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An NRC-identified finding of very low safe … An NRC-identified finding of very low safety significance and an associated Severity Level IV NCV of the reporting requirements of 10 CFR 50.72(b)(3)(xiii) were identified following the inspectors' review of licensee corrective actions for a previous occurrence of a reportable condition that took place on May 26, 2014. That event was reported to the NRC as required (Event Notification 49546), and the licensee developed applicable corrective actions within their Corrective Action Program (CAP). While reviewing the circumstances surrounding that issue, the inspectors identified that on May 21, 2014, the licensee's control room overhead annunciator system had suffered a similar malfunction. The licensee's initial reviews of the May 21, 2014, issue, however, determined that the matter was not reportable, and no report to the NRC Operations Center was made at that time. The event was eventually reported to the NRC (Event Notification 50252) on July 3, 2014, following discussions with the inspectors. The finding was determined to be of more than minor significance because it was associated with the Mitigating Systems cornerstone and directly impacted the cornerstone objective to ensure the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. Specifically, the inspectors had previously determined that the underlying technical issue surrounding this event involved a finding of very low safety significance, and documented that finding in NRC IR 05000346/2014003 (FIN 05000346/201400305; ADAMS Accession No. ML14212A468). That issue, involving the licensee's failure to assign appropriate work priority to corrective actions associated with their annunciator system, resulted in additional malfunctions of the control room overhead annunciator system, one of which was the event that occurred on May 21, 2014. The inspectors evaluated the finding using IMC 0609, Appendix A, The Significance Determination Process for Findings-At-Power. Using Exhibit 2, which contains the screening questions for the Mitigating Systems cornerstone of reactor safety, the inspectors determined that the finding screened as very low safety significance because all screening questions were, answered No. This finding was determined to have a cross-cutting aspect in the area of human performance, documentation, because the licensee's reference material related to NRC event reporting that was available to the on-shift operations crew on May 21, 2014, did not contain comprehensive guidance relative to the event that occurred.dance relative to the event that occurred.

Discovered date

23:59:59, 30 September 2014 +

Docket

05000346 +

Document

IR 05000346/2014003 +

ENS

ENS 49546 + and ENS 50252 +

Event date

23:59:59, 30 September 2014 +

Finding integer

2 +

Finding type

Non-cited violation +

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INPO aspect

WP.3 +

Identified by

NRC identified +

Inspection Manual Chapter

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

Inspection procedure

IP 71153, Event Followup +

Inspection report

IR 05000346/2014003 + and IR 05000346/2014004 +

Inspector

Jamnes Cameron +, Daniel Kimble +, Phillip Smagacz +, Thomas Briley + and Matthew Mitchell +

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>.

17:24:32, 1 October 2017 +

Person