05000354/FIN-2011004-01
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Finding | |
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| Title | Inadequate Corrective Actions Associated With a Known Degraded Condition of the 00-K-107 Service Air Compressor Outlet Check Valve |
| Description | A self-revealing finding was identified because of the PMOC did not drive sustainable improvements in the 00-K-107 service air compressor's reliability as required by PM program procedure WC-AA-111. Specifically, PSEG did not change the PM frequency of the degraded compressor outlet check valve (H0KA-0KAV-004) nor evaluate the use of materials less susceptible to corrosion after several recent performances of the 18-month PM found excessive corrosion and rust on the valve internals. Consequently, this check valve failed closed due to corrosion, tripped the air compressor, and caused a service and instrument air headers pressure transients followed by an automatic start of the EIAC. After the May 12,2011, failure, PSEG refurbished H0KA-0KAV-004's internals with new carbon steel components and plans to replace the 00-K-107 and 10-K-107 compressors'outlet check valves with stainless steel valves that are less susceptible to corrosion (Orders 60097323 and 60097371). This finding is more than minor because it was associated with the equipment performance attribute of the Initiating Events cornerstone and affected the cornerstone objective of limiting the likelihood of events that upset plant stability and challenge critical safety functions at power. Specifically, the failure to adequately maintain the degraded compressor outlet check valve in the service air header increased the likelihood of a plant trip. The inspectors evaluated this finding using IMC 0609, Attachment 4, Phase 1 - lnitial Screening and Characterization of Findings, Table 4a, and determined the finding to be of very low safety significance (Green) because the finding does not contribute to both the likelihood of a reactor trip and the likelihood that mitigation equipment would not be available. The finding has a cross-cutting aspect in the area of human performance, work control component; because PSEG did not appropriately coordinate work activities by incorporating actions to ensure that maintenance scheduling is more preventive than reactive. Specifically, PSEG did not implement a recommended increase (PCR 80101517) in the frequency of a PM for H0KA-0KAV-004 before the valve failed shut and required reactive maintenance following a trip of the 00-K-107 air compressor |
| Site: | Hope Creek  |
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| Report | IR 05000354/2011004 Section 1R12 |
| Date counted | Sep 30, 2011 (2011Q3) |
| Type: | Finding: Green |
| cornerstone | Initiating Events |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71111.12 |
| Inspectors (proximate) | A Patel F Bower A Burritt J Hawkins C Douglas P Kaufman J Schoppy J Furia |
| CCA | H.5, Work Management |
| INPO aspect | WP.1 |
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Finding - Hope Creek - IR 05000354/2011004 | |||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Hope Creek) @ 2011Q3
Self-Identified List (Hope Creek)
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