Marka la eego dhulgariirkii 2011 iyo tsunami ka dhashay oo ka badan 15 mitir xeebta bari ee Japan
, warshadda tamarta nukliyeerka ee Fukushima I ayaa dhaawac ka soo gaadhay saddex ka mid ah lix reactors ka dib markii nidaamyada qaboojinta gargaarka degdegga ah ay ku fashilmeen sababo la xiriira xaaladaha aadka u daran ee ka baxsan naqshadeynta aasaasiga ah. Taasi waa, warshadihii Fukushima ma aysan tixgelin tsunami kor ku xusan naqshadooda asalka ah. Warshadahaani waxay ahaayeen General Electric BWR-3 iyo BWR-4 warshadaha gudaha Mark I naqshadaha xakamaynta, taas oo caan ku ah Mareykanka. Si kastaba ha noqotee, dhamaan noocyada dhirta waxay leeyihiin naqshado kaladuwan sababo la xiriira xeerarka, doorbidyada adeegsiga shaqsiyeed, iyo goobta dhismaha. Sanadkii 1995, Sandia National Laboratories waxay ku qiyaastay in shaqsiyaadka BWR-3 iyo BWR-4 ee Mareykanka ay leeyihiin inta jeer ee dhaawaca asaasiga ah inta udhaxeysa 10−4 iyo 10−7.