Browns Ferry Nuclear Reactor Scrams after water level covering core drops four feet.
TVA’s newest reactor at its oldest nuclear plant automatically shut down Tuesday after power was lost temporarily to two recirculation pumps that supply water to the reactor core, TVA officials said today. The trip of the two pumps at the Unit 3 reactor at the Browns Ferry Nuclear Plant caused the unit to cease power generation around 9:30 a.m. EDT on Tuesday. TVA spokesman Jim Hopson said today that feedwater pumps maintained water in the reactor core, but the unit automatically shut down as designed when water levels covering the fuel rods dropped by about 40 inches. “We still had 13 feet over the reactor rods and the water was quickly restored to the previous level (of about 17 feet above the fuel rods),” Hopson said. The water level covering the core of the reactor dropped 4 feet before the reactor was scramed narowly preventing catastrophe. TVA is keeping the reactor on standby until the investigation is completed, Hopson said. Dave Lochbaum, senior scientist for the Union of Concerned Scientist and a former Browns Ferry and NRC employee, said previous TVA studies of the pumps that circulate water through the reactor core have indicated that an incident like what happened Tuesday should not have occurred. Ooops “Apparently, Browns Ferry operated outside the bounds of its safety study,” Lochbaum said. “Will TVA fix this dilemma before restarting Unit 3? And will TVA do anything to check whether Units 1 and 2 are equally impaired?” Lochbaum said the reactor scram was not of any safety concern (really? seriously?)
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