Supercritical CO2 There has been on going research in the development of a S-CO2 power conversion cycle for use in terrestrial fast reactor applications. The principle work in this area was conducted by Vaclav Dostal and his work is detailed in his ScD thesis linked below. [ : ] Design of a S-CO2 Cycle for more information on Brayton cycle startup operations in space reactor application see the following paper from Am. Nucl. Soc. Trans. [ : ] Brayton Cycle Startup in Space Applications [ : ] back