1. NAME AND TITLE

MARS: Collection of Computer Codes for Manipulating Multigroup Cross Section Libraries in AMPX or CCCC Formats.

AUXILIARY ROUTINES

AIM Convert mode of AMPX libraries.

AJAX Merge, collect, assemble, reorder AMPX libraries.

AXMIX Mix and merge ANISN libraries.

BONAMI-S Resonance self shield by Bondarenko method.

CHOX Combine neutron, photon, AMPX libraries.

CHOXM Self shield via SPHINX.

CLAROL Replace data at group level on AMPX library.

COMAND Collapse ANISN libraries.

COMET Correct selected portions of AMPX library.

DIAL Selectively edit AMPX library.

ICE-2 Mix AMPX Working library cross sections.

MALOCS Collapse AMPX libraries.

NITAWL Resonance self shield via Nordheim treatment.

RADE Check AMPX libraries.

XSDRNPM 1-D transport calculation by discrete ordinates.

GRPS Convert built-in group structure data to binary.

LASIP-III: Prepare and convert CCCC libraries.

BINX: Convert CCCC libraries.

LINX: Combine CCCC libraries.

I2IP: Select materials from ISOTXS interface.

B2BP: Select materials from BRKOXS interface.

CINX: Collapse CCCC libraries.

SPHINX: Self-shield and space-energy collapse by Bondarenko method.

DEFILE: Service routines for SPHINX.

I2D: Convert ISOTXS library into discrete ordinates form.

GIP: Prepare group independent tape for ANISN.

ANISN: 1-D transport by discrete ordinates method.

2. CONTRIBUTORS

Oak Ridge National Laboratory, Oak Ridge, Tennessee.

Los Alamos National Laboratory, Los Alamos, New Mexico.

Westinghouse Advanced Reactor Division, Pittsburgh, Pennsylvania.

3. CODING LANGUAGE AND COMPUTER

Fortran IV, Assembler Language; IBM 360/370.

4. NATURE OF PROBLEM SOLVED

MARS is a collection of various AMPX modules and CCCC retrieval code intended to be used with data libraries that contain data in those formats. Examples of such are DLC-40/LIB-IV, DLC-41/VITAMIN-C, DLC-53/VITAMIN-4C, DLC-42/CLEAR, DLC-43/CSRL, DLC-52/EPMASTER, and DLC-113/VITAMIN-E.

5. METHOD OF SOLUTION

The AMPX and CCCC formatted libraries of multigroup cross sections found in some data libraries are more versatile and contain more information than the usual cross section libraries available from RSIC in ANISN format. They allow the user to perform his own resonance self-shielding and Doppler broadening as well as other manipulations. Thus, it is possible for the user to derive his own problem-dependent cross sections from the DLCs in AMPX and CCCC format using PSR-117/MARS.

6. RESTRICTIONS OR LIMITATIONS

None noted.

7. TYPICAL RUNNING TIME

No study has been made by RSIC of typical running times for MARS.

8. COMPUTER HARDWARE REQUIREMENTS

MARS is operable on the IBM 360/370 computers.

9. COMPUTER SOFTWARE REQUIREMENTS

Fortran IV and Assembler Language compilers are required.

10. REFERENCES

"Miscellaneous Informal Notes" (1978).

AMPX Modules Description; unless noted modules were taken from ORNL/TM 3706.

G. E. Bosler, R. D. O'Dell, and W. M. Resnik, "LASIP-III, A Generalized Processor for Standard Interface Files," LA-6280-MS (April 1976).

R. E. MacFarlane and R. B. Kidman, "LINX and BINX: CCCC Utility Codes for the MINX Multigroup Processing Code," LA-6219-MS (February 1976).

G. E. Bosler, "Input Instructions for I2I and B2B Computer Codes for Reducing or Rearranging Data for Isotopes Contained on ISOTXS and BRKOXS Files" (August 1976).

J. E. White, "IBM-360 Versions of the BINX, CINX, and LINX Utility Codes--CINX Input Instructions" (March 1977).

R. B. Kidman and R. E. MacFarlane, "CINX: Collapsed Interpretation of Nuclear X Sections," LA-6287-MS (April 1976).

R. Q. Wright, "SPHINX: Resonance and One Dimensional Diffusion Theory Nuclear Cross Section Processing Code (IBM Version)," Draft (March 1978).

W. M. Resnik II, "I2D: Code for Conversion of ISOTXS Structured Data to DTF and ANISN Structured Tables," LA-6857-MS (June 1977).

W. A. Rhoades, "The GIP Program for Preparation of Group-Organized Cross Section Libraries," Informal notes (November 1975).

G. C. Haynes, "The AXMIX Program for Cross Section Mixing and Library Arrangement," ORNL/TM-5295 (December 1974).

11. CONTENTS OF CODE PACKAGE

Included are the referenced documents and one (1.2MB) DOS diskette which contains the source code and data input.

12. DATE OF ABSTRACT

March 1984; revised November 1987, April 1990, and May 1991.