Atomic energy commission successor

Answer 1

I presume you mean the US Atomic Energy Commission? This was broken into two parts: the promotional aspects to be handled by the Department of Energy, and the regulatory aspects by the National Regulatory Commission (see www.nrc.gov)

Answer 2

The United States Atomic Energy Commission was succeeded by the Nuclear Regulatory Commission (NRC) and the Department of Energy (DOE). The NRC is responsible for regulating civilian use of nuclear materials, while the DOE is responsible for overseeing the nation's nuclear weapons program and promoting energy security.