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ENS 45793
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Category
ENS Notification  and Power Reactor
CFR
10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident +, 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material +  and 10 CFR 50.72, Immediate Notification Requirements for Operating Nuclear Power Reactors +
Current power
100  +
Current reactor mode
Power Operation +
Description
System Affected: Standby Gas Treatment (SB … System Affected: Standby Gas Treatment (SBGT)</br>Condition: Demister Door Discovered open rendering both trains of SBGT INOP</br>At 2255 (EDT) on 3/25/2010, a Demister Door on 'B' Train of Standby Gas Treatment (SBGT) was found open. The door was closed upon discovery. The door was opened during performance of a scheduled surveillance during the dayshift and it appears that the door was not closed at the completion of work. With this door being open the 'B' Train of SBGT was INOP. Due to the physical configuration of the SBGT System it cannot be immediately verified that the 'A' Train of SBGT would have been able to perform its Safety Related Function since there is a probability that it could have drawn suction through the demister door of the 'B' Train and a normally open crosstie between the Trains. A 10 CFR 50.72 notification is conservatively being made based on the information currently available.</br>This condition has no impact on the health and safety of the public.</br>Both trains of SBGT are currently operable.</br>The licensee informed the NRC Resident Inspector.ensee informed the NRC Resident Inspector.  +
Discovered date
02:55:00, 26 March 2010  +
ENS id number
45,793  +
Emergency class
Non Emergency +
Entered date
03:05:00, 26 March 2010  +
Event date
02:55:00, 26 March 2010  +
Event description
System Affected: Standby Gas Treatment (SB … System Affected: Standby Gas Treatment (SBGT)</br>Condition: Demister Door Discovered open rendering both trains of SBGT INOP</br>At 2255 (EDT) on 3/25/2010, a Demister Door on 'B' Train of Standby Gas Treatment (SBGT) was found open. The door was closed upon discovery. The door was opened during performance of a scheduled surveillance during the dayshift and it appears that the door was not closed at the completion of work. With this door being open the 'B' Train of SBGT was INOP. Due to the physical configuration of the SBGT System it cannot be immediately verified that the 'A' Train of SBGT would have been able to perform its Safety Related Function since there is a probability that it could have drawn suction through the demister door of the 'B' Train and a normally open crosstie between the Trains. A 10 CFR 50.72 notification is conservatively being made based on the information currently available.</br>This condition has no impact on the health and safety of the public.</br>Both trains of SBGT are currently operable.</br>The licensee informed the NRC Resident Inspector.ensee informed 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 45793 +, ENS 45793 +, ENS 45793 +, ENS 45793 +, ENS 45793 +, ENS 45793 +, ENS 45793 +, ENS 45793 +, ENS 45793 +, ENS 45793 +, ENS 45793 +, ENS 45793 +, ENS 45793 +, ENS 45793 +  and ENS 45793 +
Initial power
100  +
Initial reactor mode
Power Operation +
Last update date
00:00:00, 26 March 2010  +
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>.
02:10:02, 2 March 2018  +
NRC officer
Steve Sandin +
Notification date
03:05:00, 26 March 2010  +
Originated by
Michael Hittwer +
Reactor critical
true  +
Reactor scram
false  +
Reactor type
GE-3 +
Region
NRC Region 1 +
Reporting criterion
10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident +  and 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material +
Reporting time
0.00708 d (0.17 hours, 0.00101 weeks, 2.32866e-4 months)  +
Site
Pilgrim +
Start date
02:55:00, 26 March 2010  +
State
Massachusetts +
Title
Standby Gas Treatment Declared Inoperable After Discovery of Open Demister Door  +
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/2010/20100329en.html#en45793  +
Unit
1  +
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