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ENS 54378
Show incoming properties
Category
ENS Notification  and Power Reactor
CFR
10 CFR 50.72(b)(3)(v)(A), Loss of Safety Function - Shutdown the Reactor +  and 10 CFR 50.72#b3vA +
Current power
0  +
Current reactor mode
Refueling +
Description
At November 9, 2019, at 0635 EST, it was d … At November 9, 2019, at 0635 EST, it was discovered that both source range instrumentation channels were simultaneously inoperable; therefore, this condition is being reported as an eight-hour, non-emergency notification per 10 CFR 50.72(b)(3)(v)(A). The neutron flux monitoring system was OPERABLE during this time period.</br> </br>NRC Resident Inspectors have been notified.</br>It was determined that with one of two source range instruments out of service for planned maintenance, an operator found the other operable source range instrument out-of-calibration. Upon further investigation, the out-of-calibration instrument had a bad potentiometer with its power supply, thus rendering both instruments inoperable.hus rendering both instruments inoperable.  +
Discovered date
11:35:00, 9 November 2019  +
ENS id number
54,378  +
Emergency class
Non Emergency +
Entered date
13:28:00, 9 November 2019  +
Event date
11:35:00, 9 November 2019  +
Event description
At November 9, 2019, at 0635 EST, it was d … At November 9, 2019, at 0635 EST, it was discovered that both source range instrumentation channels were simultaneously inoperable; therefore, this condition is being reported as an eight-hour, non-emergency notification per 10 CFR 50.72(b)(3)(v)(A). The neutron flux monitoring system was OPERABLE during this time period.</br> </br>NRC Resident Inspectors have been notified.</br>It was determined that with one of two source range instruments out of service for planned maintenance, an operator found the other operable source range instrument out-of-calibration. Upon further investigation, the out-of-calibration instrument had a bad potentiometer with its power supply, thus rendering both instruments inoperable.hus rendering both instruments inoperable.  +
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 54378 +, ENS 54378 +, ENS 54378 +, ENS 54378 +, ENS 54378 +, ENS 54378 +, ENS 54378 +, ENS 54378 +, ENS 54378 +, ENS 54378 +, ENS 54378 +, ENS 54378 +, ENS 54378 +  and ENS 54378 +
Initial power
0  +
Initial reactor mode
Refueling +
Last update date
00:00:00, 9 November 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>.
12:30:07, 11 November 2019  +
NRC officer
Brian P. Smith +
Notification date
13:28:00, 9 November 2019  +
Originated by
Chuck Yarley +
Reactor critical
false  +
Reactor scram
false  +
Region
NRC Region 2 +
Reporting criterion
10 CFR 50.72(b)(3)(v)(A), Loss of Safety Function - Shutdown the Reactor +
Reporting time
0.0783 d (1.88 hours, 0.0112 weeks, 0.00258 months)  +
Site
Harris +
Start date
11:35:00, 9 November 2019  +
State
North Carolina +
Title
Both Source Range Instruments Found Inoperable  +
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/2019/20191111en.html#en54378  +
Unit
1  +
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