Abstract
Radiation measuring devices need to periodic calibration process to examine their sensitivity and the extent of the response. This study is used to evaluate the radiation doses of the workers in the laboratories of the Directorate of Safety as a result of the use of point sources in calibrating of the devices in two ways, the first is the direct measurement by the FAG device and the others using RESRAD and RAD PRO programs. The total doses values using FAG were (2.57 μSv/y, 102.3 μSv/y and 20.75 μSv/y for TLD laboratory, Gamma spectroscopy analyses (GSA) laboratory and equipment store respectively, and the total doses that calculated using RESRAD and RAD PRO were 1.518 μSv/y, 76.65 μSv/y and 21.2 μSv/y for the above laboratories. the dose rate is very low compare with the national, international dose rate limits (20 mSv/y).
Highlights
Everyone in our world is exposed to the ionizing radiations which are emitted by radioactive materials in the environment where we are living
Sealed and unsealed radioactive sources are used for a variety of purposes and they incorporate a wide range of radionuclides and amounts of radioactive material
A radioactive source is considered dangerous if its misuse could be life threatening or could cause a permanent injury that would reduce the quality of life of the person exposed
Summary
Everyone in our world is exposed to the ionizing radiations which are emitted by radioactive materials in the environment where we are living. The sources of these radiations are natural as well as man-made. Radioactive sources are used throughout the world in medicine, industry, agriculture, research and education; they are used in some military applications Many of these sources are made as sealed sources. The extent of any such injuries will depend on many factors, including: the activity of the radioactive source; how close a person is to the source and for how long; whether the source is shielded; and whether or not its radioactive material has been dispersed, leading to contamination of the skin or inhalation or ingestion[7,8]. This study aims to assess the rate dose and risk that received by workers in Radiation and Nuclear Safety Directorate (RNSD) in AL-Tuwitha nuclear site laboratories during the calibration of devises by using radioactive sources
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