05000261/FIN-2016001-02
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Finding | |
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| Title | Failure to Scope Safety-Related Auxiliary Building Ventilation Fans into the Maintenance Rule |
| Description | The inspectors identified a Green NCV of 10 CFR 50.65(b)(1), for the licensees failure to include safety-related structures, systems and components (SSCs) within the scope of the maintenance rule program. Specifically, the licensee failed to include auxiliary building ventilation fans, which are required to remain functional during and following a design bases event to mitigate the consequences of an accident, within the scope of the maintenance rule monitoring program. The licensee initiated corrective actions to include the auxiliary building ventilation exhaust fans within the maintenance rule monitoring program. The licensee entered this issue into their CAP as CR 1997952. The failure to appropriately scope the safety-related auxiliary building ventilation fans within the maintenance rule was a performance deficiency. This performance deficiency was determined to be more than minor because it was associated with the Mitigating Systems Cornerstone attribute of equipment performance and adversely affected the cornerstone objective to ensure the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. Specifically, the failure to include auxiliary building ventilation fans in the maintenance rule affects the licensees ability to effectively monitor the performance or condition of the SSCs such that SSCs remain capable of fulfilling their intended function. Using IMC 0609, Appendix A, issued June 19, 2012, SDP for Findings At-Power, the inspectors determined that this finding was of very low safety significance (Green) because the finding did not represent an actual loss of function of one or more non-TS trains of equipment designated as high safety-significant in accordance with the licensees maintenance rule program for greater than 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. The finding does not have a cross-cutting aspect since the failure to scope this equipment into the maintenance rule was not recognized during the initial maintenance rule scoping activities in 1997 and, as a result, is not indicative of current licensee performance. |
| Site: | Robinson  |
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| Report | IR 05000261/2016001 Section 1R12 |
| Date counted | Mar 31, 2016 (2016Q1) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.12 |
| Inspectors (proximate) | A Nielsen C Scott D Bacon G Hopper J Parent K Ellis W Loo |
| Violation of: | 10 CFR 50.65 10 CFR 50.65(b) |
| INPO aspect | |
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Finding - Robinson - IR 05000261/2016001 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Robinson) @ 2016Q1
Self-Identified List (Robinson)
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