Tokyo Electric Power Co. will postpone the launch of plutonium-uranium mixed oxide (MOX) fuel at its nuclear plant in Fukushima Prefecture because of opposition from the governor, company sources said Thursday.

In April, the Fukushima No. 1 nuclear power plant was scheduled to become the first nuclear plant to use MOX fuel. However, Fukushima Gov. Eisaku Sato said last month that the prefecture will not allow MOX to be used because residents are against it.

MOX, a pellet mixture of uranium dioxide and plutonium dioxide, is designed to be burned in light-water reactors, a process known as plutonium thermal use.