05000261/FIN-2008004-01
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Finding | |
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| Title | Failure to adequately assess risk when assuming availability prior to performing post maintenance testing |
| Description | The inspectors identified a Green non-cited violation (NCV) of 10 CFR 50.65(a)(4) for the failure on August 14 to adequately assess plant risk as Yellow after post-maintenance valve lineups failed to restore service water cooling to the B emergency diesel generator (EDG). As a result, the licensee incorrectly assumed that the B EDG was available to perform its safety function prior to performing a post maintenance test, and thereby performed an inadequate risk assessment which lowered plant risk from Yellow to Green status. As an immediate corrective action, the licensee implemented Operations Night Order 08-10 which required interim measures be performed to ensure that plant risk will not be downgraded until the component being returned to service has been proven to be available by performing a functional verification. The licensee also plans to proceduralize this interim measure into procedure OMM-048, Work Coordination and Risk Assessment. This issue was entered into the licensees corrective action (CA) program for resolution. This finding was more than minor and affected the Mitigating Systems Cornerstone, because it is similar to example 7.f of Inspection Manual Chapter (IMC) 0612, Appendix E, Examples of Minor Issues. In example 7.f this finding meets the Not minor if criteria because if the licensee had correctly assessed the risk that may result from performing the maintenance activity of postmaintenance testing, that risk assessment would have placed the plant into a higher risk category (i.e. from Green to Yellow risk). The finding has a crosscutting aspect in the area of Human Performance because the licensee did not ensure that complete and accurate procedures were available and adequate to assure nuclear safety, in that the licensee failed to provide clear guidance in procedure OMM-048, Work Coordination and Risk Assessment, for declaring equipment available as it relates to performing plant risk assessments. (H.2(c)) (Section 1R13 |
| Site: | Robinson  |
|---|---|
| Report | IR 05000261/2008004 Section 1R13 |
| Date counted | Sep 30, 2008 (2008Q3) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.13 |
| Inspectors (proximate) | R Hagar R Musser E Morris |
| CCA | H.7, Documentation |
| INPO aspect | WP.3 |
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Finding - Robinson - IR 05000261/2008004 | |||||||||||||||||||||||||||||||||
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Finding List (Robinson) @ 2008Q3
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