It has developed small reactors to power spacecraft, a technology in which America is years behind.

They're working on small reactors now, but there aren't enough of them to power the entire city.

Such efficiency means a small reactor can pack a big punch.

At least 100 older and smaller reactors will "most probably be closed over the next 10-15 years".

This week it started up a small reactor in Yongbyon.

The first two had small reactors operating until 1982 and 1987.

However, three small nuclear reactors for scientific purposes have been built and used since the 1960s, with one still being in operation.

Even a small, 20-to-40-megawatt reactor would be large enough to fuel a few nuclear weapons a year.

The lab also has a second, far smaller reactor, for medical research.

Since this is the case, we should think about promoting small and medium-sized nuclear reactors.