The NRC identified a Green non-cited violation of
10 CFR 50.49(f) for failing to qualify structures, systems, and components (
SSCs) (eight motor control centers) located in a radiation harsh environment in accordance with
IEEE Std. 323-1974 Section 5, Principles of Qualification. In response to this issue, the licensee performed an
operability determination and determined that the motor control centers (
MCCs) were operable based on the material similarity of the original
SSCs and the new
SSCs. This issue has been entered into the corrective action program as CR 1065894 The performance deficiency was determined to be more than minor because it was associated with the Equipment Performance attribute of the
Mitigating Systems Cornerstone and adversely affected the cornerstone objective of ensuring the availability, reliability, and capability of the safety related
AC Power System. Specifically, the failure to perform environmental qualification for
SSCs subject to a harsh environment, during which they must perform a safety function adversely affected the reliability of that equipment when called upon. This finding was not assigned a cross-cutting aspect because the issue did not reflect current licensee performance.
