One of the chief arguments against building more nuclear facilities is that various forms of renewable energy are less expensive. The problem there is the one that energy researchers are finding; some predictable source of power or long-term large-scale ("grid scale") energy storage technology is necessary. Yet all current designs for grid-scale energy storage are physically large, with extensive environmental impacts, and expensive as well. The cost argument against nuclear power is much weaker when one considers the costs of grid-scale storage.
University of Michigan's Center for Sustainable Systems Grid Energy Storage Fact Sheet
Stanford's Energy's Grid Scale Storage page.