05000482/FIN-2008010-05
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Finding | |
|---|---|
| Title | Operator Actions Affect the Ability to Operate Post-Fire Safe Shutdown Equipment |
| Description | The team identified a non-cited violation of License Condition 2.C.(5), Fire Protection, for operator actions taken in response to fire damage in Fire Area A-27 (Reactor Trip Switchgear Room 1403) that remove the ability to remotely operate equipment required for post-fire safe shutdown. Specifically, Procedure OFN KC-016, Fire Response, directs operators to remove the Train B 125 Vdc control power supply if a fire in Fire Area A-27 causes the Train B power-operated relief valve to spuriously open and its associated block valve fails to close. Removing the Train B 125 Vdc control power supply affects several of the functions credited for post-fire safe shutdown in Fire Area A-27. The licensee entered this issue into the corrective action program as Condition Report 2008-005210. Removing the ability to remotely operate equipment required for post-fire safe shutdown, as specified in Procedure OFN KC-016, is a performance deficiency. This finding is more than minor because it is associated with the Protection Against External Factors attribute of the Mitigating Systems Cornerstone and could affect the availability, reliability, and capability of systems that respond to fire events to prevent undesirable consequences. The team determined the risk significance using Manual Chapter 0609, Appendix F, Fire Protection Significance Determination Process. This finding is of very low safety significance since all fire ignition sources screened out and a hot gas layer would not form in this area. This finding was not assigned a cross-cutting aspect because the cause was not representative of current performance. (Section 1R05.07.b(2) |
| Site: | Wolf Creek  |
|---|---|
| Report | IR 05000482/2008010 Section 1R05 |
| Date counted | Dec 31, 2008 (2008Q4) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.05 |
| Inspectors (proximate) | A Dahbur J Adams J Mateychick N Okonkwo |
| INPO aspect | |
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Finding - Wolf Creek - IR 05000482/2008010 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Wolf Creek) @ 2008Q4
Self-Identified List (Wolf Creek)
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