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Title 10 CFR Part 50, Appendix B, Criterio … Title 10 CFR Part 50, Appendix B, Criterion V, Instructions, Procedures, and Drawings, requires, in part, that activities affecting quality shall be prescribed by documented procedures of a type appropriate to the circumstances and be accomplished in accordance with these procedures. The licensee established procedure QCOA 020204, Reactor Recirc Pump Trip, as the implementing abnormal operating procedure for responding to a reactor recirculation pump trip transient condition, an activity affecting quality. Procedure 020204, step D.3 states, in part, to insert control rods in sequence to TARGET IN position using control rod move sheets. Contrary to the above, on January 27, 2015, the licensee failed to insert control rods in sequence according to the control rod move sheets. Specifically, the reactor operators inserted control rods in step 20, and two rods in step 19, before a qualified nuclear engineer identified that the operators had missed inserting the rod in step 21. The licensee immediately entered QCOA 030004, Mispositioned Control Rods, and inserted the missed rod per the qualified nuclear engineers guidance. The licensee documented this issue in their CAP as IR 2443241. The inspectors determined that the finding was more than minor because it was associated with the Mitigating Systems Cornerstone attribute of human performance and adversely affected the cornerstone objective ensuring the reliability, availability, and capability of systems that respond to initiating events. The inspectors screened the finding using Exhibit 2 for Mitigating Systems in IMC 0609, Appendix A, The Significance Determination Process for Findings At Power, and answered, Yes to question C.3 because the finding represented a mismanagement of reactivity by operators. The inspectors were directed to IMC 0609, Appendix M, SDP Using Qualitative Criteria, and the finding screened as having very low safety significance (Green) because the licensee determined that there was very little effect on their margin to thermal limits. effect on their margin to thermal limits.
23:59:59, 31 March 2015 +
23:59:59, 31 March 2015 +
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Modification date"Modification date" is a predefined property that corresponds to the date of the last modification of a subject and is provided by <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Special_properties">Semantic MediaWiki</a>.
15:52:02, 30 May 2018 +
23:59:59, 31 March 2015 +