• 제목/요약/키워드: Department of Radiological Science

검색결과 2,510건 처리시간 0.037초

Variations in radiochemical purity according to temperature of storage and radical scavenger

  • Kim, Deok Ju;Kim, Min Soo;Kim, Jin Seok;Bae, Yeon Gyu;Sun, Chan Young;Choi, Seung Jae;Lee, Sang-Yoon
    • 대한방사성의약품학회지
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    • 제2권2호
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    • pp.132-136
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    • 2016
  • Radiolysis is the process of decreasing in Radio-Chemical Purity (RCP) of [$^{18}F$]FDG by direct effect and indirect effect of self Radio-activity. The objective of our study was to figure out the ideal conditions which minimize damages of quality of [$^{18}F$]FDG using radical scavenger and controlling temperature of storage.

인천지역 근린공원의 토양 방사능 농도 (Soil Radioactivity in Urban Parks of Incheon)

  • 장준수;이상복;백가은;신희철;이경재;이도화;김성철
    • 대한방사선기술학회지:방사선기술과학
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    • 제46권1호
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    • pp.37-42
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    • 2023
  • Most of research on environmental radioactivity is conducted in areas near nuclear power plants, so basic data about the distribution of environmental radioactivity in soil in other areas are insufficient. Therefore, in this study, divide into four categories by the land development characteristics of Incheon and the purpose of development, and confirm the stability of the Incheon through soil sample collection and gamma-ray analysis based on 40K, 137Cs and 226Ra (214Pb, 214Bi). The spectrum obtained by measuring for 80,000 seconds by using the HPGe detector was analyzed by Genie 2000 program. Soil radioactivity concentrations in urban parks of Incheon area are generally within a safe range compared to the results of the Nuclear safety and security commission. However, as 137Cs was detected in one park, which will require continuous monitoring.

먹는 샘물의 방사성물질 측정 및 유해성 평가 (Evaluation of Radioactive Substance and Measurement of Harmfulness in Drinking Water)

  • 조정원;이상복;남조현;노은정;백현우;이예진;이준세;최지원;김성철
    • 대한방사선기술학회지:방사선기술과학
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    • 제44권3호
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    • pp.247-252
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    • 2021
  • As the number of single-person households increases, the consumption of bottled water is increasing. In addition, as the public's interest in radioactivity increases, interest in the field of living radioactivity is also increasing. Since drinking water is an essential element in our daily life, it must be safe from radioactivity. In this study, gamma radiation of drinking spring water was measured and internal exposure dose evaluation was performed to determine its harmfulness. K-40 and uranium-based radioactivity analysis was performed through a high-purity germanium detector, and as a result, drinking water was detected somewhat higher than that of mixing water. Since there is no regulation on the natural radioactivity concentration in Korea, it was compared with the U.S. Environmental Protection Agency Drinking Water Regulations and World Health Organization standard. As a result, there were some items that exceeded standards. Internal exposure was evaluated according to the effective dose formula of ICRP 119. As the result was derived that a maximum of 1.17 mSv per year could be received. This result means that the dose limit for the general public may be exceeded, and it was judged that it is necessary to set an appropriate standard value and present a recommendation value through continuous monitoring in the future.