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A finding of very low safety-significance … A finding of very low safety-significance and associated non-cited violation (NCV) of 10 CFR Part 50, Appendix B, Criterion V, Instructions, Procedures, and Drawings, was self-revealed when a nuclear control operator (NCO) failed to perform a procedure step, which resulted in the main feedwater regulating valve FW-7A partially closing while the reactor was at full power. Specifically, Step 6.11.2 of procedure SP-47-316A, Channel 1 (Red) Instrument Channel Test Channel Operational Test, directed the NCO to place the main feedwater regulating valve FW-7A in manual to preclude valve movement during a simulated portion of the test; however, the NCO marked the step not applicable and subsequently did not perform it. The licensee initiated condition reports (CRs) CR396649 and CR405809, performed an apparent cause evaluation (ACE), and initiated corrective actions (CAs) to address the issues identified in the causal evaluation. The finding was determined to be more than minor in accordance with Inspection Manual Chapter (IMC) 0612, Power Reactor Inspection Reports, Appendix B, Issue Screening, dated December 24, 2009, because it was associated with the Initiating Events Cornerstone attribute of human performance and adversely affected the cornerstone objective of limiting the likelihood of those events that upset plant stability and challenge critical safety functions during shutdown as well as power operations. Specifically, the failure to follow the procedure initiated a secondary-side plant transient. The inspectors determined the finding could be evaluated using the Significance Determination Process (SDP) in accordance with IMC 0609, Significance Determination Process, Attachment 0609.04, Phase 1 Initial Screening and Characterization of Findings, Tables 3b and 4a for the Initiating Events Cornerstone, dated January 10, 2008. The inspectors answered no to the Initiating Events Cornerstone Transient Initiator question and screened the finding as having very low significance (Green). The finding has a cross-cutting aspect in the area of human performance, Work Practices, because the personnel work practices did not support human performance. Specifically, licensee personnel failed to follow procedures (H.4(b)).nnel failed to follow procedures (H.4(b)).

Discovered date

23:59:59, 31 December 2010 +

Docket

05000305 +

Event date

23:59:59, 31 December 2010 +

Finding integer

4 +

Finding type

Non-cited violation +

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INPO aspect

WP.4 +

Identified by

Self-revealing +

Inspection Manual Chapter

NRC Inspection Manual 0609 + and NRC Inspection Manual 0612, Power Reactor Inspection Reports +

Inspection procedure

IP 71111.22 +

Inspection report

IR 05000305/2010005 +

Inspector

Michael Kunowski +, J Jandovitz +, M Phalen +, J Cassidy +, M Bielby +, D Passehl +, R Winter +, David Reeser +, P Cardona-Morales +, Chuck Zoia +, Kevin Barclay + and Robert Krsek +

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>.

00:40:53, 21 February 2018 +

Person