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A Study of the Fukushima Daiichi Nuclear Accident ProcessFukushima Daiichi Unit 1, 2 and 3 Accidents

A Study of the Fukushima Daiichi Nuclear Accident Process: Fukushima Daiichi Unit 1, 2 and 3... [The Fukushima nuclear power station comprises six power plants, out of which, Unit 1 to Unit 3 were under operation, Unit 4 was under shroud exchange work, and Unit 5 and 6 were out of operation for scheduled maintenance on the day of the accident. This Chapter deals with the essence of this book approaching what was the causes of the accidents on the power plant under operation. The Fukushima site was attacked by the Great East Japan Earthquake (magnitude 9) followed by a giant Tsunami about 13 m high, but its influence was different to each of the plant. As well known, Unit 1 to Unit 3 made core melts and Unit 1, Unit 3 and Unit 4 made hydrogen explosions, and the released radioactivity enforced the residential evacuation. Reactivating a full background knowledge as a nuclear safety expert, I inspected all the published data by the TEPCO very carefully. As the behavior of each BWR plant to the disaster was different, I tried to examine the measured data Unit by Unit, just like a mystery writer but on scientific basis. Finally, a firm scenario to core melt and hydrogen explosion can be derived for each of the plant. I would like to stress that the cause of the core melt was not due to a lack of the water in the reactor but due to the injection of the water from the fire engines yielding chemical reaction with hot Zircaloy.] http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png

A Study of the Fukushima Daiichi Nuclear Accident ProcessFukushima Daiichi Unit 1, 2 and 3 Accidents

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Publisher
Springer Japan
Copyright
© Springer Japan 2015
ISBN
978-4-431-55542-1
Pages
35 –122
DOI
10.1007/978-4-431-55543-8_2
Publisher site
See Chapter on Publisher Site

Abstract

[The Fukushima nuclear power station comprises six power plants, out of which, Unit 1 to Unit 3 were under operation, Unit 4 was under shroud exchange work, and Unit 5 and 6 were out of operation for scheduled maintenance on the day of the accident. This Chapter deals with the essence of this book approaching what was the causes of the accidents on the power plant under operation. The Fukushima site was attacked by the Great East Japan Earthquake (magnitude 9) followed by a giant Tsunami about 13 m high, but its influence was different to each of the plant. As well known, Unit 1 to Unit 3 made core melts and Unit 1, Unit 3 and Unit 4 made hydrogen explosions, and the released radioactivity enforced the residential evacuation. Reactivating a full background knowledge as a nuclear safety expert, I inspected all the published data by the TEPCO very carefully. As the behavior of each BWR plant to the disaster was different, I tried to examine the measured data Unit by Unit, just like a mystery writer but on scientific basis. Finally, a firm scenario to core melt and hydrogen explosion can be derived for each of the plant. I would like to stress that the cause of the core melt was not due to a lack of the water in the reactor but due to the injection of the water from the fire engines yielding chemical reaction with hot Zircaloy.]

Published: Apr 7, 2015

Keywords: Fukushima Daiichi; Core melt; Hydrogen explosion; TMI; PBF; Suppression chamber; Dry well; Core collapse; Decay heat; Vent; Fire engine; Radiation heat; Blowout panel; Oxidation

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