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<p>This study combines the FLEXPART atmospheric transport model with the DELFT-3D marine hydrodynamic model to simulate the short-term dispersion of Cs-137 in the East Vietnam Sea following a hypothetical nuclear accident at the Fangchenggang Nuclear Power Plant. Atmospheric deposition from FLEXPART serves as the source term input for marine dispersion in DELFT-3D, enabling a comprehensive assessment of radionuclide transport across air and sea. The findings reveal rapid dispersion patterns influenced by atmospheric fallout and ocean currents, with notable accumulation in coastal zones and near river mouths, and a gradual decline offshore. This work highlights the value of integrating atmospheric and marine modeling approaches to understand radionuclide behavior, offering insights that can enhance emergency response strategies and environmental monitoring frameworks. The approach builds on prior studies of nuclear accident simulations, refining its application to the East Vietnam Sea context.</p>

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Simulating short-term dispersion of Cs-137 in the East Vietnam Sea: atmospheric fallout from a hypothetical nuclear accident as a source term

  • 期刊论文

  • 发表日期：

    2025年6月5日

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  • Quang-Thien Tran,
  • Duy-Vinh Vu,
  • Minh-Hai Nguyen,
  • Kim-Long Pham,
  • Xuan-Hai Nguyen,
  • Minh-Dao Nguyen,
  • Trong-Ngo Nguyen

摘要

This study combines the FLEXPART atmospheric transport model with the DELFT-3D marine hydrodynamic model to simulate the short-term dispersion of Cs-137 in the East Vietnam Sea following a hypothetical nuclear accident at the Fangchenggang Nuclear Power Plant. Atmospheric deposition from FLEXPART serves as the source term input for marine dispersion in DELFT-3D, enabling a comprehensive assessment of radionuclide transport across air and sea. The findings reveal rapid dispersion patterns influenced by atmospheric fallout and ocean currents, with notable accumulation in coastal zones and near river mouths, and a gradual decline offshore. This work highlights the value of integrating atmospheric and marine modeling approaches to understand radionuclide behavior, offering insights that can enhance emergency response strategies and environmental monitoring frameworks. The approach builds on prior studies of nuclear accident simulations, refining its application to the East Vietnam Sea context.