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A self-revealed Green NCV of 10 CFR Part 5A self-revealed Green NCV of 10 CFR Part 50, Criterion V, Instructions, Procedures, and Drawings, was identified when the licensee failed to adequately implement surveillance procedures that affected safety-related equipment and plant stability. Specifically, the licensee failed to adequately implement testing and calibration procedures for pressurizer level instrumentation. This resulted in two letdown isolation signals, securing of pressurizer heaters, and a pressurizer level transient on March 29, 2018.surizer level transient on March 29, 2018.  +
23:59:59, 30 June 2018  +
05000482  +
23:59:59, 30 June 2018  +
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22:35:28, 10 September 2018  +
23:59:59, 30 June 2018  +
Failure to Adequately Implement Instrumentation and Controls Surveillance Procedures  +