05000424/FIN-2009005-04
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Finding | |
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Title | Failure to properly maintain the approved fire protection program with regard to the relocation of the plant fire alarm annunciation signal outside of the MCRs |
Description | NRC identified a NCV of Vogtle Nuclear Plant Units 1 & 2 Operating License Condition 2.G, Fire Protection, for failure to properly maintain the NRC-approved fire protection program with regard to the location of the fire alarm computer audible and visual annunciation notification signal. Specifically, the licensee had implemented a plant change, in December 2006, for the fire alarm computer which relocated the fire alarm computer annunciation signal outside the continuously manned main control room to a clearance and tagging office which was not continuously manned. The plant change could have resulted in a delay of up to 2 minutes before the alarm would have been relayed to the main control room for actions to dispatch the fire brigade and initiate safe shutdown actions. The finding is more than minor because it is associated with the reactor safety, mitigating systems, cornerstone attribute of protection against external factors, i.e. fire, and it affected the objective of ensuring reliability and capability of systems (i.e., fire detection) that respond to initiating events. The finding was determined to be of very low safety significance (Green) in a Significance Determination Process Phase 1 analysis because the two minute delay had only minimum impact on the feasibility or reliability of the time critical operator actions and fire brigade performance in response to a fire. This violation was entered into the licensees corrective action program as Condition Report 2007110797. No cross cutting issue was identified, because the finding is not indicative of current plant performance |
Site: | Vogtle ![]() |
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Report | IR 05000424/2009005 Section 4OA5 |
Date counted | Dec 31, 2009 (2009Q4) |
Type: | NCV: Green |
cornerstone | Mitigating Systems |
Identified by: | NRC identified |
Inspection Procedure: | |
Inspectors (proximate) | E Crowe S Shaeffer A Nielsen J Hanna A Vargas-Mendez M Thomas G Wiseman B Caballero L Cain M Coursey T Chandler |
INPO aspect | |
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Finding - Vogtle - IR 05000424/2009005 | ||||||||||||||||||||||||||||||||||||||||||
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Finding List (Vogtle) @ 2009Q4
Self-Identified List (Vogtle)
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