국내 지르콘 취급 산업 종사자 NORM 흡입에 따른 내부피폭 방사선량 평가
Assessment of Internal Dose for Worker due to Inhale NORM in Zircon Industry
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Naturally Occurring Radioactive Material (NORM) is used as a raw material in variousindustries around the world. The IAEA identify the zircon handling industry as a major NORM handlingindustry. Since the domestic zircon handling industry handles raw materials in the form of powder, thereis a possibility that industrial workers inhale dust containing NORM in the process of performing work. Therefore, as part of the radiological safety assessment for workers in the domestic zircon handlingindustry, the internal dose due to inhale the NORM must be assessed. The purpose of this study is toassess the internal dose due to inhale the NORM for workers in the domestic zircon handling industrybased on the measured particle properties. To achieve the purpose of the study, the major processesof the industry were first selected, and the working environment was investigated to analyze theexposure scenario of worker. In addition, based on the analysis results of major processes and workingenvironments for each industry, the radioactivity concentration of materials and particle properties ofdust in major processes were analyzed. Based on the finally analyzed working environment and particleproperties, the internal dose for workers in the zircon handling industry was assessed. The internaldose for workers in the refractory, casting frame, and glaze manufacturing industries, which arerepresentative of the zircon industry in Korea, was 1.83×10-4~8.19×10-3 mSv y-1. Thorium was foundto be the major nuclide with the highest dose contribution in the domestic zircon handling industry. Andthe main influencing factors of the internal dose due to particle inhalation were derived as radioactivityconcentration, particulate concentration, particle size, and working time. The internal dose for workers ineach industry was different depending on the type of work, working environment, and handling materials. The internal dose for workers in the domestic zircon handling industry was found to be less than 1 mSvy-1, which is the annual dose limit for the public stipulated by the domestic Nuclear Safety Act. The resultsof this study are expected to be used as basic data for identifying the exposure status of workers in thedomestic NORM handling industry and developing effective safety management measures.
Abstract
Naturally Occurring Radioactive Material (NORM) is used as a raw material in variousindustries around the world. The IAEA identify the zircon handling industry as a major NORM handlingindustry. Since the domestic zircon handling industry handles raw materials in the form of powder, thereis a possibility that industrial workers inhale dust containing NORM in the process of performing work. Therefore, as part of the radiological safety assessment for workers in the domestic zircon handlingindustry, the internal dose due to inhale the NORM must be assessed. The purpose of this study is toassess the internal dose due to inhale the NORM for workers in the domestic zircon handling industrybased on the measured particle properties. To achieve the purpose of the study, the major processesof the industry were first selected, and the working environment was investigated to analyze theexposure scenario of worker. In addition, based on the analysis results of major processes and workingenvironments for each industry, the radioactivity concentration of materials and particle properties ofdust in major processes were analyzed. Based on the finally analyzed working environment and particleproperties, the internal dose for workers in the zircon handling industry was assessed. The internaldose for workers in the refractory, casting frame, and glaze manufacturing industries, which arerepresentative of the zircon industry in Korea, was 1.83×10-4~8.19×10-3 mSv y-1. Thorium was foundto be the major nuclide with the highest dose contribution in the domestic zircon handling industry. Andthe main influencing factors of the internal dose due to particle inhalation were derived as radioactivityconcentration, particulate concentration, particle size, and working time. The internal dose for workers ineach industry was different depending on the type of work, working environment, and handling materials. The internal dose for workers in the domestic zircon handling industry was found to be less than 1 mSvy-1, which is the annual dose limit for the public stipulated by the domestic Nuclear Safety Act. The resultsof this study are expected to be used as basic data for identifying the exposure status of workers in thedomestic NORM handling industry and developing effective safety management measures.
참고문헌 (25)
- IAEA, "Assessing the Need for Radiation Protection measures in Work Involving Minerals and Raw Materials" (2006)
- 59, "Council Directive 2013", pp.European Atomic Energy Community, EURATOM
- ICRP, "Radiological protection from naturally occurring radioactive material (NORM) in industrial processes" (2019)
- IAEA, "Radiation Protection and NORM Residue Management in the Zircon and Zirconia Industries" (2007)
- IAEA, "Radiation Protection and Safety of Radiation Sources : International Basic Safety Standards" (2014), GSR Part
- IAEA, "Occupational Radiation Protection" (2018)
- Sources, Effects and Risk of Ionizing Radiation, "UNSCEAR", ~, pp.UNSCEAR 2020 (2020), 2021 Report Volume IV
- Ballesteros L, "Occupational exposure to natural radioactivity in a zircon sand milling plant", J. Environ. Radioact, 99(10), pp.1525~1529 (2008)
- Fathabadi N, "Evaluation of Occupational Exposure to Naturally Occurring Radioactive Materials in the Iranian Ceramics Industry", Radiat. Prot. Dosim, 145(4), pp.400~404 (2011)
- Righi S, "Assessment of the radiological impacts of a zircon sand processing plant", J. Environ. Radioact, 82(2), pp.237~250 (2005)
- Kim KP, "Influence of Particle Size Distribution on Inhalation Dose to Workers in the Florida Phosphate Industry", Health Phys, 91(1), pp.58~67 (2006)
- Seung Woo Ji, "Radiation Dose Assessment to Workers Due to NORM Inhalation in the Korean Phosphate Industry", Journal of the Korean Physical Society, 73(7), pp.1007~1011 (2018), 한국물리학회
- 박종혁, "국내 저어콘 취급 산업체 작업종사자 외부피폭 방사선량 평가", 방사선산업학회지, 16(1), pp.31~39 (2022), (사)한국방사선산업학회[DOI]
- ICRP, "Human Respiratory Tract Model for Radiological Protection" (1994)
- ICRP, "Age-dependent Doses to Members of the Public from Intake of Radionuclides - Part 4 Inhalation Dose Coefficients" (1995)
- Takashi Satio, "234U", 238U Activity Ratios of Uranium in Bauxite and Aluminum Compounds, 1997, pp.36, 331~335
- Virgil AM, "History of Impactors-The First 110 Years", AS&T, 38(3), pp.247~292 (2004)
- EPA, "Methods for Derivation of Inhalation Reference Concentrations and Application of Inhalation Dosimetry" (1994)
- Department of Mines and Petroleum, "Managing Naturally Occurring Radioactive Material (NORM) in Mining and Mineral Processing. NORM 3.5", ~ (2010)
- TIFAC, "Bauxite Status, Opportunities, and Road Ahead" (2018)
- MEL, "Notice of Ministry of Employment and Labor No.2020-35. Notice of safety certification for protective equipment", ~ (2020)
- ICRP, "Age-dependent Dose to Members of the Public from Intake of Radionuclides - Part 3 Ingestion Dose Coefficient" (1995)
- Methods and Models of the Hanford Internal Dosimetry Program, "U.S. Department of Energy", ~, pp.PNNL-MA-860. PNNL-15614, Rev.1 (2009)
- 김시영, "천연방사성물질을 함유한 공기 중 부유입자 흡입 시 입자의 물리화학적 특성에 따른 호흡방사선량 민감도 평가", 방사선방어학회지, 40(4), pp.216~222 (2015), 대한방사선방어학회
- NSSC, "Enforcement Decree of the Nuclear Safety Act Artcle 2 Paragraph 4", ~ (2021)