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During routine surveillance testing on Uni … During routine surveillance testing on Unit 1 'B' Train Solid State Protection System, per FNP-1-STP-33.2B, the 'B' Train Rx Trip Breaker Failed to trip when a trip signal was sent from one of the manual function test push buttons. Indicated voltage did go to zero, but the Reactor Trip Breaker did not open. Per the testing sequence, the shunt trip for this breaker was being blocked at this time. A timeout was taken to determine the best course of action. Following discussions with Shift Manager, Duty manager, Emergency Director, and Electrical Maintenance supervision, it was decided to determine if the breaker would trip via the shunt trip mechanism. The surveillance testing was continued, and the 'B' Reactor Trip Breaker opened when the test signal was again inserted with the shunt trip unblocked. The 'B' Reactor Trip Breaker was replaced with a new breaker, and was subsequently tested sat per applicable sections of the surveillance test procedure.</br>***This event did not result an any offsite radiation release, and did not pose a threat to the general public.***</br>The licensee informed the NRC Resident Inspector.ensee informed the NRC Resident Inspector. +
14:47:00, 24 August 2007 +
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15:25:00, 24 August 2007 +
14:47:00, 24 August 2007 +
During routine surveillance testing on Uni … During routine surveillance testing on Unit 1 'B' Train Solid State Protection System, per FNP-1-STP-33.2B, the 'B' Train Rx Trip Breaker Failed to trip when a trip signal was sent from one of the manual function test push buttons. Indicated voltage did go to zero, but the Reactor Trip Breaker did not open. Per the testing sequence, the shunt trip for this breaker was being blocked at this time. A timeout was taken to determine the best course of action. Following discussions with Shift Manager, Duty manager, Emergency Director, and Electrical Maintenance supervision, it was decided to determine if the breaker would trip via the shunt trip mechanism. The surveillance testing was continued, and the 'B' Reactor Trip Breaker opened when the test signal was again inserted with the shunt trip unblocked. The 'B' Reactor Trip Breaker was replaced with a new breaker, and was subsequently tested sat per applicable sections of the surveillance test procedure.</br>***This event did not result an any offsite radiation release, and did not pose a threat to the general public.***</br>The licensee informed the NRC Resident Inspector.ensee informed the NRC Resident Inspector. +
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>.
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00:00:00, 24 August 2007 +
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>.
22:36:14, 24 September 2017 +
15:25:00, 24 August 2007 +
true +
false +
0.0263 d (0.63 hours, 0.00375 weeks, 8.62974e-4 months) +
14:47:00, 24 August 2007 +
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.