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Nouvelle méthode de surveillance des travailleuses du nucléaire par anthroporadiamétrie : utilisation des calculs Monte Carlo associés aux fantômes déformables de type Mesh et NURBS

  • J. Farah (a1), D. Broggio (a1) and D. Franck (a1)

Abstract

Les mesures spectrométriques par anthroporadiamétrie, utilisées pour la surveillance des travailleurs exposés à des risques de contamination interne, permettent une estimation rapide et fiable de la nature des radionucléides incorporés ainsi que de leur activité. Les étalonnages typiques des systèmes de comptage dédiés aux mesures in vivo reposent sur l’utilisation de fantômes physiques d’un réalisme anatomique limité. Ce travail met en évidence l’intérêt des nouvelles technologies de l’infographie, en proposant de nouvelles représentations 3D graphiques afin d’optimiser la dosimétrie interne et de la surveillance des travailleuses du nucléaire par anthroporadiamétrie. Une librairie de modèles thoraciques féminins aux formats Mesh et NURBS (non uniform rational B-splines) a ainsi été développée et a permis la correction des coefficients d’étalonnages expérimentalement obtenus à l’aide du mannequin masculin Livermore. La variation de l’efficacité de comptage avec la morphologie du fantôme a ensuite été mise en équation. Cette équation permet d’éviter la création laborieuse d’un fantôme équivalent travailleuse et de s’affranchir des simulations Monte Carlo très coûteuses en temps. Après validation à l’aide de données simulées, cette équation a été utilisée pour déduire, à partir des mesures expérimentales Livermore, les efficacités de comptage pour toute travailleuse surveillée par anthroporadiamétrie

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Keywords

Nouvelle méthode de surveillance des travailleuses du nucléaire par anthroporadiamétrie : utilisation des calculs Monte Carlo associés aux fantômes déformables de type Mesh et NURBS

  • J. Farah (a1), D. Broggio (a1) and D. Franck (a1)

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