05000286/FIN-2010009-01
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Finding | |
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| Title | Inadequate Design Control of Service Water Strainer Room Flood Barrier |
| Description | The team identified a non-cited violation of 10 CFR 50, Appendix B, Criterion III, Design Control, in that Entergy did not verify the adequacy of the flood barrier design for the service water (SW) strainer room to ensure safety-related equipment would not be impacted during a design basis flood. Specifically, electrical conduits which passed through the SW strainer room wall, separating the service water strainer room from the Hudson River, were not sealed. Additionally, the sump pump discharge piping which also passed through the wall did not have a backflow prevention device in the pipe. This resulted in the service water strainers being susceptible to flooding at the design flood level. Entergy entered the issue into their corrective action program for evaluation and installed seals in the conduits. . The finding was more than minor because it was associated with the external factors (flood hazard) attribute of the Mitigating Systems Cornerstone and adversely affected the cornerstone objective of ensuring the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. The team evaluated the finding using IMC 0609 Attachment 4 Phase 1 - Initial Screening and Characterization of Findings, which determined that a Phase 3 evaluation was required because the finding screened as potentially risk significant due to a flooding event. The Region I Senior Reactor Analyst (SRA) performed a Phase 3 evaluation based on the plants Individual Plant Examination of External Events (IPEEE) study and determined the risk to be of very low safety significance (Green). The team did not identify a crosscutting aspect with this finding because this was an original design issue and therefore was not reflective of current performance. |
| Site: | Indian Point  |
|---|---|
| Report | IR 05000286/2010009 Section 1R21 |
| Date counted | Dec 31, 2010 (2010Q4) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.21 |
| Inspectors (proximate) | C Williams E Burket G Morris K Mangan L Doerflein L Scholl R Fuhrmeister W Sherbin |
| INPO aspect | |
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Finding - Indian Point - IR 05000286/2010009 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Indian Point) @ 2010Q4
Self-Identified List (Indian Point)
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