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ENS 44906
Show incoming properties 
Category
ENS Notification  and Power Reactor
Atomic Element
Lead +
CFR
10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release +, 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 2151 CDT on 3/13/2009 with plant power … At 2151 CDT on 3/13/2009 with plant power at 84% following securing of the 2P-1A Main Feedwater Pump at 1934 due to bearing degradation, Unit 2 experienced a failure of the 'B' Main Feedwater Regulating Valve 2CV-0740 which caused 2E-24B Steam Generator level to lower. At 2151, with 2E-24B Steam Generator level at approximately 25% control room staff manually tripped the reactor anticipating an automatic trip at 22% steam generator level. Emergency Feedwater Actuation System automatically actuated at 22% steam generator level and responded to restore level to the normal post-trip levels. All Control Element Assemblies (rods) Inserted on the reactor trip.</br>No safeties or relief valves opened after the trip. The plant is in its normal shutdown electrical line-up. Steam generator level is being maintained with emergency feedwater and decay heat is being dumped to the main condenser.</br>The licensee notified the State of Arkansas and the NRC Resident Inspector.f Arkansas and the NRC Resident Inspector.  +
Discovered date
02:51:00, 14 March 2009  +
Emergency class
Non Emergency +
Entered date
02:03:00, 14 March 2009  +
Equipment trip
Reactor Trip +
Event date
02:51:00, 14 March 2009  +
Event description
At 2151 CDT on 3/13/2009 with plant power … At 2151 CDT on 3/13/2009 with plant power at 84% following securing of the 2P-1A Main Feedwater Pump at 1934 due to bearing degradation, Unit 2 experienced a failure of the 'B' Main Feedwater Regulating Valve 2CV-0740 which caused 2E-24B Steam Generator level to lower. At 2151, with 2E-24B Steam Generator level at approximately 25% control room staff manually tripped the reactor anticipating an automatic trip at 22% steam generator level. Emergency Feedwater Actuation System automatically actuated at 22% steam generator level and responded to restore level to the normal post-trip levels. All Control Element Assemblies (rods) Inserted on the reactor trip.</br>No safeties or relief valves opened after the trip. The plant is in its normal shutdown electrical line-up. Steam generator level is being maintained with emergency feedwater and decay heat is being dumped to the main condenser.</br>The licensee notified the State of Arkansas and the NRC Resident Inspector.f Arkansas and 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 44906 +, ENS 44906 +, ENS 44906 +, ENS 44906 +, ENS 44906 +, ENS 44906 +, ENS 44906 +, ENS 44906 +, ENS 44906 +, ENS 44906 +, ENS 44906 +, ENS 44906 +, ENS 44906 +, ENS 44906 +, ENS 44906 +  and ENS 44906 +
Initial power
84  +
Initial reactor mode
Power Operation +
Last update date
00:00:00, 14 March 2009  +
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>.
02:12:32, 2 March 2018  +
NRC officer
Mark Abramovitz +
Notification date
02:03:00, 14 March 2009  +
Originated by
Rex Knight +
Reactor critical
true  +
Reactor scram
true  +
Reactor type
CE +
Region
NRC Region 4 +
Reporting criterion
10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release +, 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation +  and 10 CFR 50.72(b)(3)(iv)(A), System Actuation +
Reporting time
-0.0333 d (-0.8 hours, -0.00476 weeks, -0.0011 months)  +
SSC
2P-1A +, 2CV-0740 +  and 2E-24B +
Scram
Manual Scram +  and Automatic Scram +
Site
Arkansas Nuclear +
Start date
02:51:00, 14 March 2009  +
State
Arkansas +
System
Steam Generator +, Feedwater +, Main Condenser +  and Emergency Feedwater Actuation System +
Title
Feedwater Regulating Valve Failure Leads to Manual 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.
http://www.nrc.gov/reading-rm/doc-collections/event-status/event/2009/20090316en.html#en44906  +
Unit
2  +
 
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