Sodium-cooled fast reactor
Type of nuclear reactor cooled by molten sodium
Sodium-cooled fast reactor
A sodium-cooled fast reactor (SFR) is a fast neutron reactor cooled by liquid sodium. It offers several advantages over light-water reactors (LWRs), including high thermal efficiency and power density. A fast spectrum allows SFRs to destroy transuranic waste products in the spent fuel of LWRs, significantly reducing the quantity and lifetime of radioactive waste. The primary disadvantage is sodium's chemical reactivity, which requires special precautions to prevent and suppress fires. An SFR uses liquid metallic sodium to carry heat from the reactor core. Sodium's low melting point and high boiling point allow a sodium-cooled reactor to operate at high temperature while remaining at atmospheric pressure. The elimination of pressurized coolant effectively eliminates the risk of a loss-of-coolant accident, while the higher-temperature operation provides better thermal efficiency than light-water reactors. There are two main design approaches to sodium-cooled fast reactors. In pool-type reactors...
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