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This paper presents the Radiological Impact Assessment and Emergency Decision Support System (RIES) for nuclear emergency response. RIES comprises preprocessing, wind field calculation, radionuclide atmospheric dispersion, and evacuation path planning. The California Meteorological Model (CALMET) generates diagnostic wind fields, while the Lagrangian splitting puff dispersion model (SPUFF) computes radiation fields. Inputs for CALMET and SPUFF are prepared by a preprocessor that also supports Weather Research and Forecasting Model (WRF) outputs. Evacuation path planning employs the A* algorithm. The paper first outlines RIES’s theoretical framework. Subsequently, two real scenarios at nuclear power plant sites (the Belgium field experiment and the Fukushima accident) are used to evaluate the performance and practicality of RIES, respectively. Finally, the full calculations of RIES are presented in detail via a hypothetical nuclear accident scenario that occurred in highly complex terrain.

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RIES, a Comprehensive System Incorporating Radiological Risk Assessment and Emergency Strategy Support for Severe Nuclear Accident

  • 会议论文

  • 发表日期：

    2026年

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  • Li Yang,
  • Cunyou Wang,
  • Jiayue Song,
  • Huanting Li,
  • Zhaoyang Wang,
  • Xinpeng Li,
  • Sheng Fang,
  • Yixue Chen

摘要

This paper presents the Radiological Impact Assessment and Emergency Decision Support System (RIES) for nuclear emergency response. RIES comprises preprocessing, wind field calculation, radionuclide atmospheric dispersion, and evacuation path planning. The California Meteorological Model (CALMET) generates diagnostic wind fields, while the Lagrangian splitting puff dispersion model (SPUFF) computes radiation fields. Inputs for CALMET and SPUFF are prepared by a preprocessor that also supports Weather Research and Forecasting Model (WRF) outputs. Evacuation path planning employs the A* algorithm. The paper first outlines RIES’s theoretical framework. Subsequently, two real scenarios at nuclear power plant sites (the Belgium field experiment and the Fukushima accident) are used to evaluate the performance and practicality of RIES, respectively. Finally, the full calculations of RIES are presented in detail via a hypothetical nuclear accident scenario that occurred in highly complex terrain.