Comparison of tritium measurement techniques for a laser cleaned JET tile

C. Stan-Sion, M. Enachescu, A.R. Petre, M. Duma, D.G. Ghita, G. Kizane, L. Baumane, J. Gabrusenoks, M. Halitovs, L. Avotina, A. Zarins, Jari Likonen (Corresponding Author), Seppo Koivuranta, M. Kiisk, JET-EFDA Contributors

    Research output: Contribution to journalArticleScientificpeer-review

    6 Citations (Scopus)

    Abstract

    Over the last 7-8 years, two quantitative analyzing methods-accelerator mass spectrometry (AMS) and full combustion (FC) followed by scintillation detection have been applied for determining the tritium activity concentrations in JET divertor tiles. These methods have two main differences - the range of detection and the spatial resolution - and are thus complementary. However, these differences can also complicate the comparison of the two techniques for typical JET divertor samples. Therefore a cross comparison exercise for tritium measurements was performed between the two methods using specially produced identical standard samples. The cross comparison measurements were performed firstly on the identical standard samples and were extended then to selected samples from the JET divertor tile (laser treated and non-treated samples from tile 14ING3B exposed in 2001-2004). The results obtained by AMS and FC agreed within an error limit of 10% for the standard samples and of 18% for the JET divertor samples. The results of this comparison study provided also useful information concerning the efficiency of tritium removal from the plasma facing surface of the divertor tiles by means of laser ablation.
    Original languageEnglish
    Pages (from-to)2628-2634
    Number of pages7
    JournalFusion Engineering and Design
    Volume89
    Issue number11
    DOIs
    Publication statusPublished - 2014
    MoE publication typeA1 Journal article-refereed

    Keywords

    • accelerator mass spectometry
    • full combustion
    • tritium retention
    • tokamaks

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