Abstract
Radioactive material deposited in the environment after an accidental release would cause exposure of the population living in the affected areas. The radiation field will depend on many factors such as radionuclide composition, surface contamination density, removal of activity by weathering and migration, and protective measures like decontamination, ploughing and covering by asphalt. Methods are described for calculation of air kerma rate from deposited activity on road and soil surfaces, both from the initially deposited activity and from activity distributed in the upper layer of soil as well as from activity covered by asphalt or soil. Air kerma rates are calculated for different source geometries and the results are fitted to a power-exponential function of photon energy, depth distributions in soil and horizontal dimensions. Based on this function calculations of air kerma rate can easily be made on a personal computer or programmable pocket calculator for specific radionuclide compositions and different horizontal and vertical distributions of the deposited activity. The calculations are compared to results from other methods like the Monte Carlo method and good agreement is found between the results. (au) (7 tabs., 12 ills., 8 refs.).
Citation Formats
Hedemann Jensen, P.
Gamma radiation fields from activity deposited on road and soil surfaces; Gammastraalingsfelter fra deponeret aktivitet paa veje og jordoverflader.
Denmark: N. p.,
1993.
Web.
Hedemann Jensen, P.
Gamma radiation fields from activity deposited on road and soil surfaces; Gammastraalingsfelter fra deponeret aktivitet paa veje og jordoverflader.
Denmark.
Hedemann Jensen, P.
1993.
"Gamma radiation fields from activity deposited on road and soil surfaces; Gammastraalingsfelter fra deponeret aktivitet paa veje og jordoverflader."
Denmark.
@misc{etde_10138592,
title = {Gamma radiation fields from activity deposited on road and soil surfaces; Gammastraalingsfelter fra deponeret aktivitet paa veje og jordoverflader}
author = {Hedemann Jensen, P}
abstractNote = {Radioactive material deposited in the environment after an accidental release would cause exposure of the population living in the affected areas. The radiation field will depend on many factors such as radionuclide composition, surface contamination density, removal of activity by weathering and migration, and protective measures like decontamination, ploughing and covering by asphalt. Methods are described for calculation of air kerma rate from deposited activity on road and soil surfaces, both from the initially deposited activity and from activity distributed in the upper layer of soil as well as from activity covered by asphalt or soil. Air kerma rates are calculated for different source geometries and the results are fitted to a power-exponential function of photon energy, depth distributions in soil and horizontal dimensions. Based on this function calculations of air kerma rate can easily be made on a personal computer or programmable pocket calculator for specific radionuclide compositions and different horizontal and vertical distributions of the deposited activity. The calculations are compared to results from other methods like the Monte Carlo method and good agreement is found between the results. (au) (7 tabs., 12 ills., 8 refs.).}
place = {Denmark}
year = {1993}
month = {Dec}
}
title = {Gamma radiation fields from activity deposited on road and soil surfaces; Gammastraalingsfelter fra deponeret aktivitet paa veje og jordoverflader}
author = {Hedemann Jensen, P}
abstractNote = {Radioactive material deposited in the environment after an accidental release would cause exposure of the population living in the affected areas. The radiation field will depend on many factors such as radionuclide composition, surface contamination density, removal of activity by weathering and migration, and protective measures like decontamination, ploughing and covering by asphalt. Methods are described for calculation of air kerma rate from deposited activity on road and soil surfaces, both from the initially deposited activity and from activity distributed in the upper layer of soil as well as from activity covered by asphalt or soil. Air kerma rates are calculated for different source geometries and the results are fitted to a power-exponential function of photon energy, depth distributions in soil and horizontal dimensions. Based on this function calculations of air kerma rate can easily be made on a personal computer or programmable pocket calculator for specific radionuclide compositions and different horizontal and vertical distributions of the deposited activity. The calculations are compared to results from other methods like the Monte Carlo method and good agreement is found between the results. (au) (7 tabs., 12 ills., 8 refs.).}
place = {Denmark}
year = {1993}
month = {Dec}
}