• Title, Summary, Keyword: 저준위 방사선

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Mechanism of Radioresistance Induced by Low-Dose Irradiation (저준위 방사선에 의해 유도된 방사선저항의 기전)

  • Park, Sang-Hee;Cho, Chul-Koo;Yoo, Seong-Yul;Lee, Yeon-Hee
    • Journal of Radiation Protection and Research
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    • v.21 no.2
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    • pp.99-105
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    • 1996
  • After high-dose irradiation(8 Gy). the viability of lymphocyte with a prior low-dose irradiation was 3.7-fold higher than that without a prior low-dose irradiation The viability could be increased by the reduction of oxygen radicals or the removal of damaged molecules-DNA, protein. lipid membrane. or the removal of damaged cells. In this paper. we studied the radioresistance mechanism in lymphocytes and lymphoma cells by examining the activities of radical scavengers(catalase. peroxidase, superoxide dismutase, and glucose-6-phosphate dehydrogenase), and a radical protector(glutathione). Different enzymes were induced in lymphocyte and lymphoma with low-dose irradiation. The activity of peroxidase increased most(133.3%) in lymphoma while the enzymes increased most in lymphocyte were superoxide dismutase (138.5%), glucose-6-phosphate dehydrogenase (122.4%) and glutathione(120.8%). The activities of these enzymes were highest when the interval was 7 hours between low-dose and high-dose irradiation.

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저준위방사선은 생명유지에 불가흠?

  • 한국원자력산업회의
    • Nuclear industry
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    • v.7 no.10
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    • pp.84-87
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    • 1987
  • 저준위방사선은 인류에 있어서 정말로 나쁜 영향이 있는 것인지. ${\ulcorner}$가능한한 낮게${\lrcorner}$가 상식으로 되어 있는 원자력 세계에 감히 의문을 갖고 이 상식과는 다른 견해를 내세우는 연구자가 나오기 시작하고 있다. 그 연구나 사례는 그 역사나 데이터에서 오늘의 원자력계의 ${\ulcorner}$상식${\lrcorner}$을 타파하기 까지에는 이르지 않지만 하나의 사고 실험으로서는 흥미있는 내용으로 되어 있다.

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A Cohort Study on Cancer Risk by Low-Dose Radiation Exposure among Radiation Workers of Nuclear Power Plants in Korea (저준위 방사선 노출의 암 유발에 관한 국내 원전종사자 코호트 연구)

  • Lim, Young-Khi;Yoo, Keun-Young
    • Journal of Radiation Protection and Research
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    • v.31 no.2
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    • pp.53-63
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    • 2006
  • The increased risk of cancer with exposure to low-dose radiation was estimated through longitudinal study for radiation workers at the nuclear power plants in Korea. The radiation dose data were collected from the Radiation Safety Management System(RSMS) of the Korea Hydro & Nuclear Power Co., Ltd(KHNP). The cancer risks with radiation exposure were evaluated in terms of relative mortality ratios(RMR) and relative incidence ratios(RIR) to the unexposed employees at the nuclear power plants, and of the standardized mortality ratios(SMR) and standardized incidence ratios(SIR). There were no significant increases of canters of all sites in the exposed group either in RIR[1.08, 95% confidence interval(CI) 0.74-1.58] or in RMR[1.21, CI 0.70-2.08]. Neither SIR[0.81, CI 0.28-0.96] nor SMR[0.86, CI 0.66-1.10] significantly deviated from 1.0 for cancers of all sites. The trend analysis did not identify evident dose-response relationship due to insufficient numbers of the cases. Consequently, it is concluded that increases in cancer risks in the radiation worker group exposed to low doses at the nuclear power plants in Korea are not identified at this time.

Control of Background Interference from Radon and Its Daughters with Nitrogen Gas (질소가스를 이용한 라돈 및 딸핵종의 백그라운드방해 억제)

  • 이길용;윤윤열;김건한;심상권;양명권;서범경
    • Proceedings of the Korea Air Pollution Research Association Conference
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    • pp.337-339
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    • 2000
  • 저준위 환경 방사능 측정에서 가장 문제가 되는 것은 주변의 백그라운드에 의한 영향이다. 백그라운드로는 우주선, 지각 방사선, 그리고 대기중의 방사선 둥이 있다. 이러한 백그라운드를 감소시킬 수 있다면 저준위 방사능 측정의 감도향상은 물론 정확성을 향상시킬 수 있다. 이러한 백그라운드 중에서 대기중의 방사선은 주로 지각으로부터의 라돈 방출에 의하여 기인하게 된다(Eisenbud, 1987 : Thomas, 1972). 방출된 라돈 및 딸핵종들은 대기 중의 먼지에 흡착되어 부유하게 되는데, 부유 먼지에 흡착된 백그라운드의 주요 원인이 된다. (중략)

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Irradiation Test of Bar Code Label (바코드 라벨의 방사선 조사시험)

  • 배상민;이강무;손종식;홍권표;고병령
    • Proceedings of the Korean Radioactive Waste Society Conference
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    • pp.544-548
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    • 2003
  • The Irradiation test of bar code label tagged on radioactive waste container was done to determine the effect of radiation. Low and medium radioactive waste is that below total activity of 4,000 Bq/g according to the Korean nuclear law. The irradiation amount to radiate bar code label tagged on radioactive waste container was calculated by MCNP-4b computer code. The nuclide such as Co-60 and Cs-137 was assumed to contribute 50% of total activity. Real irradiation amount for bar code label was finally calculated by the dimensions of the container and the bar code label. The Identification of post and the physical deflection of irradiated bar code label was tested by the bar code reader. The coated bar code label was suitable to use on low and medium radioactive waste container.

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Environmental radiation monitoring program of low- and intermediate- level waste disposal site (중$\cdot$저준위 방사성폐기물 처분시설 환경방사선조사 계획)

  • 윤철환;한재문;김경덕
    • Proceedings of the Korean Radioactive Waste Society Conference
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    • pp.239-243
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    • 2003
  • Environmental monitoring program is investigated based on Atomic Energy Law and foreign country radiation monitoring programs on low-and intermediate level radioactive waste disposal site. It is anticipated that the number of radiation measurements and samples will be higher than those of NPP's. The radiation monitoring program on LLW disposal site should be well prepared reflecting PA, site characteristics and regulation.

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