The cost of recycling spent nuclear fuel has surged since Japan started using such fuel in 1999, Kyodo News learned Saturday, adding to questions about the economics of nuclear fuel reprocessing.Japan already is struggling with the sustainability of nuclear power generation using recycled fuel called mixed oxide, or MOX, which has resulted in a stockpile of nearly 50 tons of plutonium, with only a few reactors currently using such fuel.The MOX fuel is produced by reprocessing spent nuclear fuel and reusing extracted plutonium and uranium. Japanese power companies send their spent fuel to Fr…READ FULL ARTICLE