05000261/FIN-2012002-01
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Finding | |
|---|---|
| Title | Failure to Implement Technical Specification Action Requirements Regarding B Battery Inoperability |
| Description | The inspectors identified a Green NCV of Technical Specification (TS) 3.8.4, DC Electrical Sources, when the licensee failed to comply with the action time following discovery of reasonable information to determine that Surveillance Requirement (SR) 3.8.4.6 had not been performed within its frequency plus 25 percent grace period for the B safety related battery. The B battery was inoperable due to the SR not being performed. The issue was documented in the corrective action program as Nuclear Condition Report (NCR) 511315. As corrective actions, the licensee shut down the plant and successfully performed the SR. The failure to declare in a timely manner that the TS surveillance requirement for the B safety related battery was not met, was a performance deficiency. This performance deficiency is more than minor because it is associated with the equipment performance attribute and adversely affected the Mitigating Systems Cornerstone objective to ensure the availability and reliability of systems that respond to initiating events to prevent undesirable consequences. Specifically, the licensee mistakenly extended the amount of time that they operated in Mode 1 with an inoperable safety related system. The significance of this finding was assessed in accordance with Inspection Manual Chapter 0609, Attachment 4. Using the Mitigating Systems Cornerstone column of Table 4a of Attachment 4, it was determined that the finding was of very low significance (Green) because the finding did not represent a loss of safety function and did not screen as potentially risk significant due to a seismic, flooding or severe weather initiating event. The inspectors determined this performance deficiency has a cross-cutting aspect in the Decision Making component of the Human Performance Area, because the licensee did not use conservative assumptions to determine operability of the B safety related battery. |
| Site: | Robinson  |
|---|---|
| Report | IR 05000261/2012002 Section 1R15 |
| Date counted | Mar 31, 2012 (2012Q1) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.15 |
| Inspectors (proximate) | A Nielsen R Hamilton L Lake J Hickey R Musser P Lessard C Scott J Rivera A Sengupta W Pursley |
| CCA | H.14, Conservative Bias |
| INPO aspect | DM.2 |
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Finding - Robinson - IR 05000261/2012002 | |||||||||||||||||||||||||||||||||||||||||
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Finding List (Robinson) @ 2012Q1
Self-Identified List (Robinson)
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