Journal
NUCLEAR MATERIALS AND ENERGY
Volume 31, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.nme.2022.101169
Keywords
Tritium; Deposition; Dust; Simulation
Categories
Funding
- National Key Research & Development Program of China [2018YFE0303103]
- National Natural Science Foundation of China [11705233, 11875287]
- 2nd JSPS-CAS Bilateral Joint Research Projects Workshop
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This study investigates the deposition behavior of tritium on dust using a hybrid particle simulation method. The results indicate that the size and specific surface area of the dust grains, as well as the electrostatic sheath induced by the dust, significantly influence the deposition and retention behavior of tritium.
Tritium deposition is a key issue for fusion devices. The existence of dust leads to increase of tritium deposition rates due to the large specific surface area (SSA) of dust grains. Experiments in JET-ILW have indicated that the deposition and retention behavior of hydrogen on dust grains is complicated. In present work, the deposition behavior of tritium on the dust is studied by a hybrid particle simulation method. Our results indicate that the large SSA of dust is not the only mechanism that increases tritium deposition. Dust size and the electrostatic sheath induced by the dust are also important factors that influence the tritium deposition. The retention rate enhanced by dust grains is also predicted based on our study.
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