An approach to assess the consequence of a hypothetical radionuclide release in Singapore - a densely populated urban setting

Siao Yang Chai1, Xiangming Sun1
1 Singapore Nuclear Research and Safety Initiative (SNRSI)

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This study is to demonstrate an approach to investigate the consequence of a hypothetical radionuclide release scenario in Singapore, a typical urban setting with high population density. To this end, we made use of MACCS 4.1, a Gaussian-based atmospheric dispersion model to compute the peak dose and the population health effects. We developed the meteorological and site files from data provided by local government agencies. Our investigation showed that the chosen scenario poses very little to negligible risk to the health of local population as the peak dose received across the country is below the radiation safety level recommended by ICRP.

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[1]. Omar, N., Koh, M-H., Hashim, S., “Radiological dose assessment due to hypothetical nuclear power plant operation in Mersing, Johor, Malaysia”. Malaysian Journal of Fundamental and Applied Science., 2019, 15, (4), pp. 532-536.
[2]. Rosli, R., et al., “Atmospheric trajectory analysis of Cesium-137 from proposed nuclear power plant site in Bangka Island, Indonesia”. J. Phys.: Conf. Ser., 2021, 2053, 012010.
[3]. Silva, K., et al., “Preliminary results of consequence assessment of a hypothetical severe accident using Thai meteorological data”. J. Phys.: Conf. Ser., 2017, 860, 012039.
[4]. Bogorad, V., Lytvynska, T. , Bielov, Ia., “Comparative analysis of calculation possibilities of MACCS and RODOS computer codes for tasks of emergency response and analysis of radiation consequences of severe accidents at NPPs”. Nuclear and Radiation Safety, 2017, 1, (73), pp. 56-61.
[5]. Clayton, D.J., Bixler, N.E., Compton, K.L., “HYSPLIT/MACCS Atmospheric Dispersion Model Technical Documentation and Benchmark Analysis”. Sandia Report/SAND2022-5515, Sandia National Laboratories, April 2022.
[6]. Jang, S-C., Kim, S-Y., Lee, S-H., “Development of the GIS-based Population Data Conversion Program, POPCON”. Transaction of the Korean Nuclear Society Virtual Spring Meeting, Jeju, Korea, May 13-14, 2021.
[7]. Park, H., Kim, S-Y., Jang, S-C., “Validation& Verification of GIS-Based Population Data Conversion Program (POPCON)”. Transaction
of the Korean Nuclear Society Virtual Spring Meeting, Jeju, Korea, May 13-14, 2021.
[8]. Hersbach, H, et. al., The ERA5 global reanalysis, Q. J. R. Meteorol. Soc., 2020, 146, pp. 1999-2049.
[9]. Turner, D.B., A diffusion model for an urban area. J. Appl. Meteor., 1964, 3. pp. 83-91. U.S. Environmental Protection Agency, (EPA), “White Paper on Bt plant-pesticide resistance management”. (Publication 739-S-98-001, EPA, 1998;
[10]. List, R. J. 1966. Smithsonian Meteorological Tables, Sixth Revised Edition (Third Reprint). Smithsonian Institution, Washington, D. C.