05000277/FIN-2012002-02
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Finding | |
|---|---|
| Title | Inadequate Corrective Action to Address Residual Heat Removal Heat Exchanger Graphite Gasket Leaks |
| Description | The inspectors determined that PBAPS did not promptly identify and correct residual heat removal (RHR) heat exchanger (HX) graphoil gasket leaks. The PD constituted a Green, self-revealing NCV of 10 CFR Part 50, Appendix B, Criterion XVI, Corrective Action. Specifically, measures established to identify and correct previous graphoil gasket leaks were inadequate to correct the condition adverse to quality. Consequently, on February 16, 2012, the Unit 2 \'C\' RHRHX shell cover lower flange graphoil gasket failed during testing, rendering the \'C\' RHR subsystem inoperable. PBAPS entered this issue into CAP via IR 1327477. This finding was more than minor because it was associated with the equipment performance attribute of the Mitigating System cornerstone, and adversely affected the cornerstone objective of ensuring the availability, reliability, and capability of systems that respond to initiating events and prevent undesirable consequences. Using IMC 0609, Attachment 4, Phase 1 Initial Screening and Characterization of Findings, the inspectors determined that this finding was of very low safety significance (Green) because it did not represent an actual loss of safety function for a single RHR train for greater than its TS allowed outage time, and did not screen as potentially risk significant due to an external initiating event. The inspectors determined that this finding had a cross-cutting aspect in the area of PI&R, CAP, because PBAPS did not thoroughly evaluate previous graphoil gasket failures used in RHR HX applications to ensure the resolution addressed the cause and extent of condition. |
| Site: | Peach Bottom  |
|---|---|
| Report | IR 05000277/2012002 Section 1R19 |
| Date counted | Mar 31, 2012 (2012Q1) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71111.19 |
| Inspectors (proximate) | J Furia A Rosebrook S Hansell A Ziedonis P Krohn |
| CCA | P.2, Evaluation |
| INPO aspect | PI.2 |
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Finding - Peach Bottom - IR 05000277/2012002 | ||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Peach Bottom) @ 2012Q1
Self-Identified List (Peach Bottom)
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