Measurement of Tritium on Surfaces

L. Rodrigo; M.J. Ivanco; J.W. Goodale; J.A. Senohrabek; L.K. Jones; L.M. Phillipi

doi:dx.doi.org/10.13182/FST95-A30526

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Measurement of Tritium on Surfaces

L. Rodrigo, M.J. Ivanco, J.W. Goodale, J.A. Senohrabek, L.K. Jones, L.M. Phillipi

Fusion Science and Technology / Volume 28 / Number 3P1 / October 1995 / Pages 940-945

Tritium Safety / Proceedings of the Fifth Topical Meeting on Tritium Technology in Fission, Fusion, and Isotopic Applications Belgirate, Italy May 28-June 3, 1995 / dx.doi.org/10.13182/FST95-A30526

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The quantitative significance of surface-contamination levels determined by different methods was assessed by carrying out measurements using the wipe-assay method and a commercial surface-contamination monitor (Whitlock Vacuum Scintillation Counter (VSC)). The results were compared to the total tritium desorbed from the sample. Simple correlations between these measurements were not found. Laser-assisted desorption methods are currently being investigated to measure total tritium on surfaces. Preliminary results obtained with a Nd:YAG laser (532 nm) are reported. Only water vapor and CO₂ were found in the gas released under laser irradiation by mass spectroscopy. Approximately 65–95% of the surface tritium could be desorbed from all metal samples investigated.