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ENS 51956
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Category
ENS Notification  and Power Reactor
CFR
10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation +  and 10 CFR 50.72(b)(3)(iv)(A), System Actuation +
Current power
0  +
Current reactor mode
Hot Standby +
Description
At 0206 EDT 5/25/16, Vogtle Unit 2 tripped … At 0206 EDT 5/25/16, Vogtle Unit 2 tripped from 100% when SG (Steam Generator) #1 Level began to lower for an unknown reason. Cause for level issue is under investigation. All control rods fully inserted and AFW (Auxiliary Feedwater) and FWI (Feedwater Isolation) actuated as expected. </br>Unit 2 is in Mode 3 and stable with decay heat being removed by Aux Feedwater.</br>Prior to the trip, I & C (Instrumentation & Calibration) was performing a loop #1 narrow range instrument calibration. Unit 2 is in a normal post trip electrical lineup with all source of offsite power available.</br>The licensee informed the NRC Resident Inspector. The licensee informed the NRC Resident Inspector.  +
Discovered date
06:06:00, 25 May 2016  +
ENS id number
51,956  +
Emergency class
Non Emergency +
Entered date
04:54:00, 25 May 2016  +
Event date
06:06:00, 25 May 2016  +
Event description
At 0206 EDT 5/25/16, Vogtle Unit 2 tripped … At 0206 EDT 5/25/16, Vogtle Unit 2 tripped from 100% when SG (Steam Generator) #1 Level began to lower for an unknown reason. Cause for level issue is under investigation. All control rods fully inserted and AFW (Auxiliary Feedwater) and FWI (Feedwater Isolation) actuated as expected. </br>Unit 2 is in Mode 3 and stable with decay heat being removed by Aux Feedwater.</br>Prior to the trip, I & C (Instrumentation & Calibration) was performing a loop #1 narrow range instrument calibration. Unit 2 is in a normal post trip electrical lineup with all source of offsite power available.</br>The licensee informed the NRC Resident Inspector. The licensee 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>.
ENS 51956 +, ENS 51956 +, ENS 51956 +, ENS 51956 +, ENS 51956 +, ENS 51956 +, ENS 51956 +, ENS 51956 +, ENS 51956 +, ENS 51956 +, ENS 51956 +, ENS 51956 +, ENS 51956 +, ENS 51956 +  and ENS 51956 +
Initial power
100  +
Initial reactor mode
Power Operation +
Last update date
00:00:00, 25 May 2016  +
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>.
01:45:03, 2 March 2018  +
NRC officer
Steve Sandin +
Notification date
04:54:00, 25 May 2016  +
Originated by
Matt Freck +
Reactor critical
true  +
Reactor type
Westinghouse PWR 4-Loop +
Region
NRC Region 2 +
Reporting criterion
10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation +  and 10 CFR 50.72(b)(3)(iv)(A), System Actuation +
Reporting time
-0.05 d (-1.2 hours, -0.00714 weeks, -0.00164 months)  +
Scram
Automatic Scram +
Site
Vogtle +
Start date
06:06:00, 25 May 2016  +
State
Georgia +
System
Steam Generator +, Feedwater +  and Control Rod +
Title
Automatic Reactor Trip on Lowering Steam Generator Water Level  +
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.
http://www.nrc.gov/reading-rm/doc-collections/event-status/event/2016/20160526en.html#en51956  +
Unit
2  +
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