05000482/FIN-2009005-04
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Finding | |
|---|---|
| Title | Failure to Incorporate Requirements of Regulatory Guide 1.182 into Daily Shutdown Risk Assessment |
| Description | The inspectors identified a noncited violation of 10 CFR 50.65(a)(4) involving the failure to adequately perform shutdown risk assessments during Refueling Outage 17. Between October 10 and November 17, 2009, Wolf Creek did not appropriately consider electrical power, decay heat removal, and containment when assessing shutdown risk. This changed the outcome or color of the qualitative calculation on several occasions. The licensee entered this issue in their corrective action program as Condition Reports 22295 and 22296. The failure to meet shutdown risk assessment requirements in the daily shutdown risk assessment process is a performance deficiency. The inspectors determined this finding was associated with the Mitigating Systems Cornerstone and was more than minor because it involved incorrect risk assessment assumptions by omitting requirements specified in committed guidance without providing justification for that omission. Such errors of omission have the potential to change the outcome of the licensees maintenance risk assessment as described above. Per Inspection Manual Chapter 0609, Appendix K, Maintenance Risk Assessment and Risk Management Significance Determination Process, licensees who only perform qualitative analyses of plant configuration risk due to maintenance activities, the significance of the deficiencies must be determined by an internal NRC management review using risk insights where possible in accordance with Inspection Manual Chapter 612, Power Reactor Inspection Reports. The NRC management review concluded that this finding was of Green safety significance because missing risk management actions did not result in loss of key shutdown risk functions. Additionally, the cause of the finding has a human performance crosscutting aspect in the area associated with the resources. Specifically, Wolf Creek did not ensure that Procedure APF 22B-001-02 was complete, accurate, and up-to-date H.2(c) (Section 1R13) |
| Site: | Wolf Creek  |
|---|---|
| Report | IR 05000482/2009005 Section 1R13 |
| Date counted | Dec 31, 2009 (2009Q4) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.13 |
| Inspectors (proximate) | G Vasquez J Drake P Jayroe R Kopriva S Alferink A Fairbanks C Alldredge C Cauffman C Long C Peabody D Graves D Loveless G Miller |
| CCA | H.7, Documentation |
| INPO aspect | WP.3 |
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Finding - Wolf Creek - IR 05000482/2009005 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Wolf Creek) @ 2009Q4
Self-Identified List (Wolf Creek)
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