Browse wiki
Jump to navigation
Jump to search
On February 9, 2001, with Unit 2 operating … On February 9, 2001, with Unit 2 operating at 100% reactor power, it was determined that a support snubber on the "B" pressurizer safety valve discharge pipe was fully extended. Analyses concluded the snubber would be loaded beyond its faulted load under design dynamic loading conditions and therefore, could not be considered operable. Due to Technical Specifications requiring snubbers to be operable during reactor operation, a 72-hour limiting condition of operation was entered at 1049 hours.</br></br>Unit 2 was shut down and the snubber in question was replaced. Further investigation determined the snubber had been inoperable beyond the allowed outage time, therefore, this event is reportable pursuant to 10CFR50.73(a)(2)(i)(B) for a condition prohibited by Technical Specifications. Field verification will be conducted and necessary corrective actions implemented as unit operation and exposure levels permit. The station snubber program will be revised to include criteria for verification of snubber cold piston settings. With the snubber in the fully extended condition, calculations of stress levels in the piping indicated that piping components (other than the snubber) would maintain structural integrity in all loading conditions. Therefore, this event resulted in no safety consequences or significant implications and the health and safety of the public were not affected.nd safety of the public were not affected. +
On February 9, 2001, with Unit 2 operating … On February 9, 2001, with Unit 2 operating at 100% reactor power, it was determined that a support snubber on the "B" pressurizer safety valve discharge pipe was fully extended. Analyses concluded the snubber would be loaded beyond its faulted load under design dynamic loading conditions and therefore, could not be considered operable. Due to Technical Specifications requiring snubbers to be operable during reactor operation, a 72-hour limiting condition of operation was entered at 1049 hours.</br></br>Unit 2 was shut down and the snubber in question was replaced. Further investigation determined the snubber had been inoperable beyond the allowed outage time, therefore, this event is reportable pursuant to 10CFR50.73(a)(2)(i)(B) for a condition prohibited by Technical Specifications. Field verification will be conducted and necessary corrective actions implemented as unit operation and exposure levels permit. The station snubber program will be revised to include criteria for verification of snubber cold piston settings. With the snubber in the fully extended condition, calculations of stress levels in the piping indicated that piping components (other than the snubber) would maintain structural integrity in all loading conditions. Therefore, this event resulted in no safety consequences or significant implications and the health and safety of the public were not affected.nd safety of the public were not affected. +
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>.
1 +
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>.
15:09:32, 27 November 2017 +
URL"URL" is a <a href="/Special:Types/URL" title="Special:Types/URL">type</a> and predefined property provided by <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Special_properties">Semantic MediaWiki</a> to represent URI/URL values.