Mezue ahịrịokwu na-esonụ: Nnukwu mmiri ozuzo sitere n'oké ifufe ahụ mere ka mgbasa nke ihe ndị na-emepụta redioaktivu na mmiri dị n'okpuru ala dị gburugburu ụlọ ọrụ ike nuklia Fukushima I na Fukushima II, bụ ndị tara ahụhụ na 2011 mgbe a gbasasịrị ihe ọkụkụ nuklia
Ala ọma jijiji nke ike ya ruru 9.0 MW na oké ebili mmiri sochiri ya. Ọ̀tụ̀tụ̀ nke hydrogen isotope tritium bụ́ nke na-agbasa agbasa ji okpukpu iri rịa elu karịa ọnwa gara aga ruo 150,000 becquerel kwa lita. Strontium-90, ihe a maara na ọ na-akpata ọrịa cancer ọkpụkpụ, rịrị elu ruo n'ọ̀tụ̀tụ̀ kasị elu nke 1.2 nde becquerel kwa lita. Ebe ọzọ a na-ewe ihe nlele gosiri na ọnụọgụ nke ihe na-ewepụta ihe ndị na-emepụta beta ji okpukpu abụọ karịa nke e nwere tupu ajọ ifufe ahụ.