从铀矿石中提取铀直到制成核纯（见放射性核素纯度）铀化合物的工艺过程，是天然铀生产的重要步骤。
铀燃料是由中子导致的核裂变产生的能量加热的。
The uranium fuel generates heat by neutron-induced nuclear fission.
向装有过热铀燃料棒的储存池里撒水效率不高，上升的蒸汽驱散了大量水分。
Spraying water on storage pools full of overheating spent uranium fuel rods is not very effective because rising steam dissipates much of the incoming water.
海水是作为普通水的替代品而引入的，普通水是反应堆核心铀燃料棒的冷却剂。
The sea water appears to have been brought in as a substitute for the regular water used as coolant for the uranium fuel rods at the heart of the reactor.
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