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Lightening Scrammed Nuclear Reactor Still at Zero Power

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NASA lightening
Riverbend nuclear power station
Riverbend Nuclear Power Station near St. Francisville, Louisiana

AUTOMATIC REACTOR SCRAM ON MAIN STEAM ISOLATION DUE TO ELECTRICAL FAULT

On 1/9/16 at 0237 [CST], River Bend Station sustained a reactor scram during a lightning storm. An electrical transient occurred resulting in a full main steam isolation [MSIV] (Group 6) and a Division II Balance of Plant isolation signal. During the scram, level 8 occurred immediately which tripped the feed pumps. A level 3 signal occurred also during the scram. Subsequent level 3 was received three times due to isolated vessel level control. The plant was stabilized and all spurious isolation signals reset, then the MSIVs were restored. The plant is now stable in Mode 3 and plant walkdowns are occurring to assess the transient.”

During the scram, all rods inserted into the core. The plant was initially cooled down using safety relief valves. Offsite power is available and the…

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January 17, 2016 - Posted by | Uncategorized

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