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
