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ENS 53550
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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 23:58 (Central Daylight Time) Unit 2 Re … At 23:58 (Central Daylight Time) Unit 2 Reactor Tripped (automatic reactor trip) due to a Turbine Trip/ Generator Lock Out. All Auxiliary Feedwater Pumps started due to steam generator Lo Lo levels. </br>Unit 2 is being maintained in Hot Standby (Mode 3) in accordance with Integrated Plant Operating Procedure IP0-007B. The Emergency Response Guideline Procedure Network has been exited. Decay heat is being rejected to the Main Condenser via Steam Dump Valves. </br>The cause of the Generator Lockout is currently under investigation.</br>All control rods fully inserted in response to the automatic reactor trip.</br>The licensee notified the NRC resident.p. The licensee notified the NRC resident.  +
Discovered date
05:00:00, 13 August 2018  +
Emergency class
Non Emergency +
Entered date
02:18:00, 14 August 2018  +
Equipment trip
Reactor Trip +
Event date
05:00:00, 13 August 2018  +
Event description
At 23:58 (Central Daylight Time) Unit 2 Re … At 23:58 (Central Daylight Time) Unit 2 Reactor Tripped (automatic reactor trip) due to a Turbine Trip/ Generator Lock Out. All Auxiliary Feedwater Pumps started due to steam generator Lo Lo levels. </br>Unit 2 is being maintained in Hot Standby (Mode 3) in accordance with Integrated Plant Operating Procedure IP0-007B. The Emergency Response Guideline Procedure Network has been exited. Decay heat is being rejected to the Main Condenser via Steam Dump Valves. </br>The cause of the Generator Lockout is currently under investigation.</br>All control rods fully inserted in response to the automatic reactor trip.</br>The licensee notified the NRC resident.p. The licensee notified the NRC resident.  +
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 53550 +, ENS 53550 +, ENS 53550 +, ENS 53550 +, ENS 53550 +, ENS 53550 +, ENS 53550 +, ENS 53550 +, ENS 53550 +, ENS 53550 +, ENS 53550 +, ENS 53550 +, ENS 53550 +, ENS 53550 +  and ENS 53550 +
Initial power
100  +
Initial reactor mode
Power Operation +
Last update date
00:00:00, 14 August 2018  +
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>.
01:40:45, 31 October 2018  +
NRC officer
Thomas Kendzia +
Notification date
02:18:00, 14 August 2018  +
Originated by
Brian Mitchell +
Reactor critical
true  +
Region
NRC Region 4 +
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
0.888 d (21.3 hours, 0.127 weeks, 0.0292 months)  +
Scram
Automatic Scram +
Site
Comanche Peak +
Start date
05:00:00, 13 August 2018  +
State
Texas +
System
Steam Generator +, Auxiliary Feedwater +, Main Condenser +  and Control Rod +
Title
Automatic Reactor Trip Due to Generator Lockout  +
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.
https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2018/20180815en.html#en53550  +
Unit
2  +
 
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