A US nuclear expert brought in to offer advice about the crippled Fukushima nuclear plant says leaks of radioactive water into the sea are not a major concern. It is believed about 300 tonnes of contaminated water is seeping into the ocean every day. Responding to criticism over its handling of leaks at Fukushima, the plant's operator TEPCO brought in expert Lake Barrett, who spent several years dealing with the Three Mile island nuclear accident in the United States. Mr Barrett has just completed his first tour of the shattered Fukushima complex. Appearing in Tokyo after inspecting the site, he...