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The Division 1 Control Room Emergency Filt … The Division 1 Control Room Emergency Filtration System (CREF) was inoperable for scheduled replacement of charcoal. During the scheduled maintenance, Division 2 CREF was placed into service. Approximately 5 minutes after startup (1446 CDT on 8/5/2014), the Division 2 CREF recirculation fan tripped off for unknown reasons. This rendered both trains of CREF inoperable. This required entry into Technical Specification TS 3.0.3.</br>This is being reported pursuant to 10 CFR 50.72(b)(3)(v)(D) as an event or condition that could have prevented the fulfillment of the safety function of structures or systems that are needed to (D) Mitigate the consequences of an accident. </br>At 1707 CDT on 8/5/2014, the Division 1 CREF train maintenance was completed and the Division 1 CREF was declared operable. TS 3.0.3 was exited at this time.</br>Investigation is in progress to determine the cause of the Division 2 CREF trip.</br>The control room boundary was not challenged during this time period with any change in radiation levels as plant operation was unaffected. Thus, the health and safety of the public was not affected.</br>The licensee notified the NRC Resident Inspector and the State of Minnesota Duty Officer.r and the State of Minnesota Duty Officer. +
19:46:00, 5 August 2014 +
20:53:00, 5 August 2014 +
19:46:00, 5 August 2014 +
The Division 1 Control Room Emergency Filt … The Division 1 Control Room Emergency Filtration System (CREF) was inoperable for scheduled replacement of charcoal. During the scheduled maintenance, Division 2 CREF was placed into service. Approximately 5 minutes after startup (1446 CDT on 8/5/2014), the Division 2 CREF recirculation fan tripped off for unknown reasons. This rendered both trains of CREF inoperable. This required entry into Technical Specification TS 3.0.3.</br>This is being reported pursuant to 10 CFR 50.72(b)(3)(v)(D) as an event or condition that could have prevented the fulfillment of the safety function of structures or systems that are needed to (D) Mitigate the consequences of an accident. </br>At 1707 CDT on 8/5/2014, the Division 1 CREF train maintenance was completed and the Division 1 CREF was declared operable. TS 3.0.3 was exited at this time.</br>Investigation is in progress to determine the cause of the Division 2 CREF trip.</br>The control room boundary was not challenged during this time period with any change in radiation levels as plant operation was unaffected. Thus, the health and safety of the public was not affected.</br>The licensee notified the NRC Resident Inspector and the State of Minnesota Duty Officer.r and the State of Minnesota Duty Officer. +
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89 +
00:00:00, 5 August 2014 +
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>.
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20:53:00, 5 August 2014 +
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19:46:00, 5 August 2014 +
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