Crystallization point

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Please improve this article if you can. (June 2007)

The characterization of highly radioactive materials is an important part of the overall optimization strategy for storage and treatment processes. An important parameter for this optimization is the crystallization temperature of liquid wastes. The measurement of crystallization temperatures of these materials is a challenging task and has been solved by the development and deployment of a bespoke imaging system.

The design philosophy of this instrument will be discussed, the approach taken described and the unique problems encountered during development highlighted. In outline, the instrument consists of:

  • A computer controlled unit that allows highly reproducible heating and cooling of a sample. This unit is contained in a heavily shielded facility
  • A vision system that images the sample remotely through the shield window.
  • Storage and analysis of the subsequent images.

Results obtained for model solutions will be described and examples from the preliminary studies of highly radioactive solutions given.

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