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Granulometry of Aerosols Containing Transuranium Elements in the Workplace: An Estimate Using Autoradiographic Analysis.

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Title: Granulometry of Aerosols Containing Transuranium Elements in the Workplace: An Estimate Using Autoradiographic Analysis.
Authors: FRITSCH, P.1 paul.fritsch@cea.fr, GUILLET, K.1
Source: Annals of Occupational Hygiene. 2002 Supplement, Vol. 46, p292-295. 4p.
Subjects: Atmospheric aerosols, Transuranium elements, Work environment, Electron microscopy, Autoradiography
Abstract: The aim of this study was to develop a new method to characterize the granulometry of actinide oxides collected in the workplace during the fabrication of MOX nuclear fuel according to the MIMAS process. The samples analysed were filters from the devices continuously collecting aerosols. The method is based on an autoradiographic analysis combined with an electron microscopy study. We report here the results obtained after pilot autoradiography experiments. After contact autoradiography (solid track detector CR39) particles containing a emitters were visualized as spots and localized on the filter. The activity of each spot was then measured by track counting after the optimal exposure time to obtain 30-300 tracks/spot. Particles from a few µBq to a few Bq were encountered. Assuming particles were industrial PuO2, activity median aerodynamic diameters calculated for four filters containing 131-500 spots were in the range 3.5-7.1 µm, with a geometric standard deviation of 1.6-1.7 µm. These values are similar to those measured in the workplace after using specific devices for granulometric measurement. Electron microscopy studies are in progress to validate the autoradiographic method and to characterize complex aerosols (UO2/PuO2 aggregates, MOX, etc.). [ABSTRACT FROM AUTHOR]
Copyright of Annals of Occupational Hygiene is the property of Oxford University Press / USA and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: <searchLink fieldCode="DE" term="%22Atmospheric+aerosols%22">Atmospheric aerosols</searchLink><br /><searchLink fieldCode="DE" term="%22Transuranium+elements%22">Transuranium elements</searchLink><br /><searchLink fieldCode="DE" term="%22Work+environment%22">Work environment</searchLink><br /><searchLink fieldCode="DE" term="%22Electron+microscopy%22">Electron microscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Autoradiography%22">Autoradiography</searchLink>
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  Data: The aim of this study was to develop a new method to characterize the granulometry of actinide oxides collected in the workplace during the fabrication of MOX nuclear fuel according to the MIMAS process. The samples analysed were filters from the devices continuously collecting aerosols. The method is based on an autoradiographic analysis combined with an electron microscopy study. We report here the results obtained after pilot autoradiography experiments. After contact autoradiography (solid track detector CR39) particles containing a emitters were visualized as spots and localized on the filter. The activity of each spot was then measured by track counting after the optimal exposure time to obtain 30-300 tracks/spot. Particles from a few µBq to a few Bq were encountered. Assuming particles were industrial PuO2, activity median aerodynamic diameters calculated for four filters containing 131-500 spots were in the range 3.5-7.1 µm, with a geometric standard deviation of 1.6-1.7 µm. These values are similar to those measured in the workplace after using specific devices for granulometric measurement. Electron microscopy studies are in progress to validate the autoradiographic method and to characterize complex aerosols (UO2/PuO2 aggregates, MOX, etc.). [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Annals of Occupational Hygiene is the property of Oxford University Press / USA and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1093/annhyg/46.suppl_1.292
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        Text: English
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      – SubjectFull: Atmospheric aerosols
        Type: general
      – SubjectFull: Transuranium elements
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      – SubjectFull: Work environment
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      – SubjectFull: Electron microscopy
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              Text: 2002 Supplement
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