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ENS 51838
Show incoming properties 
Category
ENS Notification  and Power Reactor
CFR
10 CFR 50.72(b)(3)(iv)(A), System Actuation +  and 10 CFR 50.72#b3ivA +
Current power
0  +  and 100  +
Current reactor mode
Power Operation +  and Refueling +
Description
On March 31, 2016 at 0603 (EDT), with Susq … On March 31, 2016 at 0603 (EDT), with Susquehanna Unit 1 in its 19th Refueling and Inspection Outage, Unit 1 received a valid isolation signal. Preliminary investigation indicates the isolation signal was the result of a human performance error.</br>The systems affected by the isolation signal responded as designed for the current shutdown plant conditions.</br>This isolation of multiple primary containment isolation systems is being reported under 10CFR50.72(b)(3)(iv)(A) and per the guidance of NUREG 1022, Rev. 3, section 3.2.6 as a system actuation.</br>The licensee notified the NRC Resident Inspector.ensee notified the NRC Resident Inspector.  +
Discovered date
10:03:00, 31 March 2016  +
Emergency class
Non Emergency +
Entered date
12:45:00, 31 March 2016  +
Event date
10:03:00, 31 March 2016  +
Event description
On March 31, 2016 at 0603 (EDT), with Susq … On March 31, 2016 at 0603 (EDT), with Susquehanna Unit 1 in its 19th Refueling and Inspection Outage, Unit 1 received a valid isolation signal. Preliminary investigation indicates the isolation signal was the result of a human performance error.</br>The systems affected by the isolation signal responded as designed for the current shutdown plant conditions.</br>This isolation of multiple primary containment isolation systems is being reported under 10CFR50.72(b)(3)(iv)(A) and per the guidance of NUREG 1022, Rev. 3, section 3.2.6 as a system actuation.</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 51838 +, ENS 51838 +, ENS 51838 +, ENS 51838 +, ENS 51838 +, ENS 51838 +, ENS 51838 +, ENS 51838 +, ENS 51838 +, ENS 51838 +, ENS 51838 +, ENS 51838 +, ENS 51838 +  and ENS 51838 +
Initial power
0  +  and 100  +
Initial reactor mode
Power Operation +  and Refueling +
Last update date
00:00:00, 31 March 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>.
01:45:25, 2 March 2018  +
NRC officer
Vince Klco +
NUREG
NUREG-1022, Rev. 3, Supplement 2, Event Report Guidelines 10 CFR 50.72(b)(3)(ii) and 10 CFR 50.73(a)(2)(ii) Final Report +
Notification date
12:45:00, 31 March 2016  +
Originated by
Lonnie Crawford +
Reactor critical
false  +  and true  +
Reactor scram
false  +
Reactor type
GE-4 +
Region
NRC Region 1 +
Reporting criterion
10 CFR 50.72(b)(3)(iv)(A), System Actuation +
Reporting time
0.113 d (2.7 hours, 0.0161 weeks, 0.0037 months)  +
Site
Susquehanna +
Start date
10:03:00, 31 March 2016  +
State
Pennsylvania +
System
Primary Containment Isolation System +
Title
Valid Isolation Signal Due to a Human Performance Error  +
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/2016/20160401en.html#en51838  +
Unit
1  +  and 2  +
 
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