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| Azevedo, Nuno Monteiro |
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Gensdarmes, Francois
in Cooperation with on an Cooperation-Score of 37%
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Publications (5/5 displayed)
- 2020Dust sampling in WEST and tritium retention in tokamak-relevant tungsten particlescitations
- 2020Contribution of Atomic force Microscopy to particle resuspension studies
- 2019Influence of the beta energy decay spectrum and particle size on the aerosol specific self-charging rate of radioactive aerosol
- 2019Evaluation of the nose-to-brain transport of different physico-chemical forms of uranium after exposure via inhalation of a UO4 aerosol in the ratcitations
- 2010A TEM-based method as an alternative to the BET method for measuring off-line the specific surface area of nanoaerosolscitations
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article
Dust sampling in WEST and tritium retention in tokamak-relevant tungsten particles
Abstract
The paper presents complementary approaches based on experimental and numerical works to address the behavior of tokamak-relevant tungsten particles loaded with tritium. Sampling of particles inside the WEST tokamak have been realized thanks to an in situ particle collection system called Duster Box. This method allowed to identify various types of tungsten particles among them spherical shaped micro-particles between 5 µm and 30 µm in diameter. Based on these results a surrogate tungsten powder has been provided by means of spheroidization process and sieving method. Moreover, the powder tritium retention capacity was measured and specific activities of 90 MBq.g−1 and 280 MBq.g−1 were obtained for particles with 17 µm and 11.5 µm median diameters, respectively. Considering such tritium activities trapped in the particles, Monte-Carlo simulation were performed to estimate the electrostatic self-charging rates and the corresponding electrical charge carried by the radioactive tungsten dust. The results of these experiments provide robust data for the assessment of the dispersion of toxic/radioactive material in the environment that could follow a loss of containment.