05000361/FIN-2009004-02
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Finding | |
|---|---|
| Title | Failure to Assess and Manage Risk for Maintenance that Could Impact Offsite Power Components |
| Description | The inspectors identified a cited violation of 10 CFR 50.65(a)(4) for the failure of work control and operations personnel to adequately assess and manage the increase in risk associated with maintenance activities. Specifically, on August 25-27, 2009, work control and operations personnel failed to adequately assess and manage the increase in risk associated with maintenance activities in or near the electrical switchyard and offsite power components. Due to the licensees failure to restore compliance from the previous NCV 05000361;05000362/2009003-04 within a reasonable time after the violation was identified, this violation is being cited in a Notice of Violation consistent with Section VI.A of the NRC Enforcement Policy. This finding was entered into the licensees corrective action program as Nuclear Notifications NNs 200556120 and 200559128. The failure to include maintenance activities in or near the electrical switchyard and offsite power components in the on-line risk assessment was a performance deficiency. 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, 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 re-perform 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 1 x 10-6 and 1 x 10-7, respectively. This finding has a crosscutting aspect in the area of problem identification and resolution associated with corrective action program because the licensee did not take appropriate corrective actions to address safety issues and adverse trends in a timely manner, commensurate with their safety significance and complexity P.1(d) |
| Site: | San Onofre  |
|---|---|
| Report | IR 05000361/2009004 Section 1R13 |
| Date counted | Sep 30, 2009 (2009Q3) |
| Type: | Violation: Green |
| cornerstone | Initiating Events |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.13 |
| Inspectors (proximate) | M Haire N O'Keefe R Kellar A Allen G Warnick J Reynosoc Alldredgec Osterholtz E Uribe G Guerra G Warnick J Reynoso J Tapp J Watkins N Greene P Elkmann R Lantz S Achen S Hedger Z Hollcraft |
| CCA | P.3, Resolution |
| INPO aspect | PI.3 |
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Finding - San Onofre - IR 05000361/2009004 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (San Onofre) @ 2009Q3
Self-Identified List (San Onofre)
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