The issues with sodium are manageable, as seen in other sodium-cooled reactors like the Russian BN-XXX or the US EBR-II. Sodium has other good properties which

The issues with sodium are manageable, as seen in other sodium-cooled reactors like the Russian BN-XXX or the US EBR-II. Sodium has other good properties which make up for the downsides, which is why most fast reactor designs have chosen sodium has the coolant.