Download or read book Experimental Determination of Neutron Energy Spectra in Concrete Ducts written by Leonard B. Gardner and published by . This book was released on 1967 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt: Neutron energy spectra were experimentally determined at various positions in air ducts through concrete. The ducted concrete structures studied were built as model entranceways for protective shelters. The spectra were determined for the case of 14-Mev neutrons impinging on the duct entrance, and were based on activation analysis of threshold foil detectors, foil sandwiches, and bare and cadmium-covered indium foils. The experimentally determined spectra were compared to available spectra calculated by Monte Carlo techniques utilizing the ADONIS computer code. From the spectra the dose was calculated and the results were normalized to the dose in free air at one centimeter from the source. The normalized dose, as a function of distance in the duct from the source, is graphically compared for the several analysis techniques. The data presented demonstrate that it is possible to determine the neutron energy spectrum in ducts by the technique of foil activation. Such determinations are useful during the experimental optimization of the protection factor for the duct in which the inclusion of doors, traps, liners, and special wall materials are considered. The data presented herein form a basis for understanding the effect of duct geometry on the protection factor, that is, the inverse of the dose rate at various positions in the duct normalized to the dose rate at the entrance of the duct. (Author).
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1974 with total page 764 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Technical Abstract Bulletin written by Defense Documentation Center (U.S.) and published by . This book was released on 1967 with total page 784 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Guide to Technical Documents written by Naval Civil Engineering Laboratory (Port Hueneme, Calif.) and published by . This book was released on 1974 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Monthly Accession List written by Radiation Effects Information Center (Columbus, Ohio). and published by . This book was released on 1968 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government wide Index to Federal Research Development Reports written by and published by . This book was released on 1967 with total page 1062 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Navy Civil Engineer written by and published by . This book was released on 1967 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book U S Government Research Development Reports written by and published by . This book was released on 1966-11 with total page 1014 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book U S Government Research and Development Reports written by and published by . This book was released on 1965 with total page 1776 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Neutron and Gamma ray Streaming Through a Two legged Thick wall Steel Duct written by L. B. Gardner and published by . This book was released on 1968 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of the study was to determine the validity of simplified formulas for calculating the protection against streaming neutrons and gamma rays afforded by thick-wall steel ducts. The report summarizes the results of neutron and gamma-ray dose calculations by albedo techniques and the results of gamma-ray dose measurements performed for a two-legged, thick-wall steel duct. Original data are presented for (1) the Monte Carlo calculation of neutron and gamma-ray streaming; (2) survey meter measurement of neutron dose; (3) the measurement of neutron energy spectra by foil activation techniques and subsequent calculation of dose; and (4) the measurement of prompt gamma rays by a liquid scintillation detector and by pulse shape discrimination. The dose normalized to the dose at 1 centimeter in free air is a common parameter, allowing the intercomparison of the different experimental and theoretical results. The work varifies the semiemperical formulas of Song and Chapman for the calculation of normalized dose rates resulting from neutrons and gamma rays streaming through thick-wall steel ducts. It is also shown that 05R/STATEST and OGRE-G computer codes are considerably more precise than the ADONIS code for the same use of computer time. Concrete ducts are seen to offer slightly more protection than thick-wall steel ducts. (Author).
Download or read book Energy Research Abstracts written by and published by . This book was released on 1983 with total page 1226 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Publications Reports and Papers for 1966 from Oak Ridge National Laboratory written by F. M. O'Hara and published by . This book was released on 1967 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1969 with total page 1508 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Navy Civil Engineer written by and published by . This book was released on 1967 with total page 782 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Two plate Method of Measuring Fast Neutron Energy Spectra when the Direction of the Incident Neutrons Cannot be Determined written by John E. Evans and published by . This book was released on 1952 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bibliography of Scientific and Industrial Reports written by and published by . This book was released on 1965-07 with total page 1698 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book TID written by and published by . This book was released on 1952 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
