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ENS 51527
Show incoming properties
Category
ENS Notification  and Power Reactor
CFR
10 CFR 50.72(b)(3)(v)(B), Loss of Safety Function - Remove Residual Heat +, 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)(ii)(B), Unanalyzed Condition +
Current power
81  +
Current reactor mode
Power Operation +
Description
On 11/10/2015 at 1502 (EST), Unit 2 MCR (m … On 11/10/2015 at 1502 (EST), Unit 2 MCR (main control room) was notified by workers in containment that 2 ice suits had been dropped into the Unit 2 Containment Reactor Cavity Equipment Pit. Based upon size and location of the dropped suits, Unit 2 entered LCO 3.6.15 (Containment Recirculation Drains) Condition B and LCO 3.0.3 for refueling canal drains being inoperable. The two refueling canal drains and the ice condenser drains function with the ice bed, Containment Spray System and ECCS to limit the pressure and temperature that could be expected following a DBA (Design Basis Accident). Following performance of a Safety Function Determination it was determined that, during the short duration when both coats were in the process of being retrieved, they could have potentially clogged the drains and prevented the fulfillment of safety functions if there was a DBA. Both suits were retrieved from the equipment pit by 1556 (EST) and all LCO conditions were exited.</br>The licensee notified the NRC Resident Inspector.ensee notified the NRC Resident Inspector.  +
Discovered date
20:02:00, 10 November 2015  +
ENS id number
51,527  +
Emergency class
Non Emergency +
Entered date
20:13:00, 10 November 2015  +
Event date
20:02:00, 10 November 2015  +
Event description
On 11/10/2015 at 1502 (EST), Unit 2 MCR (m … On 11/10/2015 at 1502 (EST), Unit 2 MCR (main control room) was notified by workers in containment that 2 ice suits had been dropped into the Unit 2 Containment Reactor Cavity Equipment Pit. Based upon size and location of the dropped suits, Unit 2 entered LCO 3.6.15 (Containment Recirculation Drains) Condition B and LCO 3.0.3 for refueling canal drains being inoperable. The two refueling canal drains and the ice condenser drains function with the ice bed, Containment Spray System and ECCS to limit the pressure and temperature that could be expected following a DBA (Design Basis Accident). Following performance of a Safety Function Determination it was determined that, during the short duration when both coats were in the process of being retrieved, they could have potentially clogged the drains and prevented the fulfillment of safety functions if there was a DBA. Both suits were retrieved from the equipment pit by 1556 (EST) and all LCO conditions were exited.</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 51527 +, ENS 51527 +, ENS 51527 +, ENS 51527 +, ENS 51527 +, ENS 51527 +, ENS 51527 +, ENS 51527 +, ENS 51527 +, ENS 51527 +, ENS 51527 +, ENS 51527 +, ENS 51527 +, ENS 51527 +, ENS 51527 +  and ENS 51527 +
Initial power
81  +
Initial reactor mode
Power Operation +
Last update date
00:00:00, 10 November 2015  +
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>.
01:46:22, 2 March 2018  +
NRC officer
Daniel Mills +
Notification date
20:13:00, 10 November 2015  +
Originated by
Clay Camenisch +
Reactor critical
true  +
Reactor scram
false  +
Reactor type
Westinghouse PWR 4-Loop +
Region
NRC Region 2 +
Reporting criterion
10 CFR 50.72(b)(3)(v)(B), Loss of Safety Function - Remove Residual Heat +, 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)(ii)(B), Unanalyzed Condition +
Reporting time
0.0075 d (0.18 hours, 0.00107 weeks, 2.46564e-4 months)  +
Site
Sequoyah +
Start date
20:02:00, 10 November 2015  +
State
Tennessee +
System
Containment Spray +
TS
TS-3.0.3 +  and TS-3.6.15 +
Title
Unanalyzed Condition Due to Debris Dropped Into Reactor Cavity Equipment Pit  +
Topic
Unanalyzed Condition +
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/2015/20151112en.html#en51527  +
Unit
2  +
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