Positron emission tomography in pebble beds. Part 2: Graphite particle deposition and resuspension
作者： T. Barth , J. Kulenkampff , S. Bras , M. Gründig , J. Lippmann-Pipke
DOI: 10.1016/J.NUCENGDES.2013.07.015
关键词:
摘要: Abstract The release of radio-contaminated carbonaceous dust from the pebble bed a high temperature reactor (HTR) plays major role for safety assessment accidental scenarios. In present investigation, graphite particle deposition and resuspension in fluid dynamically scaled HTR was studied by means positron emission tomography (PET). laden turbulent flow model generated an air driven small-scale test facility at ambient conditions. geometry recorded 3D gamma ray computed (CT) scan. Technical radioactively labelled dispersed into field facility. scenarios were adapted to study succession. Firstly, radio-labelled particles low velocities multilayer formation during pure regime. Afterwards, aerosol generator switched off fan speed stepwise increased induce resuspension. A time resolved PET-CT overlay provides complete insight removal. Similarities other studies flows found.
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