05000528/FIN-2008004-03
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Finding | |
|---|---|
| Title | Potentially Degraded Flood Penetration Seals |
| Description | The inspectors identified a URI associated with 10 CFR Part 50, Criterion XVI, \"Corrective Action,\" for failure of operations and engineering personnel to promptly identify and correct a condition adverse to quality involving internal flood protection for safety-related equipment. The inspectors reviewed Information Notice 2007-01, \"Recent Operating Experience Concerning Hydrostatic Barriers,\" and its applicability to Palo Verde. The review was performed to verify that recent operating experience involving degraded foam penetration seals was evaluated to ensure adequate internal flood protection for safety-related equipment. The licensee\'s review of Information Notice 2007-01, in February 2007, determined that the penetration seal material discussed in Information Notice 2007-01 was similar to the material used at Palo Verde, that the seals are not periodically inspected for degradation, and that Palo Verde has previously had unsealed conduits allow flooding into safety-related areas. Inspectors determined that the licensee credited their fire protection inspection Procedure 14FT-9FP70, \"Appendix R and Former Technical Specification Penetration Seal Surveillance,\" Revision 7, for flood inspections even though the acceptance criteria for fire protection allowed small gaps in seals while flood protection did not. In December 2007, when the inspectors reviewed Information Notice 2007-01, the inspectors questioned what actions had been taken to ensure there were no degraded or nonconforming hydrostatic seals in the plant. The inspectors determined that maintenance and engineering personnel had not taken corrective action to inspect the penetration seals and to monitor the seals in accordance with the maintenance rule program, even after reviewing Information Notice 2007-01 in February 2007. After reviewing the fire inspection Procedure 14FT-9FP70, flood design calculations, and the maintenance rule scoping document Procedure 81DP-0ZZ01, \"Civil System, Structure, and Component Monitoring Program,\" Revision 13, the inspectors determined that the licensee was not verifying the adequacy of design of their hydrostatic seals in accordance with these documents. After discussion with the inspectors, the licensee developed acceptance criteria to inspect the barriers, and began inspecting all of the approximately 1,500 seals located in Units 1, 2, and 3 in July 2008. The licensee has inspected 96 percent of seals in Units 1 and 2, and has declared 19 hydrostatic seals nonfunctional. The licensee plans to inspect the additional seals in Units 1 and 2, and all of the seals in Unit 3 by the end of October 2008. This unresolved issue is being opened to determine the extent of degraded flood penetration seals at Palo Verde and the potential aggregate effect of more than one seal penetration failure: URI 05000528;529;530/2008004-03, Potentially Degraded Flood Penetration Seals. |
| Site: | Palo Verde  |
|---|---|
| Report | IR 05000528/2008004 Section 1R06 |
| Date counted | Sep 30, 2008 (2008Q3) |
| Type: | URI: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.06 |
| Inspectors (proximate) | P Goldberg R Treadway B Henderson T Mckernon J Melfi D Proulx G Apger A Fairbanks J Bashore M Bloodgood M Catts T Buchananl Ricketsong Guerra R Treadway P Elkmann S Graves D Allen J Melfi W Sifre M Young D Proulx A Fairbanks J Bashore S Makor M Catts C Ryan T Buchanan A Vegel I Anchando |
| INPO aspect | |
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Finding - Palo Verde - IR 05000528/2008004 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Palo Verde) @ 2008Q3
Self-Identified List (Palo Verde)
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