05000482/FIN-2010005-05
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Finding | |
|---|---|
| Title | Failure to Identify Boric Acid Leak on Instrument Lines to Reactor Coolant System |
| Description | The inspectors identified a noncited violation of 10 CFR Part 50, Appendix B, Criterion V, Instructions, Procedures, and Drawings, involving the licensees failure to identify, document, and evaluate sources of boric acid leakage. During a boric acid walkdown and containment closeout tour on December 7, 2010, the inspectors identified a boric acid leak in an instrument line to the reactor coolant system loop 2 flow transmitters which had not been previously identified and documented by the licensee. As such, the licensee failed to accomplish the requirements of procedure AP 16F-001, Boric Acid Corrosion Control Program, Revision 6A, step 6.1, which stated, in part, that sources of boron leakage shall be identified and documented in the applicable corrective action document. The licensee entered this finding into their corrective action system as Condition Report 31003 and replaced the leaking union. The finding was determined to be more than minor because it was associated with the Initiating Events Cornerstone attribute of human performance and affected the cornerstone objective to limit the likelihood of those events that upset plant stability and challenge critical safety functions during shutdown as well as power operations. The inspectors used Inspection Manual Chapter 0609, and determined the finding was of very low safety significance (Green) because the issue would not result in exceeding the technical specification limit for identified reactor coolant system leakage or affect other mitigating systems resulting in a total loss of their safety function. The inspectors also determined that the finding had a crosscutting aspect in the area of problem identification and resolution associated with the corrective action program component because the licensee did not have a sufficiently low threshold in order to identify boric acid leaks during walkdowns. |
| Site: | Wolf Creek  |
|---|---|
| Report | IR 05000482/2010005 Section 1R20 |
| Date counted | Dec 31, 2010 (2010Q4) |
| Type: | NCV: Green |
| cornerstone | Initiating Events |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.2 |
| Inspectors (proximate) | G Apger J Groom B Correll N Greene T Farina W Strickland K Clayton D Stearns L Carson D Allen J Adams C Long C Peabody |
| CCA | P.1, Identification |
| INPO aspect | PI.1 |
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Finding - Wolf Creek - IR 05000482/2010005 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Wolf Creek) @ 2010Q4
Self-Identified List (Wolf Creek)
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