The reactor in the article, Natrium, is a small sodium-cooled fast reactor. https://en.wikipedia.org/wiki/Sodium-cooled_fast_reactor https://en.wikipedia.org/w

The reactor in the article, Natrium, is a small sodium-cooled fast reactor. https://en.wikipedia.org/wiki/Sodium-cooled_fast_reactor https://en.wikipedia.org/wiki/Sodium-cooled_fast_reactor https://en.wikipedia.org/wiki/PRISM_(reactor) https://en.wikipedia.org/wiki/PRISM_(reactor) https://en.wikipedia.org/wiki/Experimental_Breeder_Reactor_II#Passive_safety https://en.wikipedia.org/wiki/Experimental_Breeder_Reactor_I... https://www.nrc.gov/docs/ML2113/ML21139A048.pdf https://www.nrc.gov/docs/ML2113/ML21139A048.pdf