Aerial view of SM-1 nuclear reactor and plant circa

Aerial view of SM-1 nuclear reactor and plant circa the 1960s. SM-1 was the first nuclear power plant to successfully provide power to the commercial grid when it came online in April 1957. While SM-1’s reactor was initially deactivated in 1973, the U.S. Army Corps of Engineers is in the process of planning for the reactor’s decommissioning and dismantlement of the facility.