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Fusion reactor is considered as one of the solutions for the sustaining development of nuclear energy. International Thermonuclear Experimental Reactor (ITER) is the biggest fusion reactor research plan in the world. High-intensity D-T fusion neutron generator can generate 14 MeV neutrons, and it matches the neutrons generated in ITER and be competently used for imitating the neutron environment in nuclear fusion reactor, which is important for the relevant experimental researches of blanket materials of fusion reactors. It can also be used for validating the correctness and reliability of the simulations and analyses in fusion basic studies, and can guide the subsequent material improvement and innovation of calculation methodology. A rotating tritium target system for D-T fusion neutron generator with a neutron yield of 1012 n·-1, i.e., a high intensity D-T fusion neutron generator, is proposed in this paper and the design, main parameters, technical difficulties and heat transfer enhancement method are introduced. The key and innovative technology of this rotating target system is the integration of the sprayed water cooling, mechanical seal and magnetic fluid seal technologies, which focuses on the heat transfer of the high heat power density in the target system. The most important technical index is that the maximum temperature on the target should not be above 200 ℃ as the tritium ions run away heavily from the tritium target when the target temperature is bigger than 200 ℃. To investigate the heat transfer characteristics of this rotating target system, the effects of water layer thickness, water flow rate and rotating speed on the heat transfer of this rotating target system are analyzed by computational fluid dynamics method. And the heat transfer processes of the target system under different heat power densities are also simulated and studied. The analysis results show that big water layer thickness, big water flow rate and high rotating speed are good for the heat transfer enhancement of the rotating target system, but the effects of the changes of the water layer thickness and water flow rate on the heat transfer process are both very small. Due to the design index, the heat power density on the target should be under a limit value, which is about 12 kW·cm-2 in the calculation results of this paper.
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Keywords:
- deuterium-tritium fusion /
- neutron generator /
- rotating target /
- heat transfer characteristics
[1] Wu Y C, FDS Team 2009 Fusion Engi. Des. 84 1987
[2] Wu Y C, FDS Team 2007 J. Nucl. Mater. 367 1410
[3] Wu Y C, FDS Team 2006 Fusion Engi. Des. 81 2713
[4] Wu Y C, FDS Team 2007 Nucl. Fusion 47 1533
[5] Wu Y C, FDS Team 2007 Fusion Engi. Des. 82 1893
[6] Wu Y C, Qian J, Yu J 2002 J. Nucl. Mater. 307 1629
[7] Wu Y C, FDS Team 2009 J. Nucl. Mater. 386 122
[8] Qiu L, Wu Y, Xiao B, Xu Q, Huang Q, Wu B, Chen Y, Xu W, Chen Y, Liu X 2000 Nucl. Fusion 40 629
[9] Wu Y C, FDS Team 2008 Fusion Engi. Des. 83 1683
[10] Wu Y C, Xie Z, Fischer U 1999 Nucl. Sci. Eng. 133 350
[11] Ramey D W, Adair H L 1983 IEEE Trans. Nucl. Sci. 30 1575
[12] Logan C M, Heikkinen D W 1982 Nucl. Instrum. Methods 1982 200 105
[13] Voronin G, Kovalchuk M, Svinin M, Solnyshkov A 1994 Proceedings of EPAC 94 London, UK, June 27-July 1, 1994 p2678
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[1] Wu Y C, FDS Team 2009 Fusion Engi. Des. 84 1987
[2] Wu Y C, FDS Team 2007 J. Nucl. Mater. 367 1410
[3] Wu Y C, FDS Team 2006 Fusion Engi. Des. 81 2713
[4] Wu Y C, FDS Team 2007 Nucl. Fusion 47 1533
[5] Wu Y C, FDS Team 2007 Fusion Engi. Des. 82 1893
[6] Wu Y C, Qian J, Yu J 2002 J. Nucl. Mater. 307 1629
[7] Wu Y C, FDS Team 2009 J. Nucl. Mater. 386 122
[8] Qiu L, Wu Y, Xiao B, Xu Q, Huang Q, Wu B, Chen Y, Xu W, Chen Y, Liu X 2000 Nucl. Fusion 40 629
[9] Wu Y C, FDS Team 2008 Fusion Engi. Des. 83 1683
[10] Wu Y C, Xie Z, Fischer U 1999 Nucl. Sci. Eng. 133 350
[11] Ramey D W, Adair H L 1983 IEEE Trans. Nucl. Sci. 30 1575
[12] Logan C M, Heikkinen D W 1982 Nucl. Instrum. Methods 1982 200 105
[13] Voronin G, Kovalchuk M, Svinin M, Solnyshkov A 1994 Proceedings of EPAC 94 London, UK, June 27-July 1, 1994 p2678
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