Computer Programs
NEA-0953 TRANSHEX.
last modified: 23-MAR-1994 | catalog | categories | new | search |

NEA-0953 TRANSHEX.

TRANSHEX, 2-D Thermal Neutron Flux Distribution from EpiThermal Flux in Hexagonal Geometry

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1. NAME OR DESIGNATION OF PROGRAM:  TRANSHEX.
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2. COMPUTERS
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Program name Package id Status Status date
TRANSHEX NEA-0953/01 Tested 23-MAR-1994

Machines used:

Package ID Orig. computer Test computer
NEA-0953/01 UNIVAC 1108 DEC VAX 6000
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3. DESCRIPTION OF PROGRAM OR FUNCTION

TRANSHEX is a multigroup integral transport program that determines the thermal scalar flux distribution arising from a known epithermal flux in two- dimensional hexagonal geometry.
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4. METHOD OF SOLUTION

The program solves the isotropic collision pro- bability equations for a region-averaged scalar flux by an iterative method. Either a successive over-relaxation or an inner-outer iteration technique is applied. Flat flux collision probabilities between trigonal space regions with white boundary condition are utilized. The effect of epithermal flux is taken into consideration  as a slowing-down source that is calculated for a given spatial distribution and 1/E energy dependence of the epithermal flux.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM:
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6. TYPICAL RUNNING TIME:
NEA-0953/01
NEA-DB ran the test case included in this package on a  DEC VAX-6000 computer in 9 seconds of CPU time.
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7. UNUSUAL FEATURES OF THE PROGRAM:
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8. RELATED AND AUXILIARY PROGRAMS:
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9. STATUS
Package ID Status date Status
NEA-0953/01 23-MAR-1994 Tested at NEADB
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10. REFERENCES:
NEA-0953/01, included references:
- E. Patrakka:
  TRANSHEX - A Two-Dimensional Multigroup Collision Probability
  Computer Program for Hexagonal Geometry.
  N.E.L., Report 3  (June 1983)
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11. MACHINE REQUIREMENTS:
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
NEA-0953/01 FORTRAN-V (UNIVAC)
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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED:
NEA-0953/01
VAX/VMS V5.5-2.
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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:
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15. NAME AND ESTABLISHMENT OF AUTHORS

     E. Patrakka
     Nuclear Engineering Laboratory
     Technical Research Centre
     Otaniemi, Finland
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16. MATERIAL AVAILABLE
NEA-0953/01
File name File description Records
NEA0953_01.001 Information file 51
NEA0953_01.002 JCL and control information 8
NEA0953_01.003 TRANSHEX FORTRAN 77 source program 2317
NEA0953_01.004 Sample problem input (by NEA-DB) 136
NEA0953_01.005 TRANSHEX FORTRAN original source program 2404
NEA0953_01.006 Original sample problem input (from report) 109
NEA0953_01.007 Sample problem output 1135
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17. CATEGORIES
  • C. Static Design Studies

Keywords: epithermal neutrons, flux distribution, hexagonal configuration, multigroup, neutron transport equation, thermal neutrons, transport theory, two-dimensional.