05000220/FIN-2010002-03
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Finding | |
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| Title | |
| Description | A self-revealing finding of very low safety significance associated with a non-cited violation (NCV) of Technical Specification (TS) 5.4, Procedures, was identified when technicians used an inadequate procedure for filling and venting a Unit 2 residual heat removal (RHR) system pressure detector following system maintenance, which resulted in an automatic scram. When the procedure was developed, Nine Mile Point Nuclear Station (NMPNS) did not identify that the detector to be filled and vented was connected to multiple detectors in other systems, and therefore did not evaluate the effect that the activity would have on these additional detectors. As immediate corrective action, RHR detector restoration was stopped and an investigation into the cause of the event was commenced. The issue was entered into the corrective action program (CAP) as condition report (CR)2010-0192.The finding was more than minor because it was associated with the procedure quality attribute of the Initiating Events cornerstone and affected the cornerstone objective to limit the likelihood of those events that upset plant stability and challenge critical safety functions during shutdown as well as power operations. Additionally, the finding was similar to example 4.b in Appendix E of Inspection Manual Chapter (IMC) 0612, in that it resulted in a reactor scram. The finding was of very low safety significance because the finding did not contribute to both the likelihood of a reactor trip and the likelihood that mitigation equipment or functions would not be available. The finding had a cross-cutting aspect in the area of human performance, resources, because Nine Mile Point Nuclear Station (NMPNS) did not provide maintenance personnel with an accurate work package for filling and venting the \'C\'RHR pressure detector |
| Site: | Nine Mile Point  |
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| Report | IR 05000220/2010002 Section 4OA3 |
| Date counted | Mar 31, 2010 (2010Q1) |
| Type: | NCV: Green |
| cornerstone | Initiating Events |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71153 |
| Inspectors (proximate) | C Bickett D Dempsey E Bonney E Knutson F Arner J Lilliendahl M Orr N Perry |
| CCA | H.7, Documentation |
| INPO aspect | WP.3 |
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Finding - Nine Mile Point - IR 05000220/2010002 | |||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Nine Mile Point) @ 2010Q1
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