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The following information was provided by … The following information was provided by the licensee via facsimile (licensee text in quotes):</br>At 1629 (EST) on March 2, 2005, McGuire Nuclear Station Unit 2 experienced an automatic actuation of the 2A and 2B Motor Driven Auxiliary Feedwater (MDCA) Pumps. At the time of these actuations, Unit 2 was in MODE 3 in a refueling outage, the 2A Main Feedwater (CF) Pump was in service and, as per procedure, the 2B CF Pump was in a tripped condition and out of service. </br>While performing system evolutions, Unit 2 CF system pressure unexpectedly dropped to a level that caused initiation of a low CF pump suction pressure signal which tripped the 2A CF Pump. Since the 2B CF Pump had previously been placed in a tripped condition, the logic for automatic start of the 2A and 2B MDCA Pumps was satisfied and these pumps started as designed. Since the 2A and 2B MDCA Pumps started in response to actual plant conditions or parameters satisfying the requirements for initiation of the Auxiliary Feedwater (CA) System safety function, this represented a valid actuation of the CA system reportable under the requirements of 10 CFR 50.72(b)(3)(iv)(A) .</br>Note that the 2A and 2B MDCA Pumps started and operated normally and Unit 2 remained in a stable condition during this event. Unit 2 CF system parameters and alignments have been returned to normal for the current plant MODE and conditions. The 2A and 2B CA Pumps are now off.</br>The licensee notified the NRC Resident Inspector.ensee notified the NRC Resident Inspector. +
21:29:00, 2 March 2005 +
41,457 +
20:15:00, 2 March 2005 +
21:29:00, 2 March 2005 +
The following information was provided by … The following information was provided by the licensee via facsimile (licensee text in quotes):</br>At 1629 (EST) on March 2, 2005, McGuire Nuclear Station Unit 2 experienced an automatic actuation of the 2A and 2B Motor Driven Auxiliary Feedwater (MDCA) Pumps. At the time of these actuations, Unit 2 was in MODE 3 in a refueling outage, the 2A Main Feedwater (CF) Pump was in service and, as per procedure, the 2B CF Pump was in a tripped condition and out of service. </br>While performing system evolutions, Unit 2 CF system pressure unexpectedly dropped to a level that caused initiation of a low CF pump suction pressure signal which tripped the 2A CF Pump. Since the 2B CF Pump had previously been placed in a tripped condition, the logic for automatic start of the 2A and 2B MDCA Pumps was satisfied and these pumps started as designed. Since the 2A and 2B MDCA Pumps started in response to actual plant conditions or parameters satisfying the requirements for initiation of the Auxiliary Feedwater (CA) System safety function, this represented a valid actuation of the CA system reportable under the requirements of 10 CFR 50.72(b)(3)(iv)(A) .</br>Note that the 2A and 2B MDCA Pumps started and operated normally and Unit 2 remained in a stable condition during this event. Unit 2 CF system parameters and alignments have been returned to normal for the current plant MODE and conditions. The 2A and 2B CA Pumps are now off.</br>The licensee notified the NRC Resident Inspector.ensee notified the NRC Resident Inspector. +
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00:00:00, 2 March 2005 +
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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21:29:00, 2 March 2005 +
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