Browse wiki
Jump to navigation
Jump to search
A finding of very low safety significance … A finding of very low safety significance was self-revealed on August 24, 2010, when the Reactor Water Cleanup (RT) System return line outboard primary containment isolation valve went closed. Many other unintended valve repositioning events occurred from August 25 through August 26, 2010. The licensee failed to perform preventive maintenance on the Division 1 Self Test System (STS) safety-related 5 Volt (V) power supply. As a result, a degraded voltage condition existed in the test circuit, which was identified as the cause for the above valve repositioning events. As a corrective action, the licensee has since installed a temporary plant modification of dual 5 V power supplies for all four divisions of the STS. No violation of regulatory requirements was identified. The finding was of more than minor significance because the failure to perform preventative maintenance on critical components, if left uncorrected, would potentially lead to a more significant safety concern. This finding was of very low safety significance based on answering no to each of the Phase 1 screening questions identified in the Containment Barrier column of Table 4a in Attachment 0609.04, Phase 1 - Initial Screening and Characterization of Findings. The inspectors concluded that this finding affected the cross-cutting area of human performance. Specifically, in the area of resources, the licensee did not adequately maintain long-term plant safety by the maintenance of design margins, minimizing preventive maintenance deferrals, and ensuring maintenance and engineering backlogs are low enough to support safety.backlogs are low enough to support safety. +
23:59:59, 31 December 2010 +
23:59:59, 31 December 2010 +
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>.
05000461/FIN-2010005-02 +, 05000461/FIN-2010005-02 +, 05000461/FIN-2010005-02 +, 05000461/FIN-2010005-02 +, 05000461/FIN-2010005-02 +, 05000461/FIN-2010005-02 +, 05000461/FIN-2010005-02 +, 05000461/FIN-2010005-02 +, 05000461/FIN-2010005-02 +, 05000461/FIN-2010005-02 +, 05000461/FIN-2010005-02 +, 05000461/FIN-2010005-02 +, 05000461/FIN-2010005-02 +, 05000461/FIN-2010005-02 +, 05000461/FIN-2010005-02 +, 05000461/FIN-2010005-02 +, 05000461/FIN-2010005-02 +, 05000461/FIN-2010005-02 +, 05000461/FIN-2010005-02 +, 05000461/FIN-2010005-02 +, 05000461/FIN-2010005-02 +, 05000461/FIN-2010005-02 +, 05000461/FIN-2010005-02 + and 05000461/FIN-2010005-02 +
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>.
21:47:32, 8 October 2017 +
23:59:59, 31 December 2010 +