June 25 First open house is held June 25-26. About 2,600 people tour the site. September 30 EBR-II achieves its first criticality. November 27 EBR-I becomes the world's first reactor to produce electricity with a plutonium core. December 30 EBR-I is officially shut down.
V is placed on standby status.
September 13 EBR-II and its associated Fuel Cycle Facility are dedicated. August 26 President Lyndon Baines Johnson visits EBR-I for ceremonies designating it a Registered National Historic Landmark. November 1 Robert B. Duffield becomes the fourth Argonne Director. The ZPPR is dedicated.