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ENS 52033
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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
At 0841 (CDT) an automatic turbine trip oc … At 0841 (CDT) an automatic turbine trip occurred, resulting in an automatic reactor protective system (RPS) actuation due to loss of turbine load. The source of the turbine trip was from the distributed control system (DCS) and is being investigated via a root cause analysis. This was an uncomplicated trip, all systems responded as expected post trip, and the reactor trip recovery procedure was entered at 0852 (CDT).</br>The plant is stable in Mode 3 with a normal electrical line up and decay heat removal via steam dumps to the condenser.</br>The NRC Resident Inspector has been notified. NRC Resident Inspector has been notified.  +
Discovered date
13:41:00, 22 June 2016  +
ENS id number
52,033  +
Emergency class
Non Emergency +
Entered date
13:02:00, 22 June 2016  +
Equipment trip
Turbine Trip +  and Reactor Trip +
Event date
13:41:00, 22 June 2016  +
Event description
At 0841 (CDT) an automatic turbine trip oc … At 0841 (CDT) an automatic turbine trip occurred, resulting in an automatic reactor protective system (RPS) actuation due to loss of turbine load. The source of the turbine trip was from the distributed control system (DCS) and is being investigated via a root cause analysis. This was an uncomplicated trip, all systems responded as expected post trip, and the reactor trip recovery procedure was entered at 0852 (CDT).</br>The plant is stable in Mode 3 with a normal electrical line up and decay heat removal via steam dumps to the condenser.</br>The NRC Resident Inspector has been notified. NRC Resident Inspector has been notified.  +
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ENS 52033 +, ENS 52033 +, ENS 52033 +, ENS 52033 +, ENS 52033 +, ENS 52033 +, ENS 52033 +, ENS 52033 +, ENS 52033 +, ENS 52033 +, ENS 52033 +, ENS 52033 +, ENS 52033 +, ENS 52033 +  and ENS 52033 +
Initial power
100  +
Initial reactor mode
Power Operation +
Last update date
00:00:00, 22 June 2016  +
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>.
01:44:51, 2 March 2018  +
NRC officer
Daniel Mills +
Notification date
13:02:00, 22 June 2016  +
Originated by
Tim Bussey +
Reactor critical
true  +
Region
NRC Region 4 +
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
-0.0271 d (-0.65 hours, -0.00387 weeks, -8.9037e-4 months)  +
Scram
Automatic Scram +
Site
Fort Calhoun +
Start date
13:41:00, 22 June 2016  +
State
Nebraska +
System
Decay Heat Removal +
Title
Automatic Reactor Trip Due to Turbine 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/2016/20160623en.html#en52033  +
Unit
1  +
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