A Green, self-revealing finding (
FIN) was identified in that an inadequate procedure resulted in a failure to adequately retain a 1-1
Emergency Diesel Generator (
EDG) room
damper after
louver adjustment. Specifically, the adjustment of the 1-1
EDG upper
damper (
1VS-D-22-2A) in April 2010 led to retention hardware not being sufficiently secure to prevent
damper failure and resulted in the linkage failing to open the upper
dampers. This was selfrevealing during a crew investigation for a 1-1
EDG alarm on September 5,2010. This issue was entered into the licensee\'s corrective action program under CR 10-82257. Traditional enforcement does not apply because the issue did not have an actual safety consequence or the potential for impacting NRC\'s regulatory function, and was not the result of any willful violation of NRC requirements. The finding is more than minor because it is associated with the procedure quality attribute of the
Mitigating Systems cornerstone and affects the availability, reliability and capability of systems that respond to
initiating events to prevent undesirable consequences. In accordance with
IMC 0609.04 (Table 4a), Phase 1 - Initial Screening and Characterization of Findings, the finding was determined to be of very low safety significance (Green). The cause of this finding relates to the cross-cutting aspect of Human Performance, Resources, in that
FENOC did not provide complete procedures to conduct the
damper adjustment and retention. [H.2.(c)]