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During maintenance testing of the 'B' Cont … During maintenance testing of the 'B' Control Room Emergency Ventilation system (CRV) the 'A' Air conditioning unit was running. The 'A' A/C unit (V-EAC-14A) tripped on a low service water flow condition while performing step 0255-11-III-4 which manipulated service water valves for the test. The 'B' loop of the CRV system was in a 30 day LCO due to the maintenance testing. When the 'A' A/C unit tripped and the 'B' unit inoperable due to testing, both CRV trains were inoperable and that placed the unit in a 24 hour Tech Spec LCO, 3.17.A.3.a. The compressor unit V-EAC-14A was reset following restart of the 13 Emergency Service Water pump 8 minutes after the trip and exited the 24 hour LCO.</br> The licensee notified the NRC Resident Inspector.</br>* * * UPDATE FROM R. SCHREIFELS TO J. KNOKE AT 12:35 EDT ON 8/19/05 * * *</br>The notification was initiated due to both trains of the Control Room Ventilation system being inoperable and was reported under 50.72 (b)(v)(D) as an event or condition that could have prevented fulfillment of a safety function.</br>Monticello is retracting the event notification based on further investigation of the event. Successful completion of subsequent testing indicated that the 'B' train was still capable of performing its required safety function when the 'A' train tripped. Therefore Monticello has determined there was no loss of safety function as reported in Event Notification #41897. Additional investigation is ongoing and any identified issues will be entered into the station's corrective action program.</br>The licensee notified the NRC Resident Inspector. Notified R3DO(S. Burgess).ent Inspector. Notified R3DO(S. Burgess). +
22:54:00, 5 August 2005 +
41,897 +
22:46:00, 5 August 2005 +
22:54:00, 5 August 2005 +
During maintenance testing of the 'B' Cont … During maintenance testing of the 'B' Control Room Emergency Ventilation system (CRV) the 'A' Air conditioning unit was running. The 'A' A/C unit (V-EAC-14A) tripped on a low service water flow condition while performing step 0255-11-III-4 which manipulated service water valves for the test. The 'B' loop of the CRV system was in a 30 day LCO due to the maintenance testing. When the 'A' A/C unit tripped and the 'B' unit inoperable due to testing, both CRV trains were inoperable and that placed the unit in a 24 hour Tech Spec LCO, 3.17.A.3.a. The compressor unit V-EAC-14A was reset following restart of the 13 Emergency Service Water pump 8 minutes after the trip and exited the 24 hour LCO.</br> The licensee notified the NRC Resident Inspector.</br>* * * UPDATE FROM R. SCHREIFELS TO J. KNOKE AT 12:35 EDT ON 8/19/05 * * *</br>The notification was initiated due to both trains of the Control Room Ventilation system being inoperable and was reported under 50.72 (b)(v)(D) as an event or condition that could have prevented fulfillment of a safety function.</br>Monticello is retracting the event notification based on further investigation of the event. Successful completion of subsequent testing indicated that the 'B' train was still capable of performing its required safety function when the 'A' train tripped. Therefore Monticello has determined there was no loss of safety function as reported in Event Notification #41897. Additional investigation is ongoing and any identified issues will be entered into the station's corrective action program.</br>The licensee notified the NRC Resident Inspector. Notified R3DO(S. Burgess).ent Inspector. Notified R3DO(S. Burgess). +
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100 +
00:00:00, 19 August 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>.
02:20:24, 2 March 2018 +
22:46:00, 5 August 2005 +
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-0.00542 d (-0.13 hours, -7.738095e-4 weeks, -1.78074e-4 months) +
22:54:00, 5 August 2005 +
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