last modified: 01-MAY-1973 | catalog | categories | new | search |

NEA-0416 PIPE.

PIPE, 1-D Gamma Transport for Slab, Spherical Shields with Compton Scattering Calculation

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1. NAME OR DESIGNATION OF PROGRAM:  PIPE.
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2. COMPUTERS
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Program name Package id Status Status date
PIPE NEA-0416/01 Tested 01-MAY-1973

Machines used:

Package ID Orig. computer Test computer
NEA-0416/01 IBM 370 series IBM 370 series
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3. NATURE OF PHYSICAL PROBLEM SOLVED

The Boltzmann transport equation  for gamma rays is solved for a one-dimensional shield in slab or spherical shell geometry. The Compton scattering process is treated  explicitly. Photoabsorption and pair production processes are supposed to absorb the gamma energy totally.
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4. METHOD OF SOLUTION

Discrete ordinate method in energy, space, and angle. Unlike the usual Sn method, iteration in energy is avoided, and the basis is not the integro-differential form of the Boltzmann  equation, but the pair of coupled integral equations (the so-called  third form of the Boltzmann equation, in the terms of Weinberg and Wigner).
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

20 materials, 11 angular and 51 spatial mesh points, 60 energy groups.
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6. TYPICAL RUNNING TIME

On an IBM 370/165 about 1 to 2 minutes for a normal shielding calculation.
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7. UNUSUAL FEATURES OF THE PROGRAM

An exponential transformation allows in source-free media spatial integration steps up to 2 or 3 mean free paths. The use of the integral form of the Boltzmann equation where the exponential shows up explicitly, avoids all negative angular fluxes.
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8. RELATED AND AUXILIARY PROGRAMS:  PIPE supersedes BIGGI-3P and BIGGI-4T.
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9. STATUS
Package ID Status date Status
NEA-0416/01 01-MAY-1973 Tested at NEADB
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10. REFERENCES

- H. Penkuhn:
  User's Manual for the Gamma Transport Codes BIGGI 3P and BIGGI 4T EUR 3555 E (1967)
- H. Penkuhn:
  How To Use the Gamma Transport Code PIPE
  EUR 4624 E (1970)
NEA-0416/01, included references:
- PIPE Draft Report
- H. Penkuhn:
  How to use the Gamma Transport Code PIPE
  (April 1970)
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11. MACHINE REQUIREMENTS:  512k bytes of core storage. No auxiliary storage.
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
NEA-0416/01 FORTRAN-IV
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13. OPERATING SYSTEM OR MONITOR UNDER WHICH PROGRAM IS EXECUTED:  Standard.
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14. ANY OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:  Standard. No overlay or similar complications.
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15. NAME AND ESTABLISHMENT OF AUTHOR

   Hans Penkuhn
   C.C.R. EURATOM
   Ispra Establishment, Italy
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16. MATERIAL AVAILABLE
NEA-0416/01
File name File description Records
NEA0416_01.001 SOURCE PROGRAMME (FORTRAN) 1216
NEA0416_01.002 SAMPLE INPUT 226
NEA0416_01.003 SAMPLE OUTPUT 2934
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17. CATEGORIES
  • J. Gamma Heating and Shield Design

Keywords: discrete ordinate method, gamma radiation, one-dimensional, shells, shielding, slabs, spheres, transport theory.