Does anybody know material suitable for underground civil engineering, like lined rubber sheets, which would be impermeable for tritium (HTO and HT)? We would like to use it to protect leaching and diffusion of tritium produced by secondary hadron cascades from accelerator areas in soil to groundwater in a shallow aquifer surrounding the hot zones.
I just try to check with zeolites Molecular Sieve beds and so on, but tritium always permeates even rafm steel...
Dear Pavol,
try geophysical methods to find if you have clays in zone study which are adequate to the retention of pollutants. Otherwise, create a natural barriers with clays.
Best for you
I will suggest for You to use the volume with double walls like condensator with
thickness 1-2cm filled with deionized water produced by small backward osmos
system making circle around your device.As for thickness it would depend upon
spead of tritium atom. Working mechanizm are: isotopic exchange and collisions with
anoms.
regards Oleg Zaimidoroga 23.03.15
Polymers typically break down over time due to the beta that is emitted from tritium, so I would hesitate to use rubber liners. The permeation rate through metals will largely depend on temperature. Oxides, such as erbium oxide and yttrium oxide have been used to reduce permeation by several orders of magnitude.
Dear colleagues, I was on a business trip with access to the internet but I was extremely busy. My infinite thanks for your answers!
Pavol
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