05000528/FIN-2010004-04
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Finding | |
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| Title | Unqualified Coatings in Containment |
| Description | The inspectors identified a noncited violation of 10 CFR Part 50, Appendix B, Criterion V, Instructions, Procedures, and Drawings, for an inadequate procedure for the application of coatings in containment. Specifically, during construction, Specification 13-AM-314, Installation Specification for Surface Coating Systems for Concrete, improperly required a dry-film thickness of 2 to 5 mils for MobilNalspar 84-V-200, which is beyond the limits of 2 to 5 mils wet-film thickness that was allowed by the vendor instructions. MobilNalspar 84- V-200 was found to lack design basis testing and subsequent testing demonstrated that 50 percent of the coating in excess of 2 mils thickness failed as particulate, rather than chips, which increases debris loading on the containment sump. The licensee plans to revise calculation N001-1106-00002, Debris Generation Due to LOCA within Containment for Resolution of GSI-191, to incorporate the added debris loading from the unqualified coatings as a corrective action. This issue was entered into the licensees corrective action program as Palo Verde Action Request 34691 33. The performance deficiency was more than minor, and is therefore a finding, because it affected the design control attribute of the Mitigating Systems Cornerstone, and affected the cornerstone objective of ensuring the reliability and capability of systems that respond to initiating events to prevent undesirable consequences. Using Manual Chapter 0609.04, Phase 1 - Initial Screening and Characterization of Findings, the finding was determined to have a very low safety significance because the finding did not result in a loss of system safety function, an actual loss of safety function of a single train for greater than its technical specification allowed outage time, or screen as potentially risk significant due to a seismic, flooding, or severe weather initiating event. This finding was evaluated as not having a crosscutting aspect because the performance deficiency is not reflective of current performance. |
| Site: | Palo Verde  |
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| Report | IR 05000528/2010004 Section 4OA2 |
| Date counted | Sep 30, 2010 (2010Q3) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71152 |
| Inspectors (proximate) | R Lantz J Bashore M Baquera D Reinert Z Hollcraft |
| INPO aspect | |
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Finding - Palo Verde - IR 05000528/2010004 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Palo Verde) @ 2010Q3
Self-Identified List (Palo Verde)
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