SUMMARY OF GAS COOLED REACTOR DEVELOPMENT experience base is 1360 reactor years 34 gas cooled reactors (Magnox and AGRs, cooled by CO2) are operating in UK generating most of its nuclear electricity; CO2 cooled reactors have also operated in France, Japan, Italy and Spain HTGRs (cooled by helium) have operated in UK (1), Germany (2) and the USA (2) The 30 MW(th) HTTR test reactor in Japan (at Oarai) achieved criticality in November, 1998 In China, the 10MW(th) pebble bed High Temperature Reactor (HTR-10) at Tsinghua University achieved criticality in December 2000. A 115 MWe Pebble Bed HTR is being designed by ESKOM (South Africa) for highly efficient generation of electricity The US, Russia, France and Japan are working on the preliminary design of a GT-MHR for Pu consumption and electricity and process heat production

PBMR Fuel Particle