@magee101 It was still heavily used as a requirement for plastics essential to military power and was secured to prevent other countries IE China and the like having access to it. As it is widely believed in fallout canon that they were not as reliant on Nuclear power sources as the U.S.
On top of that most fusion technology came about shortly before the Great War and much of it still had to extend to all corners of the country. Despite what is seen in the later fallout games in particular.
@magee101 It was still heavily used as a requirement for plastics essential to military power and was secured to prevent other countries IE China and the like having access to it. As it is widely believed in fallout canon that they were not as reliant on Nuclear power sources as the U.S.
On top of that most fusion technology came about shortly before the Great War and much of it still had to extend to all corners of the country. Despite what is seen in the later fallout games in particular.