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Unit 2 RPS actuation / unplanned scram occ … Unit 2 RPS actuation / unplanned scram occurred at 1506 eastern time on low reactor water level scram initiation. The unit experienced a partial loss of condensate feedwater due to the trip of 2D 4160 volt station service bus (non-safety related). The 2C 4160 volt bus remained in service supplying power to one condensate pump and one condensate booster pump. Investigation of the 2D 4kv bus trip is in progress. Also received a Group II isolation signal due to low reactor water level.</br>The reactor is currently stable with water level at 37 inches. Normal feedwater has been used to makeup water level and decay heat is being discharged to the condenser via turbine bypass valves. All rods fully inserted. No SRVs lifted during the transient. The lowest water level reached was -5 inches. The Unit remained in a normal electrical lineup. There were no significant LCOs in effect at the time of the scram. There was no impact on Unit 1. The licensee notes that I&C activities had been in progress on the 2D 4kv bus about the time that it tripped however there is currently no specific connection between these activities and the bus trip.</br>The licensee notified the NRC Resident Inspector. licensee notified the NRC Resident Inspector. +
19:06:00, 7 August 2007 +
43,552 +
16:20:00, 7 August 2007 +
19:06:00, 7 August 2007 +
Unit 2 RPS actuation / unplanned scram occ … Unit 2 RPS actuation / unplanned scram occurred at 1506 eastern time on low reactor water level scram initiation. The unit experienced a partial loss of condensate feedwater due to the trip of 2D 4160 volt station service bus (non-safety related). The 2C 4160 volt bus remained in service supplying power to one condensate pump and one condensate booster pump. Investigation of the 2D 4kv bus trip is in progress. Also received a Group II isolation signal due to low reactor water level.</br>The reactor is currently stable with water level at 37 inches. Normal feedwater has been used to makeup water level and decay heat is being discharged to the condenser via turbine bypass valves. All rods fully inserted. No SRVs lifted during the transient. The lowest water level reached was -5 inches. The Unit remained in a normal electrical lineup. There were no significant LCOs in effect at the time of the scram. There was no impact on Unit 1. The licensee notes that I&C activities had been in progress on the 2D 4kv bus about the time that it tripped however there is currently no specific connection between these activities and the bus trip.</br>The licensee notified the NRC Resident Inspector. licensee notified the NRC Resident Inspector. +
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100 +
00:00:00, 7 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>.
02:16:13, 2 March 2018 +
16:20:00, 7 August 2007 +
true +
-0.115 d (-2.77 hours, -0.0165 weeks, -0.00379 months) +
19:06:00, 7 August 2007 +
Reactor Scram on Low Reactor Water Level Following Partial Loss of Condensate Feedwater Flow +
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.