05000416/FIN-2008002-08
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Finding | |
|---|---|
| Title | Licensee-Identified Violation |
| Description | TS 3.8.1 requires two offsite power sources to supply the onsite Class 1E electric power distribution system. Contrary to this requirement, control room operators discovered that feeder voltage was greater than the TS limit for both 500 kV feeders causing both sources to be inoperable. Upon further investigation by the plant personnel it was determined that for approximately 25 hours2.893519e-4 days <br />0.00694 hours <br />4.133598e-5 weeks <br />9.5125e-6 months <br /> during the previous 2 days the plant was in violation of the TS requirement. This resulted in missed surveillances, which are required by TS Action Statement 3.8.1.A. The plant performed an operability evaluation of safety related equipment supplied by these safety buses and determined for the short period of time that these voltages were in excess of TS limits the equipment remained operable. This issue was documented in the licensees CAP program as CR-GGN-2008-1499 and 2008-1508. This finding is of very low safety significance because there was no actual loss of operability. |
| Site: | Grand Gulf  |
|---|---|
| Report | IR 05000416/2008002 Section 4OA7 |
| Date counted | Mar 31, 2008 (2008Q1) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Licensee-identified |
| Inspection Procedure: | |
| Inspectors (proximate) | R Deese P Elkmann R Smith A Barrett D Bollock |
| INPO aspect | |
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Finding - Grand Gulf - IR 05000416/2008002 | |||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Grand Gulf) @ 2008Q1
Self-Identified List (Grand Gulf)
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