Wiktionary
a. (context of a nuclear reactor English) that uses liquid sodium as a coolant
Usage examples of "sodium-cooled".
The Alfa plant achieved its high power not with a sodium-cooled system — as the Americans thought — but by running at a far higher pressure than any reactor system afloat and using a revolutionary heat exchange system that boosted the plant's overall thermal efficiency to forty-one percent, well in excess of that for any other submarine.
The Alfa plant achieved its high power not with a sodium-cooled system — as the Americans thought — but by running at a far higher pressure than any reactor system afloat and using a revolutionary heat exchange system that boosted the plant’s overall thermal efficiency to forty-one percent, well in excess of that for any other submarine.