Funding for the source is interesting:
> "The Alliance for Science is a global communications initiative based at the Boyce Thompson Institute, an independent nonprofit research institute affiliated with Cornell University. Our primary source of support is the Bill & Melinda Gates Foundation."
The article does gloss over where Finland would source its uranium from. A GW-scale nuclear power plant burns through ~200 tons of fuel rods per year, and Finland's supplier seems to have been the Russian state-owned uranium outfit Rosatom:
https://www.reuters.com/business/energy/rosatoms-unit-seeks-...
Finland does have plans to start mining and refining uranium ore, but it looks like they'll produce only enough for one reactor:
> "Last year, 35% of Finnish electricity production came from the country’s four nuclear reactors, whose owners Fortum and TVO buy their nuclear fuel from other countries including Russia, France and Canada."
Anyone holding ownership in Canada's high-grade uranium ores is likely going to do well by this move. About that...
https://www.cnbc.com/2021/02/25/bill-gates-nuclear-power-wil...
Regardless, countries like Finland which are solar-limited for much of the year are the obvious place for nuclear. Whether they can make their domestic uranium mining operations 'clean and fossil-fuel free', and secure reasonably priced contracts for importing the rest of their required reactor fuel, remains to be seen.