If a nuclear 'renaissance' arises, strategy will be at play: Russia and the US will obtain uranium from their 'partners', in Africa China will probably gain new partnerships, and other nations may encounter some difficulties.

Moreover (source: UNECE): "mining impacts are technically highly dependent on ore grade, as the efforts required to extract a fixed quantity of ore is proportional to the amount of rock to be extracted, therefore inversely proportional to the grade. This is true at the individual mine level, for which such a model could be derived; more importantly, this assumption is valid for open pit and underground mines. Warner and Heath test this relationship and its influence over the full life cycle of the technology, showing that a lowering ore grade may lead to tripling life-cycle GHG emissions by 2050 in case of a sustained growth of installed nuclear capacity"

Read: https://onlinelibrary.wiley.com/doi/full/10.1111/j.1530-9290... "Depending on conditions, median life cycle GHG emissions could be 9 to 110 g CO2-eq/kWh by 2050."