last modified: 21-AUG-1991 | catalog | categories | new | search |

DLC-0093 ZZ-SKYPORT.

ZZ SKYPORT, Importance Function for Neutron and Gamma for Skyshine Dose from Accelerator

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1. NAME OR DESIGNATION OF PROGRAM:  ZZ-SKYPORT.
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2. COMPUTERS
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Program name Package id Status Status date
ZZ-SKYPORT DLC-0093/01 Tested 21-AUG-1991

Machines used:

Package ID Orig. computer Test computer
DLC-0093/01 IBM PC PC-80286
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3. DESCRIPTION OF PROGRAM OR FUNCTION


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  FORMAT: --

  NUMBER OF GROUPS: --

  NUCLIDES: Air (79%N,21%O),Ground (silicon dioxide with 5% water)

  ORIGIN: Calculations of Alsmiller, Barish and Childs

  WEIGHTING SPECTRUM: --

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The important functions are used to calculate the skyshine dose by integrating the product of the source and importance over source direction and energy. The source may be a function of energy and polar angle but must have azimuthal symmetry. Typical sources are accelerators.
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4. METHOD OF SOLUTION

The data are from calculations of Alsmiller, Barish, and Childs using the DOT and GRTUNCL codes. The neutron data are presented in 4 tables for neutrons up to 400 MeV at distances from 11 m to 1005 m. The photon data are given at the same distances for photons up to 14 MeV. The units in the tables are in sieverts per source particle, whereas the original tables were published with units of rem per source particle. Air was taken to be composed of 79% nitrogen and 21% oxygen and to have a density of 1.20 x 10-3 g/cm3. Ground was assumed to be silicon dioxide with 5% water by weight and to have a density of 1.8 g/cm3.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM:
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6. TYPICAL RUNNING TIME:
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7. UNUSUAL FEATURES OF THE PROGRAM:
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8. RELATED AND AUXILIARY PROGRAMS

These importance functions were developed in conjunction with calculations at Oak Ridge National Laboratory in support of the 400-GeV proton accelerator which was partially built at Brookhaven National Laboratory in the early 1980s.
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9. STATUS
Package ID Status date Status
DLC-0093/01 21-AUG-1991 Tested at NEADB
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10. REFERENCES

- R.G. Alsmiller, J. Barish, and R.L. Childs:
  "Skyshine at Neutron Energies Less Than 400 MeV"
  Particle Accelerators, 11, 131-141 (1981).
DLC-0093/01, included references:
- R.G. Alsmiller, J. Barish, and R.L. Childs:
  "Skyshine at Neutron Energies Less Than 400 MeV"
  ORNL/TM-7512 Oak Ridge National Laboratory (October 1980).
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11. MACHINE REQUIREMENTS:
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12. PROGRAMMING LANGUAGE(S) USED
No specified programming language
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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED:
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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:
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15. NAME AND ESTABLISHMENT OF AUTHORS

Contributed by: Radiation Safety Information Computational Center
                Oak Ridge National Laboratory
                Oak Ridge, Tennessee, U. S. A.

Developed by:   Continuous Electron Beam Accelerator Facility
                Newport News, Va., U. S. A.
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16. MATERIAL AVAILABLE
DLC-0093/01
File name File description Records
DLC0093_01.001 SKYPORT.INF Information file 178
DLC0093_01.002 ERG.DAT Energies for neutron tables 66
DLC0093_01.003 ERG2.DAT Energies for photon tables 24
DLC0093_01.004 TABLE.B1 Neutron importance for r=11m 66
DLC0093_01.005 TABLE.B2 Neutron importance for r=108m 66
DLC0093_01.006 TABLE.B3 Neutron importance for r=495m 66
DLC0093_01.007 TABLE.B4 Neutron importance for r=1005m 66
DLC0093_01.008 TABLE.B5 Photon importance for r=11m 24
DLC0093_01.009 TABLE.B6 Photon importance for r=108m 24
DLC0093_01.010 TABLE.B7 Photon importance for r=495m 24
DLC0093_01.011 TABLE.B8 Photon importance for r=1005m 24
DLC0093_01.012 DOS file-names 11
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17. CATEGORIES
  • G. Radiological Safety, Hazard and Accident Analysis
  • Z. Data.

Keywords: doses, neutron importance function.