Gas-Cooled Reactors [25]

9.182. Gas-cooled reactors such as the HTGR have the advantage of not having the boiling crisis design limit characteristic of water-cooled reactors. The core thermal design is based on classical methods describing conduction and convection transport to a gas with the aid of suitable com­puter codes. A design objective is to achieve a core power distribution so that the coolant exit temperature will be radially uniform. Power peaking factors developed by computer codes are used primarily as a design aid in modeling the core power distribution.