Reactor RBMK fabrication technology the countries of the former Eastern Bloc. An important feature of this reactor., the capability of refueling them on-line (online refueling). Of them for the production of plutonium can also be used. Reactors of the Chernobyl accident of this type.

in 2004, the 16 reactors of this type, 2 in Ukraine, and remained in Russia were located.