Computer Programs
NEA-1347 NSLINK.
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NEA-1347 NSLINK.

NSLINK, Coupling of NJOY Cross-Sections Generator Code to SCALE-3 System

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1. NAME OR DESIGNATION OF PROGRAM:  NSLINK.
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2. COMPUTERS
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Program name Package id Status Status date
NSLINK NEA-1347/01 Tested 16-OCT-1991

Machines used:

Package ID Orig. computer Test computer
NEA-1347/01 DEC VAX 8350 DEC VAX 8810
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3. DESCRIPTION OF PROGRAM OR FUNCTION

NSLINK (NJOY - SCALE - LINK) is a set of computer codes to couple the NJOY cross-section generation  code to the SCALE-3 code system (using AMPX-2 master library format) retaining the Nordheim resolved resonance treatment option.
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4. METHOD OF SOLUTION

The following module and codes are included in  NSLINK:

XLACSR: This module is a stripped-down version of the XLACS-2 code. The module passes all l=0 resonance parameters as well as the contribution from all other resonances to the group cross-sections,  the contribution from the wings of the l=0 resonances, the background cross-section and possible interference for multilevel Breit-Wigner resonance parameters. The group cross-sections are stored in the appropriate 1-D cross-section arrays. The output file  has AMPX-2 master format. The original NJOY code is used to calculate all other data. The XLACSR module is included in the NJOY  code.

MILER: This code converts NJOY output (GENDF format) to AMPX-2 master format. The code is an extensively revised version of the original MILER code. In addition, the treatment of thermal scattering matrices at different temperatures is included.

UNITABR: This code is a revised version of the UNITAB code. It merges the output of XLACSR and MILER in such a way that contributions from the bodies of the l=0 resonances in the resolved  energy range, calculated by XLACSR, are subtracted from the 1-D group cross-section arrays for fission (MT=18) and neutron capture (MT=102). The l=0 resonance parameters and the contributions from the bodies of these resonances are added separately (MT=1023, 1022 and 1021). The total cross-section (MT=1), the absorption cross- section (MT=27) and the neutron removal cross-section (MT=101) values are adjusted.

In the case of Bondarenko data, infinite dilution values of the cross-sections (MT=1, 18 and 102) are changed in the same way as the 1-D cross-section.

The output file of UNITABR is in AMPX-2 master format and includes Nordheim parameters or Bondarenko and Nordheim parameters for the resonance treatment in BONAMI and/or NITAWL, which are codes of the  SCALE system.

BONAMI: In order to take into account the combination of Bondarenko and Nordheim resonance treatment, certain subroutines are included in the package which replace some subroutines in the BONAMI code.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM:
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6. TYPICAL RUNNING TIME

A sample problem (U235) with 187 neutron groups and Legendre polynomial order 3 (P3), requires on a DEC VAXstation 300 (model 30) for XLACSR 8 minutes; MILER 80 seconds and UNITABR 8 seconds.
NEA 1347/01: NEA-DB ran the sample cases of the program system supplied with this package on a VAX 8810 computer. The following execution times were found for the different components:
    Sample Problem     NJOY      MILER      UNITABR
    --------------     ----      -----      -------
         1           1h20m40s     41s          --
         2           1h00m25s     41s         3s47
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7. UNUSUAL FEATURES OF THE PROGRAM

The present version of the code package is designed for the NJOY87 code. It can be used with the NJOY89 code as well, by a minor change of the main routine of NJOY89 (add 5 statements).
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8. RELATED AND AUXILIARY PROGRAMS

AMPX-II modules (RADE, DIAL, CHOX,  AIM, etc.) can be used to check, edit, couple convert etc. the output files. Standard AMPX-II and NJOY subroutines and functions are widely used in NSLINK.
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9. STATUS
Package ID Status date Status
NEA-1347/01 16-OCT-1991 Tested at NEADB
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10. REFERENCES

- R.E. MacFarlane and D.W. Muir:
  NJOY87 - A Code System for Pointwise and Multigroup and Photon
  Cross Sections from ENDF/B Evaluated Nuclear Data
  PSR-171 (November 1987).
- N.M. Greene et al:
  AMPX - A Modular Code System for Generating Coupled Multigroup
  Neutron-Gamma Libraries from ENDF/B (March 1976)
  Revised to level of AMPX-II, ORNL/TM-3706 (December 1978).
- SCALE-3.1 - A Modular Code System for Performing Standardized
  Computer Analysis for Licensing and Evaluation
  CCC-466 (March 1985; July 1986).
- SCALIAS-3.1 - Selected FORTRAN 77 Modules from SCALE-3.1
  (October 1986).
- N.M. Greene:
  Private Communication (November 1988).
- G.C. Panini:
  MILER - Master Interfaces Library makER
  abstract NEA 1198 (July 1988).
NEA-1347/01, included references:
- P.F.A. de Leege:
  NSLINK (NJOY-SCALE-LINK)
  (September 1991).
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11. MACHINE REQUIREMENTS

XLACSR requires 1600 Kbytes, MILER 800 Kbytes and UNITABR 400 Kbytes of core memory on a VAX computer. Depending on the input choice the following scratch disc space is necessary: XLACSR 200 Kbytes; MILER 40 Mbytes and UNITABR 600 Kbytes.
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
NEA-1347/01 FORTRAN-77
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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED:  VAX/VMS 5.3.
NEA-1347/01
VAX/VMS V5.3
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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:
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15. NAME AND ESTABLISHMENT OF AUTHORS

          P.F.A de Leege
          Delft University of Technology
          Interfaculty Reactor Institute
          Reactor Physics Department
          Mekelweg 15
          NL-2629 JB Delft, The Netherlands
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16. MATERIAL AVAILABLE
NEA-1347/01
File name File description Records
NEA1347_01.001 Information file 115
NEA1347_01.002 NJOY87 main source 300
NEA1347_01.003 XLACSR source 8708
NEA1347_01.004 NJOY87 subroutines 50486
NEA1347_01.005 MILER source 4785
NEA1347_01.006 UNITABR source 2757
NEA1347_01.007 BONAMI subroutines 454
NEA1347_01.008 Command file to compile and link 15
NEA1347_01.009 JEF-1 H1 data 521
NEA1347_01.010 JEF-1 H1-H2O thermal scattering law data 24398
NEA1347_01.011 JEF-1 U235 data 5344
NEA1347_01.012 Sample problem 1 input NJOY87 57
NEA1347_01.013 Sample problem 2 input NJOY87 128
NEA1347_01.014 Sample problem 1 and 2 input MILER 2
NEA1347_01.015 Sample problem 2 input UNITABR 6
NEA1347_01.016 Command file to run NJOY87 43
NEA1347_01.017 Command file to run MILER 25
NEA1347_01.018 Command file to run UNITABR 13
NEA1347_01.019 Sample problem 1 output NJOY87 22204
NEA1347_01.020 Sample problem 2 output NJOY87 20079
NEA1347_01.021 Sample problem 1 output MILER 270
NEA1347_01.022 Sample problem 2 output MILER 390
NEA1347_01.023 Sample problem 2 output UNITABR 341
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17. CATEGORIES
  • B. Spectrum Calculations, Generation of Group Constants and Cell Problems
  • M. Data Management

Keywords: cross sections, data library, data processing, multigroup, resonance.