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The 1.18 million-kW No. 3 reactor at Kyushu Electric Power Co.'s Genkai nuclear power plant in Saga Prefecture, which is Japan's first reactor using plutonium-uranium mixed oxide (MOX) as fuel, attained nuclear criticality last Thursday and started trial operations Monday (commerical operations are to start on Dec. 2). Thus "pluthermal" power generation has begun, but many problems remain unresolved. MOX fuel, made of plutonium extracted from spent nuclear fuel and uranium, was primarily intended for use in a fast breeder reactor (FBR), the core of Japan's nuclear fuel-cycle plan. But the prototype FBR Monju in Tsuruga, Fukui Prefecture, has remained shuttered since a major accident in 1995. As a secondary step, the government in 1997 decided to adopt pluthermal power generation, which burns MOX fuel in ordinary light water reactors. But mishaps delayed its start by 10 years.

The 1.18 million-kW No. 3 reactor at Kyushu Electric Power Co.'s Genkai nuclear power plant in Saga Prefecture, which is Japan's first reactor using plutonium-uranium mixed oxide (MOX) as fuel, attained nuclear criticality last Thursday and started trial operations Monday (commerical operations are to start on Dec. 2). Thus "pluthermal" power generation has begun, but many problems remain unresolved. MOX fuel, made of plutonium extracted from spent nuclear fuel and uranium, was primarily intended for use in a fast breeder reactor (FBR), the core of Japan's nuclear fuel-cycle plan. But the prototype FBR Monju in Tsuruga, Fukui Prefecture, has remained shuttered since a major accident in 1995. As a secondary step, the government in 1997 decided to adopt pluthermal power generation, which burns MOX fuel in ordinary light water reactors. But mishaps delayed its start by 10 years.

"A nuclear reactor in Ehime Prefecture moved a step closer early Tuesday to starting Japan's second ''pluthermal'' power generation operation with the use of plutonium-uranium mixed oxide fuel, launching a self-sustaining nuclear chain reaction, its operator said."

"Genkai nuclear plant operator Kyushu Electric Power Co. promised in 2009 to repay debts incurred by local fisheries cooperatives totaling 700 million yen, it was revealed on Sept. 7. The Saga Prefecture Genkai Federation of Fisheries Cooperatives, an association of over 13 local fisheries unions based in the city of Karatsu, Saga Prefecture, obtained a promise from Kyushu Electric for the power company to repay 700 million yen in debt incurred by the federation and its members in 2009 -- the same year the utility started its "pluthermal" (plutonium-thermal) reactor project at the local Genkai Nuclear Power Plant. The utility is thought to have agreed to pay the debt in return for the federation supporting the pluthermal project."

Critics of Weapons-Grade "MOX" Fuel Say It's Too Volatile and Generates High Amounts of Radioactive Waste (AP) Japan used weapons-grade plutonium to fuel a nuclear power plant Thursday for the first time as part of efforts to boost its atomic energy program. Kyushu Electric Power Co. said workers fired up the No. 3 reactor at its Genkai plant in the southern prefecture of Saga using MOX fuel - a mixture of plutonium oxide and uranium oxide. The reactor is scheduled to start generating electricity Monday for a monthlong test run, and then begin full-fledged operations after a final government inspection and approval in early December, company official Futoshi Kai said. The Genkai plant marks the beginning of Japan's use of MOX fuel for so-called "pluthermal" power generation, approved by the Cabinet more than a decade ago.

Critics of Weapons-Grade "MOX" Fuel Say It's Too Volatile and Generates High Amounts of Radioactive Waste (AP) Japan used weapons-grade plutonium to fuel a nuclear power plant Thursday for the first time as part of efforts to boost its atomic energy program. Kyushu Electric Power Co. said workers fired up the No. 3 reactor at its Genkai plant in the southern prefecture of Saga using MOX fuel - a mixture of plutonium oxide and uranium oxide. The reactor is scheduled to start generating electricity Monday for a monthlong test run, and then begin full-fledged operations after a final government inspection and approval in early December, company official Futoshi Kai said. The Genkai plant marks the beginning of Japan's use of MOX fuel for so-called "pluthermal" power generation, approved by the Cabinet more than a decade ago.