05000456/FIN-2010002-05
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Finding | |
|---|---|
| Title | Licensee-Identified Violation |
| Description | Title 10 CFR 50, Appendix B, Criterion V, Instructions, Procedures, and Drawings, requires, in part, that activities affecting quality shall be accomplished in accordance with documented instructions, procedures or drawings. Contrary to the above, on July 1, 2009, the licensee failed to follow procedure OP-AA-109-01, Attachment 8, Clearance Authorization Checklist, which requires all clearance order (C/O) tags be removed or accounted for. Specifically, carbon dioxide (CO2) fire protection valve 2CO052C (Lower Cable Spreading Room Fire Zone 2S-45 Redundant EMPC Lockout Valve) was not restored to the required open position during removal of C/O 74741. There are two CO2 discharge paths, main and redundant. With valve 2CO052C closed rather than open, the redundant CO2 discharge path to fire zone 2S-45 was blocked. Automatic CO2 discharge occurs through the main path and manual backup discharge can be actuated through the main or redundant paths. Therefore, with valve 2CO052C in the closed position the redundant manual discharge path was blocked, however, automatic and manual CO2 discharge remained available through the main path. The finding was more than minor due to impacting the Mitigating Systems Cornerstone objective to ensure the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. Because the inspectors assigned a low degradation rating to the issue, the finding screens as one of very low safety significance. The licensee entered this into their CAP as IR 1023743 and verified all other valves on C/O 74741 were in the correct position. In addition, the licensee initiated an Apparent Cause Evaluation to determine why the mispositioned valve was not discovered during prior opportunities |
| Site: | Braidwood  |
|---|---|
| Report | IR 05000456/2010002 Section 4OA7 |
| Date counted | Mar 31, 2010 (2010Q1) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Licensee-identified |
| Inspection Procedure: | |
| Inspectors (proximate) | N Shah R Langstaff J Robbins B Dickson M Perry A Garmoe R Skokowski C Scott |
| INPO aspect | |
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Finding - Braidwood - IR 05000456/2010002 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Braidwood) @ 2010Q1
Self-Identified List (Braidwood)
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