ANALYSIS OF RADIATION STREAMING THROUGH SINGLE-BEND DUCTS.
Rept. for 1 Oct 63-30 Sep 64,
GENERAL DYNAMICS/FORT WORTH TEX
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An experimental study has been performed to obtain data for verification of the Monte Carlo Multibend-Duct Procedure and to obtain data for a parametric study of radiation transported through a ducted shield. To accomplish these objectives, a 14-Mev neutron source and Co60 gamma-ray sources have been used in conjunction with single-bend aluminum ducts in water shields. The duct bends were varied from 30 to 60 degrees and the topleg-to-bottom-leg ratio from 0.3 to 3.0. The calculation procedure has been verified within certain limitations, which were mainly a function of shield thickness. Experimental results were integrated over the exit plane of the ducted shields. The scattered component of the dose rate was obtained by subtraction of the calculated directbeam component from the integrated experimental dose rates. The scattered component was 70 to 90 percent of the total radiation dose and increased with increasing shield thickness. No other general tendencies were noted over the range of the parameters considered. Author