[mpyne]

Tritium betas are about 0.005 MeV, not 1.000, and can penetrate only 6mm of air. The only real threat from tritium is ingestion where you don't have air or dead skin layer to block them, but even then they would have to be present in vast, vast quantities to receive appreciable dose from them.

[asharp]

What is nicer is that your body naturally replaces most of its water every few days, so you arn't stuck like you would be with say sr-90 trying very hard to embed itself in your bones :(