Experimental Breeder Reactor I was created in 1950.

A breeder reactor is one type of nuclear reactor, but not a type that is in general commercial use at the present time

The person who invented the Breeder Reactor in the 1950s was by a team led by Walter Zinn

A breeder reactor is generally defined as a power generating reactor that breeds at least sufficient plutonium to replace the U235/Pu which it has consumed. To the best of my knowledge, North Korea does not have such a reactor.

A breeder reactor