CVCS (Seal Injection / Seal Return)

Question 1

Limits on RCP seal flow

ITS, Normal, Expanded

Answer 1

• ITS limit: >6gpm
• Normal Band: 8-13gpm
• Expanded Band: 6-20gpm (Used during transients)

Question 2

Seal flow adjusted by?

Answer 2

-CVC-297 “A,B,C”

Question 3

CVC-303 A, B, C

Seal Leakoff Vlaves

Answer 3

• Seal return from #1 RCP seals

- Fail open

Question 4

Seal return flow
normal?
max?

Answer 4

• Normal: 9gpm total

- Maximum : 40gpm total

Question 5

CVC-381

Seal Water Return Valve

Answer 5

• Motor operated (powered from MCC-5)

- Shuts on Phase B