COMPARISON OF CALCULATED AND MEASURED CRITICAL SIZES FOR SOME ZED-2 LATTICES
J. Thibaudeau, E. Critoph · OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) · 1965
Many computer programs exist which solve the diffusion equations with various types of boundary conditions. Most of them use a homogeneous approach to the solution. The only program in use at Chalk River which takes into account explicitly the heterogeneous structure of a lattice is SYMMETRIZE. A study of some lattices of 7 and 19-element U0{sub 2} clusters, which have been measured in ZED-2, was undertaken to compare the predictions of differents programs with measurements. In this study HEX, FLAME and SYMMETRIZE were used. Using these programs, it has been possible to assess the errors associated with most of the approximations contained in each of these programs and derive corrections for them. The measured buckling was finally compared with the bucklings obtained from the programs with these derived corrections applied. (auth)