An energy recondensation method using the discrete generalized multigroup energy expansion theory

作者：Zhu Lei; Forget Benoit^*

来源：Annals of Nuclear Energy, 2011, 38(8): 1718-1727.

DOI：10.1016/j.anucene.2011.04.008

• Energy expansion
• Cross-section recondensation
• Generalized multigroup
• Discrete orthogonal polynomials

In this paper, the discrete generalized multigroup (DGM) method was used to recondense the coarse group cross-sections using the core level solution, thus providing a correction for neighboring effect found at the core level. This approach was tested using a discrete ordinates implementation in both 1-D and 2-D. Results indicate that 2 or 3 iterations can substantially improve the flux and fission density errors associated with strong interfacial spectral changes as found in the presence of strong absorbers, reflector of mixed-oxide fuel. The methodology is also proven to be fully consistent with the multigroup methodology as long as a flat-flux approximation is used spatially.

• 出版日期2011-8