The operator of the tsunami-wrecked Fukushima Daiichi nuclear power plant will begin releasing the first batch of treated and diluted radioactive wastewater into the Pacific Ocean later Thursday, utility executives said. Tokyo Electric Power Company Holdings executive Junichi Matsumoto, who is in charge of the project, said its final preparations and testing have cleared safety standards and the release will begin in the early afternoon. The release will begin more than 12 years after the meltdowns of three reactors at the plant that was heavily damaged by the massive earthquake and tsunami that struck Japan's northeastern coast on March 11, 2011.