05000247/FIN-2010002-01
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Finding | |
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| Title | Isolation of Service Water to All Emergency Diesel Generators |
| Description | A self-revealing NCV of Technical Specification (TS) Limiting Condition of Operation (LCO) 3.8.2 was identified when Entergy personnel did not maintain service water (SW) cooling to the emergency diesel generators (EDGs) when the reactor was in cold shutdown. Specifically, on March 13, 2010, Entergy personnel isolated cooling water flow to the EDGs for a period of three minutes. This condition was corrected after an alarm in the control room alerted the operators to the condition and the operators promptly directed the restoration of cooling water to the EDGs. The inspectors determined that the isolation of cooling water flow to the standby EDGs was a violation of TS LCO 3.8.2, which requires Two EDGs to be capable of supplying two safeguards power trains of the onsite AC electrical power distribution subsystem(s) required by LCO 3.8.10. Inadequate SW cooling to the EDGs, if left uncorrected, could have caused the EDGs to fail from a lack of cooling. This finding is more than minor because it is associated with the configuration control attribute of the Mitigating Systems cornerstone and adversely affected the objective to assure the availability, reliability and capability of systems that respond to initiating events to prevent core damage. The finding was determined to be of very low safety significance (Green) because further analysis by Entergy staff determined that the EDGs could have operated without cooling water for the period of three minutes. The finding has a cross-cutting aspect in the area of human performance related to work practices. Entergy personnel did not incorporate actions to address the impact of work on different job activities, and did not plan work activities to support equipment reliability by limiting safety systems unavailability and reliance on manual actions (H.3.b). |
| Site: | Indian Point  |
|---|---|
| Report | IR 05000247/2010002 Section 1R20 |
| Date counted | Mar 31, 2010 (2010Q1) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71111.2 |
| Inspectors (proximate) | B Haagensen E Gray E Keighley J Noggle J Schoppy M Gray O Ayegbiso S Barr |
| CCA | H.5, Work Management |
| INPO aspect | WP.1 |
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Finding - Indian Point - IR 05000247/2010002 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Indian Point) @ 2010Q1
Self-Identified List (Indian Point)
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