05000361/FIN-2012003-05
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Finding | |
|---|---|
| Title | Failure to Follow Battery Testing Procedure for Battery Exceeding 85% Service Life |
| Description | The inspectors identified a finding for the failure to follow the battery testing procedure for non-class 1E batteries. Specifically, licensee personnel failed to implement the non-class 1E battery testing procedure, SO23-I-9.96, Non-1E Battery Bank Performance Test, Revision 5, for Unit 2 battery 2B011 during refuel R2C17 when the battery is greater than 85% of its expected service life. The licensee submitted and approved an outage scope change request to test the battery during the current outage, and generated Nuclear Notification NN 201997619, to determine when battery 2B011 testing can be performed during the outage. The issue was entered into the licensees corrective action program as Nuclear Notification NN 201994131. The performance deficiency is more than minor, and therefore a finding, because it was associated with the human performance attribute of the Mitigating Systems Cornerstone, and affected the cornerstone objective of ensuring the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. The finding was determined to have very low safety significance (Green) since it did not meet any of the greater than green criteria in Table 4A of Manual Chapter 0609, Attachment 04. The finding had a crosscutting aspect in the human performance area, associated with the decision-making component because the licensee did not use conservative assumptions to demonstrate that the battery would maintain minimum capacity until the next refueling outage |
| Site: | San Onofre  |
|---|---|
| Report | IR 05000361/2012003 Section 4OA2 |
| Date counted | Jun 30, 2012 (2012Q2) |
| Type: | Finding: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71152 |
| Inspectors (proximate) | K Clayton R Lantz J Reynoso J Laughlin G Warnick B Parks M Young B Correll S Achen |
| CCA | H.14, Conservative Bias |
| INPO aspect | DM.2 |
| ' | |
Finding - San Onofre - IR 05000361/2012003 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (San Onofre) @ 2012Q2
Self-Identified List (San Onofre)
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