Secondly, and most importantly, NONE of these incidents were caused by a nuclear explosion per se.
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India used just such technologies and materials for its first nuclear explosion in 1974.
But in 1963 the Limited Test Ban Treaty prohibited any nuclear explosion that sent radioactivity over a nation's borders.
Imprecise and badly drafted, the treaty leaves critical terms like "nuclear explosion" undefined.
That reactor type is not ideal for producing weapons-grade plutonium, but all reactors produce plutonium that could be used in a nuclear explosion.
It can guide a drone to the site of a nuclear explosion by following the plume of gamma radiation where no onboard pilot could safely venture.
Shatter cones are surface features with distinctive wavy patterns that are known to be created only by the tremendous force of a meteorite impact or an underground nuclear explosion.
When excitement was hard to come by aboard a nuclear submarine in the early stretches of "Crimson Tide, " he turned a fat fire on a stove in the sub's galley into something just short of a nuclear explosion.
That may seem like only a short time ago, but an incoming technological explosion of nuclear proportions isn't so far-fetched when you consider everything that's changed just between then and now.
Furthermore, it would take a combination of extreme events to make things dangerous in Tokyo (nuclear re-criticality, steam explosion) etc all of which are being rendered less and less likely as time passes and the heat decay process progresses.
And the bottom line is that once we got past the news of a third explosion at the Japanese nuclear facility in Fukushima and word that radiation levels were rising, the news was actually pretty good for the remainder of the day.
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At 6:14 a.m.(4:14p.m EST) another explosion occurred at the Fukushima nuclear power plant.
At the Fukushima nuclear power plants, fears of another explosion remain high.
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The government announced that the explosion at an earthquake-damaged nuclear plant is not causing radiation to leak, as had been widely feared and suspected.
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"The Japanese government is saying that the containment's OK, but that belies belief when you see the violence of the explosion, " said John Large, a nuclear consultant, referring to the current troubles at the plant.
Concerns are growing about radiation leaks at a nuclear plant in Japan that has been hit by a third explosion in four days following last week's earthquake and resulting tsunami.
An explosion in the middle of the night at the Chernobyl nuclear power plant in Ukraine tore off the plant's roof and sent radiation over much of Europe.
Since 2003, when Iran's nuclear program was first disclosed, the greater Middle East has seen an explosion of interest in the atom.
Nuclear plant operators are battling to prevent meltdowns at three reactors, and Chief Cabinet Secretary Yukio Edano warned Sunday that a hydrogen explosion could occur at Unit 3 of the Fukushima No.1 nuclear power station.
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Think of nuclear fission: it generates useful energy but if it runs out of control you get a cataclysmic explosion.
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