Host: The Japan Society of Mechanical Engineers
Name : The 30th International Conference on Nuclear Engineering (ICONE30)
Date : May 21, 2023 - May 26, 2023
This paper aims to establish a general resonance calculation method under various neutron spectrum characteristics. The subgroup method with the narrow approximation is chosen as resonance calculation method based on the ultra-fine group structure. In order to consider the heterogeneous resonance effect, the heterogeneous resonance calculation is performed with the method of characteristics. Besides, the embedded self-shielding method is applied to handle the interference effect between different resonance nuclides. Serval typical problems with different neutron spectrum characteristics, including thermal spectrum, intermediate spectrum and fast spectrum problems, are designed to verify the effectiveness of resonance calculation. The numerical results show that the chosen methods are applicable to all problems. It also revealed that the mesh grid of resonance calculation could be coarser than that of transport calculation.
