steps from full out**

Answer 73

* _Common to all: (Makes Sense)_* * Spells Leaches* * ***_L_**HSI (A/B/C)** * ***_E_**CW (A/B/C)** * ***_A_**FW (1/2/3)** * ***_C_**CW (A/B/C)** * ***_H_**HSI (A/B/C)** * ***_E_**AB Essential Chiller (A/B/C)** * *Containment **_S_**pray (A/B/C)** *_Different: (Doesn't Make Sense)_* * _E1A:_* **CCP 1B** * _E1C:_* **CCP 1A**

Answer 74

* _Source Range:_* * *DP1201/DP1202** * _Intermediate Range:_* * *DP1201/DP1202** * _Power Range:_* * *DP1201 - DP1204** * _Extended Range:_* * *DP001/DP002** * * * * Loss of power, NIs fail High. * If still in SR or IR, Rx will trip if DP-1201/1202 are lost.

Answer 75

**600 psig** * * * * Blue permissive light on CP005 * _Bearing Oil pump must be running to start pump. (Not required for light however)_ * Must be operated for ≥ 2 mins by procedure prior to starting RCP.

Answer 76

* _Motor Driven:_* * *SG Level - Low 2 (20%) [2/4 on 1/4]** **AMSAC (15%) [1/1 on 3/4] [25 sec TC]** * *Sequencers (MODE I,II,III)** * MODE II starts pump but valves do _NOT_ open* * _Turbine Driven:_* * *SG Level - Low 2 (20%) [2/4 on 1/4]** **AMSAC (15%) [1/1 on 3/4] [25 sec TC]** **SI** * * * Regulating Valves throttle and OCIVs open for: * SG Level - Low 2 (20%) [2/4 on 1/4] * AMSAC (15%) [1/1 on 3/4] [25 sec TC] * SI

Answer 77

* _P-4 True:_* * *T_avg - Low (574 ˚F) [2/4]** * _No Permissives:_* * *SI** * *P-14** * S/G Level - High (87.5%) [2/4 on 1/4]* * * * P-4 True: Rx Trip [1/2] _AND_ Bypass Bkr [1/2] open * * * * Note:* * *Closes FWIVs, bypasses, FRVs, Low FRVs, and PBVs* * *Trips MFP turbines, SUFW, and the Turbine. (SI _AND_ P-14 ONLY)* * *Does _NOT_ trip the FW Booster pumps*

Answer 78

**PT-458** ## Footnote * * * P-11: PZR Pressure ≥ 1985 psig [2/3]

Answer 79

* *≤ 10 Curies** * Excludes Tritium and entrained Noble Gases* ## Footnote * * * LCO N/A to WMT D/E/F b/c they have a berm. Used for temporary tanks.

Answer 80

**Aux Steam** *Used During S/U Switch on CP008* * *Main Steam** * Used \< 25% and during load rejection* **Extraction Steam** *8^th stage of HP turbine (25% - 100%) Supplied from 2 of 6 crossunder piping*

Answer 81

* *RCB Chillers** * 11A (1D1) / 11B/C (2D2)* * *MAB Chillers** * 11A/B (1D1) / 11C/D (2D2)* * *OLACW Pumps** * 11 (1D2) / 12 & 13 (1D1)* * *Low Pressure Heater Drip Pumps** * 11 (1D1) / 12 & 13 (1D2)* * *BTRS Chiller** * May or May not be abandoned*

Answer 82

* _95%_* * *112A Full Divert** * LT-112 AND LT-113* * *Alarm** * LT-113* * _68% - 95%_* * *112A modulates diverting to RHT** * LT-112* * _48%_* * *Stops Auto M/U** * LT-112* * _28%_* * *Starts Auto M/U** * LT-112* * _15%_* * *Alarm** * LT-112 AND LT-113* * _3%_* * *Shifts CCP suction from VCT to RWST (112C / 113B)** * *Isolates VCT outlet (112B / 113A)** * LT-112 AND LT-113*

Answer 83

* _DP001:_* * Primary / Secondary / Battery* * *E1A1 / E1A1 / E1A11** * _DP1201:_* * Primary / Secondary / Battery* * *E1A2 / E1A1 / E1A11** * _DP1202:_* * Primary / Secondary / Battery* * *E1A4 / E1A4 / E1D11** * _DP1203:_* * Primary / Secondary / Battery* * *E1B1 / E1B1 / E1B11** * _DP1204:_* * Primary / Secondary / Battery* * *E1C4 / E1C2 / E1C11** * _DP002:_* * Primary / Secondary / Battery* * *E1C2 / E1C2 / E1C11** * * * * Note:* * Primary source is through the inverter / rectifier. Secondary is through the VRT.*

Answer 84

* _Movement of:_* * *Fuel** * *Sources** * *Reactivity Control Components** * Excludes RCCAs attached to integrated head* * _Applicable:_* * *Head Removed** * *Fuel in Core**

Answer 85

**100 hrs** ## Footnote * * * TRM 3.9.3 Decay Time Applicable: During movement of irradiated fuel in the Rx Vessel

Answer 86

* *LOCA** * Double guillotine shear of cold leg* * *Rod Ejection** * Most reactive control rod* * *MSL Break** * Double ended shear of largest piping* **Fuel Handling Accident**

Answer 87

* _WHT:_* * *FDT (CPRWCT)** * Uses Demins/Filters* * _CPRWCT:_* * *FDT** * Only Strainers* * _Surge Tanks:_* * *FDT (CPRWCT)** * Only Strainers* * _LHST:_* * *WMT C** * Only Strainers* * _FDT:_* * *WMT D/E/F** * Strainers / ALPS* * _RHTs:_* * *WMT D/E/F** * ALPS*

Answer 88

**125 VDC Bus 1B** ## Footnote * * * Feeder breakers for the 13.8 kV Aux Buses are from the 125 VDC Bus 1A. Precludes the possibility of losing both primary and backup protection of the containment penetration conductors for the RCPs?

Answer 89

* _Green:_* * *Off** * Auto Regulator de-energized, Base Adjust on Service* * _Amber:_* * *Test** * Auto Regulator energized with output to null meter* * _Red:_* * *On** * Auto Regulator in service*

Answer 90

* *17% [1/2]** * LT-465/467 _OR_ LT-466/467* * * * * Backup heaters will turn back on if in auto once PZR LVL \> 17%. [2/2] * Control Heaters have to be cycled off and then back to on. * * * * Note:* * For LOOP / SI, B/U heaters control switch must be cycled to turn back on.*

Answer 91

**3 of 6 RCFCs** ## Footnote * * * * Note:* * Need 2 of 3 CS pumps*

Answer 92

**Runout of Pump (675 gpm)** ## Footnote * * * Will not see on flow meters

Answer 93

**High D/P across demins (105 psig)** ## Footnote * * * Controlled from CP008 (Open/Shut) and locally (Can Jog)

Answer 94

**TG Lube Oil EOP** **Air Side Seal Oil Back-up Pump** **SGFPT Emergency Oil Pumps** **Generator Breaker Control Panel/Power**

Answer 95

* *UATs** * Located on CP010* **B ESF XFMRs** *Located on CP003* B Class 1E buses receive power from standby XFMR which doesn't have load changer * * * As Switchyard voltage lowers, load changer will adjust XFMR tap to raise bus voltage back up. Will recover bus voltage to \>3920 Volts within 35 seconds from a minimum switchyard voltage of 327.8 kV

Answer 96

**≤ 350 ˚F** * *≤ 332 psig** * Interlock to open MOV-060/MOV-061* * * * No auto close features for MOV-060/MOV-061.

Answer 97

* _Data Cabinets:_* * *DP003** * _Control Unit:_* * *DP003 / DP004**

Answer 98

* _Undercompensated:_* * *Higher than actual reading** * _Overcompensated:_* * *Lower than actual reading** * * * * If detectors are undercompensated, source range may not energize. * Slightly undercompensated is preferred. * * * * Note:* * If compensated correctly, source range will energize ≈ 15 mins after Rx shutdown.*

Answer 99

* _MOV-112B AND MOV-113A_* * *SI** * Opens MOV-112C AND MOV-113B* * _MOV-112B_* * *VCT Level - Low 2 (3%) [LT-112]** * Opens MOV-112C* * _MOV-113A_* * *VCT Level - Low 2 (3%) [LT-113]** * Opens MOV-113B* * * * To ensure CCPs have suction water at all times, RWST supply valves (MOV-112C/MOV-113B) must be **_full open_** to close respective VCT Outlet valve (MOV-112B/MOV-113A). * * * * Note:* * *Holding the manual switches for the valves (112B/C and 113A/B) will override any auto functions and the valves will position as selected.* * *Located on CP004.*

Answer 100

* _Auto Start:_* * *SI** **_WITH_** **Containment Pressure - High 3 (9.5 psig) [2/4]** * *SI** **_WITH_** **Manual [2/2]** * CP002/CP005* * _Trip:_* * *Overcurrent** * * * CS Spray Actuation: Opens discharge valve Pump Start: Starts ECCS cubicle vent fan * * * *Note: Cubicle fan will also start on room high temperature. (96 ˚F)*

Answer 101

* _MOV-0514:_* * *Terry Turbine Cubicle (IVC 10')** * _MOV-0143:_* * *By SG PORVs (IVC 58')** * * * Must leave MOV-0143 open (≥ 2 hrs) or water collects in pipe and will result in overspeed of terry turbine.

Answer 102

* _Pressure:_* * *2250 psig → 30 psig** * Min D/P: 220 psid* * _Flowrate:_* * *8 gpm → 3 gpm** * _Suction:_* * *CVCS** * _Discharge:_* * *VCT \*\*** * CCP Suction* * *Seal #2** * * * Inlet temperature ≈ 110 ˚F (Do not exceed 230 ˚F) ≈ 5 gpm goes to pump radial bearing and thermal barrier HX * * * *Note:* On Φ_A CI, Seal return to VCT isolates and relief will lift (150 psig) to send water to PRT.

Answer 103

* *HHSI/LHSI Hot leg injection valves (MOV-008/MOV-019)** * 100% Power: Closed w/ power locked out* * CP-001* * *Accumulator outlet valves (MOV-039)** * 100% Power: Open w/ power locked out* * CP-001 / ASP* * * * _No accumulator pressure / level indicators exist on ASP!!_ * * * * Note:* * 2 transfer switches for accumulator outlet valves. 1 transfers control and VPI and the other transfers power lockout feature.*

Answer 104

* _ECW Intake Structure:_* * *Fire Hydrant #13** * Restore _OR_ Route hose within 1 hr* * _AFWST:_* * *Fire Hydrant #7 (Unit 1)** * Restore _OR_ Route hose within 1 hr* * *Fire Hydrant #20 (Unit 2)** * Restore _OR_ Route hose within 1 hr* * _Fire Pump Hose House:_* * *Fire Hydrant #10** * Restore _OR_ Route hose within 1 hr*

Answer 105

* _70 - 200 ˚F:_* * *515 psig** * _220 - 380 ˚F:_* * *730 psig** * * * Uses Auct Low WR T_H / PT-403 * * * * Note:* * Normal PORV setpoint is ≈ 2335 psig. (Master pressure controller 87.5%)*

Answer 106

* *Logic Error** * 0 Current sent to stationary and movable grippers at same time* * *Regulation Error** * Current doesn't match order or Full current for too long* * *Phase Failure** * Excessive voltage ripple* * *Multiplex Error** * Wrong rod getting current* * *Rod Holdout switches out of position** * *Loose Circuit Card** * * * * Stops Auto/Manual rod motion * Individual Bank rod motion will still work * Sends reduced current signal to affected group movable/stationary grippers * * * * Note:* * Non-Urgent is a loss of 1 of the 4 power supplies and will not affect system operation.*

Answer 107

**SGNR Level \> 5%** **SG Pressure \> 685 psig** * * * * FWIVs fail closed on loss of hydraulics/power. (Will not close on loss of N₂ pressure) * Hydraulic open / N₂ closed * FW Isolation Energizes Train A/B solenoids, which secure the hydraulic pumps and dump hydraulic fluid (Manual switches [2 / SG] located on CP006) * _Open permissives being met allows de-energizing Train A/B solenoids._ * * * *Note: Same concept for FWIBs and Preheater Bypass Valves (PBVs) except solenoids de-energize to dump hydraulics and energize to allow opening.*

Answer 108

* *Blowdown valves shut** * Once SI clears, must take valves to shut then back to auto on CP002* * * * CP002 switch in AUTO: * ECW Train 2A: Valve opens * ALL other ECW Trains: Cycles Open/Shut with ECW pump starting/securing Valve physically located on MAB 10' at ECW Sump. (No local switch) * * * *Note: By procedure, every blowdown valve with exception of train 2A is maintained in the CLOSE position on CP002*

Answer 109

**CD Header Pressure \< 300 psig** ## Footnote * * * Ensures 5600 gpm flow through GSS Condenser. * * * *Note: Indicated CD Flow on CP008*

Answer 110

* *Engine Overspeed** * 660 RPM (110%)* **Generator Differential** * *Turbo / Engine Lube Oil - Low [1/2 on 2/2]** * Normal Mode [1/2 on 1/2]* * *Emergency Stop Pushbutton [2/2]** * ZLP-102* * *Emergency Stop Plunger pulled out** * CP003*

Answer 111

**2200 psig** ## Footnote * * * LCO 3.2.5 DNB Parameters Applicable: MODE 1

Answer 112

* *1900 RPM** * 45 sec after start* ## Footnote * * * Must trip terry turbine if \< 1900 RPM to prevent damage

Answer 113

**137 steps** * * * * When Control Bank A at 137 steps, Control Bank B will begin to lift. * Process repeated for Control Bank C and Control Bank D.

Answer 114

* *Bearing Oil Pressure - Low (10 psig)** * Emergency Oil Pump auto starts at 12 psig* **Lube Oil pressure → Interface valve - Low (35 psig)** **Thrust Bearing Wear (± 20 mils) [2/2]** **High / Low Presure Stop valves Closed** **SI** **P-14** * *Mechanical Overspeed (5940 RPM) [110%]** * +109 RPM / -50 RPM* **NPSH - Low (115 psid [3 Sec TC]) [2/2]** **Vacuum - Low (14" Hg _OR_ 3 psig)** *\> 20" Condenser Vacuum (14" Hg) \< 20" Condenser Vacuum (3 psig)* * *Manual (Electrical/Mechanical Overspeed)** * Local (Both) / CP006 (Electrical _ONLY_)* * *Any trip from Woodward 509** * Electrical Overspeed (5730 RPM) [106%]* * * * Note: Woodward 509 Computer/Printer located on TGB 55'

Answer 115

**60,500 gallons** LCO 3.8.1.1 AC Sources - Operating LCO 3.8.1.2 AC Sources - S/D LCO 3.8.1.3 AC Sources - S/D ## Footnote * * * Capacity: 70,000 gallons **Will generate a TROUBLE Alarm (Appeared on NRC Exam)** * * * * Note:* * Will last for 7 days (≥ 60,500 gallons)*

Answer 116

* _No Permissives:_* * *SI** * *Radiation - High (RT8012/RT8013) [1/2]** * _Manual:_* * *Containment Phase A [1/2]** * (CP002/CP005)* * *Containment Phase B [2/2 on 1/2]** * (CP002/CP005)* * * * Reset located on CP022. * * * * Note:* * Isolates Containment Normal and Supplemental Purge Systems and Containment Airborne Activity Monitor (RT-8011)*

Answer 117

* _PCV-655A:_* * *87.5%: Opens (2335)** * *75%: Closes (2315)** * _Spray Valves:_* * *72%: Full Open (2310)** * *40.5%: Start to Open (2260)** * _Control Heaters:_* * *34.5%: Zero Power (2250)** * 22%: NOP (2235)* * *15.5%: Full Power (2220)** * _B/U Heaters:_* * *14.5%: Turn Off (2218)** * *9.5%: Turn On (2210)**

Answer 118

**85 ˚F** ## Footnote * * * Requires one MAB supply and exhaust fan operating

Answer 119

* _70 - 200 ˚F:_* * *475 psig** * _220 - 380 ˚F:_* * *660 psig** * * * Uses Auct Low WR T_C / PT-404 * * * * Note:* * Normal PORV setpoint is 2335 psig. (B/U pressure channel)*

Answer 120

* _PR Upper Detector Deviation:_* * *_Highest_ PR Channel Upper Detector Current \> 2% above _Average_ detector current [60 sec TC]** **Upper detector current ≤ 50% of full power current** * _PR Lower Detector Deviation:_* * *_Highest_ PR Channel Lower Detector Current \> 2% above _Average_ detector current [60 sec TC]** **Lower detector current ≤ 50% of full power current** * _PR Channel Deviation:_* * *Highest to lowest PR channels deviate \> 4% [5 sec TC]**

Answer 121

* *≥ 540 RPM _AND_ \< 6 psig header pressure** * Blocked for 20 sec on S/U* * * * Once started must manually secure pump Powered: Class 1E 480V MCC * Same as standby LO pump

Answer 122

* _0% RTP (567 ˚F):_* * *25%** * _100% RTP (593 ˚F):_* * *57%** * * * At actual 100% RTP (592 ˚F) PZR Level will be 55.7%.

Answer 123

*_Hydraulic Pump:_* **ESF MCCs** *Train A: SG "A" and SG "D" / Train B: SG "B" / Train C: SG "C"* *Can be bypassed using station blackout switches Once bypassed, can operate PORVs with accumulator pressure (1.5 strokes)* * _Servo Motors:_* * *PORV "A": DP1201** **PORV "B": DP1203** **PORV "C": DP1204** **PORV "D": DP1202**

Answer 124

* _6 Sec / 10 Sec:_* * *HHSI / LHSI** * _15 Sec:_* * *Containment Spray** *(1st Try)* * *RCFC (11/12)** * _20 Sec / 25 Sec:_* * *CCW / ECW** * _30 Sec:_* * *AFW** * _35 Sec:_* * *CR / EAB HVAC (Emergency MODE)** * *Essential Chilled Water Pump** * *Standby Essential Chiller** * _40 Sec:_* * *Containment Spray** *(2nd Try / Locks in)* * _240 Sec:_* * *Running Essential Chiller(s)** * _280 Sec:_* * *Sequence Complete**

Answer 125

**Actuation Train "A" → Logic Train "R"** **Actuation Train "B" → Logic Train "S"** * * * Actuation Train "C" does _NOT_ result in a logic train's urgent alarm. Actuation Train "C" trouble alarm does result in a Logic Train "R" _AND_ Logic Train "S" trouble alarm. * * * * Note:* * Urgent alarms on CP026.*

Answer 126

**≤ 350 ˚F** * * * * PCV-655A (Auct Low WR T_H / PT-403) * PCV-656A (Auct Low WR T_C / PT-404) * * * COMS controller completely independent of master pressure controller. * * * * Note:* * Manually armed on CP004*

Answer 127

* ***_P_**R (NI-44) [45˚]** * 2 Detectors (Top and Bottom)* * ***_E_**xtended Range [90˚]** * Center of core* * ***_P_**R (NI-41) [135˚]** * 2 Detectors (Top and Bottom)* * ***_S_**R (NI-31) / **_I_**R (NI-35) [180˚]** * SR on bottom / IR at midplane* * ***_P_**R (NI-43) [225˚]** * 2 Detectors (Top and Bottom)* * ***_E_**xtended Range [270˚]** * Center of core* * ***_P_**R (NI-42) [315˚]** * 2 Detectors (Top and Bottom)* * ***_S_**R (NI-32) / **_I_**R (NI-36) [0˚]** * SR on bottom / IR at midplane* * * * Start at 45˚ and say PEPSI x2.

Answer 128

* _Level:_* * *≥ 25.5 ft** * Max Level 26 ft (FSAR)* * _Temperature:_* * *≤ 99 ˚F** * * * Pond sized to have a _30 day_ cooling water supply to safely shutdown and cooldown both Units while maintaining a heat sink for heat removal * * * * Note:* * *ECW Bay LVL indication and alarms located on CP002* * *ECW Bay LVL - Low 2 (14.96 ft) for LCO 3.7.5 entry.*

Answer 129

**SI** **RHR Flow - Low (925 gpm [5 sec TC])** * * * CP001 Indications: * Amps * Flow

Answer 130

* _122 psig / 119 psig / 116 psig / 113 psig:_* * *Compressors 11 - 13 / 14 Start** * Lead / Standby / Lag / Air Cooled* * _100 psig:_* * *Service Air Isolation Closes** * Reset on ZLP-134 (TGB 29' by compressors 11/12/13)* * _90 psig:_* * *IA to yard Closes** * _88 psig:_* * *Low Power FRVs drift closed** * _80 psig:_* * *IA Dryer Bypass Opens** * Reset by valve* * *Letdown Header Orifice header isolation valves drift Closed** * _67 psig:_* * *MFRVs drift Closed** *_60 psig:_* **Manually Trip the Rx MSIVs drift Closed** * * * Service / IA Air pressure indicated on CP008.

Answer 131

**2 SR Detectors** **Both with visual indication** **One with audio for MCR and Containment** * * * 1 Extended Range may be substituted for 1 SR if remaining SR provides audible count rate.

Answer 132

* *≤ 1816 ft³** * ^{≈ 100% PZR LVL}* ## Footnote * * * LCO 3.4.3 PZR Applicable in MODES 1-3 * * * * Note:* * Total PZR volume is 2100 ft³*

Answer 133

**485,000 gals** ## Footnote * * * LCO 3.7.1.3 AFWST Applicability: MODES 1 - 3

Answer 134

**RHR HX Bypass Closes** **RHR HX TCV Valve Full Open** **RHR Pumps Trip** * *CCW from RHR HX opens** * CCW pump mini-flow concerns*

Answer 135

**1621 Amps / Winding** ## Footnote * * * Equivalent to 2 Aux Busses and all 6 ESF busses fully loaded.

Answer 136

* _Reference Leg Break:_* * *Less Mass → D/P ↓ → L_ind↑** * _Diaphragm Failure:_* * *D/P ↓ → L_ind↑** * _Reference Leg Heating:_* * *Less Mass → D/P ↓ → L_ind↑** * w/o compensation*

Answer 137

**2 Tanks (300,000 gal each)** **2 Pumps (2500 gpm each)** * * * * 1 Pump FUNCTIONAL (Restore in 7 days) * Total Volume ≥ 300,000 gal but \< 600,000 gals (Restore in 7 days) * Pumps _AND_ Volume _NOT_ FUNCTIONAL (Restore in 24 hours) * Underground Piping _NOT_ FUNCTIONAL (Restore in 24 hours) * * * *Note: Only Safety Related portion of the system is the CIVs*

Answer 138

* _Turbine End:_* * *4^th Stage: FWH 14A/B** * *6^th Stage: FWH 15A/B/C** * *8^th Stage: FWH 16A/B/C** * _Generator End:_* * *2^nd Stage: FWH 13A/B** * *6^th Stage: FWH 15A/B/C** * * * Blowdown flash tank steam goes to FWH 13A/B.

Answer 139

**Output bkr will open and then MODE I will occur** ## Footnote * * * If output bkr does not trip within _1 sec_, incoming breaker will trip, sequencer will strip bus w/ exception of LC breakers and MODE III sequence will run.

Answer 140

**40%** 12 steam dumps (^3.33%/_{Steam Dump}) ## Footnote * * * Controls pressure/temperature following a 50% load reject (10% is covered by rods)

Answer 141

* _Major Source:_* * *Radiolytic decomposition of water \*\*** *_Other Sources:_* **Zirc water reaction \*\*** **H₂ from the RCS** *Max is 1190 scf* **Corrosion of metals and paint in containment** Zinc-based paints & galvanized steel **Aluminum** Less of a source than zinc * * * * Note:* * Radiolytic decomposition of water and Zirc water reaction are variable and will increase with fuel damage*

Answer 142

**95% of rated voltage and frequency achieved** **6 sec TD from LOOP signal received** * *Breakers open for stripped loads** * If breaker failed to open, the sequencer locks up*

Answer 143

**Bearing Oil Pressure \< 12 psig** ## Footnote * * * Does not supply interface valve so SGFPT will trip. ^{1 EOP}/_SGFPT * * * *Note: Powered from 250VDC Swbd 1A*

Answer 144

**Auctioneered High T_avg** ## Footnote * * * Compares selected controlling channel level (LT-465 or LT-467) to program level to determine demand to FCV-0205.

Answer 145

**All loop flows in that loop fail to zero** ## Footnote * * * Loop flow consists of 1 High Pressure (Outside of elbow) and 3 Low Pressure (Inside of elbow). ↓∆P = ↓HP - LP → Flow ↓ * * * *Note: Rupture of a Low pressure tap would result in Flow failing high on _1 of 3_ flow instruments.*

Answer 146

*_Startup:_* * _Keff:_* * *≥ 0.99** * _RTP:_* * *≤ 5%** * _T_avg:_* * *≥ 350 ˚F**

Answer 147

* _T_avg Mode:_* * *C-9** * Condenser Vacuum \> 22" Hg AND CW breaker Shut [1/4]* **_AND_** * *C-7 OR C-8** * C-7: 10% load reduction _OR_ 5%/min* * C-8: EH pressure 1245.8 psig [2/3] _OR_ TVs closed [2/4]* * _Pressure Mode:_* * *C-9** * Condenser Vacuum \> 22" Hg AND CW breaker Shut [1/4]* **_AND_ Steam Header Pressure \> Setpoint** * * * If C-7 energizes #3 solenoid, must reset on CP007 to de-energize #3 solenoid.

Answer 148

* *Blowdown** * Begins with LOCA and ends with RCS pressure = CTMT pressure* * *Refill** * Water at bottom of the reactor vessel and reaches the bottom of the fuel rods via addition of ECCS (Accumulators and SI pumps).* * *Reflood** * Rx vessel filled with water* * Core temperature rise has terminated* * Core temperatures have been reduced to their long term steady state level.* * *Long Term Recirculation** * Cold Leg Recirc (1^st Phase)* * Hot Leg Recirc (2^nd Phase)* * Hot Leg Recirc starts 5.5 hrs (Operator Action) after start of LOCA and cools upper head and prevents boron precipitation.*

Answer 149

* _Internal:_* * *56.5 psig** * Between -0.1 and +0.3 psig* * CNMT PRESS HI / LOW (CP002)* * (LCO 3.6.1.4 Containment Internal Pressure)* * _External:_* * *3.5 psig** * * * Max expected for DBA is _41.2 psig_ CNMT PRESS HI/LOW on CP002 will put you in LCO 3.6.1.4 Containment Internal Pressure. * * * * Note:* * Design temperature is 286 ˚F*

Answer 150

* _High 2 (89%/90%): [2/2]_* * *DA Inlet MOVs Close (CD-574/CD-575)** **Extraction Steam Block / Non-Return valves Close** **FW HTR 11A/B Drain to DA Valves Close** * _86%: [2/2]_* * *High Level Dump Valves Open (FW-7175/7175A)** * _40%:_* * *Start Standby Condensate Pump (Operator Action)** * Does not require venting* * _30%:_* * *POP09/POP04 requires Rx Trip** * _6%:_* * *FWBPs Trip** * * * Normal Level is 70% * * * *Note: Meter on CP008 and ICS will stop indicating at 30%*

Answer 151

*_Train A/B/C:_* ## Footnote *_(A / B ONLY)_* **Rx Trip Breaker Control Power PZR PORVs** *_ESF DGs:_* **Field Flash Sequencers (A/B/C) PL-139A/B/C (DG Control Panels)** *_ESF:_* **4.16 kV / 480V ESF Control Power PL-39A/B/C (EAB)** **Class 1E 120V Inverters** *_Train D:_* * *Terry Turbine MOVs** * *PL-40A (EAB)** * *Class 1E 120V Inverter (1202)**

Answer 152

**Will close if opened** ## Footnote * * * Controlled from upper section of APC-2.

Answer 153

**Top of Containment Dome** **Above S/Gs (S/G C/D)** **Inside S/G Compartment (S/G C/D)** **Inside Primary Shield (S/G A/B)** * * * Controlled from CP002 * * * * Note:* * H₂ monitor "B" penetrations used by PASS*

Answer 154

* *Restricts blowdown of S/G during SLB\*\*** * Safety Function* * *Develops steam flow signal** * Normal Operations* * * * * Limit primary cooldown rate * Limit stress on the S/G internals

Answer 155

* _Automatic Operation:_* * *Starts within _1 min_ and can run unattended for _10 mins_** * _Flowrate:_* * *Supplies 500 gpm to _1 S/G_ for FW Rupture / SLB** **Supplies 500 gpm to _2 S/Gs_ for loss of FW / LOOP** * _Cooldown:\*\*_* * *50 ^˚F/_hr with 1 RCP** **25 ^˚F/_hr on natural circ** * _AFWST:\*\*_* * *Maintain plant in hot standby for _4 hrs_ and then go to RHR conditions** * _Containment Integrity:_* * *Prevents reaching containment design pressure (56.5 psig)** * * * * Note:* * Showed up on instructor's NRC exam*

Answer 156

**SG "D" PORV line**

Answer 157

* *CI Φ_A** * *PZR Lvl - Low (17%)** * LT-0465 _OR_ LT-0468* * *Loss of Air** * *Loss of MCC E1C1** * * * * PZR Low Lvl on _LT-0465_ will close _LCV-465_ after _10 sec TD_. * PZR Low Lvl on _LT-0468_ will close _LCV-468_ after _10 sec TD_. * * * * Note:* * To reopen FV-011:* * *PZR LVL \> 17% on LT-0465 AND LT-0468* * *LCV-465 AND LCV-468 open* * *CI Φ_Asignal not present*

Answer 158

* _RHR:_* * *A: E1A2** * *B: E1B2** * *C: E1C1** * _SFPC:_* * *A: E1B1** * *B: E1C1** * _PZR B/U Heaters:_* * *A: E1A1** * *B: E1C1**

Answer 159

**4%** ## Footnote * * * Prevents thermal stratification at low feedwater flows * * * *Note: Cannot use main feed when RCS temperature \< 340 ˚F.*

Answer 160

* *3 Hot Legs** * Located 120˚ apart for stratification purposes* * *1 Cold Leg** * Located downstream of RCPs (Stratification not a concern)* * * * Feed into T_avg and ∆T.

Answer 161

*_Flat Region (Green)_* **Ensures that no bulk boiling will occur at the core exit so that the OPΔT and OTΔT trips remain functional** * * * *_Steep Region (Pink)_* **Assures that DNB does not occur (DNBR is maintained \>1.52)**

Answer 162

* _Auto Start:_* * *Trip of running pump** *_Start Permissives:_* **Lube Oil Pressure \> 8 psig DAST Level \> 6% Oil Pressure ≥ 11 psig Local switch not in stop** *_Trip:_* **Lube Oil Pressure \< 8 psig DAST Level \< 6% UV on switchgear Overcurrent** * * * Breaker Closing: * Opens Discharge MOV (Locks in open signal for _3 min_) * Recirc valve will modulate (_8000 gpm_) Start permissives being met will be indicated by blue light on 13.8 kV switchgear * Does not indicate whether MCR switch is in Stop/PTL * * * *Note: By procedure a standby FWBP will have it's discharge MOV already open*

Answer 163

* _2% - 40%:_* * *MS Equalizing Header** * _40% - 100%:_* * *Reheat Steam from MSR 11**

Answer 164

*_Pump 1:_* **Header Pressure 130 psig [5 sec TD] Loss of Power to Panel** *_Pump 2:_* **Header Pressure 120 psig [10 sec TD] Loss of Power to Panel** *_Pump 3:_* **Header Pressure 110 psig [15 sec TD] Loss of Power to Panel** * * * Jockey pump maintains system pressure \> 130 psig (35 gpm) * * * *Note: Jockey pump operated locally in "Hand" position. Auto position non-functional.*

Answer 165

* *120 gpm - 150 gpm** * Normally in service* * *85 gpm - 100 gpm** * *25 gpm - 30 gpm** * * * Flowrate based on 2235 psig in RCS. * * * * Note:* * *FV-012 (120 gpm - 150 gpm) and FV-013 (85 gpm - 100 gpm) are air operated and fail close on loss of air.* * *FV-014 (25 gpm - 30 gpm) is a MOV.*

Answer 166

**Computer Room** **Computer Battery Room** **Relay Room** **TSC Computer Room**

Answer 167

**≥ 90 psig** ## Footnote * * * Cannot decay more than 0.5 psig in 8hrs. Cannot decay more than 1.5 psig in 24 hrs. * * * * Note:* * LCO 3.6.1.3 Containment Airlocks is APPLICABLE in MODES 1 - 4.*

Answer 168

* _Loop 1:_* * *RHR "A" Suction** * *SI "A" Recirc** * *Sampling** * _Loop 2:_* * *RHR "B" Suction** * *SI "B" Recirc** * _Loop 3:_* * *RHR "C" Suction** * *SI "C" Recirc** * *Sampling** * _Loop 4:_* * *PZR Surge Line**

Answer 169

* _Source Range:_* * *Proportional Region** * _Intermediate Range:_* * *Recombination Region** * Inner Can* * *Ionization Region** * Outer Can* * _Power Range:_* * *Ionization Region**

Answer 170

* _APC-2:_* * *Flow Controlled between 550 gpm - 640 gpm** * Does not look at SGWL just AFW flow* * _Manual:_* * *Operator can manually jog valve as long as APC-2 not actively adjusting flow.** **APC-2 will return flow to band once sw. released.** **If switched held by operator until full open reached, APC-2 will retake control and return flow to band.** * * * * Note:* * Resetting AFW isolation allows operator to go \< 550 gpm but APC-2 will return flow to ≤ 605 gpm (640 gpm - 35 gpm B/D) once operator releases sw. or full open reached.*

Answer 171

* _APC-1s and APC-2s:_* * *DP1201 - DP1204** * _DPUs:_* * *DP001/DP002** * _Plasma Displays:_* * *DP001/DP002** * _Demultipliers:_* * *DP005** * CP002/CP018/ASP* * _RPU-N:_* * *DP006**

Answer 172

* _First Pump:_* * *10 sec after start, Discharge MOV opens to 40%** * _Second Pump:_* * *10 sec after start, 2^nd Pump's Discharge MOV fully opens** **Once 2^nd Pump's Discharge MOV is 35% open, 1^st Pump's Discharge MOV fully opens** * _Third / Fourth Pump:_* * *10 sec after start, Discharge MOVs fully open** * * * Pump trips: * Discharge MOV _NOT_ moving after 24 sec * Discharge MOV _NOT_ 35% open in 32 sec

Answer 173

* _1 Sec:_* * *480 V Buses** * _15 Sec:_* * *RCFC (11/12)** * _20 Sec / 25 Sec:_* * *CCW / ECW** * _30 Sec:_* * *AFW** * _35 Sec:_* * *CR / EAB HVAC (Emergency MODE)** * *Essential Chilled Water Pump** * *Standby Essential Chiller** * _240 Sec:_* * *Running Essential Chiller(s)** * _280 Sec:_* * *Sequence Complete** * * * * Note:* * Can manually initiate with unlabeled shielded red pushbutton on CP003.*

Answer 174

* _T_error = (T_ref - T_avg) + (Turb Load - NI power)_* * *T_ref → Turbine Impulse Pressure (PT-505)** * *T_avg → Auctioneered High T_avg (T-412A/422A/432A/442A)** * *Turb Load → Turbine Impulse Pressure (PT-505)** * *NI Power → Auctioneered High PR NIs (NI-41/42/43/44)** * * * * _Turbine Load - NI Power Portion:_* * *Used for fast response during transients / load stability** * *Passes through Rate comparator** * Rate of change produces error output* * _Steady state results in no output_* * * * Note: T_error meter on CP005

Answer 175

* _Auto Start:_* * *Trip of SGFPT** * _Start Permissives:_* * *SUFW Lube Oil Pressure \> 5 psig** **Suction Pressure \> 180 psig** **Suction Valve (FW-0517) Open** **NPSH Pressure \> 80 psid** * *No FW Isolation Signal** * _P-14 or SI ONLY_* * * * On Pump Start: * Releases discharge non-return valve (_DOES NOT OPEN DISCHARGE MOV_) * Recirc valve starts to modulate (3300 gpm - 7000 gpm) * Secures aux seal cooling pumps * * * *Note: By procedure, a SUFW will have it's discharge MOV already open*

Answer 176

* *CI Φ_A** * *High Energy Line Break** * 112.7 ˚F [1/8] in MAB room shuts associated valve*

Answer 177

* _Processing:_* * *LWPS (RT-8038)** * Recircs back to WMTs (FV-4077)* * *BRS (RT-8037)** * Sends to feed demins* * *GWPS (RT-8032)** * Isolates Discharge (Closes Discharge, inlet, BRS Vent, and secures bellows compressor)* * _Secondary Plant:_* * *TGB Sump (RT-8041)** * Stops Sump Pump* * *CPS (RT-8042)** * Isolates Neut Basin (Closes discharge Valve)* * *SGBD (RT-8043)** * Isolates Neut Basin (Closes discharge Valve)* * _HVAC:_* * *Containment Purge (RT-8012/RT-8013)** * CVI [1/2]* * *CR/EAB HVAC (RT-8033/RT-8034)** * Emergency Mode* * *FHB HVAC (RT-8035/RT-8036)** * Filtered Exhaust*

Answer 178

* *Containment Pressure (PT-937)** * Used for Containment Spray* * Containment Pressure - High 3 (9.5#) [2/4]*

Answer 179

* *PRT** * *Cavity Drain** * *SI Accumulator Drains** * *RCS Loop Drains** ## Footnote * * * * Note:* * RCDT Pump will auto stop on Flow - Low 2*

Answer 180

* _PCV-655A:_* * *Master Pressure Controller** * 87.5% (≈ 2335 psig)* * _PCV-656A:_* * *Backup PZR Pressure Channel** * 2335 psig* * * * * Note:* * *Only odd numbered channels can be selected as the “controlling channel” to input to the master pressure controller. (455/457)* * *Only even numbered channels can be selected for backup control, and they only input to PCV-656A (456/458)* * *Switch on CP004*

Answer 181

**2335 psig** * * * * PCV-655A: E1A11 * PCV-656A: E1B11 * Block valves are Class 1E 480V. Both PZR PORVs _AND_ Block valves required to be OPERABLE in MODES 1-3 (LCO 3.4.4) * * * * Note:* * Relieves to PRT*

Answer 182

* *114%** * 100% speed is 3600 RPM* ## Footnote * * * Manual linkage reset after mechanical overspeed (4100 RPM) * * * *Note: Trip pushbutton on CP006/ASP is an electrical overspeed.*

Answer 183

**2 ECCS trains injecting into Hot Legs** **1 ECCS train injecting into Cold Leg** **LHSI and HHSI mini-flow valves closed** **Taking Suction from Emergency Sumps** * * * HHSI and LHSI are operated together. Never align HHSI to Hot leg and LHSI to Cold leg or vice versa. * * * * Note:* * Cold Leg Recirc is the exact same except all 3 ECCS trains injecting into cold legs.*

Answer 184

* *CI Φ_A** * *_WITH_** * *Charging Header Pressure - Low (≤ 560 psig)** * Indicated on CP004 (PT-204)* ## Footnote * * * *Note: Holding switch on CP004 in "OPEN" position will override auto closure signal and allow valve to stay open.*

Answer 185

**Closes Inlet/Outlet valve for respective string** **Opens Bypass MOV** **Trips associated LPHD Pump** * * * Relays for automatic High level actuation comes from LPHD pump control power. **_NO AUTO FEATURES FOR FW HTRS 13/14_** * * * *Note: Anticipated following a Rx Trip*

Answer 186

**OLACW** **CWS** * * * Activity - High on RT-8038 will terminate discharge (FV-4077) and send water back to respective WMT. (Long path recirc)

Answer 187

**4^th Stage Extraction: FWH 11A/11B** **Exhaust: DA (FWH 12)**

Answer 188

**660 RPM** 110% ## Footnote * * * Shuts off fuel _AND_ isolates intake air (S/D Butterfly Valve)

Answer 189

**1.5 Hours**

Answer 190

**Boron Recycle Holdup Vent Pressure - Low** **Bellows Compressor Leak** **Inlet Pressure - High** **System Flow - High** * *Room H₂ - High (4)** * 87.5% of lower flammability limit* * *O₂ - High** * 20% of scale (1%)* * *Outlet Radiation - High (RT-8032)** * Adjacent-to-line gamma scintillation detector* * * * Closes system inlet (FV-4657), outlet (FV-4671), Boron recycle tank vent (FV-4651), and secures bellows compressor. * * * * Note:* * Two radiation detectors in system (RT-8031/8032). **_Only RT-8032 will shutdown system._***

Answer 191

**Low pressure N₂** **PRT** **RCDT** **LWPS Waste Evaporator** **BRS Recycle Evaporator** **BRS Recycle Holdup Tanks** **VCT** **Rx Head Degassing Tank**

Answer 192

* _Start Permissives:_* * *Discharge Valve Closed** * No Automatic Actions* **Recirc Valve Closed** *Opens and begins modulating on pump start Shuts when pump secures [5 sec TD]* **Suction Valve Open** **Adequate NPSH** * _Trips:_* * *Low NPSH** * Low D/P* * * * _NO AUTO STARTS_ * * * *Note: Controlled from CP008*

Answer 193

**SI** ## Footnote * * * Will not trip the pumps Valves will fail close on loss of IA or DC control power. * * * * Note:* * Controlled on CP001*

Answer 194

**1225 psig (± 7 psig)** * * * * Used to Cooldown plant when condenser not available * _After a Rx trip, T_avg will stabile at 571 ˚F._ * _With the condenser available (Steam Dumps), T_avg will stabilize at 567 ˚F_ * All four PORVs together have capacity of 25% (6.25% each) * * * *Note: Relieves to atmosphere (Roof)*

Answer 195

* *All 3 CCW pumps start** * 20 Sec on ESF DG Sequencer* * Will start even if switches on CP001/CP002 are in off* **Isolates non-ESF loads** * *Aligns CCW to RCFCs** * Secures RCB Chill Water* * *Opens RHR HX outlet valves** * CCW Min Flow requirements* * * * * Note:* * Must re-align cooling to SFP HXs in 2.5 hrs.*

Answer 196

* *CVI** * Will be defeated in "Defeat All" Position* * *COMS** * LTOP Relief* **PZR PORVs** * *PZR Level - Low (17%)** * Letdown Isolation* * *VCT Level - Low (3%)** * Swapover to RWST* * *Boric Acid Tank Level - Low 2 (29,584 gal)** * Isolates Purification* * *RHR Flow - Low (925 gpm [5 sec TC])** * Trips RHR pump* * *SI Auto Recirc** * LHSI / HHSI takes suction on containment sump vice RWST*

Answer 197

**Discharge Column filled\*** * *Seal Pressure \> 30 psig** * \< 50 psig starts standby pump* **Discharge Valve Closed** **\> 5 mins since last CW pump start** * * * Can use Jet pump to draw air and moisture out of CW discharge column. * Uses screen wash header as prime water

Answer 198

**^{Desired Pressure}/_{Span of PI-557}\*10** ## Footnote * * * ^{1185 psig}/_{1400 psig} \*10 = 8.46 turns

Answer 199

* _P-14:_* * *Reset SI/P-14 (CP006) w/ P-4 False** * *Reset FW Cont & Bypass Valves (CP006)** * *FW Isolation Switches to "Open" (CP006)** * Allows control of PBVs, FWIVs, and FWIBs* *_SI:_* **Reset SI (CP001)** **Reset SI/P-14 (CP006) w/ P-4 False** **Reset FW Cont & Bypass Valves (CP006) FW Isolation Switches to "Open" (CP006)** *Allows control of PBVs, FWIVs, and FWIBs* * _P-4 w/ T_avg Low (574 ˚F) [2/4]:_* * *Reset Low T_avg(CP006)** * Resets all valves except MFRVs* * *FW Isolation Switches to "Open" (CP006)** * Allows control of PBVs, FWIVs, and FWIBs* * *P-4 must be False to operate MFRVs**

Answer 200

* _Supply:_* * *Downstream of Regen HX (IRC)** * RHR Train "A" _AND_ Train "B"* * _Return:_* * *Upstream of VCT** * RHR Train "A" ONLY* * * * Low Pressure Letdown: * All letdown orifices open * RHR pump not required to be running * PCV-135 able to maintain ≈ 380 psig

Answer 201

**RTP** **Feedwater Flow** **Blowdown Flow** **SGWL** **T_avg**

Answer 202

* *RCS \> 150 ˚F** * Must be placed in operation at 350 ˚F* ## Footnote * * * 2 of 3 required for operation. Power Supply: MCC 1A5/1B5/1C5 * * * *Note: Designed to keep CRDM insulation \< 392 ˚F.*

Answer 203

* _POSSUM:_* * *_P_/A Converter** * *Bank **_O_**verlap Unit** * ***_S_**tep Counters** * ***_S_**lave Cyclers** * ***_U_**rgent Failures** * ***_M_**aster Cycler** ## Footnote * * * Located on CP005.

Answer 204

**Gives more uniform reactivity rate** * * * * Used for the control banks _ONLY_. * S/D banks not overlapped b/c they will not be used while critical. * * * * Note:* * The bank selector switch must be in Auto or Manual to maintain bank overlaps during rod movement.*

Answer 205

* _Water Volume:_* * *8800 gal - 9100 gal** * _Boron Concentration:_* * *2700 ppm - 3000 ppm** * * * LCO 3.5.1 Accumulators Applicable: MODES 1 - 3

Answer 206

* _Normal:_* * *Well Water** * _Alternate:_* * *Unit 2 ECW Sump via ECW 2A return line** * * * * Unit 1 Sump is normally aligned to Unit 1 CW Return. * Unit 2 Sump can be aligned to **Unit 1** CW Return. * * * * Note:* * ECW Sump located on MAB 10' in Essential Chiller Train C Room.*

Answer 207

**700 psig** * * * Relieves to Containment Atmosphere * * * * HHSI Discharge Relief (1750 psig) → PRT * LHSI Discharge Relief (600 psig) → PRT

Answer 208

*_Turbine Trip (C-8):_* * *High 1: T_avg - T_ref \> 13 ˚F** * Trips open steam dump banks 1 and 2* * *High 2: T_avg - T_ref \> 26 ˚F** * Trips open steam dump banks 3 and 4* **No Deadband** * * * *_Load Rejection (C-7):_* * *High 1: T_avg - T_ref \> 7.41 ˚F** * Trips open steam dump banks 1 and 2* * *High 2: T_avg - T_ref \> 11.81 ˚F** * Trips open steam dump banks 3 and 4* **Setpoint changes based on chart** * *3 ˚F deadband at 592 ˚F T_avg** * Allows Rods a chance to fix deviation* * * * _Active in T_avg MODE only._ * * * * Note:* * *T_avg driven off Auctioneered High T_avg* * *T_ref driven of PT-505*

Answer 209

* *Sample flow passes across filter paper** * Suspends radioactive particles* **_Beta Scintillation_ detector checks paper for _airborne_ _contamination_** * *Remaining gasses pass charcoal filter** * Removes Iodine and Noble Gas* **_Gamma Scintillation_ Detector checks _Iodine_** **_Beta Scintillation_ Detector checks _Noble Gas_**

Answer 210

* _1 Sec:_* * *480 V Buses** * _6 Sec / 10 Sec:_* * *HHSI / LHSI** * _15 Sec:_* * *Containment Spray** *(1st Try)* * *RCFC (11/12)** * _20 Sec / 25 Sec:_* * *CCW / ECW** * _30 Sec:_* * *AFW** * _35 Sec:_* * *CR / EAB HVAC (Emergency MODE)** * *Essential Chilled Water Pump** * *Standby Essential Chiller** * _40 Sec:_* * *Containment Spray** *(2nd Try / Locks in)* * _240 Sec:_* * *Running Essential Chiller(s)** * _280 Sec:_* * *Sequence Complete**

Answer 211

**Data A _AND_ Data B failure** **Detector Failure** **Control Unit Failure** * * * Generates a RPI Trouble Alarm (CP005) and General Warning.

Answer 212

* _≥ P-11:_* * *Steam Pressure - Low (735 psig) [2/3 on 1/4]** * _\< P-11:_* * *Steam Pressure Rate - High (100 psig w/ 50 sec TC) [2/3 on 1/4]** * _No Permissive:_* * *Containment Pressure - High 2 (3.0 psig) [2/3]** * *Manual [1/2] (CP005/CP006)** * * * P-11: PZR Pressure \< 1985 psig [2/3] Resets located on CP005/CP006. * * * * Note:* * Isolates MSIVs and MSIV bypass valves.*

Answer 213

* _Unit 1:_* * *Y510 / Y520** * _Unit 2:_* * *Y590 / Y600** * * * Isolates the Main Transformer from the switchyard. * * * * Note:* * Visual Indication on CP007 _AND_ CP010. Operable from CP007 ONLY.*

Answer 214

* _0 RPM - 1700 RPM:_* * *Governor Valves full open** * *Throttle valves control speed** * _1700 RPM - 1800 RPM:_* * *Throttle valves full open** * *Governor valves control speed** * * * Governor valves open in a 2, 3, 1, 4 pattern to minimize stress on the HP turbine 1st stage.

Answer 215

* _APC-1:_* * *DPU Data is lost** * _APC-2:_* * *Flow Control Valves fail As-Is** * *Flow indicators will read 0 gpm** * On CP006 and QDPS* * * * * Can still be controlled in manual if APC-2 lost. * Controlled from upper section of APC-2.

Answer 216

* *RCB Atmosphere (RT-8011)** * Will isolate on CVI* ## Footnote **Containment Purge (RT-8012/8013)** **RCB PAMS (RT-8050/8051)** **RCB Area (RT-8052 - 8056)** **Refueling Bridge (RT-8099)**

Answer 217

* _Channels 1 and 3 of Logic R:_* * *DP1201 / DP1203** * *E1A11** * (125 VDC for shunt trip)* * _Channels 2 and 4 of Logic S:_* * *DP1202 / DP1204** * *E1B11** * (125 VDC for shunt trip)* * * * Rectifies 120VAC from DP1201 - DP1204 to 48 VDC and 15 VDC. * * * * Note:* * *DP1201 supplies Actuation Train A* * *DP1203 supplies Actuation Train B* * *DP1204 supplies Actuation Train C*

Answer 218

* _Manual:_* * *0 RPM - 5700 RPM** * _SG Level Control:_* * *3300 RPM - 5600 RPM** * * * SG Level Control: * D/P= FW Pressure - Steam Pressure * Reference D/P 0%: 65 psid * Reference D/P 100%: 169 psid * * * *Note: Whichever controller is lower is the one that has control of speed.*

Answer 219

**Essential Chillers** * _ESF DGs:_* * *Jacket Water HX** * *Turbo Charger Combustion Air Cooler** * *Lube Oil HX** * _CCW:_* * *CCW HX** * *CCW Pump Supplementary Cooler** * Cools area cooler and CCW pump motor*

Answer 220

**HHSI Mini-Flow Valves (MOV-011/MOV-012)** **LHSI Mini-Flow Valves (MOV-013/MOV-014)** **RWST Outlet Valves (MOV-001)** * * * To manually open Emergency Sump Outlet Valve: * RWST Outlet Valve closed (Manual Only) * HHSI Mini-Flow Valve closed [1/2] * LHSI Mini-Flow Valve closed [1/2]

Answer 221

* *RHR HX** * *RCP Thermal Barrier** * *Letdown HX** * *Excess Letdown HX** * *RCDT HX** * *Primary Sample Coolers** * *SFP HX**

Answer 222

* _APC-1:_* * *Data will not be available on DPUs** * _APC-2:_* * *Fails closed** * When power returns, valve shifts to manual w/ a setpoint of 1225 psig* * * * * Can operate SG PORVs locally when APC-2 lost by manipulating 2 valves on actuator assembly. * Controlled from upper section of APC-2. * * * * Note:* * *If power to ESF MCC's are lost, place associated SG PORVs in manual, close the SG PORVs, and dispatch operator to place station blackout power bypass sw. to bypass.* * *This returns control back to MCR.* * *Train "A" MCCs power SG PORV hydraulic pumps A and D.*

Answer 223

**\< 100 ˚F** ## Footnote * * * Lube Oil Temperature of \< 100 ˚F will also make the ESF DG INOPERABLE

Answer 224

**100 psig** ## Footnote * * * Normally pressurized with 3 psig N₂.

Answer 225

* _Source Range:_* * *BF₃ proportional counter** * _Intermediate Range:_* * *Compensated Ion Chamber** * _Power Range:_* * *Uncompensated Ion Chamber** * _Extended Range:_* * *Fission Chamber** * * * Accurately measures neutron leakage up to 120%.

Answer 226

* _Source Range:_* * *Neutrons and gammas interact with BF₃ gas** **Neutron pulse is 10x greater than gamma pulse** * _Intermediate Range:_* * *Outer Can lined with B-10, Inner can is not** **Outer can detects neutrons and gammas** **Inner can detects gammas only** * * * Power range doesn't need to be compensated b/c detector has low sensitivity to gammas b/c low BF₃ gas volume.

Answer 227

**Starts self cleaning strainer motor** * *Starts to Open Discharge Valve after 10 sec** * If not open (95%) after 25 sec, pump trips (N/A for SI)* **Opens chemical injection valve for associated bay** * *Opens Blowdown Valves (N/A for train 2A)** * Maintain CP002 switches in CLOSE so doesn't really happen* * *Starts ventilation fans** * Must be manually secured* * * * * Discharge Valve MCC switch in local prevents discharge valve opening when ECW pump starts. * Self Cleaning strainer does not have switch in MCR. * * * * Note:* * Discharge valve will shut 2 mins after ECW pump secures to prevent draining ECW piping to ECW pond and thus preventing water hammer on pump S/U.*

Answer 228

**≤ 110 ˚F** ## Footnote * * * Determined by looking at running RCFC inlet temperatures.

Answer 229

* _Defeat PT-505:_* * *PT-506 used for C-5 interlock** * _Defeat PT-506:_* * *Nothing** * * * C-5: Turbine Impulse pressure \< 15% [1/1] * Stops _AUTO_ outward rod motion.

Answer 230

**Letdown HX Discharge Temp - High (137 ˚F) _OR_ BTRS Demin Inlet Temp - High (157 ˚F)** ## Footnote * * * Located on CP004 * * * * Note:* * Loss of Air/voltage fails to divert.*

Answer 231

* _SI signal still active:_* * *Pull to lock** * Set / Reset → Set is dominant so SI reset will _NOT_ work* * _SI signal clear:_* * *Reset SI** * (CP001)* * *Reset sequencer** * (CP003)* * *Stop equipment** * Latch/ Reset → Reset is dominant so SI reset will work* * * * If SI signal comes back, SI equipment will restart if not in pull to lock.

Answer 232

**MCC 1A5** **MCC 1G8 (TSC DG)**

Answer 233

**Crossover Steam Pressure \< 15% _AND_ Turbine Speed \> 600 RPM** * * * * Maintains spray pressure 116 psig (40 gpm) * Alarm set at 175 ˚F * * * *Note: Controlled on CP007*

Answer 234

**2500 ppm** ## Footnote * * * Basis: Need 2200 ppm to maintain k_eff \< 0.95 during a DBA of loading fuel in the wrong spot. 2500 ppm provides extra margin.

Systems Flashcards

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