TY - JOUR
T1 - Numerical and experimental research to solve MHD problem in liquid blanket system
AU - Hashizume, Hidetoshi
N1 - Funding Information:
This research is partially supported by Japan Society for the promotion of Science, Grant-in-Aid for Scientific Research (B) (No. 15360487, 2003-2005) and by collaboration research program of National Institutes for Fusion Science (NIFS) on Fusion Engineering. The authors would like to express thank to Dr. K. Yuki, Dr. S. Chiba, Mr. M. Satake, Mr. T. Sato and Mr. T. Kobayashi of Tohoku University for giving me informative data and discussing many issues.
PY - 2006/2
Y1 - 2006/2
N2 - Thermofluid research issues relating to self-cooling liquid blanket system for fusion reactors are discussed to find ways to realize the system. In this paper, liquid Li and Flibe molten salt are chosen as the blanket coolants. For the Li blanket system, there exists some possibility to overcome MHD problem by using three-surface coated channel with multi-layer structure. The material properties in terms of electrical conductivity required for the innermost metal layer seems achievable together with new concept that the coated material works as the structural component of the innermost thin layer. In the case of Flibe coolant, which shows very small MHD pressure drop, electrolysis occurs to result in generation of fluorine and tritium. The numerical results show that this electrolysis can be suppressed by optimizing the channel geometry. Numerical and experimental results indicate that heat transfer enhancement using pebble beds is expected when the flow velocity is relatively small to reduce the MHD effect.
AB - Thermofluid research issues relating to self-cooling liquid blanket system for fusion reactors are discussed to find ways to realize the system. In this paper, liquid Li and Flibe molten salt are chosen as the blanket coolants. For the Li blanket system, there exists some possibility to overcome MHD problem by using three-surface coated channel with multi-layer structure. The material properties in terms of electrical conductivity required for the innermost metal layer seems achievable together with new concept that the coated material works as the structural component of the innermost thin layer. In the case of Flibe coolant, which shows very small MHD pressure drop, electrolysis occurs to result in generation of fluorine and tritium. The numerical results show that this electrolysis can be suppressed by optimizing the channel geometry. Numerical and experimental results indicate that heat transfer enhancement using pebble beds is expected when the flow velocity is relatively small to reduce the MHD effect.
KW - Insulator coating
KW - Liquid blanket
KW - MHD pressure drop
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U2 - 10.1016/j.fusengdes.2005.08.086
DO - 10.1016/j.fusengdes.2005.08.086
M3 - Conference article
AN - SCOPUS:32544445286
SN - 0920-3796
VL - 81
SP - 1431
EP - 1438
JO - Fusion Engineering and Design
JF - Fusion Engineering and Design
IS - 8-14 PART B
T2 - Proceedings of the Seventh International Symposium on Fusion Nuclear Technology ISFNT-7 Part B
Y2 - 22 May 2005 through 27 May 2005
ER -