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Switchyard line 2001 tripped and re-energi … Switchyard line 2001 tripped and re-energized during a thunderstorm. This caused main generator output breaker, ACB 3-4, to trip open. At this time '1D' reactor coolant pump (RCP) tripped and caused a reactor trip. Cause for the '1D' RCP trip is under investigation.</br>The heat sink is being provided by Aux Feedwater and the use of Steam Dumps. Electrical power is being provided by offsite power.</br>All rods inserted. There were no complications during the trip and all systems functioned as required. Offsite power remained available throughout the transient. The electrical transient had no impact on Unit 2.</br>The licensee notified the NRC Resident Inspector.</br>* * * UPDATE AT 2217 EDT ON 6/28/07 FROM B. SHEAR TO W. HUFFMAN * * *</br>This is a revision to a previously transmitted ENS call on 6/27/07 EN# 43449. </br>Braidwood Unit 1 Reactor automatically tripped on a loss of '1D' RCP greater than P-8 setpoint. The cause of the RCP trip was an electrical disturbance during a thunderstorm.</br>The reactor trip automatically caused a main turbine and generator trip. Auxiliary feedwater system automatically started on the low-2 S/G water level that is expected from a full power reactor trip. Auxiliary feedwater and main steam dumps are providing a heat sink.</br>A switchyard line also tripped during this electrical transient causing multiple switchyard breakers to open. Electrical power is being provided by offsite power.</br>All control rods fully inserted. There were no complications during the trip and all systems functioned as required. Offsite power remained available throughout the transient. The electrical disturbance had no impact on Unit 2.</br>The licensee notified the NRC resident inspector." R3DO (Louden) notified.ent inspector." R3DO (Louden) notified. +
14:21:00, 27 June 2007 +
43,449 +
11:34:00, 27 June 2007 +
14:21:00, 27 June 2007 +
Switchyard line 2001 tripped and re-energi … Switchyard line 2001 tripped and re-energized during a thunderstorm. This caused main generator output breaker, ACB 3-4, to trip open. At this time '1D' reactor coolant pump (RCP) tripped and caused a reactor trip. Cause for the '1D' RCP trip is under investigation.</br>The heat sink is being provided by Aux Feedwater and the use of Steam Dumps. Electrical power is being provided by offsite power.</br>All rods inserted. There were no complications during the trip and all systems functioned as required. Offsite power remained available throughout the transient. The electrical transient had no impact on Unit 2.</br>The licensee notified the NRC Resident Inspector.</br>* * * UPDATE AT 2217 EDT ON 6/28/07 FROM B. SHEAR TO W. HUFFMAN * * *</br>This is a revision to a previously transmitted ENS call on 6/27/07 EN# 43449. </br>Braidwood Unit 1 Reactor automatically tripped on a loss of '1D' RCP greater than P-8 setpoint. The cause of the RCP trip was an electrical disturbance during a thunderstorm.</br>The reactor trip automatically caused a main turbine and generator trip. Auxiliary feedwater system automatically started on the low-2 S/G water level that is expected from a full power reactor trip. Auxiliary feedwater and main steam dumps are providing a heat sink.</br>A switchyard line also tripped during this electrical transient causing multiple switchyard breakers to open. Electrical power is being provided by offsite power.</br>All control rods fully inserted. There were no complications during the trip and all systems functioned as required. Offsite power remained available throughout the transient. The electrical disturbance had no impact on Unit 2.</br>The licensee notified the NRC resident inspector." R3DO (Louden) notified.ent inspector." R3DO (Louden) notified. +
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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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