Those looking for something to do this weekend may be interested in taking a closer look at some of Idaho National Laboratory’s early historic nuclear energy activities by visiting the Experimental Breeder Reactor-1 museum west of Idaho Falls. Free summer tours of the recently expanded EBR-1 museum begin tomorrow. EBR-1 was completed in 1951 and produced the world’s first usable amount of electricity from nuclear power on December 20th, 1951. The reactor was operated until late 1963, decommissioned in1964 and was dedicated as a Registered National Historic Landmark two years later. EBR-1, just off U.S. Highway 20, is open from 9:00 am to 5:00 pm seven days a week through the Labor Day. Visitors can either tour the unique facility on their own or take a guided tour.