Browse wiki
Jump to navigation
Jump to search
A finding of very low safety significance … A finding of very low safety significance was identified at the Braidwood and Byron Stations by the inspectors when licensee personnel failed to adequately document and justify continued operability of the auxiliary feedwater (AF) system. Specifically, licensee evaluations of known voids in the AF alternate source suction piping did not provide an adequate technical basis to support operability of the AF pumps during a suction swap-over scenario. Subsequently, the licensee filled the voids and a Root Cause Evaluation (RCE) was initiated under Issue Report (IR) 1194196 (Braidwood) and IR 1194324 (Byron). The RCE was initiated to determine why prior opportunities for discovery of the inadequate void acceptance basis were missed and to develop associated corrective actions. The inspectors determined the finding was more than minor because, if left uncorrected, the failure to recognize conditions that could render equipment inoperable had the potential to lead to a more significant safety concern. Because the finding was not a design deficiency, did not result in a loss of safety function, and did not screen as potentially risk-significant due to a seismic, flooding, or severe weather initiating event, the inspectors concluded that the finding was of very low safety significance (Green). This finding was associated with a cross-cutting aspect in the Decision-Making component of the Human Performance cross-cutting area because the licensee did not use conservative assumptions and did not verify the validity of underlying assumptions in their evaluations of the AF suction piping voids.valuations of the AF suction piping voids. +
23:59:59, 30 June 2011 +
23:59:59, 30 June 2011 +
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>.
05000456/FIN-2011012-02 +, 05000456/FIN-2011012-02 +, 05000456/FIN-2011012-02 +, 05000456/FIN-2011012-02 +, 05000456/FIN-2011012-02 +, 05000456/FIN-2011012-02 +, 05000456/FIN-2011012-02 +, 05000456/FIN-2011012-02 +, 05000456/FIN-2011012-02 +, 05000456/FIN-2011012-02 +, 05000456/FIN-2011012-02 +, 05000456/FIN-2011012-02 +, 05000456/FIN-2011012-02 +, 05000456/FIN-2011012-02 +, 05000456/FIN-2011012-02 +, 05000456/FIN-2011012-02 +, 05000456/FIN-2011012-02 +, 05000456/FIN-2011012-02 +, 05000456/FIN-2011012-02 +, 05000456/FIN-2011012-02 +, 05000456/FIN-2011012-02 +, 05000456/FIN-2011012-02 +, 05000456/FIN-2011012-02 +, 05000456/FIN-2011012-02 +, 05000456/FIN-2011012-02 +, 05000456/FIN-2011012-02 +, 05000456/FIN-2011012-02 +, 05000456/FIN-2011012-02 +, 05000456/FIN-2011012-02 +, 05000456/FIN-2011012-02 +...
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>.
12:57:31, 25 September 2017 +
23:59:59, 30 June 2011 +