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ENS 56544
Show incoming properties
Category
ENS Notification  and Power Reactor
CFR
10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation +, 10 CFR 50.72(b)(3)(iv)(A), System Actuation +, 10 CFR 50.72#b2ivB +, 10 CFR 50.72#b3ivA +  and 10 CFR 50.72#b3ivB +
Current power
0  +
Current reactor mode
Hot Standby +
Description
The following information was provided by … The following information was provided by the licensee via email:</br>At 0446 EDT on 5/30/2023, with Millstone Power Station Unit 3 operating at approximately 100 percent reactor power, an automatic reactor trip occurred due to a turbine trip caused by electrical protection. The reactor trip was uncomplicated and decay heat is being removed via steam dumps to the condenser. All systems responded as expected to the trip. </br>Auxiliary feedwater actuated automatically as expected following the trip due to low-low levels in the steam generators. </br>There was no risk to the public. There was no impact to Millstone Unit 2. </br>This event is being reported as a four hour report under 10CFR50.72(b)(2)(iv)(B) as a condition that resulted in actuation of the reactor protection system while the reactor was critical, and as an eight hour report under 10CFR50.72(b)(3)(iv)(A) and 10CFR50.72(b)(3)(iv)(B) for actuation of the auxiliary feedwater system.</br>The NRC Resident Inspector has been notified. NRC Resident Inspector has been notified.  +
Discovered date
08:46:00, 30 May 2023  +
ENS id number
56,544  +
Emergency class
Non Emergency +
Entered date
08:34:00, 30 May 2023  +
Equipment trip
Turbine Trip +  and Reactor Trip +
Event date
08:46:00, 30 May 2023  +
Event description
The following information was provided by … The following information was provided by the licensee via email:</br>At 0446 EDT on 5/30/2023, with Millstone Power Station Unit 3 operating at approximately 100 percent reactor power, an automatic reactor trip occurred due to a turbine trip caused by electrical protection. The reactor trip was uncomplicated and decay heat is being removed via steam dumps to the condenser. All systems responded as expected to the trip. </br>Auxiliary feedwater actuated automatically as expected following the trip due to low-low levels in the steam generators. </br>There was no risk to the public. There was no impact to Millstone Unit 2. </br>This event is being reported as a four hour report under 10CFR50.72(b)(2)(iv)(B) as a condition that resulted in actuation of the reactor protection system while the reactor was critical, and as an eight hour report under 10CFR50.72(b)(3)(iv)(A) and 10CFR50.72(b)(3)(iv)(B) for actuation of the auxiliary feedwater system.</br>The NRC Resident Inspector has been notified. NRC Resident Inspector has been notified.  +
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 56544 +, ENS 56544 +, ENS 56544 +, ENS 56544 +, ENS 56544 +, ENS 56544 +, ENS 56544 +, ENS 56544 +, ENS 56544 +, ENS 56544 +, ENS 56544 +, ENS 56544 +, ENS 56544 +, ENS 56544 +  and ENS 56544 +
Initial power
100  +
Initial reactor mode
Power Operation +
Last update date
00:00:00, 31 May 2023  +
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>.
19:58:15, 4 January 2024  +
NRC officer
Bill Gott +
Notification date
08:34:00, 30 May 2023  +
Originated by
Jon Daskam +
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
-0.00833 d (-0.2 hours, -0.00119 weeks, -2.7396e-4 months)  +
Scram
Automatic Scram +
Site
Millstone +
Start date
08:46:00, 30 May 2023  +
State
Connecticut +
System
Steam Generator +, Reactor Protection System +  and Auxiliary Feedwater +
Title
Reactor Trip  +
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/2023/20230601en.html#en56544  +
Unit
3  +
Retrieved from "https://kanterella.com/Special:Browse/:ENS-2056544"