Browse wiki

Jump to navigation Jump to search
ENS 48656
Show incoming properties
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 +  and 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material +
Current power
100  +
Current reactor mode
Power Operation +
Description
Technical Specification 3.6.4.1 (Secondary … Technical Specification 3.6.4.1 (Secondary Containment) requires that the secondary containment be operable. Surveillance requirement 3.6.4.1.3 requires verifying each secondary containment access inner door or each secondary containment access outer door in each access opening is closed.</br>Maintenance personnel were moving scaffolding through Reactor Building outer security door (R-304) when an equipment operator opened inner door (R-305) to exit the Reactor Building. This resulted in both the Reactor Building inner and outer access doors being simultaneously open for a short duration. Normally, the doors are interlocked in which the inner door would not be able to be opened prior to the outer security door being closed.</br>The equipment operator immediately closed the door and notified the Main Control Room. The outer security door (R-304) has been key-locked closed, until corrective actions can be determined.</br>Columbia Generating Station is investigating why the interlock feature failed.</br>There were no radiological releases associated with this event.</br>No safety system actuations or isolations occurred.</br>The licensee has notified the NRC Resident Inspector.</br>Note: See similar event reported by licensee on 12/30/12, EN #48639, involving containment door interlock failure on doors R-204 and R-205.nterlock failure on doors R-204 and R-205.  +
Discovered date
22:27:00, 7 January 2013  +
ENS
ENS 48639 +
ENS id number
48,656  +
Emergency class
Non Emergency +
Entered date
19:29:00, 7 January 2013  +
Event date
22:27:00, 7 January 2013  +
Event description
Technical Specification 3.6.4.1 (Secondary … Technical Specification 3.6.4.1 (Secondary Containment) requires that the secondary containment be operable. Surveillance requirement 3.6.4.1.3 requires verifying each secondary containment access inner door or each secondary containment access outer door in each access opening is closed.</br>Maintenance personnel were moving scaffolding through Reactor Building outer security door (R-304) when an equipment operator opened inner door (R-305) to exit the Reactor Building. This resulted in both the Reactor Building inner and outer access doors being simultaneously open for a short duration. Normally, the doors are interlocked in which the inner door would not be able to be opened prior to the outer security door being closed.</br>The equipment operator immediately closed the door and notified the Main Control Room. The outer security door (R-304) has been key-locked closed, until corrective actions can be determined.</br>Columbia Generating Station is investigating why the interlock feature failed.</br>There were no radiological releases associated with this event.</br>No safety system actuations or isolations occurred.</br>The licensee has notified the NRC Resident Inspector.</br>Note: See similar event reported by licensee on 12/30/12, EN #48639, involving containment door interlock failure on doors R-204 and R-205.nterlock failure on doors R-204 and R-205.  +
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 48656 +, ENS 48656 +, ENS 48656 +, ENS 48656 +, ENS 48656 +, ENS 48656 +, ENS 48656 +, ENS 48656 +, ENS 48656 +, ENS 48656 +, ENS 48656 +, ENS 48656 +, ENS 48656 +, ENS 48656 +, ENS 48656 +  and ENS 48656 +
Initial power
100  +
Initial reactor mode
Power Operation +
Last update date
00:00:00, 7 January 2013  +
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>.
22:23:26, 24 September 2017  +
NRC officer
Bill Huffman +
Notification date
19:29:00, 7 January 2013  +
Originated by
Ryan Oakes +
Reactor critical
true  +
Reactor scram
false  +
Reactor type
GE-5 +
Region
NRC Region 4 +
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
-0.124 d (-2.97 hours, -0.0177 weeks, -0.00407 months)  +
SR
SR-3.6.4.1.3 +
Site
Columbia +
Start date
22:27:00, 7 January 2013  +
State
Washington +
System
Secondary containment +
TS
TS-3.6.4.1 +
Title
Secondary Containment Momentarily Inoperable  +
Topic
Scaffolding +
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/2013/20130108en.html#en48656  +
Unit
2  +
Retrieved from "https://kanterella.com/Special:Browse/:ENS-2048656"