05000455/FIN-2008003-04
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Finding | |
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| Title | Failure to Correctly Tighten Fittings Leads to Failure to Start During a Surveillance of the 0B Sx Makeup Pump |
| Description | A finding of very low safety significance and associated NCV of Technical Specification (TS) 5.4, Procedures, was self-revealed on May 27, 2008, when the 0B essential service water (SX) system makeup pump failed to start during a planned monthly surveillance test. The pump failed to start due to a lack of fuel prime. The licensee determined that on April 29, 2008, the check valve on the fuel oil supply line between the day tank and the engine had been replaced as part of a routine preventive maintenance program. The check valve was found in the installed condition with a loose fitting. The loose fitting had leaked slowly allowing fuel oil to drain from the primed fuel oil supply line. The issue has been entered into the licensees CAP (IR 779699). The licensees corrective actions included repairing the check valve and associated deficiencies, as well as revising the maintenance procedure. The finding was considered more than minor because there was an actual loss of safety function of a single train for greater than its TS allowed outage time. The finding was determined to be of very low safety significance during a Phase 3 SDP. The primary cause of this finding was related to the cross-cutting area of Human Performance for Work Practices (H.4(c)) because licensee supervisory oversight of work activity failed to ensure procedural compliance |
| Site: | Byron  |
|---|---|
| Report | IR 05000455/2008003 Section 1R12 |
| Date counted | Jun 30, 2008 (2008Q2) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71111.12 |
| Inspectors (proximate) | B Bartlett C Acosta C Thompson C Zoia D Jones J Cassidy J Jacobson N Feliz Adorno R Jickling R Ng R Russell R Skokowski T Bilik V Meghani |
| CCA | H.2, Field Presence |
| INPO aspect | LA.2 |
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Finding - Byron - IR 05000455/2008003 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Byron) @ 2008Q2
Self-Identified List (Byron)
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