Now let me go over boiling water reactors and then we'll do pressurised water reactors.

现在，我们回顾一下沸水式反应堆，我们会做一个压水式反应堆。

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The estimates were gathered by Richard Lahey, the former chief of safety research for boiling water reactors at General Electric, which installed the reactors at the Japanese power plant.

这些数据由Richard Lahey进行估算，他是GE冷凝水反应器的首席安全研究员，GE安装了日本电厂的这些装置。

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Richard T. Lahey Jr., G.E.’s former head of safety research for the type of boiling-water reactors installed at Daiichi, said restoring the emergency cooling pumps was crucial.

Richard T. Lahey Jr是通用电力安全调研部前任部长，负责福岛第一核电站的沸水反应器。 他认为重建应急冷却泵十分关键。

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Seven boiling water reactors at the Fukushima Daiichi plant and the neighbouring Fukushima Daini plant, both operated by Tokyo Electric Power (Tepco), shut down on Friday.

BBC: Japan quake: Nuclear closures to cause power shortages

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.

BBC: Will Japanese crisis curb the rise of nuclear power?

Mr Ishizuka acknowledges that the company is taking a risk, though given that Hitachi knows how to build advanced boiling water reactors and that it now owns the land on which to build them, he is firmly optimistic.

BBC: Hitachi's nuclear deal still faces hurdles