Study on Acceleration of Three-Dimensional Method of Characteristics by GPU

The three-dimensional method of characteristics（MOC） can solve neutron transport equation for arbitrary geometry accurately.However,the MOC has some drawbacks: the convergence speed is slow and very time consuming.As a result,the research of acceleration of MOC is carried out.Compared with the CPU computing,the GPU computing,which is one of the most promising high performance computing,can achieve higher computing speed but with lower cost.And the development of general computing on GPU can be simplified with CUDA.To reduce the computing time and increase the computing efficiency,the study of three-dimensional MOC is performed and applied to the three-dimensional MOC code TCM.The computing results confirm the excellent acceleration of the code running on GPU.