The inspectors identified a Green non-cited violation (
NCV) of
Vermont Yankee
Technical Specifications Section 6.4, Procedures, for
Vermont Yankees failure to take action to correct a specific and foreseen malfunction of a plant component. Specifically,
Vermont Yankee failed to initiate a condition report (CR) for an adverse condition associated with water accumulating in the turbine building supply fan housing plenum area, which led to the inoperability of the A
emergency diesel generator (
EDG) on January 21, 2009 for four hours.
Vermont Yankee operations and maintenance personnel stopped the source of the water accumulation and restored the A
EDG to
operable status. This
NCV has since been entered into the
Vermont Yankee corrective action program (
CAP). The finding was more than minor because it was associated with the Equipment Performance attribute of the
Mitigating Systems cornerstone; and, it affected the cornerstone objective of ensuring the reliability, availability, and capability of systems that respond to
initiating events to prevent undesirable consequences. Specifically, the A
EDG was rendered
inoperable for approximately four hours, but less than the sevenday
Technical Specifications (TS) 3.10 allowed outage time. The finding had a crosscutting aspect in the Corrective Action Program component of the Problem Identification and Resolution (
PI&R) cross-cutting area because
Vermont Yankee did not identify within the
CAP the rising water level in the turbine building supply fan housing plenum area in a timely manner commensurate with its safety significance
P.1(a). (Section 1R12)
