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Plutonium partitioning among internal organs.

R G Thomas, J W Healy, J F McInroy

    Health Physics
    |April 1, 1984
    PubMed
    Summary
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    Accurate plutonium distribution models require understanding its partitioning in the body. A 70-30% split between skeleton and liver is recommended for plutonium organ distribution, with other organs comprising less than 3%.

    Area of Science:

    • Radiological protection
    • Toxicology
    • Biokinetics

    Background:

    • Estimating organ radiation dose requires accurate plutonium partitioning data.
    • Current translocation coefficients for plutonium need analysis.

    Purpose of the Study:

    • To analyze coefficients for plutonium translocation from blood to organs and excreta.
    • To establish appropriate plutonium distribution percentages for organ dose models.

    Main Methods:

    • Review of data from 257 experimental animal studies.
    • Analysis of data from 169 human autopsy cases.

    Main Results:

    • A recommended plutonium distribution of 70% to the skeleton and 30% to the liver.
    • Other organs and early excreta account for less than 3% of the early body burden.

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  • Significant variability in plutonium distribution across all compartments.

    • Conclusions:

    • The proposed coefficients are adequate for estimating average organ doses in exposed populations.
    • Estimating individual organ doses using these coefficients may yield uncertain results due to distribution variability.