last modified: 01-APR-1974 | catalog | categories | new | search |

DLC-0018 ZZ-DLC-18/NAB.

ZZ DLC-18 NAB, 100 Neutron-Group Cross-Section Library of Na and Al for ANISN, DOT, MORSE Neutron Transport

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1. NAME OR DESIGNATION OF PROGRAM:  ZZ-DLC-18/NAB. 100-group P3 neutron cross section data for sodium and aluminium.
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2. COMPUTERS
To submit a request, click below on the link of the version you wish to order. Only liaison officers are authorised to submit online requests. Rules for requesters are available here.
Program name Package id Status Status date
ZZ-DLC-18 DLC-0018/01 Tested 01-APR-1974

Machines used:

Package ID Orig. computer Test computer
DLC-0018/01 Many Computers Many Computers
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3. NATURE OF PHYSICAL PROBLEM SOLVED

  FORMAT: ANISN, DOT, and MORSE

  NUMBER OF GROUPS: 100 neutron group

NUCLIDES: sodium or sodium contained in aluminium tanks. With             following impurities:
                        calcium     400 ppm
                        oxygen      200 ppm
                        potassium   150 ppm
                        hydrogen     50 ppm

  ORIGIN: ENDF/B-3 MAT 1156 sodium and MAT 1135 aluminium.

WEIGHTING SPECTRUM: - 1/E weighting spectrum for non-thermal energies,
- thermal group cross sections were determined  by   assuming  a  Maxwellian  weighting  function and a constant scattering cross section and a 1/v absorption cross section.

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DLC-18 is suitable for multigroup neutron transport calculations in  sodium or sodium contained in aluminium tanks, such as the ORNL-LMBNR sodium benchmark experiment (2). The retrieval program manipulates such that it can be used in codes such as ANISN, DOT, and MORSE.
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4. METHOD OF SOLUTION

The 100 neutron group, P3 data were produced by the ORNL Mathematics Division, using SUPERTOG, and a 1/E weighting spectrum for non-thermal energies. The energy group structure is that used for the GAM-2 which covers the energy range from 14.92 MeV to thermal. The thermal group cross sections were determined by assuming a Maxwellian weighting function and a constant scattering cross section and a 1/v absorption cross section.
This data represents a P3 Legendre expansion approximation for neutron elastic scattering. Inelastic neutron scattering was treated as isotropic in the lab system.
The multigroup cross sections were generated from a preliminary version of the ENDF/B-3 MAT 1156 sodium and MAT 1135 aluminium. Subsequent changes to the evaluated data prior to its official release as part of ENDF/B-3 would affect the data in DLC-18/NAB somewhat, but probably not significantly.
Because the materials used in the experiment were not free from impurities, these were included as follows

     calcium     400 ppm
     oxygen      200 ppm
     potassium   150 ppm
     hydrogen     50 ppm
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM
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6. TYPICAL RUNNING TIME

To read the NAB data from a card image tape and rewrite it on an unformatted tape requires 15 seconds on the IBM 360/91.
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7. UNUSUAL FEATURES: UNUSUAL FEATURES OF THE PROGRAM
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8. RELATED AND AUXILIARY PROGRAMS

LIBGEN is a modified version of the  library generation routine which is available in the ANISN code package. This version will read data from a card image tape, the mode by which NAB is distributed, and write an unformatted tape for  direct use with ANISN.
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9. STATUS
Package ID Status date Status
DLC-0018/01 01-APR-1974 Tested at NEADB
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10. REFERENCES

- F.R. Mynatt, M.J. Gritzner, R.E. Maerker, and B.J. McGregor:
  'Fast Reactor Shielding Monthly Progress Report for March 1972, 189A no. 10028, Activity no. 40 01 61'
  ORNL-TM-3800 (May 1972).
- L.R. Williams:
  'Input Description for LIBGEN'
  Informal Notes (1972).
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11. HARDWARE REQUIREMENTS: MACHINE REQUIREMENTS
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12. PROGRAMMING LANGUAGE(S) USED

No item found

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13. SOFTWARE REQUIREMENTS: OPERATING SYSTEM OR MONITOR UNDER WHICH PROGRAM IS EXECUTED
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14. ANY OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:  The  current version of DLC-18 is dated August 1972.
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15. NAME AND ESTABLISHMENT OF AUTHOR: Oak Ridge National Laboratory
Oak Ridge, Tennessee, U.S.A
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16. MATERIAL AVAILABLE
DLC-0018/01
File name File description Records
DLC0018_01.001 100-GRP NEUTRON X-SEC LIBRARY FOR NA, AL 4152
DLC0018_01.002 ANISN LIBRARY ROUTINE (SOURCE PROGRAM) 140
DLC0018_01.003 ANISN LIBRARY ROUTINE SAMPLE PROBLEM DD-CARD 4
DLC0018_01.004 ANISN LIBRARY ROUTINE SAMPLE PROBLEM OUTPUT 8
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17. CATEGORIES
  • C. Static Design Studies
  • Z. Data.

Keywords: absorption, cross sections, data, elastic scattering, inelastic scattering, multigroup, neutrons, sodium.