05000220/FIN-2010002-02
From kanterella
Jump to navigation
Jump to search
Finding | |
|---|---|
| Title | Inadequate Performance Testing of the Division 1 Battery |
| Description | An NRC-identified finding of very low safety significance associated with a non-cited violation (NCV) of 10 CFR Part 50, Appendix B, Criterion XI, Test Control, was identified, in that Unit 2 Division 1 vital battery, 2BYS*BAT2A (the 2A battery), performance testing was not performed in accordance with written test procedures. Specifically, procedure deviations were made during the three most recent biennial performance tests which resulted in inaccurate determinations of battery capacity. As immediate corrective action, Nine Mile Point Nuclear Station (NMPNS) entered the issue into the corrective action program (CAP) as condition report (CR) 2010-1987 and implemented actions to estimate the current battery capacity. Based on the magnitude of the errors and current battery capacity margins, NMPNS determined that there were no operability issues with the 2Abattery.The finding was more than minor because it was associated with the human performance attribute of the Mitigating Systems cornerstone and adversely affected the cornerstone objective of ensuring the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. Additionally, the finding was similar to example 2.c in Appendix E of Inspection Manual Chapter (IMC) 0612, in that the test performance issue was repetitive. The finding was of very low safety significance because it was not a design or qualification deficiency, did not represent a loss of a system/train safety function, and did not screen as potentially risk significant due to external events. The finding had a cross-cutting aspect in the area of human performance, work practices, because personnel did not follow the modified performance test procedur |
| Site: | Nine Mile Point  |
|---|---|
| Report | IR 05000220/2010002 Section 1R18 |
| Date counted | Mar 31, 2010 (2010Q1) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.18 |
| Inspectors (proximate) | C Bickett D Dempsey E Bonney E Knutson F Arner J Lilliendahl M Orr N Perry |
| CCA | H.8, Procedure Adherence |
| INPO aspect | WP.4 |
| ' | |
Finding - Nine Mile Point - IR 05000220/2010002 | |||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Finding List (Nine Mile Point) @ 2010Q1
| |||||||||||||||||||||||||||||||||||||||||||||