Accession Number : AD0613190

Title :   PENETRATION OF NEUTRON AND GAMMA RADIATION THROUGH THE OPENINGS OF UNDERGROUND STRUCTURES,

Corporate Author : RADIATION RESEARCH ASSOCIATES INC FORT WORTH TEX

Personal Author(s) : French,R. L. ; Wells,M. B. ; Schaeffer,N. M.

Report Date : 30 NOV 1964

Pagination or Media Count : 136

Abstract : Calculations were performed of the radiation intensities in open concrete-lined cylindrical holes and in open concrete bunkers due to a fission source located in air at distances of 100 to 700 feet. The calculations are part of an analysis of experiments performed with the Tower Shielding Reactor II (TSR-II) at Oak Ridge National Laboratory which included numerous radiation measurements in the underground structures with and without shields over the openings. The approach followed in the calculations was to determine, from geometric considerations, the portion of the incident radiation intensities which could enter the structures. Methods were developed to account for effects of the air-ground interface and albedo models were devised to simplify calculation of wall-scattering and production of secondary radiation in the walls. In general the calculated and measured data agree within approximately 25 percent. (Author)

Descriptors :   (*UNDERGROUND STRUCTURES, RADIOACTIVITY), (*RADIATION MEASURING INSTRUMENTS, UNDERGROUND STRUCTURES), GAMMA RAYS, NEUTRONS, NUCLEAR PARTICLES, FAST NEUTRONS, THERMAL NEUTRONS, SHIELDING, CONCRETE, SCATTERING, FISSION, ALBEDO, DOSE RATE, DOSIMETERS, CYLINDRICAL BODIES, MATHEMATICAL MODELS, GRAPHICS, TABLES(DATA)

Distribution Statement : APPROVED FOR PUBLIC RELEASE