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At 03:58 on 11-08-05, D.C. Cook Unit 2 exp … At 03:58 on 11-08-05, D.C. Cook Unit 2 experienced an automatic, reactor trip due to Reactor Coolant Pump Bus Undervoltage. The cause of the reactor trip its under investigation. This requires a 4-hour report under 10CFR50.72(b)(2)(iv)(B).</br>All four reactor coolant pumps have remained running.</br>The Unit 2 Turbine Driven Auxiliary Feedwater Rump (TDAFP) started automatically due to low-low levels in at least two steam generators which is expected for a reactor trip from 100% power. The 'B' train Emergency Diesel Generator (2AB EDG) automatically started and loaded "B" train emergency bus T21A. These automatic actuations of the reactor protection system, TDAFP start, and 2A13 EDG start require an 8-hour report under I OCFR50.72(b)(3)(iv)(A).</br>'B' train emergency bus T21B was declared inoperable after it failed to be energized automatically on the start of the 2AB EDG. The cause of this failure is under investigation.</br>The 'A' train Emergency Diesel Generator (2CD EDG) had been inoperable for scheduled maintenance during the time of the event. It was restored to operable status at 06:06.</br>All control rods fully inserted. Steam generators are discharging steam to the main condenser using steam dumps.</br>The licensee notified the NRC Resident Inspector.ensee notified the NRC Resident Inspector. +
08:58:00, 8 November 2005 +
42,125 +
07:10:00, 8 November 2005 +
08:58:00, 8 November 2005 +
At 03:58 on 11-08-05, D.C. Cook Unit 2 exp … At 03:58 on 11-08-05, D.C. Cook Unit 2 experienced an automatic, reactor trip due to Reactor Coolant Pump Bus Undervoltage. The cause of the reactor trip its under investigation. This requires a 4-hour report under 10CFR50.72(b)(2)(iv)(B).</br>All four reactor coolant pumps have remained running.</br>The Unit 2 Turbine Driven Auxiliary Feedwater Rump (TDAFP) started automatically due to low-low levels in at least two steam generators which is expected for a reactor trip from 100% power. The 'B' train Emergency Diesel Generator (2AB EDG) automatically started and loaded "B" train emergency bus T21A. These automatic actuations of the reactor protection system, TDAFP start, and 2A13 EDG start require an 8-hour report under I OCFR50.72(b)(3)(iv)(A).</br>'B' train emergency bus T21B was declared inoperable after it failed to be energized automatically on the start of the 2AB EDG. The cause of this failure is under investigation.</br>The 'A' train Emergency Diesel Generator (2CD EDG) had been inoperable for scheduled maintenance during the time of the event. It was restored to operable status at 06:06.</br>All control rods fully inserted. Steam generators are discharging steam to the main condenser using steam dumps.</br>The licensee notified the NRC Resident Inspector.ensee notified the NRC Resident Inspector. +
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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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