期刊
NUCLEAR MATERIALS AND ENERGY
卷 17, 期 -, 页码 295-301出版社
ELSEVIER
DOI: 10.1016/j.nme.2018.11.008
关键词
Beryllium oxide; Beryllium deuteroxide; D trapping; Melting
资金
- Euratom research and training programme [633053]
Beryllium oxide (BeO) and deuteroxide (BeOxDy) have been found on the melted zone of a beryllium tile extracted from the upper dump plate of JET-ILW (2011-2012 campaign). Results have been obtained using Raman microscopy, which is sensitive to both the chemical bond and crystal structure, with a micrometric lateral resolution. BeO is found with a wurtzite crystal structure. BeOxDy is found as three different types which are not the beta-phase but behaves as molecular species like Be(OD)(2), O(Be-D)(2) and DBeOD. The presence of a small amount of trapped D2O is also suspected. Our results therefore strongly suggest that D trapping occurs after melting through the formation of deuteroxides. The temperature increase favors the formation of crystal BeO which favors deuterium trapping through OD bonding.
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