Is this true?? I've always heard that Pu from spent fuel was a major major concern!
"The high spontaneous fission rate of 240Pu acts as a kind of poison in the core of nuclear bombs. More than about 7% 240Pu and the likelihood that the warhead won’t work increases, and the dangers of handling the more radioactive 240Pu become too great.
The 7% limit is reached in a typical nuclear reactor after about 90 days (depends on the reactor design and the 235U enrichment). Typical commercial power reactor fuel cycles are around two years. If the fuel cycle is shorter the electricity becomes uneconomic.
All this means that the plutonium than can be extracted from the fuel rods of a commercial nuclear power reactor is not suitable for making nuclear weapons."
http://theconversation.com/debunking...ng-bombs-20013
"The high spontaneous fission rate of 240Pu acts as a kind of poison in the core of nuclear bombs. More than about 7% 240Pu and the likelihood that the warhead won’t work increases, and the dangers of handling the more radioactive 240Pu become too great.
The 7% limit is reached in a typical nuclear reactor after about 90 days (depends on the reactor design and the 235U enrichment). Typical commercial power reactor fuel cycles are around two years. If the fuel cycle is shorter the electricity becomes uneconomic.
All this means that the plutonium than can be extracted from the fuel rods of a commercial nuclear power reactor is not suitable for making nuclear weapons."
http://theconversation.com/debunking...ng-bombs-20013
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