05000275/FIN-2009003-07
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Finding | |
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| Title | Licensee-Identified Violation |
| Description | Title 10 of the Code of Federal Regulations 50, Appendix B, Criteria XI, Test Control, required Pacific Gas and Electric to establish a test program to assure that all testing required to demonstrate that structures, systems, and components will perform satisfactorily in service is performed in accordance with written test procedures which incorporate the requirements and acceptance limits contained in applicable design documents. Contrary to this, on March 9, 2009, Pacific Gas and Electric discovered that emergency diesel generator surveillance testing did not reflect actual design basis loading conditions. Engineers discovered that the power factor requirements of Surveillance Test Procedures STP M-9G, Diesel Generator 24-Hour Load Test and Hot Restart Test, and STP M-9D1, Diesel Generator Full Load Rejection Test; and Technical Specification Surveillance Requirements SR 3.8.1.10 and SR 3.8.1.12 were not adequate, based on reviews of Calculations 015-DC, Diesel Generator Loading for 4160V Vital Bus Loads, Unit 1, Revision 19 and 125-DC, Diesel Generator Loading for 4160V Vital Bus Loads, Unit 2, Revision 13. Pacific Gas and Electric entered SR 3.0.3 and implemented administrative controls in accordance with NRC Administrative Letter 98-10, Disposition of Technical Specifications that are Insufficient to Assure Plant Safety. Pacific Gas and Electric revised the surveillance test procedures and successfully completed the surveillance tests for all emergency diesel generators June 21, 2009. The licensee entered this condition into the correction action program as Notification 50232184, Diesel Generator Power Factor. This finding is of very low safety significance because the condition did not screen as potentially risk significant due to a seismic, flooding, or severe weather initiating event |
| Site: | Diablo Canyon  |
|---|---|
| Report | IR 05000275/2009003 Section 4OA7 |
| Date counted | Jun 30, 2009 (2009Q2) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Licensee-identified |
| Inspection Procedure: | |
| Inspectors (proximate) | G Guerra M Brown M Peck V Gaddy |
| INPO aspect | |
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Finding - Diablo Canyon - IR 05000275/2009003 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Diablo Canyon) @ 2009Q2
Self-Identified List (Diablo Canyon)
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