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Deuterium trapping and release processes occuring in γ-irradiated solid breeder blanket materials

Carella, E.; Saavedra, R.; Morono, A.; Knitter, R. ORCID iD icon; Gonzalez, M.


Tritium (T) behavior in a breeder blanket is a key design issue because of its impact on safety and fuel-cycle best performance. Considering the difficulty in handling T, the validation of an alternative method is an issue. In an attempt to simulate T residence time (or T diffusion) in a DEMO-like ionizing environment, gas sorption-desorption experiments of deuterium (D) during ionizing radiation in breeder ceramics were carried out to elucidate the involved D2 or T trapping centers. A deconvolution method is here proposed for the identification of the release processes occurring at the different temperatures, therefore providing the basic information for identifying the nature of they-associated defects acting as D or T-trapping centers. The deuterium release in the EU-BB solid candidate material is studied in Li4 Si04 ceramics with variable LizTi03 content (pebble samples fabricated by KIT). The samples, previously dehydrated, are exposed to a deuterium atmosphere inside a pressurized steel capsule (I bar) during 25 days and immersed in the 6°Co Nayade facility located at CIEMAT. Deuterium desorption curves are then registered by means of Thermal Induced Desorption (TID) technique. ... mehr

Zugehörige Institution(en) am KIT Institut für Angewandte Materialien – Keramische Werkstoffe und Technologien (IAM-KWT1)
Publikationstyp Vortrag
Publikationsjahr 2015
Sprache Englisch
Identifikator KITopen-ID: 230102811
HGF-Programm 31.03.06 (POF III, LK 01) Brutblanket-Entwicklung
Veranstaltung 17th International Conference on Fusion Reactor Materials, Aachen, October 12- 16, 2015
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