Study on Neutronics Performance of Flower Shape Advanced Supercritical Water Cooled Fast Reactor with Different Solid Moderators

The supercritical water cooled fast reactors worked at such harsh condition with high temperature and high pressure, huge hydrogen balance pressure and thermal shock can result in a great loss of hydrogen. The released hydrogen would be out of control under accident situations. K_eff, conversation ratio, moderator temperature effect, Doppler effect and void effect of different material such as Zr H_1.7, Be, Be O, C and Si C are discussed. Be O and Si C hold better integrated performance among these materials. Besides, moderators have less effect on the Doppler effect of fuel.