Circ Water

Question 1

Unit 1 is operating at rated power at 200 EFPD. A condenser tube rupture occurs. The four available condensate demineralizers have been placed in service. CDN-PDV-195 is still open. SG Sodium, based on the inline monitor, indicates 800 ppb and rising rapidly. Based on these conditions, the operations crew should:

A. conduct a controlled downpower.
B. initiate a manual RPCB (LOFP).
C. trip the reactor and enter standard post trip actions.
D. take manual control of the controller in order to close CDN-PDV-195.

Answer 1

Answer: C

Question 2

Which one of the following describes why we place enough demineralizer beds in service to get the demineralizer bypass valve closed during a condenser tube rupture?

A. Provide the maximum amount of condensate for cleanup.
B. Evenly distribute the impurities to all demineralizer beds.
C. To minimize the amount of contaminants we put into the steam generators.
D. Reduce the differential pressure across each individual demineralizer bed.

Answer 2

Answer: C