Radiological Assessment of Environmental Impact of the IF-System Facility of the RAON
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Published:2021-06-30
Issue:2
Volume:46
Page:58-65
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ISSN:2508-1888
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Container-title:Journal of Radiation Protection and Research
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language:en
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Short-container-title:J Radiat Prot Res
Author:
Lee Cheol-WooORCID,
Whang Won Tae,
Kim Eun Han,
Han Moon Hee,
Jeong Hae Sun,
Jeong Sol,
Lee Sang-jin
Abstract
Background: The evaluation of skyshine distribution, release of airborne radioactive nuclides, and soil activation and groundwater migration were required for radiological assessment of the impact on the environment surrounding In-Flight (IF)-system facility of the RAON (Rare isotope Accelerator complex for ON-line experiment) accelerator complex.Materials and Methods: Monte Carlo simulation by MCNPX code was used for evaluation of skyshine and activation analysis for air and soil. The concentration model was applied in the estimation of the groundwater migration of radionuclides in soil.Results and Discussion: The skyshine dose rates at 1 km from the facility were evaluated as 1.62 × 10<sup>-3</sup> μSv·hr<sup>-1</sup>. The annual releases of <sup>3</sup>H and <sup>14</sup>C were calculated as 9.62 × 10<sup>-5</sup> mg and 1.19 × 10<sup>-1</sup> mg, respectively. The concentrations of <sup>3</sup>H and <sup>22</sup>Na in drinking water were estimated as 1.22 × 10<sup>-1</sup> Bq·cm<sup>-3</sup> and 8.25 × 10<sup>-3</sup> Bq·cm<sup>-3</sup>, respectively.Conclusion: Radiological assessment of environmental impact on the IF-facility of RAON was performed through evaluation of skyshine dose distribution, evaluation of annual emission of long-lived radionuclides in the air and estimation of soil activation and groundwater migration of radionuclides. As a result, much lower exposure than the limit value for the public, 1 mSv·yr<sup>-1</sup>, is expected during operation of the IF-facility.
Funder
National Research Foundation of Korea
Ministry of Science and ICT
Publisher
Korean Association for Radiation Protection
Subject
Health, Toxicology and Mutagenesis,Public Health, Environmental and Occupational Health,Radiology, Nuclear Medicine and imaging,Radiation