This may be more complicated than that, see https://news.ycombinator.com/item?id=29159944
> Japan reactivating nuclear reactors:
Japan invested on nuclear then nowadays don't want it anymore but now needs energy. One has to see them canceling their planned phase-out, as "in March 2021, only 11 percent of Japanese said they wanted that nuclear energy generation be discontinued immediately. Another 49 percent was asking for a gradual exit from nuclear energy" ( https://en.wikipedia.org/wiki/Nuclear_power_in_Japan#Post-Fu... )
> UK. Rolls-Royce gets funding
"£195m cash injection from private firms and a £210m grant" are ridiculous sums. In France Macron announced 1 billion €: given that nuclear research already burnt ~900 millions € per year (public research), a fair part of the 2.2 billions allocated to the CEA's civilian programs, this isn't decisive.