Benchmark calculations of power distribution within assemblies

This paper presents the analysis and intercomparison of results produced in the framework of the international OECD Benchmark L-336, related to pin power distribution assessment within 'heterogeneous core type' configurations. The major objective of the benchmark can be considered as achieved. A fairly good convergence of the results is obtained although different techniques were used: Diffusion Theory with different numerical schemes: Finite Differences, Nodal, or Transport Theory with Pij, Sn, or Monte Carlo schemes applied to different kinds of nodalization (one or several meshes per element, an element being or a pin for the pin by pin calculations, either an assembly for the homogeneous calculations). (orig./DG)