NJOY-UTILITIES-EIR, Utility Program EPLOTR, CPLOTR, SEPR, COMBR, DECAYR for NJOY

1 - Description of program or function: EPLOTR is designed to plot evaluated cross sections in the ENDF/B format. The program plots cross sections, angular distributions, energy distributions and other parameters. CPLOTR compares ENDF/B formatted data from two separate input files. The program produces a series of comparative plots containing the standard cross section and second cross section and/or the ratio of the second cross section to the first cross section. SEPR: Select data for one or more temperatures from a file. COMBR: - Combine optionally ENDF, PENDF or GENDF Binary Cross Section files given in ENDF/B-IV or ENDF/B-V format and select the format of the output file - Copy optionally ENDF, PENDF or GENDF Binary Cross Section files or change their format from ENDF/B-IV to ENDF/B-V format or from ENDF/B-V to ENDF/B-IV. DECAYR: Prints radioactive Decay and fission yield data from MF=8. 2 - Method of solution: In plotting cross sections, EPLOTR reads all sections of File 3 and divides them into five categories: - total, elastic, capture, fission, and total inelastic; - total inelastic, discrete levels, and continuum; - (n,2n), (n,3n), (n,n' charged particle); - (n, charged particle); - nu(total and delayed), mu, and xi. Each category is plotted separately. If a cross section is given for one or more reactions in any given category, all cross sections of that category are plotted on a single frame, spanning the energy range from 0.01 eV or the minimum threshold up to the maximum energy tabulated. More detailed plots can be obtained by using the zoom commands. For CPLOTR, reactions are considered to be comparable if they have the same (ZA,MT) combination. The reactions compared will be plotted if they differ by a user-specified allowable difference. 3 - Restrictions on the complexity of the problem: EPLOTR uses only the ENDF/B BCD format and skips all sections except nu(E) (total and delayed) as well as Files 4 and 5. Thus the program may be used to plot cross sections (File 3) in the ENDF/B-I, II, III, IV, and V format, because all sections of File 3 data are identical in all ENDF/B versions. Nu(E) in File 1 and Files 4 and 5 are assumed to be in the ENDF/B-IV format. All tabulated data must be linearly interpolable. For CPLOTR, cross sections must be either in histogram or linearly interpolable form