05000416/FIN-2010002-06
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Finding | |
|---|---|
| Title | Licensee-Identified Violation |
| Description | Technical Requirements Manual (TRM) section 6.2.8 requires that if a fire barrier assembly is inoperable and the fire detection system on one side of the inoperable assembly is inoperable a continuous fire watch must be established immediately. Contrary to this, on February 26, 2010 the licensee identified the fire detection system for fire zone 2-14 had failed its surveillance and was declared inoperable. The control room supervisor established an hourly fire watch based on TRM section 6.2.1. During shift turnover it was discovered that previously the auxiliary building elevator door for 103 foot elevation of the auxiliary building was declared inoperable. This was a barrier assembly that was in the same area as fire zone 2-14 and a continuous fire watch should have been established rather then a hourly fire watch. The control room supervisor immediacy established a continuous fire watch to comply with the TRM. This issue was documented in the licensees corrective action program in condition report CR GGN-2010-01291. The senior reactor analyst from region IV performed a bounding evaluation of the change in risk caused by substituting a one-hour roving fire watch for a continuous fire watch. Based on the short exposure period and the 45-minute fire wrap in use in the fire compartments of concern, the analyst determined that the change in risk was significantly less than 1E-6. Therefore, this finding was of very low safety significance (Green) |
| Site: | Grand Gulf  |
|---|---|
| Report | IR 05000416/2010002 Section 4OA7 |
| Date counted | Mar 31, 2010 (2010Q1) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Licensee-identified |
| Inspection Procedure: | |
| Inspectors (proximate) | G Guerra R Smith A Barrett W Sifre M Young V Gaddy B Rice |
| INPO aspect | |
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Finding - Grand Gulf - IR 05000416/2010002 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Grand Gulf) @ 2010Q1
Self-Identified List (Grand Gulf)
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