05000456/FIN-2012002-04
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Finding | |
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| Title | |
| Description | 10 CFR 50.65, Requirements for Monitoring the Effectiveness of Maintenance at Nuclear Power Plants, required, in part: 10 CFR 50.65(a)(1), ... Each holder of an operating license for a nuclear power plant under this part. . .shall monitor the performance or condition of structures, systems, or components against licensee-established goals, in a manner sufficient to provide reasonable assurance that the SSCs, as defined in paragraph (b) of this section, are capable of fulfilling their intended functions. 10 CFR 50.65(a)(2), ... Monitoring as specified in (a)(1) of this section is not required where it has been demonstrated that the performance or condition of a structure, system, or component is being effectively controlled through the performance of appropriate preventative maintenance, such that the structure system, or component remains capable of performing its intended function. For the associated HELB barrier dampers, the licensee selected performance criteria related to attributes of a periodic 18-month inspection activity. The inspection activity inspected the material condition of the damper, damper frame, and fusible links. The inspectors questioned whether the licensees performance criteria based only on conducting visual inspection preventative maintenance activities was acceptable based upon the following: The concern that the inspection activity may not have the capability to detect failures that were not visually observable (e.g., the amount the spring utilized in the dynamic dampers relax over time); The inability to inspect the dampers entire surface area in the closed position, and; The use of past damper performance reliability that was based in large part upon past inspections and not upon actual demand testing since the licensee had discontinued damper testing based upon a review of the stations Fire Protection program licensing requirements. This URI will remain open pending the inspectors review of the licensees performance monitoring criteria against the 10 CFR 50.65 maintenance rule requirements. |
| Site: | Braidwood  |
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| Report | IR 05000456/2012002 Section 1R12 |
| Date counted | Mar 31, 2012 (2012Q1) |
| Type: | URI: |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.12 |
| Inspectors (proximate) | A Garmoe B Jose E Duncan J Benjamin J Gilliam M Holmberg M Perrya Garmoeb Bartlett D Szwarc E Duncan J Benjamin J Robbins M Perry R Langstaff R Ng T Go V Meghania Garmoee Duncan J Benjamin M Holmberg M Perry R Jickling R Ng T Daun |
| INPO aspect | |
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Finding - Braidwood - IR 05000456/2012002 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Braidwood) @ 2012Q1
Self-Identified List (Braidwood)
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