核反应堆发电量仅为全球总发电量的14%，而其年龄中位数为27年（见图表），设计寿命一般为40年，许多反应堆正临近退役。

Nuclear reactors generate only 14% of the world's electricity, and with a median age of about 27 years (see chart) and a typical design life of 40 a lot are nearing retirement.

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在美国，如果反应堆因补充燃料而关闭，一般来说，在厚重的钢质反应堆压力容器内仍会存有大多数燃料，因为这个容器可提供更多保护，防止辐射泄漏。

In the U. S., reactors shut down for refueling typically retain most of their fuel in the thick steel reactor pressure vessel that provides much more protection against a radioactive release.

youdao

在美国，如果反应堆因补充燃料而关闭，一般来说，在厚重的钢质反应堆压力容器内仍会存有大多数燃料，因为这个容器可提供更多保护，防止辐射泄漏。

In the U. S., reactors shut down for refueling typically retain most of their fuel in the thick steel reactor pressure vessel that provides much more protection against a radioactive release.

youdao