Systems Flashcards by Catawba Initial License Class

What is P-8 and what does it do?

2/4 Power Range detectors greater than or equal to 48% power.
-Automatically enables the Single Loop Loss of Flow reactor trip above P-8.
-Automatically blocks this trip below P-8.

How well did you know this?

Not at all

Perfectly

What is C-4 and what does it do?

2/4 OPdeltaT channels within 1% of the OPdeltaT reactor trip setpoint.
-Blocks automatic and manual rod withdrawal.
-Actuates main turbine runback at 10%/min until below the setpoint.

How well did you know this?

Not at all

Perfectly

What are the inputs to OPdeltaT and what does it provide protection from?

-Tavg
-Rate of change of Tavg
-AFD

Protects from exceeding KW/Ft

How well did you know this?

Not at all

Perfectly

What is the 1 Loop Loss of Flow Reactor Trip Setpoint?
Can it be blocked?
What is the Bases for it?

-2/3 channels on 1/4 loops less than or equal to 91% NC flow.
-Can be blocked below P-8
-Bases is to provide protection against violating the DNBR limit.

How well did you know this?

Not at all

Perfectly

What is the 2 Loop Loss of Flow Reactor Trip Setpoint?
Can it be blocked?
What is the Bases for it?

-2/3 Channels on 2/4 loops less than or equal to 91% NC flow.
-Can be blocked below P-7
- Bases is to provide protection against violating the DNBR limit.

How well did you know this?

Not at all

Perfectly

What is the OTdeltaT Reactor Trip Setpoint?
Can it be blocked?
What is the Bases for it?

-2/4 Delta T’s greater than or equal to the OTdeltaT setpoint.
-Cannot be blocked
-Bases is to ensure the design limit for DNBR is met.

How well did you know this?

Not at all

Perfectly

What is the main Turbine Trip Reactor Trip Setpoint?
Can it be blocked?
What is the Bases for it?

-2/4 Stop Valve EH pressure switches less than or equal to 550 psig or 4/4 Stop Valves closed.
-Can be blocked below P-9
-Bases is to anticipates the loss of heat removal capabilities of the secondary system following a turbine trip.

How well did you know this?

Not at all

Perfectly

What is the Intermediate Range Hi Flux Reactor Trip Setpoint?
Can it be blocked?
What is the bases for it?

-1/2 Intermediate Range detectors greater than or equal to 25% reactor power.
-Can be manually blocked above P-10
-Bases is uncontrolled rod withdrawal/Startup accident.

How well did you know this?

Not at all

Perfectly

What is the Pressurizer High Pressure Reactor Trip setpoint?
Can it be blocked?
What is the bases for it?

-2/4 Pressurizer Pressure Channels greater than or equal to 2385 psig.
-Cannot be blocked
-Bases ensures protection is provided against over pressuring the NC system.

How well did you know this?

Not at all

Perfectly

What is the Pressurizer Low Pressure Reactor Trip Setpoint?
Can it be blocked?
What is the Bases for it?

-2/4 Pressurizer Pressure Channels less than or equal to 1945 PSIG.
-Can be blocked below P-7
-Bases is to ensure protection is provided against DNBR limit due to low pressure.

How well did you know this?

Not at all

Perfectly

What is the Power Range Positive Rate Reactor Trip Setpoint?
Can it be blocked?
What is the Bases for it?

-2/4 Power Range Channels greater than or equal to +5% in 2 seconds
-Cannot be blocked
-Bases is to ensure DNB protection is provided against rod ejection

How well did you know this?

Not at all

Perfectly

What is P-13 and what does it do?

1/2 Turbine Impulse Pressures great than or equal to 10% power
-Input to P-7

How well did you know this?

Not at all

Perfectly

What is C-1 and what does it do?
Can it be blocked?

-1/2 Intermediate Range Reactor Power greater than or equal to 20% power
-Blocks automatic and manual rod withdrawal.
-Manually blocked above P-10

How well did you know this?

Not at all

Perfectly

What is C-2 and what does it do?
Can it be blocked?

-1/4 Power Range Detectors greater than or equal to 103%-105% Reactor Power.
-Blocks automatic and manual rod withdrawal.
-Can not be blocked

How well did you know this?

Not at all

Perfectly

What is C-3 and what does it do?

-2/4 OTdeltaT Channels within 3% of OTdeltaT Reactor Trip Setpoint.
-Blocks automatic and manual rod withdrawal.
-Actuates main turbine runback at 10%/min until below setpoint.

How well did you know this?

Not at all

Perfectly

What are the inputs to OTdeltaT and what does it protect you from?

_Tavg
-NC pressure
-AFD

Protects from exceeding DNB

How well did you know this?

Not at all

Perfectly

What is P-9 and what does it do?

-2/4 Power Range Detectors greater than or equal to 69% power.
-Automatically enables the reactor trip on turbine trip above P-9.
-Automatically blocks this trip below P-9

How well did you know this?

Not at all

Perfectly

What is the Source Range Hi Flux Reactor Trip Setpoint?
Can it be blocked?
What is the Bases for it?

-1/2 Source Range greater than or equal to 10^5 cps
-Can be blocked manually above P-6, automatically above P-10
-Bases is uncontrolled rod withdrawal/startup accident.

How well did you know this?

Not at all

Perfectly

What is the Pressurizer High Level Reactor Trip Setpoint?
Can it be blocked?
What is the Bases for it?

-2/3 Pressurizer Level Channels greater than or equal to 92% level.
-Can be blocked below P-7
Bases is water through the Pzr safeties (NC system integrity).

How well did you know this?

Not at all

Perfectly

What is the OPdeltaT Reactor trip Setpoint?
Can it be blocked?
What is the Bases for it?

-2/4 channels DeltaT’s greater than or equal to the OPdeltaT setpoint.
-Cannot be blocked
-Bases is protects against excessive fuel centerline temperature (kW/ft).

How well did you know this?

Not at all

Perfectly

What is the NCP Bus Low Voltage Reactor Trip Setpoint?
Can it be blocked?
What is the Bases for it?

-2/4 busses less than or equal to 5082 volts
-Can be blocked below P-7
-Bases is to provide protection against violating DNBR (anticipatory loss of flow)

How well did you know this?

Not at all

Perfectly

What is P-10 and what does it do?

-2/4 Power range detectors greater than or equal to 10% reactor power.
-Input to P-7
-Automatically provides a backup signal to block the Source Range Neutron High Flux Reactor Trip
-Allows manual block of the following above P-10:
-C-1 Rod stop
- Intermediate Range Neutron Flux Reactor Trip
-Power Range Neutron Flux Low Reactor Trip
-Automatically reinstates the C-1 rod stop, Intermediate Range Reactor Trip and Power Range Low Flux Reactor trip below P-10.

How well did you know this?

Not at all

Perfectly

What is the NCP Bus Low Frequency Reactor Trip Setpoint?
Can it be blocked?
What is the bases for it?

-2/4 NCP Bus Frequencies less than of equal to 56.4 hertz.
-Can be blocked below P-7
-Bases is to provide against violating DNBR (anticipatory loss of flow).

How well did you know this?

Not at all

Perfectly

What is the S/G Lo-Lo Level Reactor Trip Setpoint?
Can it be blocked?
What is the bases for it?

-2/4 channels in 1/4 S/G’s less than or equal to 11% unit 1, 37% unit 2
-Cannot be blocked
-Bases is to provide protection against a loss of heat sink and actuates the CA System prior to uncovering the S/G tubes.

How well did you know this?

Not at all

Perfectly

What is the Power Range Low Flux Reactor Trip Setpoint? Can it be blocked? What is the bases for it?

-2/4 Power Range Channels greater than or equal to 25% power -Can be blocked above P-10 -Bases is to provide protection from reactivity excursions from low powers.

What is the Power range Hi Flux Reactor Trip Setpoint? Can it be blocked? What is the Bases for it?

-2/4 Power Range Channels greater than or equal to 109% power -Cannot be blocked -Bases is to provide protection from reactivity excursions from all powers (DNB)

What is P-7 and what does it do?

-P-10 or P-13 -Automatically enables the 5 "AT Power" trips above P-7: - NCP Undervoltage - NCP Underfrequency - NCP 2 loop loss of flow - Pressurizer Pressure - Low - Pressurizer Level - High -Automatically blocks these trips below P-7

What is P-6 and what does it do?

-1/2 Intermediate Range Reactor power greater than or equal to 10^-5% power -Allows manual block of Source Range Neutron Flux Reactor trip above P-6 -Automatically enables Source Range Neutron Flux Reactor trip below P-6

What is the interlock between 1NV-1A & 1NV-2A and 1NV-10A, 1NV-11A and 1NV-13A?

- Cannot close 1NV-1A or 1V-2A with either 1NV-10A or 1NV-11A or 1NV-13A open. -Cannot open 1NV-1A or 1NV-2A with either 1NV-10A or 1NV-11A or 1NV-13A open. -Cannot make or break letdown flow with with 1NV-1A or 1NV-2A.

How much flow does 1NV-11A (Letdown orifice isol) pass?

45 gpm

How much flow does 1NV-13A (Letdown orifice isol) pass?

75 gpm

What signals close 1NV-1A and 1NV-2A?

-Loss of DC power -Loss of air - PZR low level of less than 17% (SPL-1 closes 1NV-2A and SPL-2 closes 1NV-1A)

What signals close 1NV-10A, 1NV-11A and 1NV-13A?

-PZR low level of less than 17% (either SPL-1 or SPL-2 will close all three valves) -If 1NV-1A or 1NV-2A close -Phase "A" Isolation (St) -Both NV pump breakers are tripped -Loss of air -Loss of DC power

At what pressure does 1NV-14 (letdown orifice header relief) lift and where does it relieve to?

-600# -Relieves to the PRT

Per limits and precautions of OP/1/A/6200/001, What is the maximum temperature of water through the NV deminerializers?

145 degrees F

At what temperature does 1NV-153A (letdown HX outlet 3-way valve) divert from the deminerializer to the VCT?

136 degrees F

What is the Tech Spec 2.1.1.1 limit for Departure for Nucleate Boiling Ratio (DNBR)?

DNBR shall be maintained greater than or equal to 1.14.

What are the requirements if DNBR of Tech Spec 2.1.1 is violated?

Restore compliance and be in MODE 3 within 1 hour.

What is the formula for calculating DNBR?

CHF/AHF

What parameters affect CHF?

-NC Flow -NC Pressure -NC temperature

What parameter affects AHF?

-Reactor Power

What are the inputs for LTOP for 1NC32B?

-C Wide Range Pressure -C Tcold temperature

What are the inputs for LTOP for 1NC34A?

-B Wide Range Pressure -D Thot temperature

At what temperature can you select Low Pressure Mode for 1NC-34A and 1NC-32B?

NC Temperature less than 300 degrees F

When 1NC-32B and 1NC-34A are in LTOP mode, what pressure will they lift?

400#

What is the Loss of Load runback rate and where does the Main Turbine runback to on each unit<

-18%/min down to 46% on Unit 1 and 48% on Unit 2

What is the OPdeltaT and OTdeltaT turbine runback rate?

10%/min until the signal clears.

If 1KC-132 (Letdown HX Outlet Temperature Control) fails open, how would Reactor Power change?

Letdown temperature would lower, therefore causing and absorption of boron and reactor power would rise.

What are the steam supplies to Auxiliary Steam?

-Main Steam -'C' Bleed -Other Unit -Aux. Electric Boilers

Where does the P-4 signal go?

-ECCS Reset -FWI with low Tavg -Steam Dumps -Main Turbine trip -CFPT speed control. Must have both trains P-4 to run the CFPT to minimum speed of 2975 rpm.

What is P-14 and what auto actions occur?

-2/4 S/G level on 1/4 S/G's greater than or equal to 83.9% unit 1 and 77% unit 2. -FWI -Main Turbine Trip -CFPT trip

If 1NV-294 and 1NV-309 are in MANUAL and NC pressure lowers, what happens to charging line flow and total seal water flow?

-Charging line flow rises -Total seal water flow rises

At what level does the Unit 1 VCT start to divert?

75%

At what level does the Unit 2 VCT start to divert?

70%

At what level does Unit 1 VCT swap NV pump suction to the FWST?

2/2 VCT levels 4.3%

At what level does Unit 2 VCT swap NV pump suction to the FWST?

2/2 VCT levels 4.0%

At what pressure does the PRT rupture disc rupture?

100#

Per limits and precautions of OP/1/A/6150/004 (Pressurizer Relief Tank), when shall a CR be initiated to evaluate the rupture disc integrity?

If PRT pressure exceeds 50 psig

Per limits and precautions of OP/1/A/6150/004 (Pressurizer Relief Tank), the maximum temperature in the PRT shall not exceed what?

10 degrees F above lower containment ambient temperature.

What signal enables the containment sump swap logic?

If ECCS is reset, does the containment sump swap enable logic clear?

How much mini-flow is provided by 1NV-202B and 1NV-203A?

60 gpm per pump

What Tavg signal goes to the Rod Control System?

Tavg 1

What is required to reset ECCS following an automatic safety injection signal?

- wait 60 seconds -P-4 for train related reset

What is required to reset ECCS following a Manual safety injection?

- wait 60 seconds

What are the emergency D/G trips following and automatic start?

- Low Low lube oil pressure -30 psig -D/G lockout -87G (Generator Differential) or -51V (Generator Voltage Controlled Overcurrent) -Engine Overspeed -115% (517.5 rpm)

What is C-9 and where does it go?

-1/4 RC pump breakers closed -2/2 Cond vacuums greater than 15 inches hg -Goes to the arming circuit for condenser dumps

What color on the OAC represents a suspect value?

Blue

What color on the OAC represents an inserted point

White

What color on the OAC represents a bad point?

Magenta

How many hours must an RO or SRO complete to maintain their license?

60 hours (5-12 hour shifts)

How many hours must an RO or SRO perform to reactivate their license?

40 hours (up to 8 hours can be used for a plant tour)

What position can an RO get credit for when maintaining their license?

BOP or OATC.

What position can an SRO get credit for when maintaining their license?

OATC or BOP or SM or CRS, at least one shift has to be as a CRS or SM.

If DCS has 4 channels of input, which signal does it use?

2nd highest or 2nd lowest (C-16)

If DCS has 3 channels of input, which signal does it use?

Median select

If DCS has 2 channels of input, which signal does it use?

Average of the two

Does DCS send signals to the protection logic?

What occurs on a low inverter output voltage condition on Aux. Control Power Inverters?

Automatic static transfer switch (KXAA, KXAB and KUA) swaps to RDA or RDB.

How is KXAA(KXAB) Automatic Static Transfer Switch returned to normal alignment?

After 60 seconds, the switch will transfer back to the inverter whenever voltage and frequency return to normal.

Following a blackout, how is power restored to Aux Control Power battery chargers 1CCA/1CCB?

Manually after load group 13 is energized

What is the setpoint for a blackout?

2/3 voltages less than 82.9% on ETA(B)

What prevents the sequencer from actuating on a blackout of ETA(B)?

86N, 86S or 86B relay actuated

What is the setpoint for degraded bus voltage?

2/3 voltages less than 90% on ETA(B).

What will give a Phase A?

-Manual pushbutton -Safety Injection signal

What is required to reset Phase A?

Push the Phase A reset pushbutton

What will give a Phase B?

-Manual pushbutton -2/4 containment pressure greater than or equal to 3.0 psig

What is required to reset Phase B?

Push the Phase B reset pushbutton

What gives a Feedwater Isolation?

- Manual pushbutton -Ss signal -P-14 2/4 S/G levels on 1/4 S/G greater than or equal to 83.9% unit 1, 77% unit 2 -2/4 Tave channels less than or equal to 564 degrees F and P-4 train related.

Following an Automatic D/G start, how do the VD fans work?

Emergency Fans will start and the normal fan stops.

Following an Automatic D/G start and the Sequencer is not reset, how will a Cardox actuation affect the VD fans?

Emergency fans will continue to run

Following a Manual D/G start, how will a Cardox actuation affect the VD system?

All fans secure

What are the inputs to 'B' ICCM?

B ICCM is (BCAB) C WR Pressure A Thot B Thot

What are the inputs to 'A' ICCM?

A ICCM is (ABCD) B WR Pressure C Thot D Thot

An open RTD detector will higher or lower than normal?

higher

If using S/G PORVs in Manual and get an automatic Main Steam Isolation, what happens to the S/G PORVs?

The control for the S/G PORVs will revert back to AUTO and the S/G PORVs will close.

If using the S/G PORVs in Manual and a Manual Main Steam Isolation is initiated, what happens to the S/G PORVs

If a Manual Main Steam Isolation signal is initiated with the S/G PORVs in manual, the PORVs will stay in manual and will not close.

If using S/G PORVs in Manual and get an automatic Main Steam Isolation, what happens to the S/G PORVs?

The S/G PORVs will close and remain closed until the SM Isolation is "RESET" and PORV "RESET" is depressed for train A & B.

Does the Main Steam Isolation signal need to be reset to use S/G PORVs in Manual.

No, going to Manual will allow opening the S/G PORVs with an Main Steam Isolation still present.

If operating the S/G PORVs from the Aux shutdown panel, what provides the motive force for positioning the PORVs?

VI (Instrument air)

If operating the S/G PORVs in Automatic, what provides the motive force for positioning the PORVs?

VI (Instrument air)

If operating the S/G PORVs in Manual, what provides the motive force for positioning the PORVs?

VI (Instrument air) or N2 (Nitrogen) whichever is at a higher pressure.

Systems Flashcards

(102 cards)