05000285/FIN-2011003-04
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Finding | |
|---|---|
| Title | Failure to Provide Procedural Guidance to Replace or Evaluate Age Degraded Components |
| Description | A self-revealing noncited violation of Fort Calhoun Technical Specification 5.8.1, Procedures, occurred due to the failure of the licensee to ensure that adequate procedures were available for maintenance which was conducted on the reactor protective systems power supplies. Specifically, there was no procedural guidance to require replacement of power supplies, or an engineering justification for continued operation, once power supplies exceeded their vendor recommended life, and/or showed signs of failure and degradation. The inspectors determined that the licensees failure to provide procedural guidance to evaluate and/or replace age-degraded components was a performance deficiency. This was a result of the licensees failure to properly implement a required procedure, and was within the licensees ability to foresee and correct and could have been prevented. This performance deficiency was more than minor because it could be reasonably viewed as a precursor to a significant event, it could lead to a loss of the reactor protective system. The inspectors evaluated this finding using Inspection Manual Chapter 0609, Attachment 4, and determined that this finding was associated with the Mitigating Systems Cornerstone, specifically the primary degraded reactivity control contributor. Because this finding occurred while the unit was operating at full power, the inspectors used Inspection Manual Chapter 0609 to determine its significance. The inspectors determined that the finding represented a qualification deficiency confirmed not to result in a loss of functionality because none of the failures to date prevented a reactor protective systems channel from tripping. Therefore, in accordance with the Phase 1 screening, the finding was of very low risk significance. This finding had a crosscutting aspect in the area of problem identification and resolution associated with the component of operating experience because the licensee failed to adequately evaluate and communicate relevant internal and external operator experience. |
| Site: | Fort Calhoun  |
|---|---|
| Report | IR 05000285/2011003 Section 4OA2 |
| Date counted | Jun 30, 2011 (2011Q2) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71152 |
| Inspectors (proximate) | L Ricketson P Elkman J Kirkland J Melfi M Young A Fairbanks I Anchondo C Alldredge J Wingebach |
| CCA | P.5, Operating Experience |
| INPO aspect | CL.1 |
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Finding - Fort Calhoun - IR 05000285/2011003 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Fort Calhoun) @ 2011Q2
Self-Identified List (Fort Calhoun)
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