05000336/FIN-2009004-02
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Finding | |
|---|---|
| Title | Inadequate Procedures Caused a Leak from the Charging Header into the Auxiliary Building Drain System |
| Description | A violation of 10 CFR 50, Appendix 8, Criteria V dispositioned as an NCV was identified for Dominion\'s failure to provide adequate operating procedures that were appropriate for the circumstances to operate the Unit 2 charging pumps during reactor shutdown. Specifically, on July 9, 2009, the operators were required to raise pressurizer level while drawing a bubble in the pressurizer in preparation for transitioning from mode5 to mode 4. Dominion started the 8 positive displacement charging pump without first opening the charging header isolation valves and damaged two relief valves in the charging line. Neither of the operating procedures in use for this evolution required the charging header isolation valves to be opened. This event was more than minor because if left uncorrected, the performance deficiency had a potential to lead to a more significant safety concern. This finding is associated with the equipment performance attribute of the mitigating systems cornerstone. The finding has a cross-cutting aspect in the area of human performance, maintaining complete accurate and up-to-date procedures, because Dominion did not provide an operating procedure that was appropriate for accomplishing the task under the circumstances (H.2.c). |
| Site: | Millstone  |
|---|---|
| Report | IR 05000336/2009004 Section 1R20 |
| Date counted | Sep 30, 2009 (2009Q3) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.2 |
| Inspectors (proximate) | T Moslak B Haagensen D Johnson J Krafty S Shaffer J Tifft R Bellamy C Crisden |
| CCA | H.7, Documentation |
| INPO aspect | WP.3 |
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Finding - Millstone - IR 05000336/2009004 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Millstone) @ 2009Q3
Self-Identified List (Millstone)
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