The inspectors identified a non-cited violation (
NCV) of
10 CFR 50.65(a)(1), Requirements for Monitoring the Effectiveness of Maintenance at Nuclear Power Plants, because the licensee did not establish appropriate corrective actions to address the potential for a transformer deluge initiation due to
water hammer, and provide reasonable assurance that the system was capable of fulfilling its intended function and could return to monitoring under
10 CFR 50.65(a)(2). This issue was entered into the licensees corrective action program. The finding is more than minor. In accordance with
IMC 0612, Appendix E, Examples of Minor Issues, Section 7, Maintenance Rule a(1) and a(2) violations are not minor because they involve structures, systems, and components (
SSCs) that have demonstrated some degraded performance or condition. The finding was determined to be of very low safety significance (Green) because it does not contribute to both the likelihood of a
reactor trip and the likelihood that mitigation equipment or functions will not be available. (Section 1R12)
