Radiation Safety Control Research Articles

Analisis Laju Dosis Paparan Pada Penggunaan Mobile Shielding di Ruang Panoramik RSUD Koja

Panoramic is an extra oral examination that can produce an image of the entire mouth in a single exposure to speed up the examination. However, a panoramic examination takes several seconds until the collimator finishes surrounding the object. Therefore, knowing how to properly use self-protective devices and monitor radiation exposure is necessary to optimize radiation safety control. This study aims to analyze the feasibility of using mobile shielding as self-protection during exposure to a panoramic examination. This study was conducted at Koja Hospital in February - June 2023 using an analytical, quantitative method to measure the exposure dose rate in the panoramic room of Koja Hospital. Measurements are made using a calibrated survey meter measuring instrument. The result of measuring the initial exposure at a distance of 100 m is 84.19 µSv. Data analysis shows that the exposure received by radiation workers is far from the established dose limit value, so mobile shielding used as a self-protective device in the panoramic room of Koja Hospital is still worth using with high-efficiency values of 99.16% and wood+Pb at 99.14%. Although the rate of exposure dose received is still far from the dose limit value, workers should be careful when using radiation to minimize health risks. Keywords: radiation shielding, mobile shielding dose rate, effectiveness

MONITORING OF RADIATION AND ENVIRONMENTAL CHARACTERISTICS OF BUILDINGS

Human economic activity leads to a significant redistribution of natural radionuclides in the environ-ment. Radiation background in buildings is considered as one of the main types of radiation exposure on the population, since a person spends most of his time indoors. Currently, with the adoption of federal laws: “On the radiation safety of the population” No. 3-FZ 09.01.1996, “On the Sanitary and Epidemiological Welfare of the Population” No. 52-FZ 30.03.1999, and also on the “Radiation Safety Standards "(NRB-99/2009)," Basic Sanitary Rules for Ensuring Radiation Safety "(OSPORB-99/2009), approaches to the organization of radiation control in the construction industry and, consequently, to the organization of radiation safety con-trol of the population, have changed in many ways. The article deals with the problems of ensuring radiation and environmental safety in the construction of buildings.The need for research on the radiation-ecological characteristics of buildings is shown. An important problem for the construction industry is the radiation and hygienic support of technological processes and construction. In many ways, the solution of the problems related to improving of the radiation safety of building complexes depends on the implementation of legisla-tion connected with population restrictions from exposure of natural radionuclides. The results of large-scale studies of the effective specific activity of natural radionuclides in building materials and industrial waste produced and used in the Volgograd region are presented in this article. It has been established that con-struction materials produced in the Volgograd region, in accordance with national legislative and regulatory requirements, belong to class 1 and can be used for the construction of residential and public buildings. There have been presented the results of the survey on the radon content in the air of residential buildings from various building materials, as well as the density of radon fluxes from the soil. Radiation monitoring of construction sites is necessa ensure the radiation safety of the population.

Neutron Monitoring at the Area of IRC “Pamir-Chakaltaya” for Radiation Safety Control

The results of neutron monitoring at the high-altitude area of the International Research Center “Pamir-Chakaltay” at an altitude of 4370 meters above sea level are presented. Measurements with the help of radiometers PDA-Pack Eye, МКS-RМ1401К and RSU-01R revealed an excess of 5–7 times the neutron flux density at the 2-tier X-ray emulsion chamber in the hangar and in the storage areas of lead and rubber plates. At the same time, instrument readings experienced significant (up to 30%) fluctuations in time.

Measurement of Gamma-Rays Using Smartphones

The CMOS (Complementary Metal Oxide Semiconductor) image sensor of a smartphone has been known for its sensitivity to gamma-rays. In this research, some smartphones were selected and tested for measurement of gamma-rays emitted from Cesium-137 and Iridium-192 sources. During measurements, the phones were set in video mode while the camera lenses were covered with black adhesive tape to prevent light exposure. Interaction of gamma-rays with the CMOS appeared as flashing bright spots on the image. The bright spots were then counted by using the freely available ImageJ software. Preliminary results indicated that the number of bright spots increased linearly with increase of gamma-ray dose rate. An in-house Android application software was then developed for real-time counting of the bright spots. The application software also allowed users to input a calibration equation so that the phones could simultaneously convert the count rate to display in dose rate. This research demonstrated that, after appropriate calibration, smartphones could be used as gamma-ray measuring devices for radiation safety control involving high activity sources such as in industrial radiography, gamma-ray irradiation facility and medical treatment.

전리방사선 노출과 관리

Objectives: To investigate safety and health management, conditions in factories or facilities handling radiation-generating devices and radioactive isotopes were reviewed in terms of regulations of radiation safety control in Korea. Radiation exposure levels generated at those facilities were directly measured and evaluated for establishing an effective safety and health management plan. Methods: Government organizations with laws and systems of radiation safety and health were investigated and compared. There are three laws governing radiation-related employment such as occupational safety and health acts, nuclear safety acts, and medical service acts. We inspected 12 workplaces as research objects:four workplaces that manufacture and assemble semiconductor devices, three non-destructive inspection workplaces that perform inspections on radiation penetration, and five workplaces in textile and tire manufacturing. Monitoring of radiation exposure was performed through two methods. Spatial and surface monitoring using real-time radiation instruments was performed on each site handling radiation generating devices and radioactive isotopes in order to identify radiation leakage. Results: According to the occupational safety and health act, there is no legal obligation to measure ionizing radiation and set dose limits. This can cause confusion in the application of the laws, because the scopes and contents are different from each other. Surface dose rates in radiation generating devices such as implanters, thickness gages and accelerators, which were registered according to nuclear safety acts, using surveymeters, and seven of 36 facilities(19.4%) exceeded the international standards for surface radiation dose of <TEX>$10{\mu}Sv/hr$</TEX>. Conclusions: The results showed that occupational health and safety acts require a separate provision for measuring and assessing the radiation exposure of workers performing radiation work. Like noise, ionizing radiation will also periodically be controlled by including it in the object factors of work-environment measurement.

방사선안전관리 실무: (II) 배기중 및 배수중 배출관리기준의 적용

방사선안전관리 실무: (II) 배기중 및 배수중 배출관리기준의 적용

방사선안전관리 실무: (I) 연간섭취한도와 유도공기중농도의 적용

방사선안전관리 실무: (I) 연간섭취한도와 유도공기중농도의 적용

On radiation protection at the LINAC-800 linear electron accelerator

The Automatic System of Radiation Safety Control (ASRSC) of the LINAC-800 linear electron accelerator is designed to ensure radiation safety for accelerator personnel during regular operations and in emergency cases. The results of calculating the emission power used to develop the ARPS are given. Both hardware and software components of the radiation control system are described. This paper also presents a description of the interlock and signalization system.

線源管理の実際と問題点

線源管理の実際と問題点

移動型X線装置の放射線管理と防護(臨床技術講座)

移動型X線装置の放射線管理と防護(臨床技術講座)

8. The Consciousness and Behavioral Aspects of Radiological Technologist on Radiation Safety Control of Korean Hospital

8. The Consciousness and Behavioral Aspects of Radiological Technologist on Radiation Safety Control of Korean Hospital