I'm glad we're starting to take these energy sources seriously. I just hope we don't abandon Nuclear as the base-line relatively clean fuel to power us until we're done with oil.
I would _like_ to say because it's still dangerous, and you also have to commit to managing the waste for thousands of years, which is costly and dangerous, but that consideration is probably not paramount in US politicians' minds.
Serial production stopped in the 1980s. The US lost the economies of scale of it's nuclear industry, so plants built after that experienced higher costs. That, plus misinformation about the safety and environmental impact of nuclear power.
US could be a powerhouse in renewables. Tap into the geothermal from Yellowstone also and we might be seeing the solidification of permanent US hegemony