NC

Question 1

What are the NC priority loads

Answer 1

• RCP’s
• CEDM normal ACU
• Normal chillers
• Nuc sample coolers

Question 2

What are the NC non-priority loads

Answer 2

BEAN LAWGS

• BAC
• Evap
• AS vent condenser
• Non-nuc sample coolers
• Letdown HX
• AS Rad monitor
• Waste gas compressors
• SFP HX (can be supplied by EW)

Question 3

What is the NC Rad monitor

Answer 3

• RU-6 - Normal
• If x-tied to EW RU-2 or 3 since Rad monitor is not in
  loop

Question 4

What will auto start the STBY NC pump

Answer 4

79 psig HEADER pressure

Question 5

What is normal NC temperature

Answer 5

• 75-105*F

- maintain <85*F for RCP bearing cooling

Question 6

What are the makeup sources for the NC surge tank

Answer 6

• DW

- CWHUT

Question 7

What is the max NC flow to the LD HX

Answer 7

1500 gpm

due to vibration damage >1800gpm

Question 8

How long until RCP seal damage occurs on a loss of NC

Answer 8

With Seal Injection - 10 minutes

W/out Seal Injection - 3 minutes

Question 9

What will cause NC containment isolation vlv to auto close

Answer 9

CSAS

Question 10

What is the purpose of the 2 NC system reliefs inside of containment

Answer 10

• 135 psig
• ensure closure capability of NC cntmt isolations
  during a HP seal cooler leak

Question 11

What will cause an Amber light for NC pumps

Answer 11

• STBY pump starts
• Local start of STBY pump

any condition that causes STBY pump to run while CR HS is green flagged

Question 12

What are the NC pump power supplies

Answer 12

A - NBN-S01

B - NBN-S02

Question 13

What NC vlv must be operated when x-tying EW-NC

Answer 13

Close NC-99 to separate non-priority loads

Question 14

What in field action is required when x-tying EW - NC

Answer 14

Throttle SDC HX outlet vlv until RCP flow alarms clear

Question 15

What is the cooling capacity of the PW-T mod

Answer 15

• 2 chillers at 50%
• Evap at 50%
• BAC at 40%
• 1 SFP HX
• AS vent condenser

Question 16

What will cause the EW x-tie vlvs to AUTO close

Answer 16

Only Train A, B vlvs are manual

• SIAS (override)
• EW A surge tank low level 17” (no override)