05000373/FIN-2010005-02
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Finding | |
|---|---|
| Title | Failure to Foolow Performance Centered Monitoring Process Procedure |
| Description | A finding of very low safety significance (Green) and an associated NCV of Technical Specification (TS) 5.4.1, Procedures, was self-revealed, for the failure to follow procedural guidance specified in procedure MA-AA-716-210, Performance Centered Monitoring Process. Specifically, a control relay for the Unit 2 Division 3 switchgear room ventilation was inappropriately classified for its preventive maintenance schedule and had a recommended replacement frequency of as required instead of the 10 year frequency required, by procedure, for this type of equipment. As a result, when this relay failed, it caused the switchgear room ventilation system (VD) to trip and the unexpected unavailability and inoperability of the Unit 2 high pressure core spray (HPCS) system. The inspectors determined that the finding was of more than minor significance because it affected the Mitigating Systems Cornerstone attribute of Human Performance (human error pre-event), and it affected the cornerstone objective to ensure availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. Specifically, since HPCS is a single train, this constituted a loss of safety function. The finding was determined to be of very low safety significance using an SDP Phase 3 analysis. As part of the corrective actions for this issue, the licensee re-classified the control relay to Critical, high duty cycle, to help ensure that replacement of the component occurs at the appropriate time-based frequency. The inspectors did not identify a cross-cutting aspect associated with this finding. |
| Site: | LaSalle  |
|---|---|
| Report | IR 05000373/2010005 Section 4OA3 |
| Date counted | Dec 31, 2010 (2010Q4) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71153 |
| Inspectors (proximate) | G Roach N Shah R Jickling F Ramirez K Riemer B Palagi C Moore J Neurauter J Yesinowski V Meghani R Temps M Learn R Edwards S Bakhsh C Lipa |
| INPO aspect | |
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Finding - LaSalle - IR 05000373/2010005 | |||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (LaSalle) @ 2010Q4
Self-Identified List (LaSalle)
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