Browse wiki

The NRC identified a non-cited violation o … The NRC identified a non-cited violation of 10 CFR 50.65(b)(2)(i) for the licensees failure to monitor non-safety-related structures, systems, or components that are relied upon to mitigate accidents or transients. Specifically, the Unit 1 decay heat removal pump room level switches, which were credited for mitigating the effects of internal flooding, were not being monitored as part of the maintenance rule. The licensees corrective actions included developing a preventative maintenance task to test the operation of the level switches. This issue was entered into the corrective action program as Condition Report CR-ANO-1-2013-03168. The inspectors determined that the failure to effectively monitor the performance of both Unit 1 decay heat removal room level switches in accordance with 10 CFR 50.65(a)(1) was a performance deficiency. The performance deficiency was determined to be more than minor because it affected the equipment performance attribute of the mitigating systems cornerstone and directly affected the cornerstone objective of ensuring the availability and reliability of systems that respond to initiating events to prevent undesirable consequences, in that it called into question the reliability of flood mitigation equipment. The inspectors used Inspection Manual Chapter 0609, Attachment 0609.04, Initial Characterization of Findings, dated June 19, 2012, and Appendix A, The Significance Determination Process (SDP) for Findings At-Power, dated June 19, 2012, to evaluate the significance of the finding. The inspectors determined the finding was of very low safety significance (Green) because the finding did not: (1) result in an actual loss of operability or functionality, (2) represent a loss of system and/or function (3) represent an actual loss of function of a single train for greater than its technical specification allowed outage time, (4) represent an actual loss of function of one or more non-technical specification trains of equipment designated as high safety-significant for greater than 24 hours, and (5) involve the loss or degradation of equipment or function specifically designed to mitigate a seismic, flooding, or severe weather event. This finding did not have a cross-cutting aspect since the switches were installed and evaluated in 2003, and therefore it is not indicative of current performance (Section 4OA3.5.2).of current performance (Section 4OA3.5.2).

Discovered date

23:59:59, 31 March 2014 +

Docket

05000313 +

Event date

23:59:59, 31 March 2014 +

Finding integer

3 +

Finding type

Non-cited violation +

Has query"Has query" is a predefined property that represents meta information (in form of a <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Subobject">subobject</a>) about individual queries and is provided by <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Special_properties">Semantic MediaWiki</a>.

Hours

2.777778e-4 d (0.00667 hours, 3.968254e-5 weeks, 9.132e-6 months) +

Identified by

NRC identified +

Inspection Manual Chapter

NRC Inspection Manual 0609 +

Inspection procedure

IP 71153, Event Followup +

Inspection report

IR 05000313/2013012 +

Inspector

Greg Werner +, L Willoughby +, B Latta +, Jim Melfi + and Nnaerika Okonkwo +

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>.

12:58:16, 25 September 2017 +

Person