Hundreds of tons of groundwater which seeped into a stricken nuclear plant in Japan has begun to be released out to sea, the plant’s operators say. Tokyo Electric Power Co, which operates the Fukushima Daiichi Nuclear Power Station, said the water’s radiation level met safety guidelines, but it was not clear whether the water was more radioactive than normal groundwater. The operator said it would discharge a total of 560 tonnes of the water, which enters the basement of the reactor buildings daily, into the Pacific Ocean. The operator has been battling with a massive amount of radiation-tainted water as it continues to inject water into three of its six reactors to keep them cool. More