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While performing a purification subsystem … While performing a purification subsystem alignment on the Unit-2 Refueling Water Tank, an inadvertent transfer of Refueling Water Tank level to the common Spent Fuel Pool occurred. This transfer resulted in lowering Unit-2 Refueling Water Tank level below the Technical Specification (TS) required limit for the current mode of operation at 0142 (EDT) on 3/25/17. Upon recognition of the inadvertent transfer, Operations secured the lineup and restored Unit-2 Refueling Water Tank level to its normal operating band at 0225 on 3/25/17.</br>This event is reportable under 10 CFR 50.72(b)(3)(v)(D) '...any event or condition that at the time of discovery could have prevented the fulfillment of the safety function structures or systems that are needed to mitigate the consequences of an accident.' With less than the required Technical Specification volume in the Refueling Water Tank, insufficient volume existed in the Refueling Water Tank to maintain 30 minutes of full flow Safety Injection, and subsequent continued pump operation after transition to recirculation mode of operation.</br>This level is required by Technical Specification 3.5.4.B and has a one hour action statement to restore level. </br>The NRC Resident Inspector has been notified.</br>* * * RETRACTION FROM KENT MILLS TO DONALD NORWOOD AT 1637 EDT ON 3/30/2017 * * *</br>The purpose of this notification is to retract ENS notification 52640 made on March 25, 2017 for Calvert Cliffs. After further evaluation, it has been determined that the volume of water in the Unit 2 Refueling Water Tank was never below the TS required volume of 400,000 gallons. The evaluation considered the as-found condition of the level transmitter and the existing environmental conditions of the tank in determining the actual RWT water volume on the day of the event. Therefore, this event does not meet the criteria of 10 CFR 50.72(b)(3)(v)(D) and the ENS report is being retracted.</br>The licensee will notify the NRC Resident Inspector.</br>Notified R1DO (Cook). Resident Inspector.
Notified R1DO (Cook).
05:42:00, 25 March 2017 +
52,640 +
09:28:00, 25 March 2017 +
05:42:00, 25 March 2017 +
While performing a purification subsystem … While performing a purification subsystem alignment on the Unit-2 Refueling Water Tank, an inadvertent transfer of Refueling Water Tank level to the common Spent Fuel Pool occurred. This transfer resulted in lowering Unit-2 Refueling Water Tank level below the Technical Specification (TS) required limit for the current mode of operation at 0142 (EDT) on 3/25/17. Upon recognition of the inadvertent transfer, Operations secured the lineup and restored Unit-2 Refueling Water Tank level to its normal operating band at 0225 on 3/25/17.</br>This event is reportable under 10 CFR 50.72(b)(3)(v)(D) '...any event or condition that at the time of discovery could have prevented the fulfillment of the safety function structures or systems that are needed to mitigate the consequences of an accident.' With less than the required Technical Specification volume in the Refueling Water Tank, insufficient volume existed in the Refueling Water Tank to maintain 30 minutes of full flow Safety Injection, and subsequent continued pump operation after transition to recirculation mode of operation.</br>This level is required by Technical Specification 3.5.4.B and has a one hour action statement to restore level. </br>The NRC Resident Inspector has been notified.</br>* * * RETRACTION FROM KENT MILLS TO DONALD NORWOOD AT 1637 EDT ON 3/30/2017 * * *</br>The purpose of this notification is to retract ENS notification 52640 made on March 25, 2017 for Calvert Cliffs. After further evaluation, it has been determined that the volume of water in the Unit 2 Refueling Water Tank was never below the TS required volume of 400,000 gallons. The evaluation considered the as-found condition of the level transmitter and the existing environmental conditions of the tank in determining the actual RWT water volume on the day of the event. Therefore, this event does not meet the criteria of 10 CFR 50.72(b)(3)(v)(D) and the ENS report is being retracted.</br>The licensee will notify the NRC Resident Inspector.</br>Notified R1DO (Cook). Resident Inspector.
Notified R1DO (Cook).
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100 +
00:00:00, 30 March 2017 +
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>.
22:15:39, 24 September 2017 +
09:28:00, 25 March 2017 +
true +
false +
0.157 d (3.77 hours, 0.0224 weeks, 0.00516 months) +
05:42:00, 25 March 2017 +
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