ICRP新呼吸気道モデルに基づく^<239>Puの内部被曝線量評価における粒子性状依存性 Effect of Aersol Characteristics on Internal Dose of Inhaled ^<239>Pu according to the New ICRP Respiratory Tract Model

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著者

    • 稲葉 次郎 INABA Jiro
    • 放射線医学総合研究所内部被ばく研究部 Division of Radiotoxicology, National Institute of Radiological Sciences

抄録

In the new human respiratory tract model of the International Commission on Radiological Protection, ICRP66 1994, the following values are recommended as default parameters characterizing aerosols inhaled; particle density of 3g/cm<sup>3</sup>, aerodynamic shape factor of 1.5 and AMAD of 5μm for occupational exposure. It seems important to assess the extent of variation of dose depending on the chemical form and the diameter of the aerosols inhaled. The deviations of dose obtained by changing the values of these parameters from the default values are studied. The results are follows. (1) Dose coefficient for <sup>239</sup>Pu of type S compounds is 8.6×10<sup>-6</sup>Sv/Bq for aerosols having the default parameter values, which is one tenth of that in ICRP Publication 30. (2) The dose decreases gradually with the diameter of the aerosols at around 1μm; at 0.2μm it is twice of that for 1μm aerosols and it decreases to half at 8μm. (3) The effects of particle density and particle shape are both small. (4) Type M compounds delivers four times higher doses than type S compounds. The reliability and the precision of dose evaluation depend largely on the availability of data characterizing intake radionuclides, such as diameter of aerosols and chemical form.

収録刊行物

  • 保健物理 : hoken buturi  

    保健物理 : hoken buturi 30(3), 227-237, 1995-09-30 

    Japan Health Physics Society

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各種コード

  • NII論文ID(NAID)
    10002135556
  • NII書誌ID(NCID)
    AN00228458
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    03676110
  • データ提供元
    CJP書誌  CJP引用  J-STAGE 
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