This time the product is a new kind of nuclear reactor, something that could operate for 40 to 60 years without refueling.
这次的产品是一种新核反应堆，它可以持续运转40到60年而不用添加燃料。
2
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.