05000317/FIN-2011004-03
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Finding | |
|---|---|
| Title | Failure to Identify Pressurizer Safety Valves Condition Adverse to Quality |
| Description | The inspectors identified an NCV of 10 CFR Part 50, Appendix B, Criterion XVI, Corrective Actions, because Constellation did not promptly identify and correct a condition adverse to quality associated with the Unit 2 pressurizer safety valves (PSVs). Specifically, following determination of a new PSV temperature profile, Constellation did not promptly identify that the valve setpoint would drift outside of the Technical Specification (TS) requirements during the operating cycle. This would have resulted in the PSVs becoming inoperable. Immediate corrective actions included placing this issue into the CAP, performing a re-analysis of PSV setpoints including the expected drift, and revising the 00. Upon re-analysis, Constellation determined that the PSVs currently installed in Unit 2 are conditionally operable until February 8, 2012. Additional corrective actions will be required prior to operating the unit beyond this date. The finding is more than minor because it is similar to examples 3j and 3k in IMC 0612, Appendix E, in that the failure to account for drift in the 00 resulted in a reasonable doubt on the operability of the PSVs. In addition, the finding is associated with the equipment performance attribute of the Mitigating Systems cornerstone and affected the cornerstone objective to ensure the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. The inspectors determined the finding is of very low safety significance because the finding is a design or qualification deficiency confirmed not to result in a loss of operability. This finding has a cross-cutting aspect in the area of problem identification and resolution, CAP, because Constellation did not thoroughly evaluate a problem such that the resolution addressed causes and extent of condition as necessary. Specifically, Constellation did not conduct an adequate operability review of the PSVs following identification of an unexpected temperature profile (P.1.c per IMC 0310). |
| Site: | Calvert Cliffs  |
|---|---|
| Report | IR 05000317/2011004 Section 1R22 |
| Date counted | Sep 30, 2011 (2011Q3) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.22 |
| Inspectors (proximate) | G Dentel S Kennedy R Rolph J Hawkins E Torres R Montgomery K Cronk M Jennerich |
| CCA | P.2, Evaluation |
| INPO aspect | PI.2 |
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Finding - Calvert Cliffs - IR 05000317/2011004 | |||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Calvert Cliffs) @ 2011Q3
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