This is also relevant because the need for Atomic Energy Intelligence was a major factor in the formation of the CIA. This is mentioned in e.g. https://foia.state.gov/DOCUMENTS/cia/3f0c.PDF#page=6

"The Atomic Energy Commission is in a unique position in that it is perhaps the only permanent agency of the Government which has operational intelligence responsibilities comparable to that of the State, War, or Navy Departments. It is difficult at times to distinguish operational intelligence from actual operations and it is found that the Commission, without recognizing it as such, -----------------------------------------------------------------------"