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ENS 49574
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#b3vD +
Current power
100  +
Current reactor mode
Power Operation +
Description
This report is being made pursuant to 10CF … This report is being made pursuant to 10CFR50.72(b)(3)(v)(D), Event or Condition that could have prevented fulfillment of a Safety Function needed to Mitigate the Consequences of an Accident. While the 'A' Train of Control Room HVAC was inoperable and out of service for emergent repairs due to a Freon leak, the 'B' Train of Auxiliary Electric Room HVAC became inoperable due to a failure of the Cooler Condenser Fan. The Main Control Room Envelope consists of the Main Control Room and the Auxiliary Electric Equipment Room. Both the Control Room HVAC and the Auxiliary Electric Equipment Room HVAC Systems are required to be Operable in the current Mode.</br>This is a loss of safety function for a system that is intended to mitigate the consequences of an accident and is discussed in Chapter 6 of the UFSAR and is Tech Spec required and is Safety Related. Also, the system, structure, or component (SSC) is inoperable in a required mode in the Tech Spec Applicability and there is no redundant equipment in the same system that is operable.</br>The Required actions of Tech Spec 3.7.5 were entered on 11/22/2013 at 1920 CST when the 'B' train became inoperable. Online Risk remains Green. The station is currently pursuing repairs to both trains.</br>The NRC Resident Inspector has been notified by the licensee.spector has been notified by the licensee.  +
Discovered date
01:20:00, 23 November 2013  +
ENS id number
49,574  +
Emergency class
Non Emergency +
Entered date
23:59:00, 22 November 2013  +
Event date
01:20:00, 23 November 2013  +
Event description
This report is being made pursuant to 10CF … This report is being made pursuant to 10CFR50.72(b)(3)(v)(D), Event or Condition that could have prevented fulfillment of a Safety Function needed to Mitigate the Consequences of an Accident. While the 'A' Train of Control Room HVAC was inoperable and out of service for emergent repairs due to a Freon leak, the 'B' Train of Auxiliary Electric Room HVAC became inoperable due to a failure of the Cooler Condenser Fan. The Main Control Room Envelope consists of the Main Control Room and the Auxiliary Electric Equipment Room. Both the Control Room HVAC and the Auxiliary Electric Equipment Room HVAC Systems are required to be Operable in the current Mode.</br>This is a loss of safety function for a system that is intended to mitigate the consequences of an accident and is discussed in Chapter 6 of the UFSAR and is Tech Spec required and is Safety Related. Also, the system, structure, or component (SSC) is inoperable in a required mode in the Tech Spec Applicability and there is no redundant equipment in the same system that is operable.</br>The Required actions of Tech Spec 3.7.5 were entered on 11/22/2013 at 1920 CST when the 'B' train became inoperable. Online Risk remains Green. The station is currently pursuing repairs to both trains.</br>The NRC Resident Inspector has been notified by the licensee.spector has been notified by the licensee.  +
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ENS 49574 +, ENS 49574 +, ENS 49574 +, ENS 49574 +, ENS 49574 +, ENS 49574 +, ENS 49574 +, ENS 49574 +, ENS 49574 +, ENS 49574 +, ENS 49574 +, ENS 49574 +, ENS 49574 +, ENS 49574 +  and ENS 49574 +
Initial power
100  +
Initial reactor mode
Power Operation +
Last update date
00:00:00, 23 November 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>.
22:21:20, 24 September 2017  +
NRC officer
Daniel Mills +
Notification date
23:59:00, 22 November 2013  +
Originated by
Rudy Caputo +
Reactor critical
true  +
Reactor scram
false  +
Reactor type
GE-5 +
Region
NRC Region 3 +
Reporting criterion
10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident +
Reporting time
-0.0563 d (-1.35 hours, -0.00804 weeks, -0.00185 months)  +
Site
LaSalle +
Start date
01:20:00, 23 November 2013  +
State
Illinois +
System
HVAC +  and Control Room Envelope +
TS
TS-3.7.5 +
Title
Control Room Hvac 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.
http://www.nrc.gov/reading-rm/doc-collections/event-status/event/2013/20131125en.html#en49574  +
Unit
1  +  and 2  +
 
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