Revelations that radioactive water from the crippled Fukushima nuclear plant in Japan may have leaked into the Pacific Ocean have raised questions about what danger that actually poses to the wider environment.
Around 300 tonnes of radioactive water is suspected to have seeped from a tank used to cool the broken reactors, with plant operator Tokyo Electric Power warning some of it may have flowed into the ocean.
Oceanographer with the University of New South Wales Erik van Sebille has participated in a study of 2011 Fukushima incident.
He's told Murray Silby the study considered what path a plume of radioactive water contaminated in the incident is taking across the Pacific.
