Accession Number : AD0769711

Title :   In-and-Down Scattered Radiation in a Simple Concrete Structure.

Descriptive Note : Final rept.,

Corporate Author : BALLISTIC RESEARCH LABS ABERDEEN PROVING GROUND MD

Personal Author(s) : Schmoke,Murray A.

Report Date : SEP 1973

Pagination or Media Count : 151

Abstract : Measurements were made of the radiation scattered in the aboveground wall and down to a detector in a basement of a simple concrete structure in a fallout radiation field simulated by a circulating point source of cobalt-60. The structure was so constructed that parameters such as aboveground wall height, wall thickness, basement ceiling thickness and aboveground roof thickness, could be varied. The results of these measurements were converted to reduction factors (ratio of the measured exposure rate within the structure to the free-field exposure rate at a 3 foot height above an infinite field) and compared with results predicted by the Engineering Method and the Engineering Method as revised by Eisenhauer. Where applicable, the results were also converted to basement ceiling attenuation factors (ratio of the exposure rate at a basement position with ceiling emplaced to the exposure rate at the same position without the basement ceiling) and compared with the empirically derived Eisenhauer formulation, for (B sub c) (X sub c) omega, the basement ceiling attenuation factor. (Modified author abstract)

Descriptors :   (*RADIATION SHIELDING, *CONCRETE), (*FALLOUT, *RADIATION PROTECTION), UNDERGROUND STRUCTURES, ATTENUATION, RADIATION MEASURING INSTRUMENTS, COMPUTATIONS, TABLES(DATA), CIVIL DEFENSE

Subject Categories : Civil Defense
      Nuclear Radiation Shield, Protection & Safety
      Radioactiv, Radioactive Wastes & Fission Prod

Distribution Statement : APPROVED FOR PUBLIC RELEASE