05000275/FIN-2012008-04
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Finding | |
|---|---|
| Title | Failure to maintain the fire protection program design basis documents |
| Description | The failure to maintain the fire protection program design basis documents (e.g., fire hazards analysis, safe shutdown analysis, and thermal hydraulic analysis) and the alternative shutdown procedure to adequately implement the approved fire protection program was a performance deficiency. The performance deficiency was more than minor because it was associated with the protection against external events (fire) attribute of the Mitigating Systems cornerstone and it adversely affected the cornerstone objective of ensuring the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. A senior reactor analyst performed a hand calculation to bound the risk significance of this finding. The senior reactor analyst determined that the change in core damage frequency was less than 1E-4, so the finding was not of high safety significance (Red). Therefore, this finding qualified for enforcement discretion using Section 9.1 of the Enforcement Policy, Enforcement Discretion for Certain Fire Protection Issues (10 CFR 50.48). |
| Site: | Diablo Canyon  |
|---|---|
| Report | IR 05000275/2012008 Section 1R05 |
| Date counted | Dec 31, 2012 (2012Q4) |
| Type: | Violation: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.05 |
| Inspectors (proximate) | S Alferink J Mateychick B Correll N Okonkwo G Miller |
| Violation of: | License Condition - Fire Protection |
| INPO aspect | |
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Finding - Diablo Canyon - IR 05000275/2012008 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Diablo Canyon) @ 2012Q4
Self-Identified List (Diablo Canyon)
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