Browns Ferry Operators Respond to a Significant Natural Disaster A Personal Perspective... 2016 National REP Matt Rasmussen Conference Operations Superintendent Browns Ferry NPP
Browns Ferry Nuclear Plant 3 GE BWR Type 4 Reactors o All with Mark 1 Containments o Commercial Operation Uni1 1 – August 1,1974 Unit 2 – March 1, 1975 Unit 3 – March 1, 1977 ~3400 MWe Total Generation ~1400 Employees Located on the Tennessee River Near Athens, Alabama
April 27, 2011 All three units at full power Severe weather was anticipated in the Tennessee Valley area One (of eight) Emergency DG was out of service for scheduled maintenance Severe weather events began early in the day Other TVA nuclear sites and corporate 0142 PM CDT WED APR 27 2011 offices were also affected by severe PROB OF 2 OR MORE TORNADOES: > 95% weather throughout the day PROB OF 1 OR MORE STRONG /F2-F5/ TORNADOES: > 95% PROB OF 10 OR MORE SEVERE WIND EVENTS: > 95% PROB OF 1 OR MORE WIND EVENTS >= 65 KNOTS: > 95% PROB OF 10 OR MORE SEVERE HAIL EVENTS: > 95% PROB OF 1 OR MORE HAIL EVENTS >= 2 INCHES: > 95% PROB OF 6 OR MORE COMBINED SEVERE HAIL/WIND EVENTS: > 95%
Your Main Title 92 TORNADO WARNINGS 31 SEVERE THUNDERSTORM • Your Sub Points WARNINGS 7 FLASH FLOOD WARNINGS 63 ACTUAL TORNADOS 1 TORNADO EMERGENCY
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Take Aways... BFN operators demonstrated that continuing training at BFN prepared them to respond to the events of April 27, 2011, under very difficult circumstances. Greater emphasis on consideration of severe weather and loss of offsite power as multi-unit events during simulator training Additionally, it was noted that due to time constraints simulator scenarios rarely progressed to the point of cooling the reactor down to cold conditions
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