05000445/FIN-2011002-01
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Finding | |
|---|---|
| Title | Emergency Boration Flow Path Isolated |
| Description | The inspectors reviewed a self-revealing NCV of Technical Specification 5.4.1.a for the failure to implement a boric acid system procedure. As a result, an emergency boration flow path was isolated. The licensee entered the finding into the corrective action program as Condition Report CR-2011-000590. The finding was more than minor because it was associated with the human performance attribute of the mitigating systems cornerstone and adversely affected the cornerstone objective to ensure the availability of systems that respond to initiating events to prevent undesirable consequences. Specifically, an emergency boration flow path was inadvertently isolated. Using IMC 0609, Attachment 4, Phase 1 - Initial Screening and Characterization of Findings, the finding was determined to represent an actual loss of safety function of non-technical specification equipment designated as risk-significant per 10 CFR 50.65 for greater than 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. Therefore, the finding was determined to require an Appendix A significance determination process Phase2 analysis. The inspectors determined that, for evaluation purposes, a total failure of emergency boration capability bounded the event. The inspectors evaluated the finding using the Phase2 pre-solved table for operator fails to initiate emergency boration. Since the flow path was isolated from January 17 to January 18, 2011, the inspectors used the less than three days section of the table for evaluating the finding and determined the finding was of very low safety significance. The finding has a human performance crosscutting aspect associated with work practices because licensee personnel proceeded in the face of unexpected circumstances and did not consult supervision (H.4 (a)). |
| Site: | Comanche Peak  |
|---|---|
| Report | IR 05000445/2011002 Section 1R04 |
| Date counted | Mar 31, 2011 (2011Q1) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71111.04 |
| Inspectors (proximate) | D Stearns L Carson W Walker B Tindell J Kramer |
| CCA | H.12, Avoid Complacency |
| INPO aspect | QA.4 |
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Finding - Comanche Peak - IR 05000445/2011002 | ||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Comanche Peak) @ 2011Q1
Self-Identified List (Comanche Peak)
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