Inter-comparison of transboundary atmospheric dispersion calculations: A summary of outputs from the ASEAN NPSR benchmark exercise

Kampanart Silva*, Piyawan Krisanungkura, Narakhan Khunsrimek, Wasin Vechgama, Tang Jia Hao, Vitesh Krishnan, Pham Kim Long, Tom Charnock, Somboon Rassame, Tay Bee Kiat, Chung Keng Yeow, Hoang Sy Than, Nguyen Hao Quang, Pham Duy Hien

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Previous nuclear power plant (NPP) severe accidents have raised great concern in Southeast Asia on the issue of transboundary atmospheric dispersion of an accidental release from an external NPP. This study presents the inter-comparison of atmospheric dispersion calculations performed by different calculation codes employing Lagrangian particle model or Gaussian puff model with Southeast Asia weather data during the northeast monsoon period. The test case is a hypothetical accident in Fangchenggang NPP with a hypothetical source term. Radionuclide concentration and radiation dose distribution maps along with specified values at specific locations are compared to demonstrate the similarities and differences of each calculation code. All calculation codes can generally capture the dispersion pathway, though only those employing Lagrangian particle model can record microscale changes in wind direction. Analysis of predicted exposure extent and lead time shows that radioactive plume contributing to the radiation dose of several μSv/day can reach one or more ASEAN countries within the 24-h timeframe. This information can be used to design appropriate risk communication strategy to dispel unnecessary public anxiety or to plan for more extensive radiation monitoring capability. For this purpose, Gaussian puff model can be used to provide initial information which can be later confirmed by Lagrangian particle model.

Original languageEnglish
Article number103718
JournalProgress in Nuclear Energy
Volume135
DOIs
Publication statusPublished - May 2021

Bibliographical note

Funding Information:
This study is partially funded by the ASEAN Science Technology and Innovation Fund (ASTIF) under the project entitled Enhancing ASEAN Research Competency in Nuclear Power Emergency Preparedness and Response. Several activities were also funded by the Office of the Ministry of Higher Education, Science, Research and Innovation, Thailand. Organizations to which each co-author belong were responsible for the remaining funding. The authors would like to thank the code developers of ARGOS, JRodos and Flexpart, i.e. PDC-ARGOS ApS. Karlsruhe Institute of Technology (KIT) and Norwegian Institute for Air Research (NILU), for the calculation codes used in the study. The authors also express gratitude to the experts in the Assessment of Exposures and Countermeasures in Urban Environments (Urban Exposures) Working Group (WG2) under the Modelling and Data for Radiological Impact Assessments (MODARIA II) program of the International Atomic Energy Agency (IAEA) who provided useful scientific advices to the study. A special thanks goes to Tamara Yankovich, the scientific secretariat of the MODARIA II WG2 who continuously offers helpful suggestions in coordinating an international research project which led to the success of this project.

Funding Information:
This study is partially funded by the ASEAN Science Technology and Innovation Fund (ASTIF) under the project entitled Enhancing ASEAN Research Competency in Nuclear Power Emergency Preparedness and Response. Several activities were also funded by the Office of the Ministry of Higher Education, Science, Research and Innovation, Thailand . Organizations to which each co-author belong were responsible for the remaining funding.

Publisher Copyright:
© 2021

Keywords

  • ASEAN NPSR
  • Atmospheric dispersion
  • Emergency response
  • Long-range
  • Transboundary

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