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Fukushima: Mark 1 Nuclear Reactor Design Caused GE Scientist To Quit In Protest
Key Excerpts from Article on Website of ABC News
Posted: March 22nd, 2011
http://abcnews.go.com/Blotter/fukushima-mark-nuclear-reactor...
Thirty-five years ago, Dale G. Bridenbaugh and two of his colleagues at General Electric resigned from their jobs after becoming increasingly convinced that the nuclear reactor design they were reviewing -- the Mark 1 -- was so flawed it could lead to a devastating accident. Five of the six reactors at the Fukushima Daiichi plant, which has been wracked since Friday's earthquake with explosions and radiation leaks, are Mark 1s. "The problems we identified in 1975 were that, in doing the design of the containment, they did not take into account the dynamic loads that could be experienced with a loss of coolant," Bridenbaugh [said]. "The impact loads the containment would receive by this very rapid release of energy could tear the containment apart and create an uncontrolled release." Questions persisted for decades about the ability of the Mark 1 to handle the immense pressures that would result if the reactor lost cooling power. In 1986, for instance, Harold Denton, then the director of NRC's Office of Nuclear Reactor Regulation, spoke critically about the design during an industry conference. Today that design is being put to the ultimate test in Japan.
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