A location has already been found and selected, but the Democratic Party has single-handedly blocked it for decades to win Nevada votes through a cycle of misinformation whereby they have convinced votes that Las Vegas will somehow be at risk if the approved repository, Yucca Mountain, is used.
It's an indictment of double think that the party which believes we will all die from climate change (rightly) is also the party that has made sure the one power source we have that could have saved us in the last 70 years wasn't used.