In January 1943, Grafton's successor, Major Arthur V. Peterson, ordered Chicago Pile-1 dismantled and reassembled at Red Gate Woods, as he regarded the operation of a reactor as too hazardous for a densely populated area.
I januar 1943 gav Graftons efterfølger, major Arthur V. Peterson, ordre til at Chicago Pile-1 skulle pilles ned og genopstilles i Argonne, da han anså det for for farligt at drive en reaktor i et tætbefolket område.