1. NAME AND TITLE

DDXCODES: One-, Two- and Three-Dimensional Transport Codes Using Multigroup Double-Differential Form Cross Sections

AUXILIARY ROUTINES

MCFILEF: A pre-processor code which produces a control file for input to SPINPTF.

SPINPTF: A pre-processor which prepares an input file for PROF-DD.

PROF-DD: A code system to generate multigroup double-differential form cross sections (DDX) by processing basic nuclear data file in ENDF/B-IV or ENDF/B-V format.

DDXLIBMK: A program which reads the DDX data library and edits it for input to the transport codes.

ANISN-DD: A one-dimensional discrete ordinates transport code.

REACT: A program to calculate reaction rates from ANISN-DD output.

MONTA: A program which calculates the angular transfer probability for input to ANISN-DD.

MORSE-DD: A three-dimensional Monte Carlo transport code.

DATA LIBRARY

DDXLIB: Double-differential cross section library, available as RSIC package DLC-123.

2. CONTRIBUTORS

Japan Atomic Energy Research Institute, Ibaraki-ken, Japan.

3. CODING LANGUAGE AND COMPUTER

FORTRAN 77; FACOM M-380.

4. NATURE OF PROBLEM SOLVED

The DDXCODES were written to accurately predict the transport of neutrons by using the multigroup double-differential form cross sections. These types of cross sections can correctly take into account the energy-angle correlated reaction kinematics. Hence, the transport phenomenon in materials with highly anisotropic scattering is accurately calculated.

5. METHOD OF SOLUTION

The MCFILEF code prepares a control file for input to SPINPTF. SPINPTF then prepares input for PROF-DD by combining the control file and other input data. The PROF-DD code calculates the multigroup cross sections and angle-energy distributions (DDX). The program DDXLIBMK then reads the DDX formatted library and edits it into a specified format for input to ANISN-DD or MORSE-DD.

6. RESTRICTIONS OR LIMITATIONS

None noted.

7. TYPICAL RUNNING TIME

None noted.

8. COMPUTER HARDWARE REQUIREMENTS

DDXCODES will run on the FACOM M-380. With minor modifications, the codes can be modified to run on the IBM mainframes.

9. COMPUTER SOFTWARE REQUIREMENTS

DDXCODES are written in FORTRAN 77.

10. REFERENCES

a. Included in the package:

T. Mori, M. Nakagawa, M. Sasaki. One-, Two-, Three-Dimensional Transport Codes Using Multigroup Double-Differential Form Cross Sections, JAERI 1314, Ibaraki-ken, Japan, (November 1988).

M. Nakagawa, and T. Mori. MORSE-DD: A Monte Carlo Code Using Double Differential Form Cross Sections, JAERI-M 84-126, JAERI, Ibaraki-ken, Japan, (July 1984).

11. CONTENTS OF CODE PACKAGE

Included are the referenced documents and one DS/HD 5.25-inch diskette (1.2 MB), containing the FORTRAN 77 sources and sample problem.

12. DATE OF ABSTRACT

February 1991.