Investigation of Potential Utilization for Light Water Reactor Spent Fuel and Thorium Fuel in ACR-700

The potential utilization of light water reactor (LWR) spent fuel and thorium fuel is a very efficient way for solving spent fuel processing and nuclear fuel shortage problems. Four different mixed fuel types with LWR spent fuel and Th fuel were researched in ACR-700 using SCALE5.1 code system. Compared with the ACR-700 standard fuel, the fuel cycle model 1 and 4 can reach higher burnup. According to the research on the lattice physics of ACR-700 fuel bundle, it is indicated that LWR spent fuel after separation of the fission products is a very prospective fuel in ACR-700 and ²³²Th can be a preferable fertile isotope if sufficient booster fuel is supplied.