TY - JOUR
T1 - Study on Tritium Permeation from the Primary to the Secondary Water Coolant for Fusion Reactors
AU - Ipponsugi, Akito
AU - Katayama, Kazunari
AU - Matsumoto, Taku
AU - Iwata, Shogo
AU - Oya, Makoto
AU - Someya, Youji
N1 - Publisher Copyright:
© 2023 American Nuclear Society.
PY - 2024
Y1 - 2024
N2 - Several fusion plants plan to utilize two high-temperature and high-pressurized water coolant systems. Because of the high hydrogen-isotope mobility in high-temperature metal, tritium will inevitably transfer from the plasma side to the secondary coolant through the primary coolant. From the viewpoints of fuel control, tritium safety, and social acceptance, it is compulsory to investigate the tritium concentration dependence of permeation phenomena experimentally. Therefore, this study conducted a protium permeation experiment instead of tritium, which mocked the situation where the tritium concentration in the primary loop was extremely high. Considering the results in the previous tritium permeation research by the present authors, the tritium permeation behavior was likely proportional to the first power of the tritium concentration. Then, based on these experiments and references regarding the tritium permeation rate and water detritiation system (WDS) design, tritium concentration was computed in both loops. In this calculation condition, the primary and secondary loops reached about 0.4 TBq/kg and 167 MBq/kg during 3-year operations, respectively. Also, it was found that the required feed rate to keep the tritium concentration at 1 TBq/kg was 46.5 kg/h, which is less than the existing WDS specification.
AB - Several fusion plants plan to utilize two high-temperature and high-pressurized water coolant systems. Because of the high hydrogen-isotope mobility in high-temperature metal, tritium will inevitably transfer from the plasma side to the secondary coolant through the primary coolant. From the viewpoints of fuel control, tritium safety, and social acceptance, it is compulsory to investigate the tritium concentration dependence of permeation phenomena experimentally. Therefore, this study conducted a protium permeation experiment instead of tritium, which mocked the situation where the tritium concentration in the primary loop was extremely high. Considering the results in the previous tritium permeation research by the present authors, the tritium permeation behavior was likely proportional to the first power of the tritium concentration. Then, based on these experiments and references regarding the tritium permeation rate and water detritiation system (WDS) design, tritium concentration was computed in both loops. In this calculation condition, the primary and secondary loops reached about 0.4 TBq/kg and 167 MBq/kg during 3-year operations, respectively. Also, it was found that the required feed rate to keep the tritium concentration at 1 TBq/kg was 46.5 kg/h, which is less than the existing WDS specification.
KW - Inconel 600
KW - Tritium permeation
KW - protium permeation
KW - water detritiation system
KW - water to water
UR - http://www.scopus.com/inward/record.url?scp=85176149691&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85176149691&partnerID=8YFLogxK
U2 - 10.1080/15361055.2023.2271228
DO - 10.1080/15361055.2023.2271228
M3 - Article
AN - SCOPUS:85176149691
SN - 1536-1055
VL - 80
SP - 253
EP - 259
JO - Fusion Science and Technology
JF - Fusion Science and Technology
IS - 3-4
ER -