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ENS 50601
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 +  and 10 CFR 50.72(b)(2)(iv)(A), System Actuation - ECCS Discharge +
Current power
0  +
Current reactor mode
Hot Shutdown +
Description
The Perry Nuclear Power Plant experienced … The Perry Nuclear Power Plant experienced an automatic reactor scram due to a loss of feedwater, which resulted in receiving valid reactor vessel water Level 3 and Level 2 initiation signals. The High Pressure Core Spray system and the Reactor Core Isolation Cooling system started and injected. Reactor water level and pressure have been stabilized in the required bands. The motor feed pump automatically started and is being used to control reactor vessel water level. The High Pressure Core Spray and Reactor Core Isolation Cooling systems have been returned to the standby mode. As a result of receiving a reactor vessel water Level 2 signal a Balance of Plant containment isolation signal was received. All systems isolated as required and the plant is restoring isolated systems in accordance with plant procedures.</br>During the scram, all rods fully inserted into the core. Decay heat is being removed via turbine bypass valves to the main condenser. The electrical grid is stable and is supplying plant loads. An emergency diesel generator (Division 3 High Pressure Core Spray) started, as designed, as a result of the reactor vessel water Level 2 signal. No safety relief valves lifted as a result of the transient. </br>The plant is stable with cooldown and depressurization to Mode 4 in progress. The cause of the loss of feedwater is under investigation.</br>The NRC Resident Inspector has been notified. The State of Ohio and local officials will be notified.Ohio and local officials will be notified.  +
Discovered date
13:47:00, 7 November 2014  +
ENS id number
50,601  +
Emergency class
Non Emergency +
Entered date
11:13:00, 7 November 2014  +
Event date
13:47:00, 7 November 2014  +
Event description
The Perry Nuclear Power Plant experienced … The Perry Nuclear Power Plant experienced an automatic reactor scram due to a loss of feedwater, which resulted in receiving valid reactor vessel water Level 3 and Level 2 initiation signals. The High Pressure Core Spray system and the Reactor Core Isolation Cooling system started and injected. Reactor water level and pressure have been stabilized in the required bands. The motor feed pump automatically started and is being used to control reactor vessel water level. The High Pressure Core Spray and Reactor Core Isolation Cooling systems have been returned to the standby mode. As a result of receiving a reactor vessel water Level 2 signal a Balance of Plant containment isolation signal was received. All systems isolated as required and the plant is restoring isolated systems in accordance with plant procedures.</br>During the scram, all rods fully inserted into the core. Decay heat is being removed via turbine bypass valves to the main condenser. The electrical grid is stable and is supplying plant loads. An emergency diesel generator (Division 3 High Pressure Core Spray) started, as designed, as a result of the reactor vessel water Level 2 signal. No safety relief valves lifted as a result of the transient. </br>The plant is stable with cooldown and depressurization to Mode 4 in progress. The cause of the loss of feedwater is under investigation.</br>The NRC Resident Inspector has been notified. The State of Ohio and local officials will be notified.Ohio and local officials will be 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 50601 +, ENS 50601 +, ENS 50601 +, ENS 50601 +, ENS 50601 +, ENS 50601 +, ENS 50601 +, ENS 50601 +, ENS 50601 +, ENS 50601 +, ENS 50601 +, ENS 50601 +, ENS 50601 +, ENS 50601 +, ENS 50601 +  and ENS 50601 +
Initial power
100  +
Initial reactor mode
Power Operation +
Last update date
00:00:00, 7 November 2014  +
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>.
01:49:15, 2 March 2018  +
NRC officer
Jeff Rotton +
Notification date
11:13:00, 7 November 2014  +
Originated by
Curtis Bray +
Reactor critical
true  +
Reactor type
GE-6 +
Region
NRC Region 3 +
Reporting criterion
10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation +, 10 CFR 50.72(b)(3)(iv)(A), System Actuation +  and 10 CFR 50.72(b)(2)(iv)(A), System Actuation - ECCS Discharge +
Reporting time
-0.107 d (-2.57 hours, -0.0153 weeks, -0.00352 months)  +
Scram
Automatic Scram +
Site
Perry +
Start date
13:47:00, 7 November 2014  +
State
Ohio +
System
Feedwater +, Emergency Diesel Generator +, Reactor Core Isolation Cooling +, High Pressure Core Spray +, Safety Relief Valve +  and Main Condenser +
Title
Automatic Reactor Scram Due to Loss of Feedwater  +
Topic
Reactor Vessel Water Level +
Turbine component
Turbine bypass valve +
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/2014/20141110en.html#en50601  +
Unit
1  +
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