Diffusion coefficients for LMFBR cells calculated with MOC and Monte Carlo methods

作者：van Rooijen W F G^*; Chiba G

来源：Annals of Nuclear Energy, 2011, 38(1): 133-144.

DOI：10.1016/j.anucene.2010.08.004

• Diffusion coefficient
• LMFBR
• Planar void
• Method of characteristics
• Monte Carlo
• Benoist formalism

The present work discusses the calculation of the diffusion coefficient of a lattice of hexagonal cells with both,odium present and sodium absent conditions Calculations are performed in the framework of Lance theory (also known as fundamental mode approximation) Unlike the classical approaches our heterogeneous leakage model allows the calculation of diffusion coefficients under all conditions even if planar voids are present in the lattice Equations resulting from this model are solved using the method of characteristics (MOC) Independent confirmation of the MOC result comes from Monte Carlo calculations in which the diffusion coefficient is obtained without any of the assumptions of lattice theory It is shown by comparison to the Monte Carlo results that the MOC solution yields correct values of the diffusion coefficient under all conditions even in cases where the classic calculation of the diffusion coefficient fails This work is a first step in the development of a r

• 出版日期2011-1