• Title/Summary/Keyword: smear sampler

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Development of Automatic Smear Equipment for Measuring Surface Radioactivity Contamination (표면방사선 오염도 측정용 자동 스미어장치의 개발)

  • Tack, Han-Ho;Kang, Shin-Chool
    • Journal of Korea Society of Industrial Information Systems
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    • v.16 no.4
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    • pp.37-44
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    • 2011
  • This paper was development of surface contamination automatic smear sampling for measuring radioactive contamination in radiation controlled area of nuclear facility. In indirect method a smear paper are used manually. Activity on the smear paper is affected by varying the pressures applied, by the smearing time, by the difference of ares sampled during smearing. By means of these there are erroneous. In the future the apparatus will be developed as a portable apparatus measuring smear activity automatically by adding radiation detection instrument.

Study on the Coefficient of Consolidation of Marine Clay by Rowecell Consolidation Test (ROWECELL시험에 의한 해성점토의 압밀계수에 대한 연구)

  • 김종국;차영일;김혁기;김영웅
    • Proceedings of the Korean Geotechical Society Conference
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    • 2003.03a
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    • pp.725-732
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    • 2003
  • It was achieved that Rowecell test for this undisturbed sample was picked by Block sampler($\phi$:250mm, L:500mm) and hydraulic piston sampler($\phi$:76mm, L:850mm) in the marine clay of YONGYUDO and YEONGJONGDO in this research. Ratio of coefficient of consolidation was analyzed through comparison with C$\_$h/ by CPTu and C$\_$v/ and C$\_$h/ by existent consolidation test. According to analysis, coefficient of consolidation of block sample is fairly greater than coefficient of consolidation of piston sample. And the bigger diameter of undisturbed sample, sample disturbance could know decreasing. Coefficient of consolidation by Rowecell test measured more greatly than coefficient of consolidation by existent consolidation test. Rowecell test could know decreasing consolidation rate because of smear effect by Mandrel injection. Also, C$\_$h/ by CPTu shows deviation by each analysis method, selection of suitable analysis method judged by important leading in the coefficient of consolidation.

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