Japanese authorities on Wednesday approved for the first time an extension to the 40-year operating life of one of the nuclear power plants affected by the 2011 earthquake and tsunami disaster.Japan's nuclear watchdog allowed an extension of up to 20 years beyond the Nov. 28 limit for Japan Atomic Power Co.'s Tokai No. 2 plant in Ibaraki Prefecture, northeast of Tokyo. The plant uses the same boiling water reactor as the crisis-hit Fukushima Daiichi power plant.The move, together with previous extensions of the operating limit at three other aging nuclear reactors, could undermine the 40-ye…READ FULL ARTICLE