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ENS 47656
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Category
ENS Notification  and Power Reactor
CFR
10 CFR 50.72(b)(3)(v)(A), Loss of Safety Function - Shutdown the Reactor +, 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident +  and 10 CFR 50.72#b3vA +
Current power
100  +
Current reactor mode
Power Operation +
Description
A condition was discovered on February 9, … A condition was discovered on February 9, 2012 that could have prevented fulfillment of the safety function to shutdown the reactor and maintain it in a safe shutdown condition and mitigate the consequences of an accident.</br>During maintenance performed on the main steam line pressure transmitters on both trains, the one-time use only EEQ seals were not replaced rendering the transmitters inoperable. These transmitters initiate safety injection and main steam isolation functions in the event of a main steam line break. Since all transmitters were inoperable this condition is being reported pursuant to 10 CFR 50.72(b)(3)(v)(A) and (D).</br>The condition existed for about a week.</br>Subsequently the required number of transmitters have been repaired and are operable.</br>The NRC Senior Resident Inspector was notified and was present in the control room during the repair activity.</br>The licensee also notified the State of Connecticut.ee also notified the State of Connecticut.  +
Discovered date
22:55:00, 9 February 2012  +
ENS id number
47,656  +
Emergency class
Non Emergency +
Entered date
22:21:00, 9 February 2012  +
Event date
22:55:00, 9 February 2012  +
Event description
A condition was discovered on February 9, … A condition was discovered on February 9, 2012 that could have prevented fulfillment of the safety function to shutdown the reactor and maintain it in a safe shutdown condition and mitigate the consequences of an accident.</br>During maintenance performed on the main steam line pressure transmitters on both trains, the one-time use only EEQ seals were not replaced rendering the transmitters inoperable. These transmitters initiate safety injection and main steam isolation functions in the event of a main steam line break. Since all transmitters were inoperable this condition is being reported pursuant to 10 CFR 50.72(b)(3)(v)(A) and (D).</br>The condition existed for about a week.</br>Subsequently the required number of transmitters have been repaired and are operable.</br>The NRC Senior Resident Inspector was notified and was present in the control room during the repair activity.</br>The licensee also notified the State of Connecticut.ee also notified the State of Connecticut.  +
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 47656 +, ENS 47656 +, ENS 47656 +, ENS 47656 +, ENS 47656 +, ENS 47656 +, ENS 47656 +, ENS 47656 +, ENS 47656 +, ENS 47656 +, ENS 47656 +, ENS 47656 +, ENS 47656 +, ENS 47656 +  and ENS 47656 +
Initial power
100  +
Initial reactor mode
Power Operation +
Last update date
00:00:00, 9 February 2012  +
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>.
22:25:58, 24 September 2017  +
NRC officer
Pete Snyder +
Notification date
22:21:00, 9 February 2012  +
Originated by
Barrett Nichols +
Reactor critical
true  +
Reactor scram
false  +
Reactor type
Westinghouse PWR 4-Loop +
Region
NRC Region 1 +
Reporting criterion
10 CFR 50.72(b)(3)(v)(A), Loss of Safety Function - Shutdown the Reactor +  and 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident +
Reporting time
-0.0238 d (-0.57 hours, -0.00339 weeks, -7.80786e-4 months)  +
Site
Millstone +
Start date
22:55:00, 9 February 2012  +
State
Connecticut +
System
Main Steam Line +  and Main Steam +
Title
Main Steam Line Pressure Transmitters Found Inoperable  +
Topic
Safe Shutdown +
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/2012/20120210en.html#en47656  +
Unit
3  +
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