China prepares to test thorium-fuelled nuclear reactor
China seems to be the only country still exploring new nuclear fission technologies commercialization at government level. In the US and other western countries it is mostly by commercial companies so I feel China probably will take the lead in nuclear in the next few decades. As this requires decades long planning and commercial companies are unable to work unless they get quick results. I previously submitted about China's plan to convert nuclear waste to glass for easier storage. So China seems to have planned to use a lot of nuclear power in the future and has also made plans for storing the nuclear waste.
https://news.ycombinator.com/item?id=28507599