Chernobyl disaster substantial levels of caesium, which were believed to have been passed onto them during their consumption by wild boars, a significant number of which already contained radioactive particles above the allowed level. Like many other releases of radioactivity into the environment, the Chernobyl release was controlled by the physical and chemical properties of the radioactive elements in the core. Particularly dangerous are the highly radioactive fission products, those with high nuclear decay rates that accumulate in the food chain, such as some of the isotopes of iodine, caesium and strontium. Iodine-131 and caesium-137 are responsible for most of the radiation
Radiation effects from the Fukushima Daiichi nuclear disaster Even into July radioactive beef was found on sale in eleven prefectures, as far away as Kōchi and Hokkaido. Authorities explained that until that point testing had been performed on the skin and exterior of livestock. Animal feed and meat cuts had not been checked for radioactivity previously. Hay and straw were found contaminated with caesium from the reactors and outside the evacuation zone. The news of the contamination of foods with radioactive substances leaking from the Fukushima nuclear reactors damaged the mutual trust between local food producers, including farmers, and consumers. The source of caesium was found to be