In Japan, radiation levels in the seawater near the Fukushima plant continue to rise. They're now more than 3.5 thousand times higher than normal. Radioactive material has also been detected in soil at the facility. Japan's government described the situation as serious and unpredictable. Workers have been unsuccessfully trying to restore the plant's cooling system, in what is now the worst atomic crisis since Chernobyl. There's been some debate over whether there are any similarities between the two events. RT talks to Professor Christopher Busby, of the European Committee on Radiation Risks.