6533b82efe1ef96bd12930ba

RESEARCH PRODUCT

Influence of chemisorption products of carbon dioxide and water vapour on radiolysis of tritium breeder

Regina KnitterA. ZarinsJuris TiliksGunta KizaneA. SupeLarisa BaumaneM.h.h. Kolb

subject

Materials scienceMechanical EngineeringDiffusionInorganic chemistrychemistry.chemical_elementchemistry.chemical_compoundBreeder (animal)Nuclear Energy and EngineeringchemistryChemisorptionRadiolysisHydroxideGeneral Materials ScienceTritiumLithiumOrthosilicateCivil and Structural Engineering

description

Abstract Lithium orthosilicate pebbles with 2.5 wt% excess of silica are the reference tritium breeding material for the European solid breeder test blanket modules. On the surface of the pebbles chemisorption products of carbon dioxide and water vapour (lithium carbonate and hydroxide) may accumulate during the fabrication process. In this study the influence of the chemisorption products on radiolysis of the pebbles was investigated. Using nanosized lithium orthosilicate powders, factors, which can influence the formation and radiolysis of the chemisorption products, were determined and described as well. The formation of radiation-induced defects and radiolysis products was studied with electron spin resonance and the method of chemical scavengers. It was found that the radiolysis of the chemisorption products on the surface of the pebbles can increase the concentration of radiation-induced defects and so could affect the tritium diffusion, retention and the released species.

yearjournalcountryeditionlanguage
2014-10-01Fusion Engineering and Design
https://doi.org/10.1016/j.fusengdes.2014.01.005