. . "Chicago Pile" . "first atomic pile" . . "66000314" . "first nuclear reactor" . . "Chicago Pile-1#Later operation" . "world's first nuclear reactor" . . "Chicago Pile One (CP-1)" . "Chicago Pile-1" . "first artificial self-sustaining nuclear chain reaction" . . . . . "first self-sustaining nuclear reaction" . "Chicago Pile-1, the world's first nuclear reactor" . . . "Chicago Pile-2" . . "nuclear reaction" . "the first nuclear reactor" . . . "University of Chicago" . "nuclear power" . . "the first self-sustaining nuclear chain reaction" . . "Chicago Pile team member" . . "CP-1" . . "1942" . "Site of First Self-Sustaining Nuclear Chain Reaction" . "the world's first nuclear reactor" . "first artificial nuclear chain reaction" . "Chicago Pile-1" . "site of the first self-sustaining nuclear reaction" . "the location" . "CP-1/CP-2" .