New “passive safety” features can shut a reactor down in an emergency without the need for human intervention.

新的“主动性安全设施”的功能在紧急情况下，无须人工干预就可以关闭反应堆。

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One of the key factors in this scenario is determining how the reactor will be shut down because you must shutdown the reactor.

这个方案的一个重要因素就是，它决定了反应堆是如何停止的，因为你们必须停止反应堆。

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Once the reactor has shut down, there remains "decay heat" from traces of other radioactive isotopes.

一旦反应堆关闭，它仍热存在有来自其他放射性同位素踪迹的衰变热。

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North Korea has shut-down and partly dismantled its nuclear reactor complex under terms of the accord.

VOA: standard.2009.03.25

This should also be an opportunity for Westinghouse, which has designed the third-generation AP1000 reactor to shut down safely even in the event of complete loss of electric power.

FORBES: Reports Claim Meltdown At Japanese Reactor

There was no operator error involved at Fukushima-Daiichi, and each reactor was successfully shut down within moments of detecting the quake.

FORBES: Explainer: What Caused The Incident At Fukushima-Daiichi

Russia also said it would shut down its last plutonium-producing reactor.

ECONOMIST: Disarmament and counter-proliferation