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Experimental Investigation in Order to Determine Catalytic Package Performances in Case of Tritium Transfer from Water to Gas

Anisia Bornea, M. Peculea, M. Zamfirache, Carmen Varlam

Fusion Science and Technology / Volume 48 / Number 1 / July/August 2005 / Pages 116-119

Technical Paper / Tritium Science and Technology - Tritium Science and Technology - Detritiation, Purification, and Isotope Separation

The processes for hydrogen isotope's separation are very important for nuclear technology. One of the most important processes for tritium separation, is the catalyst isotope exchange water-hydrogen.

Our catalytic package consists of Romanian patented catalysts with platinum on charcoal and polytetrafluoretylene (Pt/C/PTFE) and the ordered Romanian patented package B7 type. The catalytic package was tested in an isotope exchange facility for water detritiation at the Experimental Pilot Plant from ICIT Rm.Valcea.

In a column of isotope exchange tritium is transferred from liquid phase (tritiated heavy water) in gaseous phase (hydrogen). In the experimental set-up, which was used, the column of catalytic isotope exchange is filled with successive layers of catalyst and ordered package. The catalyst consists of 95.5 wt.% of PTFE, 4.1 wt. % of carbon and 0.40 wt. % of platinum and was of Raschig rings 10 × 10 × 2 mm. The ordered package was B7 type consists of wire mesh phosphor bronze 4 × 1 wire and the mesh dimension is 0.18 × 0.48 mm.

We analyzed the transfer phenomena of tritium from liquid to gaseous phase, in this system.

The mass transfer coefficient which characterized the isotopic exchange on the package, were determined as function of experimental parameters.

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