05000361/FIN-2010002-04
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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), Requirements for Monitoring the Effectiveness of Maintenance at Nuclear Power Plants, involving multiple instances where operations and work control personnel failed to adequately assess and implement appropriate risk management activities. Specifically, between February 18, and February 23, 2010, operations and work control personnel failed to adequately assess and manage the increase in risk associated with maintenance activities in the electrical switchyard. Following the inspectors identification of the findings, the licensee adequately assessed and managed the increase in risk for the maintenance activities. This issue was entered into the licensees corrective action program as Nuclear Notifications NNs 200801929 and 200805635. The finding is greater than minor since it was similar to both more than minor Examples 7.e and 7.f in NRC Inspection Manual Chapter 0612, Appendix E, Examples of Minor Issues, because when the activities were correctly assessed plant procedures required risk management actions to be taken. The finding is associated with the Initiating Events Cornerstone. The inspectors determined that the licensee does not maintain a shutdown probabilistic risk analysis model, and as such, an incremental core damage probability cannot be estimated for the plant conditions that existed at the time of the performance deficiency. For this reason, the inspectors determined that Manual Chapter 0609, Appendix K, Maintenance Risk Assessment and Risk Management Significance Determination Process, Flowchart 2, could not be used to determine the risk significance the finding. Using the qualitative review process of Manual Chapter 0609, Appendix M, Significance Determination Process Using Qualitative Criteria, the finding is determined to have very low safety significance because the finding did not result in any additional loss of defense in depth systems. This finding has a crosscutting aspect in the area of human performance associated with the work practices because the licensee failed to define and effectively communicate expectations regarding procedural compliance and that personnel follow procedure |
| Site: | San Onofre  |
|---|---|
| Report | IR 05000361/2010002 Section 1R13 |
| Date counted | Mar 31, 2010 (2010Q1) |
| Type: | NCV: Green |
| cornerstone | Initiating Events |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.13 |
| Inspectors (proximate) | R Lantz P Elkmann D Allen J Reynoso J Josey G Warnick B Rice W Schaup |
| CCA | H.8, Procedure Adherence |
| INPO aspect | WP.4 |
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Finding - San Onofre - IR 05000361/2010002 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (San Onofre) @ 2010Q1
Self-Identified List (San Onofre)
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