Nuclear regulators in Japan have reported that radiation levels in Japan’s Fukushima Daiichi nuclear plant are “exceedingly high” and are worse than previously thought. Japan’s Nuclear Regulation Authority (NRA) said in a report a significant amount of radioactive materials apparently were attached to shield plugs in the containment vessels in the No. 2 and No. 3 reactors, reported the Asahi Shimbun newspaper. Officials said the radiation contained in the vessels is at around 10 sieverts per hour, which is enough to kill a worker who spends an hour near the container. The report noted that decommissioning the reactor will require a worker to remove the aforementioned shield plugs, forcing NRA officials to reconsider their plans. Toyoshi Fuketa, chairman of the NRA, said removing the contaminated shield plugs will add considerable difficulties in retrieving the nuclear fuel debris, the paper reported. The plugs are made of concrete, are circular, and measure about 40 …