Serbia currently operates a single nuclear research reactor in the Vinča Institute. Previously, Vinča Institute had two active reactors: RA and RB. In the 1958, nuclear incident happened. Six workers received critical amount of radiation and one of them died. These workers received first bone marrow transplant in Europe. After, Chernobyl disaster, in 1989, moratorium on use of nuclear energy was in power. Later, the law officially prohibited use of nuclear energy. To this day, Directorate for Nuclear and Radiation Safety (Srbatom) is strongly opposed to any kind of nuclear energy use in Serbia or neighbouring countries.