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ENS 54185
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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)(2)(iv)(A), System Actuation - ECCS Discharge +
Current power
0  +
Current reactor mode
Hot Shutdown +
Description
At 1929 EDT on 7/27/2019, with the Unit in … At 1929 EDT on 7/27/2019, with the Unit in Mode 1 at 98 percent power, the reactor automatically scrammed due to a Main Turbine Trip. The trip was not complex, with all systems responding normally post-trip. Main Steam Isolation Valves (MSIVs) were manually closed to prevent exceeding Reactor Pressure Vessel Cooldown Rate. Rector Core Isolation Cooling (RCIC) was manually initiated to stabilize Reactor Vessel Water Level and Pressure following MSIV closure. The Main Condenser and Feedwater are available.</br>Operations responded and stabilized the plant. Reactor water level is being maintained via RCIC. Decay heat is being removed by discharging steam to the Main Condenser and RCIC.</br>The cause of the Main Turbine Trip is currently under investigation.</br>The site is in a normal electrical lineup. </br>The licensee notified the NRC Resident Inspector.ensee notified the NRC Resident Inspector.  +
Discovered date
23:29:00, 27 July 2019  +
ENS id number
54,185  +
Emergency class
Non Emergency +
Entered date
22:31:00, 27 July 2019  +
Equipment trip
Turbine Trip +
Event date
23:29:00, 27 July 2019  +
Event description
At 1929 EDT on 7/27/2019, with the Unit in … At 1929 EDT on 7/27/2019, with the Unit in Mode 1 at 98 percent power, the reactor automatically scrammed due to a Main Turbine Trip. The trip was not complex, with all systems responding normally post-trip. Main Steam Isolation Valves (MSIVs) were manually closed to prevent exceeding Reactor Pressure Vessel Cooldown Rate. Rector Core Isolation Cooling (RCIC) was manually initiated to stabilize Reactor Vessel Water Level and Pressure following MSIV closure. The Main Condenser and Feedwater are available.</br>Operations responded and stabilized the plant. Reactor water level is being maintained via RCIC. Decay heat is being removed by discharging steam to the Main Condenser and RCIC.</br>The cause of the Main Turbine Trip is currently under investigation.</br>The site is in a normal electrical lineup. </br>The licensee notified the NRC Resident Inspector.ensee notified 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 54185 +, ENS 54185 +, ENS 54185 +, ENS 54185 +, ENS 54185 +, ENS 54185 +, ENS 54185 +, ENS 54185 +, ENS 54185 +, ENS 54185 +, ENS 54185 +, ENS 54185 +, ENS 54185 +, ENS 54185 +  and ENS 54185 +
Initial power
98  +
Initial reactor mode
Power Operation +
Last update date
00:00:00, 27 July 2019  +
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>.
12:30:10, 29 July 2019  +
NRC officer
Jeffrey Whited +
Notification date
22:31:00, 27 July 2019  +
Originated by
David Duesing +
Reactor critical
true  +
Region
NRC Region 3 +
Reporting criterion
10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation +  and 10 CFR 50.72(b)(2)(iv)(A), System Actuation - ECCS Discharge +
Reporting time
-0.0404 d (-0.97 hours, -0.00577 weeks, -0.00133 months)  +
Scram
Automatic Scram +
Site
Perry +
Start date
23:29:00, 27 July 2019  +
State
Ohio +
System
Feedwater +, Main Steam Isolation Valve +, Reactor Pressure Vessel +  and Main Condenser +
Title
Automatic Reactor Scram Due to Main Turbine Trip  +
Topic
Reactor Vessel Water Level +
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.
https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2019/20190729en.html#en54185  +
Unit
1  +
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