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The licensee identified a NCV of the Dresd … The licensee identified a NCV of the Dresden Station Improved Technical Specification 3.3.2.1, Control Rod Block Instrumentation, of very low safety significance (Green) for the failure to declare RBM channel 8 inoperable and take actions in accordance with the requirements of Technical Specification 3.3.2.1, Required Actions A.1 and B.1. Dresden Station Improved Technical Specification 3.3.2.1, Control Rod Block Instrumentation, states, in part, the control rod block instrumentation for each function in Table 3.3.2.1-1, shall be OPERABLE. Technical Specification 3.3.2.1 Required Action A.1 requires an inoperable RBM channel to be restored to operable status within 24 hours; otherwise the affected channel must be placed in trip within 1 hour per Required Action B.1. Contrary to the above, the licensee failed to declare Unit 2 RBM channel 8 inoperable and take actions in accordance with the requirements of TS 3.3.2.1 Required Action A.1 and B.1 when the licensee was unable to complete Surveillance Requirement 3.3.2.1.1 and possessed other indications that RBM channel 8 was not functioning properly. Specifically, the operators entered into a specified condition of Technical Specification 3.3.2.1 when they selected and operated non-peripheral control rods with reactor power greater than 30 percent rated thermal power coincident with RBM channel 8 inoperable. The licensee generated IR 1531052 and IR 1545143 to address this issue. The inspectors completed a Phase 1 significance determination of this issue using IMC 0609, Significance Determination Process, Attachment 0609.04, Initial Characterization of Findings, dated July 1, 2012 and IMC 0609, Appendix A, The Significance Determination Process (SDP) For Findings At-Power, dated July 1, 2012. The inspectors answered NO to all questions in Exhibit 2, Section C, Reactivity Control Systems. Therefore the finding screened as Green (very low safety significance).d as Green (very low safety significance). +

Discovered date

23:59:59, 30 September 2013 +

Docket

05000237 + and 05000249 +

Event date

23:59:59, 30 September 2013 +

Finding integer

3 +

Finding type

Non-cited violation +

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Hours

2.777778e-4 d (0.00667 hours, 3.968254e-5 weeks, 9.132e-6 months) + and 1.157407e-5 d (2.777778e-4 hours, 1.653439e-6 weeks, 3.805e-7 months) +

Identified by

Licensee-identified +

Inspection Manual Chapter

NRC Inspection Manual 0609 + and NRC Inspection Manual 0609/Appendix A, The Significance Determination Process (SDP) for Findings At-Power +

Inspection report

IR 05000237/2013004 +

Inspector

Patricia Pelke +, E Sanchez-Santiago +, D Lords +, Gregory Roach +, D Melendez-Colon +, Vijay Meghani +, Atif Shaikh +, Tony Go + and Robert Elliott +

Issue report

AR 01531052 + and AR 01545143 +

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>.

15:47:59, 30 May 2018 +

Person