Construction of the world's first commercial reactor to operate solely on plutonium-uranium mixed oxide fuel in northeastern Japan will be pushed back for the third time due to prolonged safety checks, its constructor said Tuesday.Electric Power Development Co. had been planning to begin construction of major facilities at the Oma nuclear power plant in Aomori Prefecture in the latter half of this year, but told a local assembly it has decided to delay it by about two years. The delay means the reactor will start operation in fiscal 2026.The move clouds the course of Japan's nuclear fuel cy…READ FULL ARTICLE