High Quality Content by WIKIPEDIA articles! The Joint Committee on Atomic Energy (JCAE) was a United States congressional committee that was tasked with exclusive jurisdiction over "all bills, resolutions, and other matters" related to civilian and military aspects of nuclear power from 1946 through 1977. It was established by the United States Atomic Energy Act of 1946, and was the overseer of the United States Atomic Energy Commission. For its broad powers, it is described as one of the most powerful congressional committees in U.S. history. It was the only permanent joint committee in modern times to have legislative authority.