The nuclear power reactor of Unit No. 2 at the Fukushima I (Daiichi) power plant, is a General Electric Boiling Water Reactor (BWR) completed during 1974.
The containment designs are referred to by the names Mark I (oldest; drywell/torus), Mark II, and Mark III (newest).
The No. 2 reactor at Fukushima Daiichi is a Mark I.
The No. 2 reactor at Fukushima Daiichi uses MOX fuel (the kind with extra Plutonium).
The No. 2 reactor at Fukushima Daiichi currently has a ‘stuck’ vent valve.
The No. 2 reactor at Fukushima Daiichi is currently suffering a meltdown.
In 1986, Harold Denton, then the NRC’s top safety official, told an industry trade group that the “Mark I containment, especially being smaller with lower design pressure, in spite of the
suppression pool, if you look at the WASH 1400 safety study, you’ll find something like a 90% probability of that containment failing.”
The GE Mark I reactor design is called a “pressure suppression” design. Rather than be built to withstand large pressure increases, General Electric sought with this design to attempt to reduce such increases in an accident scenario. The design has been criticized by independent nuclear experts and even Nuclear Regulatory Commission staff for many years.
In a General Electric Mark I reactor, the containment building is fairly weak and is considered the secondary containment. The primary containment is a steel liner that surrounds the
reactor core.
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The containment designs are referred to by the names Mark I (oldest; drywell/torus), Mark II, and Mark III (newest).
The No. 2 reactor at Fukushima Daiichi is a Mark I.
The No. 2 reactor at Fukushima Daiichi uses MOX fuel (the kind with extra Plutonium).
The No. 2 reactor at Fukushima Daiichi currently has a ‘stuck’ vent valve.
The No. 2 reactor at Fukushima Daiichi is currently suffering a meltdown.
In 1986, Harold Denton, then the NRC’s top safety official, told an industry trade group that the “Mark I containment, especially being smaller with lower design pressure, in spite of the
suppression pool, if you look at the WASH 1400 safety study, you’ll find something like a 90% probability of that containment failing.”
The GE Mark I reactor design is called a “pressure suppression” design. Rather than be built to withstand large pressure increases, General Electric sought with this design to attempt to reduce such increases in an accident scenario. The design has been criticized by independent nuclear experts and even Nuclear Regulatory Commission staff for many years.
In a General Electric Mark I reactor, the containment building is fairly weak and is considered the secondary containment. The primary containment is a steel liner that surrounds the
reactor core.
If you enjoyed this, or topics of preparedness or current events risk awareness, consider our survival blog RSS feed, new posts by E-mail, or bookmark us at Modern Survival Blog
Modern Survival Blog related posts
West Coast USA Danger IF Japan Nuclear Reactor Meltdown
Posted on Mon, 14 Mar 2011 18:42:20 +0000 at http://feedproxy.google.com/~r/ModernSurvivalBlog/~3/9L0j4Gppm0U/
Comments: http://modernsurvivalblog.com/nuclear/fukushima-reactor-no-2-the-most-vulnerable-design/#comments