Workers briefly entered a reactor building at Japan's stricken Fukushima nuclear power plant Wednesday to measure radiation levels and check for damage, the operator said. The investigation was part of work by Tokyo Electric Power Co. (TEPCO) to bring reactors at the complex to a stable cold shutdown by January at the latest. Four employees in protective suits and with oxygen tanks on their backs entered the building housing reactor two and left 14 minutes later, TEPCO said. It was the first time anyone had gone in the reactor two building since an explosion on March 15. A pair of remote-controlled robots entered in April but high humidity clouded their lenses and prevented them from measuring radiation.






