That's due to the heat that remains in the nuclear core, both from the recently-disabled but still-hot fuel rods and from the various byproducts of the fission process.
燃料棒虽然停止工作，但仍然非常炙热，而且裂变反应生成的多种副产物也会产生很多热量，这些热量一直维持在反应堆的核心。
Nuclear fission produces insane amounts of energy — we're talking several million times more energy than you'd get from a similar mass of a more everyday fuel like gasoline.
核裂变产生的能量极其巨大——相比同等质量的普通燃料如汽油等，核裂变材料释放出的能量要多出几百万倍。
The uranium fuel generates heat by neutron-induced nuclear fission.
铀燃料是由中子导致的核裂变产生的能量加热的。
Uranium 235 — the fuel inside a nuclear reactor — undergoes nuclear fission.
铀235——反应堆中的燃料——经过核裂变。
Plutonium is produced during nuclear fission, so is present in all reactor cores - the longer the fuel has been there, the more plutonium will be present, up to about 1%.
钚是在核裂变过程中产生的，所以在所有的反应堆中都存在---燃料在反应堆内烧的时间越长，产生的钚就越多，最高可以到1%。
The uranium fuel generates heat by nuclear fission.
铀燃料通过核裂变产生热量。
Nukes made 20 percent. in addition, nuclear fission differs from the burning of fossil fuel in that it produces neither sulfur dioxide nor nitrogen oxides, the pollutants that cause acid rain.
核能源仅提供了20%此外，核分裂和燃烧矿物燃料还有一个重要区别：核分裂不会制造能导致酸雨的两种污染物质，二氧化硫和一氧化氮。
The energy comes from nuclear power reactors in the fissile material (nuclear fuel) for the release of fission fission energy.
核能发电的能量来自核反应堆中可裂变材料(核燃料)进行裂变反应所释放的裂变能。
Nuclear fuel "means any material which is capable of producing energy by a self-sustaining process of nuclear fission and which is used or intended for use in a nuclear ship."
“核燃料”，是指能够通过自身的核裂变过程产生能量，并且被用于或意图用于核动力船舶的任何物质。
Nuclear fuel "means any material which is capable of producing energy by a self-sustaining process of nuclear fission and which is used or intended for use in a nuclear ship."
“核燃料”，是指能够通过自身的核裂变过程产生能量，并且被用于或意图用于核动力船舶的任何物质。
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