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Dynamic modelling and control system design of micro-high-temperature gas-cooled reactor with helium brayton cycle

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  • Qiu, Leilei
  • Liao, Shengyong
  • Fan, Sui
  • Sun, Peiwei
  • Wei, Xinyu

Abstract

It is possible to use the micro-high-temperature gas-cooled reactor with helium Brayton cycle (Mi-HTR) as a mobile micro-nuclear power source to provide a stable power supply. Because the Mi-HTR is a highly integrated system, the devices involved are highly coupled and mutually constrained. Therefore, the dynamic model of 5 MW Mi-HTR was established through theoretical derivation. Compared with the design value, the maximum error of steady-state calculation results is less than 2%, and the temperature error is less than 1 K. The transient behaviour is consistent with the experimental trend. The maximum relative error of flow is less than 1.5%, and the maximum relative error of pressure is less than 2.8%. On this basis, the characteristics of Mi-HTR such as large time delay, nonlinear, strong coupling and parameter time-varying are obtained by analysing the dynamic characteristics. The steady-state operation scheme of Mi-HTR is proposed. The reactor outlet helium temperature control, the electric power/rotor speed control, and the precooler/intercooler outlet helium temperature control are designed. A dynamic control model for Mi-HTR is established. The designed control system can cope with the 33% step change of external load.

Suggested Citation

  • Qiu, Leilei & Liao, Shengyong & Fan, Sui & Sun, Peiwei & Wei, Xinyu, 2023. "Dynamic modelling and control system design of micro-high-temperature gas-cooled reactor with helium brayton cycle," Energy, Elsevier, vol. 278(PB).
    • Handle: RePEc:eee:energy:v:278:y:2023:i:pb:s036054422301424x
    DOI: 10.1016/j.energy.2023.128030
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    3. Zhang, Ru & Qiu, Leilei & Sun, Peiwei & Wei, Xinyu, 2024. "Research on nuclear reactor power control system of VVER-1000 with thermal energy supply system," Energy, Elsevier, vol. 294(C).

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