• Title/Summary/Keyword: 낙진

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개정 낙진법 시행에 앞서 고려할 문제들

  • 조흥원
    • 월간낙농육우
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    • v.17 no.10 s.186
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    • pp.100-101
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    • 1997

  • 새로운 낙진법 - 이는 분명 우리 낙농사에 혁신적인 변화를 가져 올 중대한 전환점이다. 이는 세계화의 물결속에 최소한의 낙농생존을 보증할 것이냐 낙농궤멸을 가속화 할 것이냐를 가름하는 분수령이 될 것이다. 우리 모두의 관심과 지혜를 모아 실행전 남은 짧은기간 착실한 준비를 하여 착오없는 낙진법 시행이 될 수 있도록 기원해야 될 것이다.

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Seasonal Variation of $^7Be$ and $^{137}Cs$ Concentrations in Airborne Dust, Dry Fallout and Precipitation in Daejeon (대전지역 대기부유진, 낙진 및 강수 중 $^7Be$ 및 $^{137}Cs$ 방사능 농도의 계절별 변화)

  • Kim, Chang-Kyu;Lee, Seung-Chan;Lee, Dong-Myung;Rho, Byung-Hwan
    • Journal of Radiation Protection and Research
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    • v.27 no.1
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    • pp.11-19
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    • 2002

  • The seasonal variation of $^7Be$ and $^{137}Cs$ concentrations in airborne dust, precipitation and dry fallout collected at Daejeon during the period of 1998 - 1999 has been studied. The annual mean values of 7Be concentrations in airborne dust, precipitation and dry fallout were in the range of $3.80{\sim}4.29\;mBq\;m^{-3},\;1.25{\sim}1.67\;Bq\;l^{-1},\;19.7{\sim}22.3 MBq\;km^{-2}$, respectively. The annual mean values of $^{137}Cs$ concentrations in airborne dust, precipitation and dry fallout ranged $1.08{\sim}1.28{\mu}Bq\;m^{-3},\;0.44{\sim}2.66 mBq\;l^{-1}\;\;0.036{\sim}0.0455\;MBq\;km^{-2}$, respectively. While the concentrations of $^7Be$ and $^{137}Cs$ in airborne dust and dry fallout were relatively higher in the spring and autumn when the amount of dry fallout increased than in other season, their concentrations in precipitation were relatively lower in the summer when the rainfall increased. The total depositions of $^7Be$ and $^{137}Cs$ due to dry fallout and precipitation were in the range of $80.7{\sim}137MBq\;km^{-2}$ and $0.059{\sim}0.060MBq\;km^{-2}$, respectively. More than 80% of $^7Be$ deposition resulted from precipitation, whereas about 60% of $^{137}Cs$ deposition was due to dry fallout.

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Dust Fall Property of Open Cut Limestone Mine (석회석 노천채광장의 분진 비산특성)

  • 이상권;김복윤;조영도;김임호
    • Explosives and Blasting
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    • v.17 no.2
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    • pp.45-51
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    • 1999

  • To find out the characteristics and trend of dust fall in open cut limestone mine in-situ measurement and wind tunnel tests were carried out. In-siti measurement was done by two dust fall samplers at the Halls mine for 60 days. The laboratory test was done in the 100m long temporary wind tunnel installed at the yard of the institute. The most of dust falled within 25m form the dust source and only less than 0.5% defused up to over 100 meters. It was known that the dust fall at 100m away from souces were negligible.

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