An Experimental Evaluation of the Radiation Protection Afforded by a Large Modern Concrete Office Building PDF Download
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Author: J. F. Batter
Publisher:
ISBN:
Category : Nuclear bomb shelters
Languages : en
Pages : 70
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Book Description
An experimental study was made to determine the effective shielding provided by a modern reinforced-concrete office building (AEC Headquarters building) from nuclear fallout. Pocket ionization chambers were used for measurement of the radiation-field strength. Fallout was simulated with distributed and point-source configurations of Co 60 and Ir 192 sources. Four typical sections were selected for study, and experiments were performed on each. These included an external wing with exposed basement walls and an external wing with a buried basement. Roof studies were made on an internal wing with a full basement and on the east end of wing A, which has a thin-roof construction. The thick-roof construction of 8 in. of concrete and 2 in. of rigid insulation covers all the building except the east end of wing A, which has 4 in. of concrete and 2 in. of insulation.
Author: J. F. Batter
Publisher:
ISBN:
Category : Nuclear bomb shelters
Languages : en
Pages : 70
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Book Description
An experimental study was made to determine the effective shielding provided by a modern reinforced-concrete office building (AEC Headquarters building) from nuclear fallout. Pocket ionization chambers were used for measurement of the radiation-field strength. Fallout was simulated with distributed and point-source configurations of Co 60 and Ir 192 sources. Four typical sections were selected for study, and experiments were performed on each. These included an external wing with exposed basement walls and an external wing with a buried basement. Roof studies were made on an internal wing with a full basement and on the east end of wing A, which has a thin-roof construction. The thick-roof construction of 8 in. of concrete and 2 in. of rigid insulation covers all the building except the east end of wing A, which has 4 in. of concrete and 2 in. of insulation.
Author: Z. Burson
Publisher:
ISBN:
Category : Dwellings
Languages : en
Pages : 28
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Book Description
An experimental study was conducted to determine the fallout-radiation protection afforded by a residence representative of a type of construction much in favor in the Southwest: a single-story stucco and frame house with a heavy shake roof and no basement. This study was one of many such studies sponsored by Civil Effects Test Operations, Division of Biology and Medicine, U. S. Atomic Energy Commission, for the purpose of evaluating the protection presently afforded by ordinary homes and structures against the dangers of fallout radiation. The protection afforded by the home was determined by simulating a fallout-radiation field above and immediately surrounding the house and measuring the radiation level within. The radiation field was simulated by pumping a sealed Co(60) source through a long length of tubing evenly distributed over the test area. Highly sensitive dose-integrating ionization chambers were used to measure the radiation level inside the structure. The test was performed rapidly, easily, and safely. Valid statistical data were obtained even though the radiation level was of such low magnitude that it was unnecessary to evacuate any of the neighboring homes. The protection factors within the house (ratio of exposure dose rate in the open field to exposure dose rate in the structure) ranged from 2.8 to 4.4, depending on the location. The results compare favorably with those found in previous exercises under similar conditions.
Author: Zolin G. Burson
Publisher:
ISBN:
Category : Civil defense
Languages : en
Pages : 48
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Book Description
A study was undertaken to determine the protection against fallout radiation provided by an earth-covered shelter. The study indicated that the shelter offered excellent protection from fallout radiation deposited on and around the shelter. This study also added additional data to the research in radiation shielding provided by various structures which is being conducted by the Civil Effects Test Operations, Division of Biology and Medicine, U.S. Atomic Energy Commission. A fallout radiation field was simulated by pumping, at constant speed, a sealed Co60 source through a long length of tubing which was evenly distributed over an area. Radiation measurements were made Inside the shelter by dose-integrating ionization chambers. In general, the results indicated that the protection factor (ratio of the open-field exposure dose rate to the exposure dose rate in the structure) was approximately 5000 in the center of the shelter, increasing to 10,000 to 15,000 along the sides, and decreasing to about 3000 near the ends. Directly below vents the protection factor was found to be approximately 2500 at the 3-ft level. The shelter was a half-round corrugated-steel structure covered by a minimum of approximately 2 ft of earth on the top and 5 to 7 ft of earth on the sides.
Author: Charles Eisenhauer
Publisher:
ISBN:
Category : Building
Languages : en
Pages : 32
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Book Description
The report is a discussion of the technical assumptions underlying the methods currently recommended by the Office of Civil Defense (OCD) for calculating protection afforded by structures against fallout radiation.It discusses methods for calculating the contributions from radioactive sources on the roof and on the ground surrounding a simple one-storied building.It shows in detail how each technical chart in the OCD Professional Manual is derived from basic data on radiation penetration developed by Dr. L. V. Spencer.Charts from the Professional Manual and relevant curves from Spencer's work are included.(Author).
Author: Zolin G. Burson
Publisher:
ISBN:
Category : Cobalt
Languages : en
Pages : 130
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Book Description
Author: Zolin G. Burson
Publisher:
ISBN:
Category :
Languages : en
Pages : 84
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Book Description
Author: R. L. French
Publisher:
ISBN:
Category : Fast neutrons
Languages : en
Pages : 32
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Book Description
The experiment provided confirmation, both qualitative and quantitative, of the "first-last collision model" of the air-ground interface effect.
Author: Zolin G. Burson
Publisher:
ISBN:
Category : Cobalt
Languages : en
Pages : 68
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Book Description
Author:
Publisher:
ISBN:
Category : Physics
Languages : en
Pages : 44
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Book Description
Author: Lewis E. Vogler
Publisher:
ISBN:
Category : Antennas (Electronics).
Languages : en
Pages : 368
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Book Description
Graphs of the change in input impedance of electrically short dipole antennas in the presence of an isotropic and homogeneous ground are presented, considering four types of antennas: horizontal and vertical, electric and magnetic dipoles.Curves of the change in both the input resistance and reactance are shown for a wide range of values of the frequency, antenna height above the ground, and electromagnetic ground constants.(Author).
