Tritium distributions on W-coated divertor tiles used in the third JET ITERlike wall campaign

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Hatano , Y , Lee , S E , Likonen , J , Koivuranta , S , Hara , M , Masuzaki , M , Asakura , N , Isobe , K , Hayashi , T , Ikonen , J , Widdowson , A , EUROfusion Consortium, JET & Ahlgren , T 2019 , ' Tritium distributions on W-coated divertor tiles used in the third JET ITERlike wall campaign ' , Nuclear Materials and Energy , vol. 18 , pp. 258-261 . https://doi.org/10.1016/j.nme.2019.01.001

Title: Tritium distributions on W-coated divertor tiles used in the third JET ITERlike wall campaign
Author: Hatano, Y.; Lee, S.E.; Likonen, J.; Koivuranta, S.; Hara, M.; Masuzaki, M.; Asakura, N.; Isobe, K.; Hayashi, T.; Ikonen, J.; Widdowson, A.; EUROfusion Consortium, JET; Ahlgren, Tommy
Contributor: University of Helsinki, Geological disposal of spent nuclear fuel
University of Helsinki, Department of Physics
Date: 2019-01
Language: eng
Number of pages: 4
Belongs to series: Nuclear Materials and Energy
ISSN: 2352-1791
URI: http://hdl.handle.net/10138/303547
Abstract: Tritium (T) distributions on tungsten (W)-coated plasma-facing tiles used in the third ITER-like wall campaign (2015-2016) of the Joint European Torus (JET) were examined by means of an imaging plate technique and beta-ray induced x-ray spectrometry, and they were compared with the distributions after the second (2013-2014) campaign. Strong enrichment of T in beryllium (Be) deposition layers was observed after the second campaign. In contrast, T distributions after the third campaign was more uniform though Be deposition layers were visually recognized. The one of the possible explanations is enhanced desorption of T from Be deposition layers due to higher tile temperatures caused by higher energy input in the third campaign.
Subject: 114 Physical sciences
Divertor
Tritium
Retention
Deposition
Radiation
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