For radiation protection and reactor safety improved accuracies are required in analysis of radiation penetration. For checking the consistency of neutron cross-sections with integral data of deep penetration experiments we have designed the computer program ADJUST-EUR, which operates within the modular system RSYST. To adjust partial group cross-sections an iterative procedure is applied based on the least-square method and using the results of one- and twodimensional transport calculations with linear perturbation theory. The iron experiments ASPISIAEE-Winfrith and EURACOSIEuratom-Ispra are analysed. The adjustment of the inelastic and elastic iron cross-sections is made in the 100 group EURLIB structure using the newest error covariance information. Radiation shielding, iron, group cross-sections, adjustment, computer program, integral experiments. The need for detailed consistency checks with inte-Need of group data adjustment gral measurements have been worked out quite clearly in the course of two shielding benchmark exercises proposed by NEACRP for power reactors of fast breeder and For determination of target quantities in radiao
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