Global Nuclear Safety
National Research Nuclear University "MEPhI"
online version: ISSN 2499-9733
print version: ISSN 2305-414Х
2018-2(27)
Operation of nuclear industry facilities
| Article Name | Modelling of Gamma-Scan Detector with Collimator for Investigating Differential Radioactive Contamination |
|---|---|
| Authors | Agyekum Ephraim Bonah (Ghana)*, Yu. Daneykin** |
| Address | National Research Tomsk Polytechnic University, Institute of Physics |
| Abstract | In this paper, a description of the model of the radiation state of a nuclear facility is developed, the composition of the model is outlined, the problems of the formation of the engineering-radiation model of the nuclear facility are considered on the basis of the engineering model of radiation inspection and gamma radiation calculations depending on the radionuclide composition, the activity of radiation sources, and also their geometric sizes and shapes. Methods for calculating radiation emanating from contaminated assemblies of the nuclear facility elements requiring maintenance or disassembly are considered as radionuclide sources of photon radiation having certain physical characteristics, such as dimensions and activity. Sources based on radionuclides are isotropic radiators. The geometric dimensions and shape of such sources can be very diverse in form and size. The existing methods for calculating the dose fields created by radionuclide sources of ionizing radiation of various geometric shapes are investigated. The methods considered are based on similar approaches and represent a mathematical calculation of the characteristics of the dose field depending on the shape of the source, its activity and the relative spatial location of the calculated point in the field and the source. Therefore, special methods for calculating exposure dose rate from extended sources have been developed. |
| Keywords | Decommissioning, radionuclide, canonical, monoenergetic, attenuation, detector, phantom, cylinder, decontaminate, radioactivity, gamma |
| Language | Russian |
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| Papers | 66 - 73 |
| URL Article | URL Article |
| Open Article |