Author: Jan L. KloostermanPublisher:
ISBN: 9789073861077
Category :
Languages : en
Pages : 156
Book Description
On gamma ray shielding and neutron streaming through ducts
Author: Jan L. KloostermanPublisher:
ISBN: 9789073861077
Category :
Languages : en
Pages : 156
Book Description
Neutron and Gamma-ray Streaming Through a Two-legged, Thick-wall Steel Duct
Author: L. B. GardnerPublisher:
ISBN:
Category :
Languages : en
Pages : 25
Book Description
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).
Monte Carlo Calculations of Gamma-ray Streaming Through Coplanar and Noncoplanar Ducts
Author: Leonard B. GardnerPublisher:
ISBN:
Category :
Languages : en
Pages : 30
Book Description
The agreement between the Monte Carlo method and previous experiments supports the validity of using the Monte Carlo method to simulate the behavior of gamma rays in ducts.
Measurements and Analysis of Gamma-ray Streaming Through Concrete Lined Ducts
Author: David Lee StuckerPublisher:
ISBN:
Category : Gamma rays
Languages : en
Pages : 420
Book Description
Gamma-ray Streaming Through Ducts
Author: C. M. HuddlestonPublisher:
ISBN:
Category :
Languages : en
Pages : 56
Book Description
A survey is presented of the current status of experimental and theoretical investigations of the problem of gamma-ray streaming through air ducts in concrete. Data are tabulated and plotted for a variety of experiments. Comparisons are made between theory and experiment, inconsistencies are pointed out, and areas needing further investigation are indicated.
An Empirical Formula for Calculating Gamma-ray Dose Attenuation in Concrete Ducts
Author: W. C. IngoldPublisher:
ISBN:
Category : Air ducts
Languages : en
Pages : 82
Book Description
Shielding Against Gamma Rays, Neutrons, and Electrons from Nuclear Weapons
Author: John Howard HubbellPublisher:
ISBN:
Category : Radioactive fallout
Languages : en
Pages : 48
Book Description
Dose Measurements of Gamma Radiation Streaming Through Concrete Ducts with and Without Lead Liners and Through Corrugated Steel Ducts
Author: J. M. ChapmanPublisher:
ISBN:
Category :
Languages : en
Pages : 32
Book Description
Dosimeter measurements were taken in a 3-foot-square, two-legged concrete duct, with and without the presence of lead sheets covering the basic scattering areas in the corner, to determine the effectiveness of lead sheeting in reducing gamma radiation. For Co60 radiation, the lead sheets reduced the dose rate in the second leg of the duct down to 46% of the dose rate measured in the second leg of the duct without lead sheets, and for Cs137 radiation the reduction was down to 36%. Calculations were made to determine the effectiveness of the sheets in different size ducts, and comparisons were made with other methods for reducing radiation. Measured attenuation factors for a circular, thin-walled, corrugated steel duct were compared to values calculated by a simple computer program for a square, thick-walled steel duct. It appears that the computer code can be used to approximate attenuation factors for a corrugated steel duct. (Author).
Modeling of Gamma Rays Streaming Through Straight Rectangular Ducts
Author: Kyle Richard ThompsonPublisher:
ISBN:
Category : Gamma rays
Languages : en
Pages : 292
Book Description
Author: