ANALYSIS AND APPLICATION OF SHIELDING AND PROTECTION FACTOR RESEARCH

A review of gamma-ray shielding information was made to determine if existing methods for computing protection factors of structures agree with experimental data and to determine areas where shielding information is incomplete. Research subject areas analyzed include: modeling techniques, basement d...

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Bibliographic Details
Main Authors: Hill, Edward L, Whitaker, Donald R, Doggett, Wesley O
Format: Report
Language:English
Subjects:
ANALYSIS
BACKSCATTERING
COMPUTER PROGRAMMING
DISTRIBUTION FUNCTIONS
DOSE RATE
EXPERIMENTAL DATA
FALLOUT
FLOORS
GAMMA RAYS
HANDBOOKS
MATHEMATICAL MODELS
MATHEMATICAL PREDICTION
MONTE CARLO METHOD
Nuclear Radiation Shield, Protection & Safety
OPTIMIZATION
RADIOACTIVE CONTAMINATION
ROOFS
SCATTERING
SHELTERS
SHIELDING
SIMULATION
STATE-OF-THE-ART REVIEWS
STRUCTURES
TERRAIN
UNDERGROUND STRUCTURES
WALLS
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Summary:A review of gamma-ray shielding information was made to determine if existing methods for computing protection factors of structures agree with experimental data and to determine areas where shielding information is incomplete. Research subject areas analyzed include: modeling techniques, basement dose rates, simulated fallout, interior partitions, ceiling shine, ground roughness, azimuthal sectors, limited strips of contamination, and non- uniform source distributions. These analyses are used to determine the status of the present protection factor computational procedures. Major findings in each subject area are included and recommendations for additional experiments and for modifications to existing computational procedures are made. Some major findings are: (1) roof contributions as predicted by Spencer's Monograph agree within 1 to 15% with full-scale experimental measurements; (2) theoretical predictions of Spencer's Monograph for basement protection factors are usually non- conservative; (3) modeling is, in general, a useful, convenient, and accurate method of obtaining fallout protection offered by first stories and upper stores of full-scale structures; (4) floor-edge scattering into a basement can be a substantial source of radiation. See also Summary, AD479582.