NESW

Question 1

What are the NESW pump trips?

Answer 1

• Overload- Overcurrent- Load Shed (Seq back on)- Load Conservation (CTS)

Question 2

What NESW pump autostarts do you get when the switch is in Auto?

Answer 2

• Low Header Pressure 55 psig (60 psig U2) (only when control switch in Auto)- SI- Load Shed

Question 3

Do the NESW pump discharge valves auto open on a manual start signal?

Answer 3

• No, they have no auto features, must be manually opened after pump start

Question 4

If the NESW pump switch is in auto, how must the discharge valve be arranged?

Answer 4

• It must be open, since it does not auto open on its own when the pump starts.

Question 5

How soon after a Load Conservation can a NESW pump be restarted and how is it done?

Answer 5

• It can be restarted after 75 secs by taking the pump switch to trip/lockout and back to on/run

Question 6

What are the NESW pump suction sources?

Answer 6

Both Units: -CW Intake Tunnel (Normal) -Discharge Tunnel (Alt)

Question 7

What are the NESW pump power supplies?

Answer 7

• 11/21C (N NSEW Pump)- 11/21B (S NESW Pump)

Question 8

Which NESW header has the glycol loads on it?

Answer 8

• NESW Miscellaneous Header

Question 9

When does WMO-906 (NESW Misc header supply valve) auto close?

Answer 9

• On a Load Conservation

Question 10

At what DP do the NESW Duplex strainers auto backwash at?

Answer 10

• 76” H20

Question 11

When do both units NESW Duplex Strainer backwash alarms come in?

Answer 11

95” H20 - Unit 197” H20 - Unit 2

Question 12

What does T.S. 3.6.3 B (Cnt Isolation Valves) state?

Answer 12

If 2 CIV’s are inopWITHIN 1 hr:- Isolate penetration

Question 13

Which valves isolate on a load shed in the NESW system and why?

Answer 13

L.O. cooler WRV’s close:- maximizes flow the PAC, CAC, CLVs (If in Open Loop) - lowers load on EDG by lowering load on NESW

Question 14

Which unit’s NESW supplies the Seal Oil Coolers?

Answer 14

• Unit 2

Question 15

Which unit’s NESW supplies the TSC Air conditioning?

Answer 15

• Unit 1

Question 16

When does the NESW header supply the Containment vent units, blowdown heat exchanger and blowdown sample heat exchanger?

Answer 16

• When Containment Chill water is in Open Loop.

Question 17

What loads are on the NESW Misc Header?

Answer 17

• Glycol Chillers- Ice Bin Cooling- Fluidizer Chiller Cndnsrs- Fluidizer Air Precoolers- Chem Cleaning Mix Tank- MUP- PHB BD Tank- Misc Sealing and Cooling- TRS Neutralization Ring Header

Question 18

What is cooled by the NESW Norm Header?

Answer 18

• TSC Air Conditioning (U1)- Seal Oil Coolers (U2)- EHC Skid- MTLO Tank Coolers- MFP LO Coolers- PAC- CAC- Conductivity Room Sample- CHW Plate HX- CHW Solid Separators

Question 19

What NESW pump autostarts do you get when the switch is in neutral?

Answer 19

• Load Shed- SI

Question 20

What is the most important load on the NESW Misc Header?

Answer 20

• Glycol Chillers

Question 21

What has to be done in order to reset the Lube Oil Cooler WRVs after a load shed?

Answer 21

• All WRV Controllers have to be taken to minimum before you can push the reset button to get them to reset

Question 22

When do the LO Cooler WMOs get a close signal and when can they be operated after?

Answer 22

Load Conservation, they can be operated 75 sec after a load con

Question 23

Which Containment Isolation Valves don’t isolate on a Load Conservation?

Answer 23

• CLV Units

Question 24

Which Containment Isolation Valves isolate on a Load Conservation?

Answer 24

• CIR Vent Units- CUV Units- RCP Motor Air Coolers

Question 25

Where is the NESW Header Pressure sensed?

Answer 25

- Downstream of the Strainer but before the Discharge check valve

Question 26

What is the Power Supply to the NESW Motor outlet Valves?

Answer 26

600v AC

Question 27

What is the Power Supply to the NESW Strainers?

Answer 27

600v AC

Question 28

What occurs in the NESW Sys on a Load Conservation?

Answer 28

- Lube Oil Motor Op Valves (WMO’s) Automatically Close- NESW (inlet) CIV’s Automatically close: for CUV’s IR Vent Units, and MAC’s- Unit Crosstie Valve to Misc Header automatically closes (ie. Glycol)- NESW Pp trips W/CTS signal (Can be restarted after 75 sec by going to Trip/Lockout)

Question 29

What occurs in the NESW System on a Loadshed?

Answer 29

- NESW Pp trips and Seq back on- L.O. cooler (WRV’s) close:which maximizes flow the PAC, CAC, CLVs - lowers load on EDG by lowering load on NESW

Question 30

Which Containment NESW Load(s) DO NOT have Backup Air Bottle(s) for the CA to the NESW Cntmt Isol Vlv(s)?

Answer 30

RCP Motor Air Coolers CIVs

Question 31

IF you have a CTS, then reset SI, NESW pumps which were NOT running prior to event will?

Answer 31

Restart unless locked out.