Statatus of the High-Temperature Gas-Cooled Reactor

General Atomic´s High-Temperature Gas-Cooled Reactor (HTGR) is discussed, with special reference to the 40-Mwe (electrical megawatts) prototype HTGR plant to be built at Peach Bottom, Pa. This plant will supply steam at 1,000 F (degrees Fahrenheit) and 1450 psia (pounds per square inch absolute); will have a fuel burn-up of 50,000 mw-davs per tonne; and will operate for 3 years without refueling, Recent developments in the prototype HTGR prograni include coated fuel particles, the single-wall fuel element, and measurements of the Doppler coefficient, using the HTGR critical assembly.