05000317/FIN-2010007-03
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Finding | |
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Title | Postulated Sinole Spurious Operation Adverselv Affects Credited Onsite Power Source for a Control Room Fire Scenario |
Description | Appendix R to 10 CFR 50, Fire Protection Program for Nuclear Power Facilities Operating Prior to January 1, 1979, Section lll.L.3, requires in part that alternative shutdown capability shall accommodate post-fire conditions where offsite power is not available tor 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />. Contrary to the above, December 17,2010, the NRC identified that CENG did not meet this requirement for the Unit 1 and Unit 2 control room fire areas and failed to maintain the 0C EDG free of the effects during a postulated fire-induced circuit failure. This violation existed since September 11,2001, when procedure instructions were included in AOP-9A, Safe Shutdown Due to a Severe Control Room Fire, Rev. 9, to start the 0C EDG prior to isolating all 0C EDG circuits from the fire area. CENG is in transition to NFPA 805 and therefore the NRC-identified violation was evaluated in accordance with the criteria established by Section A of the NRC's lnterim Enforcement Policy Regarding Enforcement Discretion for Certain Fire Protection lssues (10 CFR Part 50.48) for a licensee in NFPA 805 transition. Specifically, although the NRC identified the violation, it is likely that CENG would have identified and corrected this issue as part of the transition to NRPA 805, CENG implemented compensatory measures in a reasonable time commensurate with the risk significance, the issue was not likely to have been previously identified by routine CENG efforts, and the violation was not willful. Because all the criteria were met, the NRC is exercising enforcement discretion for this issue. |
Site: | Calvert Cliffs |
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Report | IR 05000317/2010007 Section 1R05 |
Date counted | Dec 31, 2010 (2010Q4) |
Type: | Violation: Green |
cornerstone | Mitigating Systems |
Identified by: | NRC identified |
Inspection Procedure: | IP 71111.05 |
Inspectors (proximate) | C Cahill D Orr J Rogge K Young R Fuhrmeister |
INPO aspect | |
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Finding - Calvert Cliffs - IR 05000317/2010007 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Calvert Cliffs) @ 2010Q4
Self-Identified List (Calvert Cliffs)
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