Mezue ahịrịokwu na-esonụ:
Mgbe ala ọma jijiji nke 2011 na mbute mbute nke 15 + mita na ụsọ oké osimiri ọwụwa anyanwụ nke Japan, ụlọ ọrụ ike nuklia Fukushima I merụrụ isi na atọ n'ime ụlọ ọrụ isii ya mgbe sistemụ jụrụ oyi nke mberede dara n'ihi oke karịa ọnọdụ ntọala. Nke ahụ bụ, ụlọ ọrụ Fukushima echeghị maka tsunami dị n'elu na nhazi mbụ ha. Ihe ndị a bụ General Electric BWR-3 na BWR-4 reactors n'ime Mark I containment designs, nke a na-ahụkarị na United States. Otú ọ dị, ụdị osisi ndị a nile nwere atụmatụ dịgasị iche iche n'ihi iwu, mmasị onye ọ bụla, na ebe a na-ewu ya. N'afọ 1995, Sandia National Laboratories mere atụmatụ na otu BWR-3 na BWR-4 reactors na United States nwere isi mmebi ugboro n'etiti 10−4 na 10−7.