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PSR-0075 AXMIX.

AXMIX, ANISN Cross-Sections Mixing, Transport Corrections, Data Library Management

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1. NAME OR DESIGNATION OF PROGRAM:  AXMIX.
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2. COMPUTERS
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Program name Package id Status Status date
AXMIX PSR-0075/01 Tested 01-APR-1977

Machines used:

Package ID Orig. computer Test computer
PSR-0075/01 IBM 370 series IBM 370 series
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3. NATURE OF PHYSICAL PROBLEM SOLVED

Mixing, changing table length, adjointing, making scattering order adjustments (PN delta function subtraction), and transport corrections of ANISN-type cross sections, and management of cross section data sets and libraries.
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4. METHOD OF SOLUTION

The number of energy groups which will fit into  the core allocated is determined first. If all groups will fit, the  solution is straightforward. If not, then the maximum number of groups which will fit is processed repeatedly using direct access I/O and storage disks.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

Some flexibility in applying AXMIX is lost when cross sections to be processed contain upscatter. A special section on upscatter is therefore included in the report.
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6. TYPICAL RUNNING TIME

Problems of a practical nature require from 2  to 20 seconds of CPU time on the IBM 360/91 computer. Running time is inversely proportional to the number of groups of data which will fit into core memory. I/O time is 50 - 100 times CPU time.
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7. UNUSUAL FEATURES OF THE PROGRAM

Any number of data sets of all types (cards, nuclide libraries and group independent (GIP) libraries) may be referenced for input. GIP libraries may be referenced selectively by using the position number of the cross sections desired. In general, any or all forms of output (punched, tape, disk, printed) may be obtained at the same time by independent selection of cross sections for each form. In addition, output nuclide cross sections may be added to or merged with an existing nuclide library.
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8. RELATED AND AUXILIARY PROGRAMS

AMP (activity manipulation program)  may be used in conjunction with AXMIX to handle group responses and  conversion factors within the cross section tables and to perform some limited manipulation of cross sections by table position. Results of these codes are satisfactory for use by ANISN, DOT, MORSE and other codes of this family.
other codes of this family.
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9. STATUS
Package ID Status date Status
PSR-0075/01 01-APR-1977 Tested at NEADB
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10. REFERENCES
PSR-0075/01, included references:
- G.C. Haynes:
  The AXMIX Program for Cross Section Mixing and Library
  Arrangements
  (December 1974).
- W.W. Engle, Jr.:
  AMP (Activity Manipulation Program)
  (June 1975).
- W.A. Rhoades:
  The GIP Program for Preparation of Group-Organized Cross Section
  Libraries
  Informal Notes (November 1975).
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11. MACHINE REQUIREMENTS

In addition to the standard I/O equipment, the computer facility must have enough core memory to run all groups of  a problem at once. See also item 13 below.
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
PSR-0075/01 FORTRAN+ASSEMBLER
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13. OPERATING SYSTEM OR MONITOR UNDER WHICH PROGRAM IS EXECUTED

If
core memory is insufficient (see itme 11 above), direct access I/O routines of the FBSAM type developed by W.A. Rhoades et al. at ORNL  must be available.
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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS

ANY OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS
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15. NAME AND ESTABLISHMENT OF AUTHORS

Contributed by: Radiation Safety Information Computational Center
                Oak Ridge National Laboratory
                Oak Ridge, Tennessee, USA

Developed by:   Oak Ridge National Laboratory
                Oak Ridge, Tennessee, USA
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16. MATERIAL AVAILABLE
PSR-0075/01
File name File description Records
PSR0075_01.001 INFORMATION 11
PSR0075_01.002 ANISN LIBRARY DATA - BCD 1025
PSR0075_01.003 ANISN SOURCE PROGRAM - MIXED CODE 140
PSR0075_01.004 ANISN DD CARDS 6
PSR0075_01.005 ANISN INPUT DATA 1
PSR0075_01.006 ANISN OUTPUT 16
PSR0075_01.007 AXMIX ROUTINE 'LOC' - ASSEMBLER 7
PSR0075_01.008 AXMIX ROUTINE 'IDATEF' - ASSEMBLER 16
PSR0075_01.009 AXMIX ROUTINE 'BSAM' - ASSEMBLER 298
PSR0075_01.010 AXMIX SOURCE PROGRAM - FORTRAN IV MIXED 2564
PSR0075_01.011 DUMMY ROUTINES 'IDAY','ERROR' - F4 EBCDIC 10
PSR0075_01.012 AXMIX DD CARDS 9
PSR0075_01.013 AXMIX INPUT DATA 26
PSR0075_01.014 AXMIX OUTPUT 525
PSR0075_01.015 AMP SOURCE PROGRAM - F4 EBCDIC 1812
PSR0075_01.016 AMP INPUT DATA 31
PSR0075_01.017 AMP OUTPUT 322
PSR0075_01.018 GIP SOURCE PROGRAM - F4 EBCDIC 1633
PSR0075_01.019 GIP ROUTINES CRIT,ALOCAT ETC. - ASSEMBLER 208
PSR0075_01.020 GIP ROUTINES CRIT,ALOCAT ETC - F4 EBCDIC 45
PSR0075_01.021 GIP DUMMY ROUTINES (INTBCD,JOBNUM) ECBDIC 5
PSR0075_01.022 GIP DD CARDS 11
PSR0075_01.023 GIP INPUT DATA 225
PSR0075_01.024 GIP OUTPUT 612
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17. CATEGORIES
  • M. Data Management

Keywords: cross sections, data processing, transport theory.