Modelling air pollution around nuclear power plants: validation of dispersion models using tracer data

JOURNAL OF RADIOLOGICAL PROTECTION(2022)

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Abstract
The Sostanj exercise of the Modelling and Data for Radiological Impact Assessments I Urban Environments Working Group took advantage of a set of measurement data from a 1991 tracer experiment to test atmospheric dispersion models for emissions from point sources over complex terrain. The data set included emissions of SO2 from the stacks of the Sostanj Thermal Power Plant in Slovenia, measurements of the SO2 at a number of locations in the surrounding area up to 7 km from the plant, and meteorological data from several monitoring stations, all as measured half-hour average values. Two sets of meteorological conditions were modelled: (a) a simple situation with a strong wind blowing from a point source directly towards a monitoring station; and (b) a complex situation involving a temperature inversion and convective mixing. The modelling results enable the assessment of the capabilities of various dispersion models in handling both complex terrain and complex meteorological situations.
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Key words
dispersion modelling, tracer, nuclear power plant
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