TY - JOUR
T1 - Influence of hydrogen addition to a sweep gas on tritium behavior in a blanket module containing Li2TiO3 pebbles
AU - Katayama, K.
AU - Someya, Y.
AU - Tobita, K.
AU - Fukada, S.
AU - Hatano, Y.
AU - Chikada, T.
N1 - Funding Information:
This work was supported by the Broader Approach Activities .
Publisher Copyright:
© 2016 Elsevier B.V.
Copyright:
Copyright 2016 Elsevier B.V., All rights reserved.
PY - 2016/12/1
Y1 - 2016/12/1
N2 - Hydrogen addition to a sweep gas of a solid breeder blanket module has been proposed to enhance tritium recovery from the surface of the breeders. However, the influence of hydrogen addition on the bred tritium behavior is not understood completely. Tritium behavior in the simplified blanket module of Li2TiO3 pebbles was numerically calculated considering diffusion in the grain bulk, surface reactions on the grain surface and permeation through the cooling pipe. Although a partial pressure of T2 increases with increasing a partial pressure of H2 in the sweep gas, it was estimated that tritium permeation rate to the cooling water decreases. Additionally, the release duration of water vapor generated by the reaction of the pebbles and hydrogen is shortened with increasing a partial pressure of H2. Tritium inventory in the grain bulk and the grain surface occupies 99.6 % of total tritium inventory in the blanket module.
AB - Hydrogen addition to a sweep gas of a solid breeder blanket module has been proposed to enhance tritium recovery from the surface of the breeders. However, the influence of hydrogen addition on the bred tritium behavior is not understood completely. Tritium behavior in the simplified blanket module of Li2TiO3 pebbles was numerically calculated considering diffusion in the grain bulk, surface reactions on the grain surface and permeation through the cooling pipe. Although a partial pressure of T2 increases with increasing a partial pressure of H2 in the sweep gas, it was estimated that tritium permeation rate to the cooling water decreases. Additionally, the release duration of water vapor generated by the reaction of the pebbles and hydrogen is shortened with increasing a partial pressure of H2. Tritium inventory in the grain bulk and the grain surface occupies 99.6 % of total tritium inventory in the blanket module.
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U2 - 10.1016/j.fusengdes.2016.08.031
DO - 10.1016/j.fusengdes.2016.08.031
M3 - Article
AN - SCOPUS:84994726589
SN - 0920-3796
VL - 113
SP - 221
EP - 226
JO - Fusion Engineering and Design
JF - Fusion Engineering and Design
ER -