05000361/FIN-2009003-04
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Finding | |
|---|---|
| Title | Failure to Assess and Manage Risk for Electrical Switchyard Impacting Maintenance |
| Description | The inspectors identified a noncited violation of 10 CFR 50.65(a)(4) for the failure of work control and operations personnel to include maintenance activities in or near the electrical switchyard and offsite power components in the on-line risk assessment. This finding was entered into the licensees corrective action program as Nuclear Notification 200402733. This finding is greater than minor because the licensees risk assessment failed to consider maintenance activities that could increase the likelihood of initiating events such as work in or associated with offsite power sources and the electrical switchyard. This finding is associated with the Initiating Events Cornerstone. In accordance with Inspection Manual Chapter 0609, Appendix K, Maintenance Risk Assessment and Risk Management Significance Determination Process, step 4.1.1, the inspectors had the licensee reperform the assessment, correcting the errors that rendered the original risk assessment inadequate. The finding is determined to have very low safety significance because the incremental core damage probability deficit and the incremental large early release probability deficit, used to evaluate the magnitude of the error in the licensees inadequate risk assessment, were less than 1E-6 and 1E-7, respectively. This finding has a crosscutting aspect in the area of human performance associated with resources because the licensee did not ensure that procedures and processes were adequate to properly assess and manage the risk associated with on-line maintenance H.2(c) |
| Site: | San Onofre  |
|---|---|
| Report | IR 05000361/2009003 Section 1R13 |
| Date counted | Jun 30, 2009 (2009Q2) |
| Type: | NCV: Green |
| cornerstone | Initiating Events |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.13 |
| Inspectors (proximate) | L Ricketson J Reynoso W Sifre G Warnick M Young A Fairbanks M Catts B Correll E Ruesch C Ryan T Buchanan A Vegel |
| CCA | H.7, Documentation |
| INPO aspect | WP.3 |
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Finding - San Onofre - IR 05000361/2009003 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (San Onofre) @ 2009Q2
Self-Identified List (San Onofre)
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