Fusion Science and Technology / Volume 48 / Number 1 / July/August 2005 / Pages 366-369
Technical Paper / Tritium Science and Technology - Tritium Measurement, Monitoring, and Accountancy / dx.doi.org/10.13182/FST05-A944
Passive diffusion samplers have now been in use in the UK for the measurement of tritium at environmental levels in the form of HTO and HTO + HT for more than ten years. At the outset their main purpose was to identify the direction of a possible inadvertent release of tritium into the environment. More recently, however, there has been growing interest in their use as stand-alone devices for tritium determination at environmental levels. This has necessitated a more rigorous design to reduce the "draughts effect" in exposed locations and has also required modifications to enable the measurement of HTO + HT.
The paper describes the recent design improvements and the results of validation tests carried out against dynamic, discriminating (dry-bed) samplers.