• 제목/요약/키워드: 라돈

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A New Aluminium Container for $\gamma$-Ray Spectrometry Analysis of Radium and Radon (라듐 및 라돈의 감마선 분광 분석을 위한 알루미늄 용기의 제작 및 특성 조사)

  • Lee, Kil Yong;Yoon, Yoon Yeol;Seo, Bum Kyoung
    • Analytical Science and Technology
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    • v.13 no.6
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    • pp.743-750
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    • 2000

  • For the ${\gamma}$-ray spectrometry analysis of radium and radon in environmental samples, plastic Marinelli beakers have been usually used. But, there are two problems; one is the increment of background by adsorption of airborne radon daughters on the plastic beaker, and other is the incompleteness of radioactive equilibrium by the loss of gaseous radon produced during the radioactive equilibrium process. In order to solve these problems, we made aluminium counting container, and investigated its characteristics. We investigated radioactive equilibrium process using the aluminium container. We found that both solid and liquid samples reached at radioactive equilibrium state in the aluminium container without loss of gaseous radon. By the use of the aluminium container, we established radon and radium analysis method of solid and liquid samples using gamma-ray spectrometry.

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A Preliminary Investigation of Radon Concentration for Some Agricultural Greenhouses in Jeju Island (제주지역 일부 농업 시설 내 라돈 농도 예비 조사)

  • Kang, Tae-Woo;Song, Myeong-Han;Kim, Tae-Hyoung;Chang, Byung-Uck;Kim, Young-Jae;Kim, Geun-Ho;Park, Jae-Woo
    • Korean Journal of Environmental Agriculture
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    • v.31 no.1
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    • pp.9-15
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    • 2012

  • BACKGROUND: A preliminary investigation of the radon ($^{222}Rn$) concentration has been conducted, employing solid-state nuclear-track detectors (SSNTD) and a continuous radon monitor (CRM), for fourteen randomly selected agricultural greenhouses in Jeju Island, where the underground-air was used for air conditioning and $CO_2$ supplement. METHODS AND RESULTS: The SSNTD was used to measure the average radon concentration for three months and the CRM was used for an instantaneous measurement. In order to obtain the radon concentration of a greenhouse, the SSNTDs were placed at a number of evenly distributed points inside the greenhouse and the mean of the measured values was taken. In addition, in order to assess the radon concentration of the underground-air itself, measurement was also made at the borehole of the underground-air in each agricultural facility, employing both the SSNTD and CRM. It is found that the radon concentration of the greenhouses ranges higher than those not using the underground-air and the average of Korean dwellings. While the radon concentration of most agricultural facilities is still lower than the reference level (1,000 Bq/$m^3$) recommended by the International Radiation Protection Committee (ICRP), three facilities at one site show higher concentrations than the reference level. The three-month-averaged radon concentration and the instantaneous radon concentration of the underground-air itself ranges 1,228- 5,259 and 3,322-17,900 Bq/$m^3$, respectively, and regional variation is more significant. CONCLUSION: From this results, radon concentration of the underground-air is assumed that it is associated with the geological characteristics and the boring depth of the region located of their.

  • https://doi.org/10.5338/KJEA.2012.31.1.9 인용 PDF KSCI

Radon Measurement by Alpha Particle Track Method (Alpha 입자비적법(粒子飛跡法)에 의(依)한 Radon 측정(測定))

  • Kang, Yung-Ho;Park, Jang-Sick;Kim, Do-Sung
    • Journal of Radiation Protection and Research
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    • v.7 no.1
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    • pp.17-22
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    • 1982

  • Measurement of the radon concentration close to the ground surface can be used in search of environmental radiation for human safety, exploration for uranium, premonitory signals from earthquakes. We can detect radons in soil gas by alpha particle track method using the plastic track detectors, cellulose nitrate (LR115-Type 2 and CA80-15, Kodak $Path\'{e}$) and CR-39. For present works, radon cups having these detectors were made in our laboratory and their conversion factor was determined. A typical conversion factor was $1tr/cm^2{\cdot}30days=1.2{\times}10^{-2}pCi/l$. In the radon cups, some of $CaSO_4$ were used as desiccant for reducing the moisture effects on plastic track detectors. With these radon cups, underground radon concentrations of Kyungpook area were measured. Average radon concentration in Daegu from Jan. 1981 to Feb. 1982 was 39.7pCi/l. From Aug. 1981 to Feb. 1982, average radon concentrations of Daegu, Angang, Kyungju, Pohang, Chungha, and Andong were 31.8pCi/l, 124.5pCi/l, 127.0pCi/l, 79.1pCi/l, 144.4pCi/l, and 70.9pCi/l, respectively. The results were compared with the environmental radiation measured by TLD method.

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