Advanced Gas Reactor

Yildiz, Hohnholt, Kazimi (2006), Hydrogen Production Using High-temperature Steam Electrolysis Supported by Advanced Gas Reactors with Supercritical C02 Cycles , Nuclear Technology, 155. 

NOTE LWR = light-water reactor S-AGR = supercritical C02 advanced gas reactor S-I = sulfur-iodine Cu-Cl = copper-chlorine HTGR = high-temperature gas-cooled reactor AHTR = advanced high-temperature reactor HTES = high-temperature electrolysis of steam. 

The gas-cooled reactors were developed in Great Britain using CO2 as the gas coolant and graphite as the moderator with natural uranium metal as the fuel. The thermal efficiency is about 25%. With uranium enriched to 2.2% as the oxide (UO2) fuel, the thermal efficiency increased to 41% and is called the advanced gas reactor (AGR). Helium is also used in a high-temperature version. 

Petti, D., 2014. Implications of results from the advanced gas reactor fuel development and qualification program on licensing of modular HTGRs. Paper HTR2014-31252. In Proceedings of the HTR 2014, Weihai, China, October 27—31. 

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