Nuclear Techniques ›› 2018, Vol. 41 ›› Issue (1): 10602-010602.doi: 10.11889/j.0253-3219.2018.hjs.41.010602

• NUCLEAR ENERGY SCIENCE AND ENGINEERING • Previous Articles     Next Articles

Simulation study of core W impurity concentration with Ne seeding for CFETR

WU Liang1, XU Guoliang1, ZHOU Yifu1, ZHANG Chuanjia1, MAO Shifeng1, LUO Zhengping2, GUO Yong2, PENG Xuebing2, YE Minyou1   

  1. 1 School of Nuclear Science and Technology, University of Science and Technology of China, Hefei 230026, China;
    2 Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
  • Received:2017-04-19 Revised:2017-06-01 Online:2018-01-10 Published:2018-01-06
  • Supported by:
    Supported by National Natural Science Foundation of China (No.11375191, No.11305216), National Magnetic Confinement Fusion Science Program of China (No.2014GB110000)

Abstract: Background: Due to unacceptable high erosion rate of low-Z material and the problem of tritium co-deposition, full-tungsten wall is excepted for future fusion reactor. However, the core tungsten concentration has to be limited to very low level of 10-5 due to its the high radiative cooling rate. China fusion engineering test reactor (CFETR) requires high-power steady-state operation, full tungsten wall is preferred. Purpose: This study aims to evaluate the core tungsten concentration for CFETR with full tungsten wall. Methods: Edge plasma simulation software scrape-off layer plasma simulation (SOLPS) is employed to simulate the edge plasma with different Ne seeding rates for the lower-single null configuration. With the simulated edge plasma as the background, Monte Carlo impurity transport code DIVertor and IMPurity (DIVIMP) is used to simulate the transportations of the impurity of tungsten. Results: When the Ne seeding rate is low and the target temperature keeps high, the simulated core tungsten concentration is too high to be considered. The contribution of tungsten target becomes acceptable when the target temperature is lower to about 10 eV; however, when the main chamber tungsten wall is included, the core tungsten concentration is still at the level of 10-4. Conclusion: The tungsten source from main chamber wall is the main cause of high core tungsten concentration when seeding impurity rate is high. The influence of tungsten wall on the core tungsten impurity should be further focused in future work.

Key words: CFETR, DIVIMP, Plasma-wall interaction, Numerical simulation, Tungsten impurity transport

CLC Number: 

  • TL62+7