OKG AB is a Swedish corporation who owns and operates the Oskarshamn Nuclear Power Plant. It is part of the E. ON group. The three reactors Oskarshamn 1-3 was manufactured by ASEA Atom and was put into operation in 1972 1974 and 1985 respectively. At the reactor site some 30 km north of Oskarshamn OKG also operates CLAB – Sweden's central interim storage facility for radioactive waste.