沃尔德说，当一开始设计核电厂时，监管机构预计，乏燃料棒应该存放在冷却水池里，五年以后捞出来，再经过化学处理而转化为钸。
When nuclear plants were designed, says Wald, regulators anticipated that spent fuel rods would sit in cooling water pools for five years and then be chemically processed and turned into plutonium.
含有特别具有毒性的钸成分的混合氧化物燃料棒部分曝露。
Mixed oxide (MOX) fuel rods, partly composed of especially toxic plutonium are partially exposed.
最后，封闭式燃料循环中的再制作过程会产生钸，而钸可能会被用于核子武器。
Finally, the reprocessing that occurs in a closed fuel cycle produces plutonium that can be diverted for use in nuclear weapons.
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