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김희령

Kim, Hee Reyoung
RAdiation and MagnetohydroDynamics Advanced Lab.
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Analysis and radiation dose assessment of Rn-222 in indoor air at schools: Case study at Ulju County, Korea

Author(s)
Lee, ChoongWieChoi, SungyeolKim, Hee Reyoung
Issued Date
2018-06
DOI
10.1016/j.net.2018.03.020
URI
https://scholarworks.unist.ac.kr/handle/201301/24351
Fulltext
https://www.sciencedirect.com/science/article/pii/S173857331730815X?via%3Dihub
Citation
NUCLEAR ENGINEERING AND TECHNOLOGY, v.50, no.5, pp.806 - 813
Abstract
Rn-222 exists in nature in the form of a rare radioactive gas. In terms of environmental radiation, issues regarding Rn-222 have persisted because of its radiological hazardousness. Ulju County is one of the regions of Ulsan metropolitan city, with a population of 227,699. Ulju County has the highest density of industrial complexes in Korea. In this study, Rn-222 radioactivity concentration was measured and analyzed in 57 schools in Ulju County using 114 passive LR-115 type detectors to secure radiological safety and confirm basic information for reduction of resident exposure to Rn-222. The effective dose of Rn-222 was assessed to find the actual risk of the concentration surveyed in schools to human beings. The dose depended on four factors: subjects, Rn-222 concentration, dose coefficient, and time. The individuals subjected to dose estimation were classified into three types: students, teachers, and office workers. The subjects had different dwelling locations and times. The findings demonstrate that the radiological hazard to students and workers at schools in Ulju County owing to Rn-222 is negligible in terms of Rn-222 activity recommendation level.
Publisher
KOREAN NUCLEAR SOC
ISSN
1738-5733
Keyword (Author)
Dose AssessmentsIndoor AirRn-222SchoolsUlju County
Keyword
SEOUL METROPOLITAN SUBWAYRADON CONCENTRATIONLUNG-CANCERCOMPARATIVE DOSIMETRYSEASONAL-VARIATIONDECAY PRODUCTSUNIT EXPOSUREDWELLINGSPROGENYRISK

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