Group Isolations

Group 1 isolation signals?
- -47" RPV
- <= 840# when in Run
- 135-140% steam flow
- 195-200F steam chase temp
- C-15 Group I isolation keylock in TRIP
What is isolated by a Group 1 signal?
- MSIVs (inboards and outboards)
- MSIV drains (MO-2073 and MO-2074)
- Recirc Sample (CV-2790 and CV-2791)
Group 2 isolation signals?
- +9" RPV level
- 1.84# Drywell press
What is isolated by a Group 2 signal?
- RHR/SDC
- TIPS
- Atmosphere sampling
- DW sumps
- N2 purge
Group 2 partial isolation signals?
- -47" RPV level
- 1.84# Drywell press
- RB Rad level 26 mrem
- FP Rad level 50 mrem
What is isolated by Group 2 partial?
- Secondary containment
- Starts SBGT
- Starts EFT
Group 3 isolation signals?
- -47" RPV level
- 1.84# Drywell press
- 460 gpm or -200 gpm for 10 sec
- 170F RWCU room temp
- (SBLC)
What is isolated by a Group 3 signal?
- RWCU
- Recirc sample
Group 4 isolation signals?
- 300,000 lbm/hr for 4 sec
- 187.5F
- 100#
What is isolated by a Group 4 signal?

HPCI
Group 5 isolation signals?
- 44,434 lbm/hr for 5 sec
- 187.5F
- 60#
What is isolated by a Group 5 signal?

RCIC

Author

jasonstone808

99213

Card Set

Group Isolations

Description

Cert Class. Group Isolations

Updated

2011-09-01T15:09:32Z

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