Tuhia tētahi tohutoro mō tēnei wāhanga - I whakawhitihia a Koval mai i Oak Ridge ki tētahi taiwhanga matua-runga i Dayton, Ohio i te 27 o Hune 1945, i hangaia ai ngā pūkaha polonium. Ko te poma ngota tuatahi o te ao i pupuhi i New Mexico i te Hurae 16 o taua tau. Ko nga poma ngota i whakahekea ki Japan i te 6 me te 9 o Akuhata, i arahi ai ki te tuku a Japan
me te mutunga o te Pakanga Tuarua o te Ao. I whakautu te Soviet Union mā te whakanui i ngā mahi ki te whakawhanake i tōna ake poma ngota. Ahakoa i whakaarohia e te Central Intelligence Agency o Amerika kaore nga Soviet e angitu tae noa ki te 1950-1953, ko te poma ngota Soviet tuatahi i pupuhi i te Akuhata 29, 1949. E ai ki ngā rangatira hōia o Rūhia, ko te kaihanga o te pōro plutonium, "i whakaritea ki te 'tauākī' i whakaratohia e te kaihoko matauranga hōia a Delmar [Koval]".