Secondary water system

Question 1

Basis for minimum CST level:

Answer 1

Maintain the RCS at hot standby conditions for 2 hours followed by a cooldown to RHR conditions at 50F/hr followed by a period not longer than one-hour to allow warmup of the RHR pumps prior to placing the RHR system into service in shutdown cooling mode.

Question 2

A MCB alarm will occur if either the ____ or the _____ are not fully closed.

Answer 2

Emergency overflow or emergency makeup valves are not fully closed

Question 3

Emergency makeup to hotwell ___
Normal makeup to hotwell____
Normal overflow to CST____
Emergency overflow to CST____

Answer 3

7”
14”
21”
32”