While that was one reason for the formation of the Department of Energy, the other big reason was to have one Department handle all aspects of the nation's nuclear program (from reactors to bombs to disposal of waste). In essence, have a "one-stop shop" where anyone that needed a nuclear expert could go.
That's why they handled the development and production of our nuclear weapons and currently handle their maintenance. (and would design and build more if we were doing that)
And, I think, they are also responsible for helping develop nuclear power plants. Or at least, having their nuclear scientists set the safety standards.
Two things come to mind:
1) We don’t buy nuke material anymore since FERC won’t approve new permits. U.S sits on one of largest uranium reserves. DOE isn’t needed for that. We should allow fuel rods to be reprocessed, like France.
2) If the government needs to be responsible for the safety of nuclear power plants,
A) I don't see why we need a huge $30 billion department for that
B) Why can't the function be transferred to the Defense Department?
Thinks about it ... prior to Jimmy Carter, we had WWII nukes, nuclear power plants, SS Savannah, USS Nautilus, USS Enterprise and the rest .... Can someone really tell me that the the US Navy simply could not have existed prior to the formation of DOE?