TY - JOUR
T1 - Evaluation of tritium leakage rate into seawater in fusion DEMO cooling water system
AU - The Joint Special Design Team for DEMO
AU - Miyoshi, Yuya
AU - Aoki, Akira
AU - Hiwatari, Ryoji
AU - Sakamoto, Yoshiteru
AU - Tobita, Kenji
N1 - Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2018/11
Y1 - 2018/11
N2 - The primary cooling water systems (CWS) of the blanket and the divertor is anticipated to have several amount of tritium because of permeation from the core plasma. In this research, the required performance of DEMO tritium removal facility to control the primary tritium concentration has been calculated and it is shown that existing devices can be applied to DEMO. The primary tritium is also anticipated to permeate the pipes to the downstream CWS and turbine system. Finally, tritium in turbine system permeates a condenser pipes and is leaked into seawater. The evaluation of tritium leakage rate into seawater has been done. Because of tritium transport model from water to water is not well known, gas to gas calculation model is used. The results show that a heat exchanger decreases the tritium permeation rate by 1 order of magnitude, and H2 addition to the upstream cooling water also decreases the tritium permeation rate by 3 orders of magnitude.
AB - The primary cooling water systems (CWS) of the blanket and the divertor is anticipated to have several amount of tritium because of permeation from the core plasma. In this research, the required performance of DEMO tritium removal facility to control the primary tritium concentration has been calculated and it is shown that existing devices can be applied to DEMO. The primary tritium is also anticipated to permeate the pipes to the downstream CWS and turbine system. Finally, tritium in turbine system permeates a condenser pipes and is leaked into seawater. The evaluation of tritium leakage rate into seawater has been done. Because of tritium transport model from water to water is not well known, gas to gas calculation model is used. The results show that a heat exchanger decreases the tritium permeation rate by 1 order of magnitude, and H2 addition to the upstream cooling water also decreases the tritium permeation rate by 3 orders of magnitude.
KW - Cooling water system
KW - DEMO design
KW - Plant system design
KW - Tritium permeation
UR - http://www.scopus.com/inward/record.url?scp=85047774522&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85047774522&partnerID=8YFLogxK
U2 - 10.1016/j.fusengdes.2018.05.060
DO - 10.1016/j.fusengdes.2018.05.060
M3 - Article
AN - SCOPUS:85047774522
SN - 0920-3796
VL - 136
SP - 1577
EP - 1580
JO - Fusion Engineering and Design
JF - Fusion Engineering and Design
ER -