ABSTRACT
This chapter discusses each of the designs and their relevance to the field of nuclear power as a whole. The mobile power reactor (MPR) is a small, highly enriched pressurized water reactor that can be used to power the propulsion systems in nuclear-powered aircraft carriers and submarines. Suppose that a military power reactor to be used in a nuclear submarine is designed with an initial enrichment of 95% and that this MPR has a 50-year refueling cycle. As far as nuclear reactors go, the fuel used in the high-temperature gas reactor (HTGR) is unique. The inlet temperatures and the outlet temperatures are higher for the HTGR than they are for the advanced gas reactor (AGR), and in the case of the HTGR, the outlet temperature can sometimes exceed 740°C. The design of the cores is considerably different for an AGR and a HTGR. The high-temperature gas reactor is the American equivalent of the British AGR.
