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DLC-0188 ZZ-SKYDATA-KSU.

ZZ SKYSDATA-KSU, Neutron and Gamma Skyshine Responses

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1. NAME OR DESIGNATION OF PROGRAM:  ZZ-SKYDATA-KSU.
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2. COMPUTERS
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Program name Package id Status Status date
ZZ-SKYDATA-KSU DLC-0188/01 Tested 24-NOV-2000

Machines used:

Package ID Orig. computer Test computer
DLC-0188/01 IBM PC PC Pentium III 500,Linux-based PC,IBM RISC6000 WS
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3. HISTORICAL BACKGROUND AND INFORMATION

The integral line-beam skyshine method is an effective and efficient method for performing  both gamma-ray and neutron skyshine calculations for sources that are small compared to the source-to-detector distance. Critical to this method is the availability of skyshine response functions which are usually approximated by an empirical formula whose parameters are obtained by fits to accurate evaluations of the response functions. This library provides revised parameters for approximations of line-beam and conical-beam skyshine response functions for both gamma-ray and neutron sources. These new compilations allow the response functions to be evaluated with greater accuracy over greater energy ranges and over greater source-to-detector distances than do previous approximations. Moreover, the neutron and secondary-photon response functions are expressed for the first time in modern dosimetric units. Finally, approximations are provided to allow correction of the neutron conical beam response functions for the effect of the air-ground interface.
The data in this library are intended for use in calculations of skyshine doses from point gamma-ray and neutron sources with the integral line-beam method. The CCC-0646/SKYSHINE-KSU package includes these data and a series of such calculational codes (SKYDOSE, SKYNEUT, McSKY) that can directly use these data for simple geometries. These data can be used in specialized codes for sources with more complex geometries or to estimate the effect of the air-ground interface.
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4. SOURCE AND SCOPE OF DATA

Data in this library have been obtained by fitting the response function approximations to values of the response functions calculated, for the most part, by the MCNP code.  Line-beam data are presented for gamma-ray and neutron sources, the  latter including neutron and secondary-photon components. Conical-beam data are also provided for neutron sources with azimuthal symmetry. Source gamma rays may have energies between 0.02 and 100 MeV, and source neutrons may have energies between 0.01 and  14 MeV. The maximum source-to-detector distance is 3000 m for gamma  photons below 10 MeV and 1500 m for photons between 10 and 100 MeV.  Data for neutron response functions are valid to 2500 m. Skyshine doses for photon sources are expressed in air-absorbed rad while doses for neutron sources are in dose equivalent. Specifically, the  following three dose equivalents (Sv/neutron) are used: (1) the effective dose equivalent for AP irradiation of an anthropomorphic phantom, (2) the dose equivalent at 10 mm into the ICRU sphere for isotropic (ISO) irradiation, and (3) the dose equivalent on the principal axis at 10 mm depth for irradiation of the ICRU sphere by  a plane parallel beam (PAR). Fluence-to-dose conversion factors are  from ICRP Report 51, but do *not* include the factor of 2 increase in the neutron quality factor recommended at the 1985 Paris meeting  of the ICRP.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM:
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6. TYPICAL RUNNING TIME:  Not applicable.
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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
DLC-0188/01 24-NOV-2000 Tested at NEADB
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10. REFERENCES

- J.K. Shultis et al.:
  Approximate Beam Response Functions for Gamma-Ray and Neutron
  Skyshine Analysis
  EES Report 217, Engineering Experiment Station, Kansas State
  University, Manhattan, Kansas, 1995
- J.S. Shultis et al.:
Extensions to the Integral Line-Beam Method for Gamma-Ray Skyshine    Analyses
  Report SAND94-2019, Sandia National Laboratory, Albuquerque,
  New Mexico, 1995
- A.A. Gui et al.:
  Response Functions for Neutron Skyshine Analysis, submitted to
  Nucl. Sci. Eng., 1995
DLC-0188/01, included references:
- J.K. Shultis et al.:
  Approximate Beam Response Functions for Gamma-Ray and Neutron
  Skyshine Analysis
  KSU Report 271 (June 1995)
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11. MACHINE REQUIREMENTS:
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12. PROGRAMMING LANGUAGE(S) USED

No item found

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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED:  All data are in standard ASCII files.
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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:
                Kansas State University
                Manhattan
                Kansas, U.S.A.
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16. MATERIAL AVAILABLE
DLC-0188/01
miscellaneous    mag tapeREADME.DOC Information file                MISTP
test-case data   mag tapeGCFN1.DAT Param. for neutron GCF_n1        DATTP
test-case data   mag tapeGCFN1.TBL Param. for neutron GCF_n1        DATTP
test-case data   mag tapeGCFN2.DAT Param. for neutron GCF_n2        DATTP
test-case data   mag tapeGCFN2.TBL Param. for neutron GCF_n2        DATTP
test-case data   mag tapeGCFSG.DAT Param. for secondary gamma GCF_p DATTP
test-case data   mag tapeGCFSG.TBL Param. for secondary gamma GCF_p DATTP
test-case data   mag tapeLOWGAM Gamma LBRF E=0.02 to 15 MeV         DATTP
test-case data   mag tapeHIGHGAM Gamma LBRF E=20 to 100 MeV         DATTP
test-case data   mag tapeLBNEDE.DAT n LBRF EDE anthropomorph phantomDATTP
test-case data   mag tapeLBNEDE.TBL n LBRF EDE anthropomorph phantomDATTP
test-case data   mag tapeLBNDEP.DAT n LBRF dose - beam on ICRU sph. DATTP
test-case data   mag tapeLBNDEP.TBL n LBRF dose - beam on ICRU sph. DATTP
test-case data   mag tapeLBNDEI.DAT n LBRF DE 10mm in the ICRU sph. DATTP
test-case data   mag tapeLBNDEI.TBL n LBRF DE 10mm in the ICRU sph. DATTP
test-case data   mag tapeLBGEDE.DAT sec-gamma LBRF EDE anthrop. ph. DATTP
test-case data   mag tapeLBGEDE.TBL sec-gamma LBRF EDE anthrop. ph. DATTP
test-case data   mag tapeLBGDEP.DAT sec-gamma LBRF DE beam ICRU sph.DATTP
test-case data   mag tapeLBGDEP.TBL sec-gamma LBRF DE beam ICRU sph.DATTP
test-case data   mag tapeLBGDEI.DAT sec-gamma LBRF DE 10mm ICRU sph.DATTP
test-case data   mag tapeLBGDEI.TBL sec-gamma LBRF DE 10mm ICRU sph.DATTP
test-case data   mag tapeCBNEDE.DAT n CBRF EDE anthropomorph phantomDATTP
test-case data   mag tapeCBNEDE.TBL n CBRF EDE anthropomorph phantomDATTP
test-case data   mag tapeCBNDEP.DAT n CBRF dose - beam on ICRU sph. DATTP
test-case data   mag tapeCBNDEP.TBL n CBRF dose - beam on ICRU sph. DATTP
test-case data   mag tapeCBNDEI.DAT n CBRF DE 10mm in the ICRU sph. DATTP
test-case data   mag tapeCBNDEI.TBL n CBRF DE 10mm in the ICRU sph. DATTP
test-case data   mag tapeCBGEDE.DAT sec-gamma CBRF EDE anthrop. ph. DATTP
test-case data   mag tapeCBGEDE.TBL sec-gamma CBRF EDE anthrop. ph. DATTP
test-case data   mag tapeCBGDEP.DAT sec-gamma CBRF DE beam ICRU sph.DATTP
test-case data   mag tapeCBGDEP.TBL sec-gamma CBRF DE beam ICRU sph.DATTP
test-case data   mag tapeCBGDEI.DAT sec-gamma CBRF DE 10mm ICRU sph.DATTP
test-case data   mag tapeCBGDEI.TBL sec-gamma CBRF DE 10mm ICRU sph.DATTP
report                   KSU Report 271 (June 1995)                 REPPT
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17. CATEGORIES
  • G. Radiological Safety, Hazard and Accident Analysis
  • Z. Data.

Keywords: air scattering, data library, gamma radiation, neutrons, response functions.