05000416/FIN-2011007-02
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Finding | |
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| Title | Failure To Assure Equipment Required For Postfire Safe Shutdown Was Protected Against Fire Damage |
| Description | The team identified a noncited violation of License Condition 2.C(41), Fire Protection Program, for failing to assure that equipment relied upon for safe shutdown following a fire in the control room was protected against fire damage. Specifically, Procedure 05-1-02-II-1, Shutdown from the Remote Shutdown Panel, Revision 036, relied on the automatic operation of and indications from the load shedding and sequencing system. The team identified that this system was not isolated from potential damage due to a fire in the control room and the procedure did not adequately address the potential that fire damage to the system could effect the postfire safe shutdown capability by spuriously starting or stopping electric loads. The licensee entered this into their corrective action program as CR-GGN-2011-02721. The failure to assure that equipment required to successfully implement the safe shutdown procedure for a fire in the control room was protected against fire damage is a performance deficiency. The performance deficiency was more than minor because it was associated with the reactor safety mitigating systems cornerstone attribute for protection against external events (fire), and adversely affected the cornerstone objective to ensure the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. Since the finding involved control room evacuation, a Phase 3 SDP risk assessment was performed by a senior reactor analyst. Because a bounding change to core damage frequency was 1.97 x 10-8, and the finding was not significant with respect to large, early release frequency, this finding was determined to have very low safety significance (Green). The finding did not have a crosscutting aspect since it was not indicative of current performance, in that the licensee had established the current procedure more than three years prior to this finding. |
| Site: | Grand Gulf  |
|---|---|
| Report | IR 05000416/2011007 Section 1R05 |
| Date counted | Sep 30, 2011 (2011Q3) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.05 |
| Inspectors (proximate) | N O'Keefe J Mateychick E Uribe B Correll N Okonkwo |
| INPO aspect | |
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Finding - Grand Gulf - IR 05000416/2011007 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Grand Gulf) @ 2011Q3
Self-Identified List (Grand Gulf)
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