Sodium-cooled fast reactor

A sodium-cooled fast reactor is a fast neutron reactor cooled by liquid sodium. No fission productshave a half-lifein the range of100–210 k years ...... nor beyond 15.7 M yearsLegend for superscript symbols₡  has thermal neutron capture cross section in the range of 8–50 barnsƒ  fissilem  metastable isomer№  primarily a naturally occurring radioactive material (NORM)þ  neutron poison (thermal neutron capture cross section greater than 3k barns)†  range 4–97 y: Medium-lived fission product‡  over 200,000 y: Long-lived fission product A sodium-cooled fast reactor is a fast neutron reactor cooled by liquid sodium. The acronym SFR particularly refers to two Generation IV reactor proposals, one based on existing LMFR technology using MOX fuel, the other based on the metal-fueled integral fast reactor.