Browse wiki
Jump to navigation
Jump to search
Two t incorrectly t configured t relays t … Two t incorrectly t configured t relays t were t installed t during t the t 1999 t refueling outage t (RFO 12) t in the B6 480 VAC bus transfer scheme as part of the Pilgrim Station seismic upgrade program. t These relays would have prevented swing bus B6 from transferring to the alternate supply under certain design basis conditions.</br></br>The inability of B6 to transfer would have prevented the low pressure coolant injection isolation valves from opening to perform their safety function.</br></br>The cause for installation of the nonconforming relays was failure to detect the mismatch between the relay label and contact configuration by the manufacturer and by a commercial t dedication organization during the qualification process.</br></br>Corrective actions restored the design basis requirements t for the B6 t transfer scheme.</br></br>This t report meets t the t reporting requirements t of t 10 t CFR 21 t for nonconforming materials installed in safety-related applications.</br></br>This event occurred at 100 percent reactor power with the reactor mode selector switch in the RUN position. t The reactor vessel pressure was about t 1035 psig with t the t water t temperature t at t the t saturation t temperature t for t that t pressure.</br></br>This event posed no threat to public health and safety.sed no threat to public health and safety. +
Two t incorrectly t configured t relays t … Two t incorrectly t configured t relays t were t installed t during t the t 1999 t refueling outage t (RFO 12) t in the B6 480 VAC bus transfer scheme as part of the Pilgrim Station seismic upgrade program. t These relays would have prevented swing bus B6 from transferring to the alternate supply under certain design basis conditions.</br></br>The inability of B6 to transfer would have prevented the low pressure coolant injection isolation valves from opening to perform their safety function.</br></br>The cause for installation of the nonconforming relays was failure to detect the mismatch between the relay label and contact configuration by the manufacturer and by a commercial t dedication organization during the qualification process.</br></br>Corrective actions restored the design basis requirements t for the B6 t transfer scheme.</br></br>This t report meets t the t reporting requirements t of t 10 t CFR 21 t for nonconforming materials installed in safety-related applications.</br></br>This event occurred at 100 percent reactor power with the reactor mode selector switch in the RUN position. t The reactor vessel pressure was about t 1035 psig with t the t water t temperature t at t the t saturation t temperature t for t that t pressure.</br></br>This event posed no threat to public health and safety.sed no threat to public health and safety. +
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>.
05:36:02, 1 December 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.