LWGR — Light Water Graphite Reactor

Reactor technology overview and global count

LWGR stands for Light Water Graphite Reactor. Graphite-moderated, water-cooled channel-type design; the Soviet RBMK is the best known example. The type is associated with the Chernobyl accident, and the remaining units are being phased out. In the WhereNuc dataset there are 25 recorded LWGR units across 3 countries, of which 11 are operational and 1 under construction. Their combined net operating capacity is about 7,433 MW. The earliest recorded LWGR unit entered commercial operation in 1954, the most recent in 1990.

Countries using LWGR reactors

Common LWGR models

Other reactor types