Leakage Radiations in a Medical Electron Accelerator Facility: Calculation of Neutron Doses in the Facility

Neutron doses often come dominant in mazes of electron accelerator facilities in which X-rays of energies more than 10 MV are produced. A simple analytical method to calculate neutron doses in such a facility is developed. In the calculation procedure, it is assumed that the irradiation room is sphe...

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Bibliographic Details
Published in:RADIOISOTOPES 1990/02/15, Vol.39(2), pp.29-36
Main Authors: ISHIMATSU, Kenji, MORIKAWA, Kaneo
Format: Article
Language:eng ; jpn
Subjects:
electron accelerator
Hospital Departments
leakage radiation
multiple reflection
multiple-legged maze
neutron
Neutrons
Particle Accelerators
Radiation Dosage
Radiation Protection
Radiology Department, Hospital
shielding calculation
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Summary:Neutron doses often come dominant in mazes of electron accelerator facilities in which X-rays of energies more than 10 MV are produced. A simple analytical method to calculate neutron doses in such a facility is developed. In the calculation procedure, it is assumed that the irradiation room is spherical in shape and the maze is cylindrical. Multipile reflection of neutrons is also considered using the albedo concept in the calculation. The procedure allows to exist a hanging wall over the entrance of the irradiation room and also multiple legs in the maze. All the parameters used in the calculation are given definitely in the procedure, and any experiment is unnecessary to determine value of the parameters. Comparison of the calculated results with experimental ones will be described in the following report.
ISSN:0033-8303
1884-4111
DOI:10.3769/radioisotopes.39.2_29