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ENS 40309
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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
Reactor Protection System actuation in res … Reactor Protection System actuation in response to an indicated (not an actual) 2A RCP (Reactor Coolant Pump) breaker open position signal. All reactor protection and support systems operated as expected. The Aux Feedwater System started as required in response to the tripping of both Steam Generator Feed Pumps. All 3 RCPs are running; none have tripped.</br>Not understood is the indication of the 2A RCP breaker open when the breaker has remained closed.</br>The licensee reported that all control rods fully inserted; decay heat is being rejected to the condenser via the steam dumps; a steam generator atmospheric relief may have momentarily lifted during the transient; and that the electrical grid is stable. The licensee will be notifying the NRC Resident Inspector.l be notifying the NRC Resident Inspector.  +
Discovered date
16:36:00, 10 November 2003  +
ENS id number
40,309  +
Emergency class
Non Emergency +
Entered date
12:41:00, 10 November 2003  +
Event date
16:36:00, 10 November 2003  +
Event description
Reactor Protection System actuation in res … Reactor Protection System actuation in response to an indicated (not an actual) 2A RCP (Reactor Coolant Pump) breaker open position signal. All reactor protection and support systems operated as expected. The Aux Feedwater System started as required in response to the tripping of both Steam Generator Feed Pumps. All 3 RCPs are running; none have tripped.</br>Not understood is the indication of the 2A RCP breaker open when the breaker has remained closed.</br>The licensee reported that all control rods fully inserted; decay heat is being rejected to the condenser via the steam dumps; a steam generator atmospheric relief may have momentarily lifted during the transient; and that the electrical grid is stable. The licensee will be notifying the NRC Resident Inspector.l be notifying 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 40309 +, ENS 40309 +, ENS 40309 +, ENS 40309 +, ENS 40309 +, ENS 40309 +, ENS 40309 +, ENS 40309 +, ENS 40309 +, ENS 40309 +, ENS 40309 +, ENS 40309 +, ENS 40309 +, ENS 40309 +  and ENS 40309 +
Initial power
100  +
Initial reactor mode
Power Operation +
Last update date
00:00:00, 10 November 2003  +
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>.
02:24:49, 2 March 2018  +
NRC officer
Mike Ripley +
Notification date
12:41:00, 10 November 2003  +
Originated by
Forest Lero +
Reactor critical
true  +
Reactor type
Westinghouse PWR 3-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
-0.163 d (-3.92 hours, -0.0233 weeks, -0.00537 months)  +
Scram
Automatic Scram +
Site
Farley +
Start date
16:36:00, 10 November 2003  +
State
Alabama +
System
Steam Generator +, Feedwater +, Reactor Protection System +  and Control Rod +
Title
Automatic Reactor Trip Due to False Rcp Breaker Open Signal  +
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/2003/20031112en.html#en40309  +
Unit
2  +
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