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ENS 44564
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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 2236 on 10/11/08 while reducing power f … At 2236 on 10/11/08 while reducing power for a planned refueling outage, "C" Steam Generator water level decreased and the turbine tripped. The reactor tripped on the turbine trip. Auxiliary feedwater initiated as expected and decay heat is being removed via the condenser steam dumps. All control rods fully inserted.</br>No significant safety equipment is out of service and all safety buses are being supplied by offsite power. Emergency Diesel generators are available if needed. No PORVs or primary/secondary relief valves lifted. </br>The licensee is evaluating cause of steam generator level excursion. Unit 2 is unaffected. </br> The licensee notified the NRC Resident Inspector.ensee notified the NRC Resident Inspector.  +
Discovered date
02:36:00, 12 October 2008  +
ENS id number
44,564  +
Emergency class
Non Emergency +
Entered date
23:35:00, 11 October 2008  +
Equipment trip
Turbine Trip +
Event date
02:36:00, 12 October 2008  +
Event description
At 2236 on 10/11/08 while reducing power f … At 2236 on 10/11/08 while reducing power for a planned refueling outage, "C" Steam Generator water level decreased and the turbine tripped. The reactor tripped on the turbine trip. Auxiliary feedwater initiated as expected and decay heat is being removed via the condenser steam dumps. All control rods fully inserted.</br>No significant safety equipment is out of service and all safety buses are being supplied by offsite power. Emergency Diesel generators are available if needed. No PORVs or primary/secondary relief valves lifted. </br>The licensee is evaluating cause of steam generator level excursion. Unit 2 is unaffected. </br> The licensee notified the NRC Resident Inspector.ensee notified the NRC Resident Inspector.  +
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ENS 44564 +, ENS 44564 +, ENS 44564 +, ENS 44564 +, ENS 44564 +, ENS 44564 +, ENS 44564 +, ENS 44564 +, ENS 44564 +, ENS 44564 +, ENS 44564 +, ENS 44564 +, ENS 44564 +, ENS 44564 +  and ENS 44564 +
Initial power
33  +
Initial reactor mode
Power Operation +
Last update date
00:00:00, 12 October 2008  +
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>.
02:13:29, 2 March 2018  +
NRC officer
Pete Snyder +
Notification date
23:35:00, 11 October 2008  +
Originated by
Ken Hajnal +
Reactor critical
true  +
Reactor type
Westinghouse PWR 4-Loop +
Region
NRC Region 1 +
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
-0.126 d (-3.02 hours, -0.018 weeks, -0.00414 months)  +
Scram
Automatic Scram +
Site
Millstone +
Start date
02:36:00, 12 October 2008  +
State
Connecticut +
System
Steam Generator +, Emergency Diesel Generator +, Auxiliary Feedwater +  and Control Rod +
Title
Turbine Trip/ Automatic Reactor Trip on Low Steam Generator 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/2008/20081014en.html#en44564  +
Unit
3  +
 
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