Containment Spray

Question 1

Unit 1 is operating at rated power. An inadvertent Train A CSAS occurs. Based on these conditions, what actions, if any, are necessary to maintain the RCPs operating?

A. No actions should be necessary, since the CSAS is only Train A.
B. Cross-tie Essential Cooling Water with Nuclear Cooling Water.
C. Override and open NCA-UV-402, outside containment isolation valve on the NC return header.
D. Locally open NCA-UV-402, outside containment isolation valve on the NC return header.

Answer 1

Answer: C

Question 2

An inadvertent containment spray actuation, CSAS, occurs. The operator places both Containment Spray Pump hand switches in the stop position and overrides and closes both containment spray valves. The reactor trips and a valid Safety Injection Actuation Signal SIAS is received. Which one of the following is correct concerning starting the CS pumps?
A. Reset and then re-initiate CSAS.
B. Place the CS pump handswitch to START twice.
C. The CS pump control power must be cycled.
D. Place the CS pump handswitch to START once.

Answer 2

Answer: B

Question 3

The Containment Spray System is designed such that the peak Containment pressure following a design basis event be reduced by at least _______of its original value in less than _____ hours.

A. 75%, 24
B. 50%, 12
C. 75%, 12
D. 50%, 24

Answer 3

Answer: D