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ENS 48189
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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
Unit 1 Manual Reactor Trip was initiated i … Unit 1 Manual Reactor Trip was initiated in anticipation of an auto turbine trip due to operators noticing the turbine governor valves closing in response to an Electro-Hydraulic Control System signal. All Control Rods are fully inserted. The RCS is being cooled by forced flow (reactor coolant pumps). Secondary heat sink is being provided by the condenser steam dumps utilizing the main feedwater system. The auxiliary feedwater system actuated based on low steam generator level, but has since been secured. There were no unexpected (inconsistent with nature of trip) pressure or level transients. Offsite power remains available. No release occurred nor is ongoing. Emergency Core Cooling did not actuate. No unexpected isolations occurred. Emergency Plan entry was not required.</br>The licensee informed the NRC Resident Inspector.ensee informed the NRC Resident Inspector.  +
Discovered date
01:31:00, 15 August 2012  +
ENS id number
48,189  +
Emergency class
Non Emergency +
Entered date
00:02:00, 15 August 2012  +
Equipment trip
Turbine Trip +
Event date
01:31:00, 15 August 2012  +
Event description
Unit 1 Manual Reactor Trip was initiated i … Unit 1 Manual Reactor Trip was initiated in anticipation of an auto turbine trip due to operators noticing the turbine governor valves closing in response to an Electro-Hydraulic Control System signal. All Control Rods are fully inserted. The RCS is being cooled by forced flow (reactor coolant pumps). Secondary heat sink is being provided by the condenser steam dumps utilizing the main feedwater system. The auxiliary feedwater system actuated based on low steam generator level, but has since been secured. There were no unexpected (inconsistent with nature of trip) pressure or level transients. Offsite power remains available. No release occurred nor is ongoing. Emergency Core Cooling did not actuate. No unexpected isolations occurred. Emergency Plan entry was not required.</br>The licensee informed the NRC Resident Inspector.ensee informed the NRC Resident Inspector.  +
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ENS 48189 +, ENS 48189 +, ENS 48189 +, ENS 48189 +, ENS 48189 +, ENS 48189 +, ENS 48189 +, ENS 48189 +, ENS 48189 +, ENS 48189 +, ENS 48189 +, ENS 48189 +, ENS 48189 +, ENS 48189 +  and ENS 48189 +
Initial power
100  +
Initial reactor mode
Power Operation +
Last update date
00:00:00, 15 August 2012  +
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>.
02:03:24, 2 March 2018  +
NRC officer
Steve Sandin +
Notification date
00:02:00, 15 August 2012  +
Originated by
Mary Sipiorski +
Reactor critical
true  +
Reactor scram
true  +
Reactor type
Westinghouse PWR 2-Loop +
Region
NRC Region 3 +
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
-0.0617 d (-1.48 hours, -0.00881 weeks, -0.00203 months)  +
Scram
Manual Scram +
Site
Point Beach +
Start date
01:31:00, 15 August 2012  +
State
Wisconsin +
System
Steam Generator +, Feedwater +, Auxiliary Feedwater +, Control Rod +  and Electro-Hydraulic Control +
Title
Unit 1 Manually Tripped in Anticipation of an Automatic Turbine Trip  +
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http://www.nrc.gov/reading-rm/doc-collections/event-status/event/2012/20120816en.html#en48189  +
Unit
1  +
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