TS 3.8.1.1 Electrical Power Systems, Alternating Current (
AC) Sources for Modes 1-4 requires, in part, that the two separate and independent
EDGs shall be loaded to an indicated target value of 4676 kW (between 4600-4700 kW) and maintained for
2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> during a
24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> run at least once every 18 months (
Surveillance Requirement (SR) 4.8.1.1.2.g.7.a). Contrary to this, on August 12, 2009, the licensee identified during surveillance testing that the B
EDG asfound maximum loading was 4575 kW, and B
EDG could not be operated within the maximum TS specified load range. As a result, B
EDG was declared
inoperable. The violation was determined to be of very low safety significance because B
EDG was able to meet the design basis limiting, largest short term load (less than two hours) of 4390 kW. The licensee adjusted the fuel rack stop, completed the surveillance test satisfactorily, and revised the mechanical maintenance procedure to address loading measurement instrumentation and the post maintenance test loading range. The licensee addressed this issue in the corrective action program as CR-09-03120
