Characterization and analysis of dusts produced in three experimental tokamaks: TFTR, DIII-D, and Alcator C-Mod

Particulate, referred to as 'dust', produced during operation of tokamak sy stems can be a large source of activated material in a D-T fusion machine. Particulate less than 10 mum in size is easily mobilized both during an acc ident as well as during routine maintenance activities. We have collected a nd analyzed dust samples from three tokamaks to determine the potential con tribution to accident source terms in future fusion power plants. We have o btained dust samples from Princeton Plasma Physics Laboratory's TFTR (prior to the final run period in 1997), from MIT's Alcator C-Mod (during March a nd April of 1998), and from General Atomics' DIII-D (August of 1998). This paper presents the results of our analyses for particle size distribution, specific surface area, and dust composition, including the tritium content of TFTR dust. (C) 2000 Published by Elsevier Science B.V.