Author: J. M. Chapman
Publisher:
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).
Dose Measurements of Gamma Radiation Streaming Through Concrete Ducts with and Without Lead Liners and Through Corrugated Steel Ducts
Author: J. M. Chapman
Publisher:
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).
Publisher:
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).
Guide to Technical Documents
Author: Naval Civil Engineering Laboratory (Port Hueneme, Calif.)
Publisher:
ISBN:
Category : Bibliographical services
Languages : en
Pages : 374
Book Description
Publisher:
ISBN:
Category : Bibliographical services
Languages : en
Pages : 374
Book Description
Technical Abstract Bulletin
Nuclear Science Abstracts
An Empirical Formula for Calculating Gamma-ray Dose Attenuation in Concrete Ducts
Author: W. C. Ingold
Publisher:
ISBN:
Category : Air ducts
Languages : en
Pages : 82
Book Description
Publisher:
ISBN:
Category : Air ducts
Languages : en
Pages : 82
Book Description
U.S. Government Research & Development Reports
Measurements and Analysis of Gamma-ray Streaming Through Concrete Lined Ducts
Author: David Lee Stucker
Publisher:
ISBN:
Category : Gamma rays
Languages : en
Pages : 420
Book Description
Publisher:
ISBN:
Category : Gamma rays
Languages : en
Pages : 420
Book Description
U. S. Government Research and Development Reports
Bibliography of Scientific and Industrial Reports
Scattering of Cobalt-60 Gamma Radiation in Air Ducts
Author: Charles Eisenhauer
Publisher:
ISBN:
Category : Air ducts
Languages : en
Pages : 30
Book Description
The exposure dose rates due to cobalt-60 gamma radiation scattered in small air ducts in concrete has been measured for ducts with one and two right angle bends. The inside corner of a right angle bend has been found to be an important source of scattered radiation. Results are analyzed in terms of solid angle relationships and attempts are made to extrapolate experimental results to other duct configurations.
Publisher:
ISBN:
Category : Air ducts
Languages : en
Pages : 30
Book Description
The exposure dose rates due to cobalt-60 gamma radiation scattered in small air ducts in concrete has been measured for ducts with one and two right angle bends. The inside corner of a right angle bend has been found to be an important source of scattered radiation. Results are analyzed in terms of solid angle relationships and attempts are made to extrapolate experimental results to other duct configurations.