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NEA-0188 BIGGI-4T.

BIGGI-4T, Gamma Transport in Multi-Region Shield in Planar or Spherical Geometry

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1. NAME OR DESIGNATION OF PROGRAM:   BIGGI-4T.
(Boltzmans integralgleichung fuer Gamma-Intensitaeten, version 4,
with tapes), abbreviated B4T.
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2. COMPUTERS
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Program name Package id Status Status date
BIGGI-4T NEA-0188/02 Tested 20-AUG-1998

Machines used:

Package ID Orig. computer Test computer
NEA-0188/02 IBM 360 series IBM 360 series
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3. NATURE OF PHYSICAL PROBLEM SOLVED

Boltzmann's transport equation (in integral form) is solved numerically for gamma rays in plane or spherical geometry.
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4. METHOD OF SOLUTION

Each of the three dimensions (space, energy, angle) is described by a mesh point set, and the integrals in the transport equation are approximated by sums.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

At most 51 energy groups, 9 angular mesh points, 9 materials, 9 regions, 30 elements in the library, 9 source energies, 6 wavelength steps, 4 arbitrary response functions. Upper limit for spatial points is 39 in the version for the IBM 7090 and 90 in that for the IBM 360/65.
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6. TYPICAL RUNNING TIME

On the IBM 7090 (if no tapes are used) about  20-30 sec per spatial point.
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7. UNUSUAL FEATURES OF THE PROGRAM

The exponential transformation allows the choice of large spatial steps in thick source-free shield regions, up to about 2 mfp, so a shield 20 mfp thick can be calculated in a time of about 5 min on the IBM 7090, and in much less on the IBM 360/65.
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8. RELATED AND AUXILIARY PROGRAMS

B4T is an extension of B3P (both described in EUR 3555E). Auxiliary programmes are not used.
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9. STATUS
Package ID Status date Status
NEA-0188/02 20-AUG-1998 Tested at NEADB
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10. REFERENCES:
NEA-0188/02, included references:
- Hans Penkuhn:
  Users Manual for the Gamma Transport Codes BIGGI 3P and BIGGI 4T.
  (for further references see p. 63, refs. 1, 2 9a and 9b).
  EUR 3555e (1967).
- U. Canali et al.:
  Research on Radiation Shielding
  Reprint from EUR 1643e.
- Hans Penkuhn:
  For Further Development of the Gamma Transport Code BIGGI4
  (in German)
- Reprint ATKE 12-12 (81-84) 1967.
- H. Penkuhn
"BIGGI A Generalized Gamma Transport Program"
Informal notes
- H. Penkuhn
"A Numerical Solution of the Boltzmann Equation Applied
to Concrete Slabs"
EUR 2488.e (1965)
- H.Penkuhn
"Provisory Description of the gamma Transport Program BIGGI 3 P"
Informal notes.
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11. MACHINE REQUIREMENTS

For the IBM-7090-version:32-k-core, 4 scratch tapes. For the IBM-360/65-version:512-k-core (in bytes), 4 scratch tapes or disks. The standard input-output equipment is used.
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
NEA-0188/02 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

Since no overlay is used, a change to other operating systems is not difficult.
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15. NAME AND ESTABLISHMENT OF AUTHOR

           Hans Penkuhn
           Commission des Communautes Europeenes
           21020 - Ispra (Varese) Italy
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16. MATERIAL AVAILABLE
NEA-0188/02
File name File description Records
NEA0188_02.001 SOURCE & DATA 360/65 1184
NEA0188_02.002 OUTPUT 910
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17. CATEGORIES
  • J. Gamma Heating and Shield Design

Keywords: gamma radiation, r-theta-z, shielding, transport theory, x-y.