FAST-NEUTRON STREAMING THROUGH CONCRETE DUCTS. THEORETICAL CALCULATIONS USING THE ALBEDO CONCEPT COMPARED WITH EXPERIMENTAL RESULTS.
Abstract
As a part of studies of shielding for personnel shelters, fast-neutron streaming through two-legged rectangular air ducts in concrete was investigated theoretically and experimentally. In the theoretical study of the problem, the albedo concept was employed, and numerical values of neutron dose in the second leg of ducts of various sizes were computed by IBM 1620 computer. Neutron sources employed were T(d,n)He4 reaction (14Mev), D(d,n)He3 reaction (2.5Mev), and Plutonium-Beryllium. Three sizes of concrete ducts were used as models: (1) 3 x 3 feet with a first-leg length of 15 feet; (2) 2 x 3 feet with a 12-foot first leg; and (3) 2 x 2 feet with a 12-foot first leg. In experiments, counting rates of a spherical dosimeter were measured in both the first and second legs of the ducts described for the neutron sources named. Comparisons show very good agreement between theoretical and experimental results. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1968
- Accession Number
- AD0665003
Entities
People
- Yo Taik Song
Organizations
- Naval Facilities Engineering Service Center