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ENS 43149
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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)(ii)(A), Seriously Degraded +  and 10 CFR 50.72#b3vD +
Current power
100  +
Current reactor mode
Power Operation +
Description
The Control Room Emergency Filtration Syst … The Control Room Emergency Filtration System (CREFS) was declared inoperable at 1957 on 02/03/07 due to W-14B, 'F-16 Control Room Charcoal Filter Fan,' being declared inoperable during monthly Technical Specification surveillance testing. Upon subsequent investigation of the inoperability of the W-14B fan, the W-14A fan was declared inoperable at 1415 CST on 02/06/07. The cause of the failure of the fans is under investigation.</br>These fans are required to be operable to support operability of the CREFS System. This condition is covered by TS 3.7.9 'Control Room Emergency Filtration System' and both units have entered Action Condition A 'CREFS Inoperable,' with a Required Action to 'Restore CREFS to an OPERABLE Status' by 1957 CST on 02/10/07. </br>Although the W-14 fans are redundant, CREFS is a single train system. Based on the guidance in NUREG-1022 for single train systems that perform safety functions, this condition was determined to be reportable under 10 CFR 50.72(b)(3)(v)(D), 'Event or Condition That Could Have Prevented Fulfillment of a Safety Function.' Additionally, the failure places PBNP CREFS in a degraded condition that significantly affects plant safety under 50.72(b)(3)(ii)(A), 'Degraded or Unanalyzed Condition.'</br>The licensee notified the NRC Resident Inspector.ensee notified the NRC Resident Inspector.  +
Discovered date
20:15:00, 6 February 2007  +
ENS id number
43,149  +
Emergency class
Non Emergency +
Entered date
19:08:00, 6 February 2007  +
Event date
20:15:00, 6 February 2007  +
Event description
The Control Room Emergency Filtration Syst … The Control Room Emergency Filtration System (CREFS) was declared inoperable at 1957 on 02/03/07 due to W-14B, 'F-16 Control Room Charcoal Filter Fan,' being declared inoperable during monthly Technical Specification surveillance testing. Upon subsequent investigation of the inoperability of the W-14B fan, the W-14A fan was declared inoperable at 1415 CST on 02/06/07. The cause of the failure of the fans is under investigation.</br>These fans are required to be operable to support operability of the CREFS System. This condition is covered by TS 3.7.9 'Control Room Emergency Filtration System' and both units have entered Action Condition A 'CREFS Inoperable,' with a Required Action to 'Restore CREFS to an OPERABLE Status' by 1957 CST on 02/10/07. </br>Although the W-14 fans are redundant, CREFS is a single train system. Based on the guidance in NUREG-1022 for single train systems that perform safety functions, this condition was determined to be reportable under 10 CFR 50.72(b)(3)(v)(D), 'Event or Condition That Could Have Prevented Fulfillment of a Safety Function.' Additionally, the failure places PBNP CREFS in a degraded condition that significantly affects plant safety under 50.72(b)(3)(ii)(A), 'Degraded or Unanalyzed Condition.'</br>The licensee notified the NRC Resident Inspector.ensee notified the NRC Resident Inspector.  +
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ENS 43149 +, ENS 43149 +, ENS 43149 +, ENS 43149 +, ENS 43149 +, ENS 43149 +, ENS 43149 +, ENS 43149 +, ENS 43149 +, ENS 43149 +, ENS 43149 +, ENS 43149 +, ENS 43149 +  and ENS 43149 +
Initial power
100  +
Initial reactor mode
Power Operation +
LER
05000266/LER-2007-001, Re CREFS Inoperability, Both Control Room Charcoal Filter Fans Inoperable +, Re CREFS Inoperability +  and Both Control Room Charcoal Filter Fans Inoperable +
Last update date
00:00:00, 6 February 2007  +
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>.
22:37:20, 24 September 2017  +
NRC officer
Bill Huffman +
NUREG
NUREG-1022, Rev. 3, Supplement 2, Event Report Guidelines 10 CFR 50.72(b)(3)(ii) and 10 CFR 50.73(a)(2)(ii) Final Report +
Notification date
19:08:00, 6 February 2007  +
Originated by
Eric Schultz +
Reactor critical
true  +
Reactor scram
false  +
Reactor type
Westinghouse PWR 2-Loop +
Region
NRC Region 3 +
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)(ii)(A), Seriously Degraded +
Reporting time
-0.0467 d (-1.12 hours, -0.00667 weeks, -0.00153 months)  +
Site
Point Beach +
Start date
20:15:00, 6 February 2007  +
State
Wisconsin +
System
Control Room Emergency Filtration System +
TS
TS-3.7.9 +
Title
Control Room Emergency Filtration System Declared Inoperable  +
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/2007/20070207en.html#en43149  +
Unit
1  +  and 2  +
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