TOKYO—The operator of the tsunami-wrecked Fukushima nuclear power plant said Wednesday that a data simulation of its planned release of treated radioactive water into the sea suggests it would have an extremely small impact on the environment, marine life, and humans.
The Japanese government and the plant’s operator, Tokyo Electric Power Company Holdings, say they will start gradually releasing the water in the spring of 2023 so hundreds of storage tanks at the plant can be removed to make room for facilities needed for its decommissioning.