Rịba ama amaokwu a dị n'okpuru ma zaa ajụjụ ahụ mgbe e mesịrị n'otu asụsụ ahụ dị ka amaokwu ahụ:  Ụzọ: Òtù mbụ mepụtara ikike nuklia bụ ndị agha mmiri nke United States, nke nwere ihe ọkụkụ S1W maka nzube nke ịkwalite ụgbọ mmiri na ụgbọelu. Ụgbọ mmiri mbụ e ji ụgbọ mmiri nuklia arụ ọrụ, bụ́ USS Nautilus, malitere ije ozi n'oké osimiri na January 1954. Onye na-ahụ maka imepụta ihe ọkụkụ nke ndị nkịtị bụ Admiral Hyman G. Rickover, onye ya na Weinberg dị ka onye ndụmọdụ ya, họọrọ PWR / Pressurized Water Reactor, n'ụdị nke 10 MW maka Nautilus, mkpebi nke ga-eme ka PWR nweta nkwa gọọmentị iji zụlite, nduzi injinia nke ga-ebute mmetụta na-adịgide adịgide na ahịa eletrik nkịtị n'afọ ndị na-abịanụ. United States Navy Nuclear Propulsion design and operation community, n'okpuru Rickover's style of attentive management retains a continuous record of zero reactor accidents (defined as the uncontrolled release of fission products to the environment resulting from damage to a reactor core). na US Navy ụgbọ mmiri nke ụgbọ mmiri nuklia, na-eguzo na ihe dị ka ụgbọ mmiri 80 dị ka nke 2018.Na June 27, 1954, Obninsk Nuclear Power Plant nke USSR, dabere na ihe ga-aghọ ihe ga-abụ ihe nlereanya nke RBMK reactor design, ghọrọ ụlọ ọrụ ike nuklia mbụ nke ụwa iji mepụta ọkụ eletrik maka ike eletrik, na-emepụta ihe dị ka 5 megawatts nke ike eletrik.Na July 17, 1955 BORAX III reactor, ihe nlereanya nke Reactors Water Reactors, ghọrọ onye mbụ na-emepụta ọkụ eletrik maka obodo dum, obodo Arco, Idaho. E gosipụtara ihe nkiri ihe nkiri nke ngosipụta ahụ, nke na-enye ihe dị ka 2 megawatts (MW) nke ọkụ eletrik, na United Nations, Ebe na "Nzukọ Geneva nke Mbụ", nnukwu nzukọ ụwa nke ndị ọkà mmụta sayensị na ndị injinia, zutere iji nyochaa teknụzụ ahụ n'afọ ahụ. N'afọ 1957, e guzobere EURATOM n'akụkụ Njikọ Akụ̀ na Ụba nke Europe (nke a na - akpọzi European Union). N'otu afọ ahụ kwa, e guzobere Ụlọ Ọrụ Na-ahụ Maka Ike Atọm n'Ụwa Nile (International Atomic Energy Agency).  Ajụjụ: Gịnị bụ aha mbụ nke European Union?
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