Abstract
Detailed neutron flux measurements have been performed in a 48 cm thick configuration of thin regions of Fe and D{sub 2}O (30 % of total thickness Fe), both when the Fe regions are massive and when they are penetrated by 15 cm dia. D{sub 2}O channels. It was found that the total leakage of neutrons through the configuration was increased by 25 % in the latter case. It is shown that this increase and the detailed flux distribution on a duct axis can be satisfactorily predicted by a one-dimensional shielding code when the duct is calculated as a pure D{sub 2}O layer and a radial buckling term is used for the < 1 eV neutrons when penetrating the Fe regions. Another calculation through the massive part of Fe is to be performed in the usual way. It is believed that this 2-component method is usable in a wider range of similar configurations, A calculation with regions where the Fe and the D{sub 2}O ducts have been homogenized into a single material overestimates the increase in leakage, and the relative error is greater than that in the 2-component calculation.
Citation Formats
Aalto, E.
Measured and Predicted Neutron Fluxes in, and Leakage through, a Configuration of Perforated Fe Plates in D{sub 2}O.
Sweden: N. p.,
1965.
Web.
Aalto, E.
Measured and Predicted Neutron Fluxes in, and Leakage through, a Configuration of Perforated Fe Plates in D{sub 2}O.
Sweden.
Aalto, E.
1965.
"Measured and Predicted Neutron Fluxes in, and Leakage through, a Configuration of Perforated Fe Plates in D{sub 2}O."
Sweden.
@misc{etde_20949539,
title = {Measured and Predicted Neutron Fluxes in, and Leakage through, a Configuration of Perforated Fe Plates in D{sub 2}O}
author = {Aalto, E}
abstractNote = {Detailed neutron flux measurements have been performed in a 48 cm thick configuration of thin regions of Fe and D{sub 2}O (30 % of total thickness Fe), both when the Fe regions are massive and when they are penetrated by 15 cm dia. D{sub 2}O channels. It was found that the total leakage of neutrons through the configuration was increased by 25 % in the latter case. It is shown that this increase and the detailed flux distribution on a duct axis can be satisfactorily predicted by a one-dimensional shielding code when the duct is calculated as a pure D{sub 2}O layer and a radial buckling term is used for the < 1 eV neutrons when penetrating the Fe regions. Another calculation through the massive part of Fe is to be performed in the usual way. It is believed that this 2-component method is usable in a wider range of similar configurations, A calculation with regions where the Fe and the D{sub 2}O ducts have been homogenized into a single material overestimates the increase in leakage, and the relative error is greater than that in the 2-component calculation.}
place = {Sweden}
year = {1965}
month = {Sep}
}
title = {Measured and Predicted Neutron Fluxes in, and Leakage through, a Configuration of Perforated Fe Plates in D{sub 2}O}
author = {Aalto, E}
abstractNote = {Detailed neutron flux measurements have been performed in a 48 cm thick configuration of thin regions of Fe and D{sub 2}O (30 % of total thickness Fe), both when the Fe regions are massive and when they are penetrated by 15 cm dia. D{sub 2}O channels. It was found that the total leakage of neutrons through the configuration was increased by 25 % in the latter case. It is shown that this increase and the detailed flux distribution on a duct axis can be satisfactorily predicted by a one-dimensional shielding code when the duct is calculated as a pure D{sub 2}O layer and a radial buckling term is used for the < 1 eV neutrons when penetrating the Fe regions. Another calculation through the massive part of Fe is to be performed in the usual way. It is believed that this 2-component method is usable in a wider range of similar configurations, A calculation with regions where the Fe and the D{sub 2}O ducts have been homogenized into a single material overestimates the increase in leakage, and the relative error is greater than that in the 2-component calculation.}
place = {Sweden}
year = {1965}
month = {Sep}
}