EXPANDA-General user's guide

Generalized EXPANDA; EXPANDA-General: A one-dimensional diffusion criticality and perturbation code has been developed based on the code EXPANDA-70DRA. The new code has following characteristics; (1) Variable dimensioned coding is adopted. Hence this code is completely free from dimensional restrictions encountered at the fixed dimentioned code. There are no limitations for number of energy groups, regions, mesh points. (2) Acceptable all of the libraries; JAERI-Fast set, JENDL-1 and 2 set, ENDF/B IV set. (3) Possibility of exact perturbation calculation as well as first order perturbation. (4) Semi-automatic preparation of input data for two or three dimensional criticality calculation codes; CITATION or EXTERMINATOR-2. (5) Semi automatic preparation of input data for two or three dimensional perturbation calculation codes; CIPER or PERKY. (6) More accurate treatment for elastic removal effective cross sections for light and medium weight nuclides in the resonance region using exact weighting fluxes solved by recurrence formulae numerically. (7) Proper treatment for gross region heterogeneity due to the large material change at the interface of regions. (8) More efficient and easy treatment for the comparison of C/E (calculated to experimental) values of typical integral data obtained by the benchmark test in order to assess the applicability of the group cross section libraries. (9) Adoption of self-explanation systems in the group cross section library: General-Library, i.e. all of the informations to define the library are contained in that library itself. Therefore any structured library such as any group number and any independent parameters of self-shielding factor tables is accessed by this new code. (author)