05000456/FIN-2009004-02
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Finding | |
|---|---|
| Title | Failure of Fire Protection Valve Stroke Procedure Results in Trip of B Train of Main Control Room Ventilation |
| Description | A NCV of 10 CFR 50, Appendix B, Criterion V, was self-revealed on September 22, 2009, when performance of a fire protection valve stroke procedure resulted in a trip of the B Train of the Main Control Room Ventilation System. Specifically, conflicting procedural guidance resulted in operators stroking the B Train Main Control Room Recirculation Charcoal Absorber deluge valve, which resulted in an unexpected trip of the safety-related B train of Main Control Room Ventilation and entry into Technical Specifications (TS) 3.7.10 and 3.7.11. The licensee conducted trainings and briefings to the operators to identify the potential error traps in procedures and entered this issue into the corrective action program (CAP) as IR 968717. The finding is more than minor because it affected the procedure quality attribute of the Barrier Integrity Cornerstone objective to maintain the radiological barrier functionality of the control room. The inspectors answered No to all questions in the Containment Barrier Column of IMC 0604, Attachment 4, Table 4a, Characterization Worksheet for IE, MS, and BI Cornerstones, and the finding screened as having very low safety significance. This finding is associated with the cross-cutting attribute of decision making in the Human Performance cross-cutting component (H.1(a)). Specifically, when faced with uncertainty in procedural direction during performance of the fire protection valve surveillance, the licensee did not use a systematic process for decision making, which resulted in a trip of the B Train of Main Control Room Ventilation. |
| Site: | Braidwood  |
|---|---|
| Report | IR 05000456/2009004 Section 1R05 |
| Date counted | Sep 30, 2009 (2009Q3) |
| Type: | NCV: Green |
| cornerstone | Barrier Integrity |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71111.05 |
| Inspectors (proximate) | R Ng B Dickson M Mitchell B Palagi R Walton M Perry A Garmoe R Skokowski M Thorpe-Kavanaugh T Hartman J Gall |
| CCA | H.13, Consistent Process |
| INPO aspect | DM.1 |
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Finding - Braidwood - IR 05000456/2009004 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Braidwood) @ 2009Q3
Self-Identified List (Braidwood)
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