A self-revealing finding was identified for inadvertent operation of the Unit 1 Standby Makeup Pump (
SMP) during the performance of a
job performance measure (
JPM). The licensed operator performing the
JPM operated plant equipment which was contrary to procedural requirement to only simulate equipment operation. The inspectors determined that operation of plant equipment during the performance of a
JPM was a performance deficiency (
PD). The
PD was more than minor because it was associated with the
Mitigating Systems attribute of Equipment Performance and adversely affected cornerstone objective because the
SMP was unavailable to perform its safety function during unplanned testing and maintenance. The finding was determined to be of very low safety significance (Green), based on the results of a detailed risk assessment and an external events. The finding was not assigned a cross cutting aspect because the
PD resulted from an isolated human performance error.
