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The ETOE-2/MC 2 -2/SDX multigroup cross-section processing codes have been designed to provide a comprehensive neutron cross-section processing capability for a wide range of applications including critical experiment analysis and core design calculations. Fundamental nuclear data from ENDF/B provide the primary input to the code system and the output consists of a user-specified CCCC ISOTXS multigroup cross-section data file, Great flexibility has been provided to the user in specifying the rigor of the calculation so that a unified cross-section processing system with a single data base is available which may be used for both preliminary survey scoping studies and rigorous design calculations.The principal program blocks of the code system include: a library processor and format converter between ENDF/B data and the KC 2 -2/SDX library; an ultra-fine-group fundamental mode calculation (MC 2 -2) which provides a composition dependent spectrum calculation and broad-group collapsing capability; a rigorous hyper-fine-group spatially heterogeneous resolved resonance calculation (RABANL) to supplement the more approximate NR approximation used in the ultra-fine-group treatement; and an intermediate group space-dependent capability (SDX).

Results reported in the FRA series of memoranda frequently are preliminary and subject to revision. Consequently they should not be quoted or referenced without the authors' permission.