A Russian expert on the 1986 Chernobyl disaster has told a symposium in Aomori Prefecture that it is imperative to cleanse food of radioactive substances emitted by the Fukushima No. 1 power plant.

Mikhail Balanov, a professor at the St. Petersburg Research Institute of Radiation Hygiene, proposed during the symposium Friday at Hirosaki University in the city of Hirosaki that Japanese farmers use the Prussian blue pigment to remove cesium from livestock and apply fertilizer designed to prevent the transmission of radioactive materials from soil to plants, methods used during the Chernobyl crisis.

The area affected by the crisis at the Fukushima No. 1 power station is smaller than that contaminated by the Chernobyl plant, and no acute health effects linked to radiation have been confirmed yet in the Fukushima crisis, he said.