No findings of significance were identified. However, associated with the plant risk assessment review for testing the A
EDG (Work Week 2007-31) in accordance with surveillance test procedure (
STP)-125.002A, Diesel Generator Operability Test, the inspectors noted that dedicated manual operator risk management compensatory actions were being relied upon to allow the A
EDG to remain available. The dedicated operators were required to be stationed in the
EDG room area in order to reposition critical components manipulated during testing in the event of an
EDG emergency start demand. Establishing prescribed compensatory measures to restore the
EDG to service, if needed, allows the plant maintenance risk assessment to remain at Normal Risk versus Elevated Risk for a non-functional
EDG. Further details related to the conduct of this surveillance test are discussed in Section 1R22 of this report. At the time of the inspection, the licensee could not provide complete information to support that these actions could be taken within the time necessary for the
EDG to satisfy its safety function as assumed in the
Probabilistic Risk Assessment (
PRA) success criteria. Pending further NRC review of this issue and additional information from the licensee, this issue is identified as unresolved item (
URI)
05000395/2007004-01, Review Risk Assessment Credit for Dedicated
Manual Operator Actions During
EDG Surveillance Testing.
