市販の大気中放射性エアロゾル捕集用フィルタの表面捕集効率及び流量の安定性の評価  [in Japanese] Evaluation of a Surface Collection Efficiency and a Stability of Flow Rate for the Commercially Available Filters Used for Ambient Radioactive Aerosols  [in Japanese]

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Author(s)

    • 山田 椋平 YAMADA Ryohei
    • 弘前大学大学院保健学研究科|(国研)日本原子力研究開発機構核燃料サイクル工学研究所放射線管理部 Hirosaki University Graduate School of Health Sciences|Radiation Protection Department, Nuclear Fuel Cycle Engineering Laboratories, Japan Atomic Energy Agency
    • 細田 正洋 HOSODA Masahiro
    • 弘前大学大学院保健学研究科|弘前大学被ばく医療総合研究所 Hirosaki University Graduate School of Health Sciences|Institute of Radiation Emergency Medicine, Hirosaki University

Abstract

<p>Airborne radioactivity measurements are necessary to know the contamination level and internal doses for residents after a nuclear accident. In addition, measurements of radon progenies in air, which are the risk factor of lung cancer, are also important to evaluate lung dose. In these measurements, a filter sampling is used to collect radioactive aerosols. However, it is well known that results of the measurement using a filter are strongly dependent on characteristics of the used filter. Selection of a suitable filter is important to achieve the high-resolution and long-term measurement. "Surface collection efficiency (SCE)" and "stability of air flow rate" were examined for six types of filter that are commercially available in Japan. In Japan, cellulose-glass fiber filter paper (HE-40T) is used for an environmental monitoring in Japan. In this study, it was found that the SCE of HE-40T was lower than that of mixed cellulose ester type membrane filter by Merck Millipore (DAWP02500). Attenuation ratio of flow rate for DAWP02500 was evaluated to be 2.9% which was lowest in six filters. The results suggest that the DAWP02500 is the most suitable for collecting radioactive aerosols for a long term.</p>

Journal

  • Japanese Journal of Health Physics

    Japanese Journal of Health Physics 54(1), 5-12, 2019

    Japan Health Physics Society

Codes

  • NII Article ID (NAID)
    130007701667
  • Text Lang
    JPN
  • ISSN
    0367-6110
  • Data Source
    J-STAGE 
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