05000454/FIN-2010003-01
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Finding | |
|---|---|
| Title | 0B Fire Pump Discharge Valve Discovered Closed |
| Description | A self-revealed finding of very low safety significance and associated Non-Cited Violation of Byron Operating License Condition 2.C(6) for Unit 1 and 2.E for Unit 2 for the licensees failure to identify the separation of the 0B Fire Pump discharge valve, 0FP018B, valve stem and valve disk. As a result, the mitigating functions associated with the 0B Diesel driven fire pump would not be assured. The licensee entered this issue into the Corrective Action Program (CAP) as Issue Report (IR) 1063395 and repaired the valve. The issue is more than minor because it affected the Mitigating Systems Cornerstone attribute of Protecting Against External Events and affected the cornerstone objective of ensuring the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. Based on a Phase 3 significance evaluation, the finding is determined to be of very low safety significance. The primary cause for this finding was related to the cross-cutting area of Problem Identification and Resolution and its associated component for CAP (P.1(c)) because licensee personnel failed to identify the discharge valves functionality was impacted by its degraded state. (Section 1R12.b) |
| Site: | Byron  |
|---|---|
| Report | IR 05000454/2010003 Section 1R12 |
| Date counted | Jun 30, 2010 (2010Q2) |
| Type: | NCV: Green |
| cornerstone | Initiating Events, Mitigating Systems |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71111.12 |
| Inspectors (proximate) | T Bilik B Metrow D Jones T Go V Meghani R Skokowski J Bishop R Ng C Thompson B Bartlett J Robbins B Jose |
| CCA | P.2, Evaluation |
| INPO aspect | PI.2 |
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Finding - Byron - IR 05000454/2010003 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Byron) @ 2010Q2
Self-Identified List (Byron)
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