Estimation of China Fusion Engineering Test Reactor performance and burning fraction in different pellet fueling scenarios by a multi-species radial transport model

Journal Article · 17 May 2022 · Plasma Science and Technology

DOI: https://doi.org/10.1088/2058-6272/ac47f6 · OSTI ID:1885113

Lin, Weisheng ^[1]; Wang, Xiaogang ^[2]; Xu, Xueqiao ^[3]; Kong, Defeng ^[4]; Wang, Yumin ^[4]; Chen, Jiale ^[4]; Wang, Zhanhui ^[5]; Xiao, Chijie ^[1]

---

1. Peking Univ., Beijing (China)
2. Harbin Institute of Technology (China)
3. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
4. Chinese Academy of Sciences (CAS), Hefei (China)
5. Southwestern Institute of Physics, Chengdu (China)

Tritium self-sufficiency in future deuterium–tritium fusion reactors is a crucial challenge. As an engineering test reactor, the China Fusion Engineering Test Reactor requires a burning fraction of 3% for the goal to test the accessibility to the future fusion plant. To self-consistently simulate burning plasmas with profile changes in pellet injection scenarios and to estimate the corresponding burning fraction, a one-dimensional multi-species radial transport model is developed in the BOUT++ framework. Here several pellet-fueling scenarios are then tested in the model. The results show that the increased fueling depth improves the burning fraction by particle confinement improvement and fusion power increase. Nevertheless, by increasing the depth, the pellet cooling-down may significantly lower the temperature in the core region. Taking the density perturbation into consideration, the reasonable parameters of the fueling scenario in these simulations are estimated as pellet radius $${r}_{{\rm{p}}}=3\,{\rm{mm}},$$ injection rate $$=\,4\,\mathrm{Hz},$$ and pellet injection velocity $$=\,1000\mbox{-}2000\,{\rm{m}}\,{{\rm{s}}}^{-1}$$ without drift or $$450\,{\rm{m}}\,{{\rm{s}}}^{-1}$$ with high-field-side drift.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA); National Natural Science Foundation of China (NSFC); National Key Research and Development Program of China
• Grant/Contract Number: AC52-07NA27344
• OSTI ID: 1885113
• Report Number(s): LLNL-JRNL-839225; 1060006
• Journal Information: Plasma Science and Technology, Journal Name: Plasma Science and Technology Journal Issue: 5 Vol. 24; ISSN 1009-0630
• Publisher: IOPScienceCopyright Statement
• Country of Publication: United States
• Language: English