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Office of Scientific and Technical Information
 

Computational techniques in gamma-ray skyshine analysis

Technical Report ·
DOI:https://doi.org/10.2172/6077591· OSTI ID:6077591

Two computer codes were developed to analyze gamma-ray skyshine, the scattering of gamma photons by air molecules. A review of previous gamma-ray skyshine studies discusses several Monte Carlo codes, programs using a single-scatter model, and the MicroSkyshine program for microcomputers. A benchmark gamma-ray skyshine experiment performed at Kansas State University is also described. A single-scatter numerical model was presented which traces photons from the source to their first scatter, then applies a buildup factor along a direct path from the scattering point to a detector. The FORTRAN code SKY, developed with this model before the present study, was modified to use Gauss quadrature, recent photon attenuation data and a more accurate buildup approximation. The resulting code, SILOGP, computes response from a point photon source on the axis of a silo, with and without concrete shielding over the opening. Another program, WALLGP, was developed using the same model to compute response from a point gamma source behind a perfectly absorbing wall, with and without shielding overhead. 29 refs., 48 figs., 13 tabs.

Research Organization:
Kansas Engineering Experiment Station, Manhattan (USA)
DOE Contract Number:
AC05-76OR00033
OSTI ID:
6077591
Report Number(s):
DOE/OR/00033-T417; ON: DE89010156
Country of Publication:
United States
Language:
English

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Related Subjects

500300* -- Environment
Atmospheric-- Radioactive Materials Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
99 GENERAL AND MISCELLANEOUS
990220 -- Computers
Computerized Models
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COMPUTER CODES
COMPUTERIZED SIMULATION
DOSIMETRY
EARTH ATMOSPHERE
ELECTROMAGNETIC RADIATION
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MONITORING
NUCLEAR FACILITIES
NUCLEAR POWER
POWER
RADIATION MONITORING
RADIATION PROTECTION
RADIATIONS
RADIOACTIVE WASTE FACILITIES
S CODES
SCATTERING
SIMULATION
W CODES