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

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

doi:10.1016/j.pnucene.2021.103718

Cited by 4 publications

(1 citation statement)

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“…The vertical extension of plume, on the other hand, is largely limited in the troposphere where convections are confined within. There are many literatures on horizontal transport, dispersion, deposition processes and uncertainty analysis [2][3][4][5], but only in a handful of model development papers can one find details describing modelling approaches on turbulent mixing [6][7][8][9] regarding the vertical extension of radioactive plume in the free troposphere. The vertical extension of plume, however, is closely related to the vertical mass distribution of pollutants and thus affects the concentration level in lower atmosphere as well as horizontal distribution.…”

Section: Consequencesmentioning

confidence: 99%

The characteristics of the vertical distribution of radionuclide in free troposphere from simplified release scenarios: a case study

Sun,

Chung,

Dai

2024

Nucl. Sci. and Tech.

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Dose estimation in the upper air is not studied as much as on ground level or in boundary layer. However, there is a need from stakeholders in aviation industry for a reasonable estimation of the radioactive plume impact at cruising levels. This study aims to provide a quantitative estimation of the dose and how reliable it is for dispersion processes up to seven days. A Lagrangian atmospheric dispersion model is used to estimate quantitively the vertical extension of radionuclides from simplified hypothetical radionuclide release scenarios. Sources at different latitudes are selected for simulation in a boreal winter case. Three meteorological data are examined to test the sensitivity of vertical plume distribution to driving meteorological data. The vertical distribution of air concentration of radionuclides is investigated and the associated uncertainties are analysed. It is found that the vertical extension of plumes is sensitive to meteorological data being used where vertical turbulent velocities play an important role. It is therefore necessary to address the uncertainties of air concentration or dose in the free troposphere and caution must be taken when providing the results to stakeholders.

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