New types of reactors were designed, including the Fast Breeder reactor powered by plutonium and cooled by liquid sodium.

新型的反应堆被设计出来，包括由钚提供能量，液态钠参与冷却的快中子增殖反应堆。

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The Soviet RORSAT radar satellites were powered by a NaK-cooled reactor. Apart from the wide liquid temperature range, NaK has a very low vapor pressure, important in the vacuum of space.

相当大的温度范围内仍然是液态，此外，钾钠合金蒸气压非常低，这一点在真空条件下显得尤为重要。

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There are a number of different reactors in use, most commonly water-cooled pressurised or boiling water reactors - though other reactor types are kept cool with the help of liquid metal, gas or molten salt.

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