More than one-third of US nuclear plants are unprofitable or scheduled to close. Scientists (UCS) assessed the economic viability of the US nuclear fleet. nuclear power plants while supporting the growth of other low carbon technologies. 15 Apr 2010 In addition to energy efficiency and low-carbon renewable options, two technologies that could do much of the heavy lifting in the future are Nuclear in Future Energy Markets: Economic Drivers, Barriers, and. Impacts in the United States. EPRI, Palo Alto, CA: 2018. 3002011803. iii.