Irradiation Test of the Coated Fuel Particle for 10 MW High Temperature Gas-Cooled Reactor

The TRISO type coated fuel particle consists of a microspherical fuel kernel and coating layers of porous pyrolytic carbon, inner dense pyrolytic carbon, pyrolytic silicon carbide and outer dense pyrolytic carbon. On the basis of cold qualification test, the irradiation tests (closed capsule and sweep loop rig) of the coated fuel particles for 10 MW high temperature gas-cooled reactor (HTR-10) were carried out. When the irradiation temperature is 1 000 ℃, and the maximum burnup and fast neutron fluence reach 95 GW·d·t -1(U) and 1.28×10 25 m -2, respectively, the release rate of the fission gas 85Krm from coated fuel particles is 1.02×10 -6. The post-irradiation examination (PIE) confirms that the coated particles did not fail. The result of irradiation test shows that the properties of coated fuel particles can meet the design specification ( safety operating) of HTR-10.