05000255/FIN-2008005-02
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Finding | |
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Title | Emergency Diesel Generator Inoperable in Excess of Technical Specification Requirements |
Description | A self-revealed finding of very low safety significance (Green) and an associated NCV for failure to comply with TS 3.8.1 requirements when metal fragments were found in the valve assembly area of the 1-2 Emergency Diesel Generator (EDG) cylinder 2L. The source of the fragments was a failed spring lock for one of the exhaust valves. This resulted in the EDG being inoperable for a period greater than allowed by TSs. Subsequently, the licensee inspected the remaining spring locks on the 1-2 EDG. Inspections of the 1-1 EDG spring locks are planned. The finding is more than minor because it affected the equipment performance attribute of the mitigating system cornerstone and adversely affected the objective of ensuring the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. A failure analysis performed by the vendor in conjunction with an apparent cause analysis by the licensee led to an evaluation that the diesel could perform its safety function for at least the 24-hour Probabilistic Risk Assessment mission time. In consultation with the regional Senior Risk Analyst, the finding screens as Green using the significance determination process phase 1. No cross-cutting aspect was assigned because this issue is not indicative of current plant performance. (4OA3 |
Site: | Palisades ![]() |
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Report | IR 05000255/2008005 Section 4OA3 |
Date counted | Dec 31, 2008 (2008Q4) |
Type: | NCV: Green |
cornerstone | Mitigating Systems |
Identified by: | Self-revealing |
Inspection Procedure: | IP 71153 |
Inspectors (proximate) | R Jickling R Winter A Dahbur J Cassidy J Ellegood J Giessner T Taylor |
INPO aspect | |
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Finding - Palisades - IR 05000255/2008005 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Palisades) @ 2008Q4
Self-Identified List (Palisades)
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