“If anything, the military purpose of Chernobyl-2 is a reminder that the purpose of the Chernobyl power station was never entirely civilian, either. While it did provide vast amounts of electricity to Ukraine, its four reactors were of the RBMK variety, meaning they could be easily switched between the fission of uranium for civilian purposes and the enrichment of plutonium for military ones. That left the top of reactor lightly covered, in order to make the switching of fuel assemblies easier. That’s why, when the thing unleashed its fiery belch one April day, a good part of Europe got a dusting of radionuclides.” (Newsweek)