40AO-9ZZ03 Loss of Cooling Water

Question 1

When does the PW pump Auto start

Answer 1

• 40 psig discharge pressure

Question 2

What is required if PW is NOT restored

Answer 2

Trip the Reactor

Question 3

What is required if TC is NOT restored

Answer 3

Trip the Reactor

Question 4

How do we minimize loads on TC

Answer 4

• Stop SGBD
• Align AFW
• Trip both MFP’s
• Stop HDP’s
• Stop CD pumps (MFP’s not running)
• Stop Service air compressor/ IA compressor
• Use SBCV’s 1007/8
• Break vacuum when MT<1200 rpm
• Stop CW pumps
• Stop EHC

Question 5

How long do we have to restore NC flow to RCP’s

Answer 5

• 3 minutes without seal injection

- 10 minutes with seal injection

Question 6

What is required if unable to restore cooling to RCP’s

Answer 6

• Trip the Rx
• Stop all RCP’s
• Isolate Seal Bleedoff

Question 7

What are the actions for a NC leak inside containment

Answer 7

• Close NC CIV’s BEFORE TRIP
• Trip the Rx
• Stop RCP’s
• Isolate Bleedoff

Question 8

When cross connecting EW to NC how far do you throttle SDC HX outlet vlv

Answer 8

• RCP low NC flow alarm clears (>450 gpm)

- EW system flow <8500 gpm

Question 9

What is the TCA for a loss of cooling to a RCP

Answer 9

30 Minutes

• Reduce power or isolate cooling water and shutdown RCP
• FSAR time requirement