05000454/FIN-2010006-02
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Finding | |
|---|---|
| Title | Failure to Provide Adequate Guidance in Safe-Shutdown Procedures |
| Description | A finding of very low safety-significance and associated NCV of Technical Specification 5.4.1.c for Units 1 and 2 was identified by the inspectors for the licensee\'s failure to provide adequate guidance in safe shutdown procedures. Specifically, the licensee failed to provide adequate guidance to reenergize the 4 kiloVolt (kV) buses, which were required to power safe shutdown components to achieve hot shutdown in the event of a fire in Fire Zone 11.3-0. The licensee subsequently entered the issue into their corrective action program and initiated actions, which included recommendations to revise safe shutdown procedures to provide guidance for recovery actions to reenergize the required affected busses.
The inspectors determined that this finding was more than minor because the failure to provide adequate procedural guidance to reenergize the 4 kV buses could have potentially compromised the ability to safely shutdown the plant in the event of a fire in Fire Zone 11.3-0. This finding was of very low safety significance (Green) based on a Phase III significance determination analysis. The finding did not have a cross-cutting aspect because it was not reflective of current performance. |
| Site: | Byron  |
|---|---|
| Report | IR 05000454/2010006 Section 1R05 |
| Date counted | Dec 31, 2010 (2010Q4) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.05 |
| Inspectors (proximate) | R Daley R Langstaff R Winter A Dahbur L Kozak G Gulla N Melly |
| INPO aspect | |
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Finding - Byron - IR 05000454/2010006 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Byron) @ 2010Q4
Self-Identified List (Byron)
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