05000440/FIN-2008002-04
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Finding | |
|---|---|
| Title | Adequacy of Reactor Core Isolation Cooling System Flow Controller Tuning Procedures (Section 1R22.b.1) |
| Description | A finding of very low safety significance and a non-cited violation of 10 CFR Part 50, Appendix B, Criterion V, \\\"Procedures,\\\" was self-revealed during the reactor scram and plant response on November 28, 2007, when reactor core isolation cooling (RCIC) failed to perform its design function. The RCIC system started automatically on low reactor water level, began to inject into the reactor pressure vessel, and then tripped on low suction pressure. The RCIC pump flow controller was found to have been incorrectly tuned in January 2006. As part of their immediate corrective actions, licensee personnel tuned the RCIC controller prior to the December 6, 2007, plant startup. The finding was considered more than minor because it was associated with Equipment Reliability 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 in order to prevent undesirable consequences. The finding was determined, through Phase 3 analysis, to be of very low safety significance. The primary cause of this finding was related to the cross-cutting area of Problem Identification and Resolution as defined in IMC 0305 P.2(b) because the licensee failed to institutionalize operating experience through changes to procedures regarding flow controller settings. (Section 1R22.b.1 |
| Site: | Perry  |
|---|---|
| Report | IR 05000440/2008002 Section 1R22 |
| Date counted | Mar 31, 2008 (2008Q1) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71111.22 |
| Inspectors (proximate) | M Wilk A Dahbur G Wright M Franke J Cameron |
| CCA | P.5, Operating Experience |
| INPO aspect | CL.1 |
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Finding - Perry - IR 05000440/2008002 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Perry) @ 2008Q1
Self-Identified List (Perry)
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