Summary
More sophisticated models are now available to simulate dispersal of accidental radioactive releases to the atmosphere; these use mass-consistent windfields and attempt allowance for site-specific topographical features. Our aim has been to examine these techniques critically, develop where possible, and assess limitations and accuracy. The resulting windfield model WAFT uses efficient numerical techniques with improved orographic resolution and treatment of meteorological conditions. Time integrated air concentrations, dry and wet deposition are derived from TOMCATS, which applies Monte-Carlo techniques to an assembly of pseudo-particles representing the release, with specific attention to the role of large eddies and evolving inhomogeneous rainfields. These models have been assessed by application to hypothetical releases in complex terrain using data which would have been available in the event of an accident, and undertaking sensitivity studies. It is concluded that there is considerable uncertainty in results produced by such models; although they may be useful in post-facto analysis, such limitations cast doubt on their advantages relative to simpler techniques, with more modest requirements, during an actual emergency.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Dickersen, M. et al (1974). A Concept for Atmospheric Release Advisory Capability. Lawrence Livermore Laboratory unnumbered report
CNEN-DISP. (1981). ARIES — First Progress Report. RT1-AMB.
Apsinon, H. M., Kitson, K., Fawcett, M., Goddard, A. J. H. (1984). Development of a Prototype Msoscale Computer Model Incorporating Treatment of Topography. Final Report CEC Contract SR 014 UK.
Sherman, C. (1978). A mass-consistent model for windfields over complex terrain. Journal Applied Meteorology 17. P 312 – 319.
Courant and Hilbert. (1953). Methods of Mathematical Physics Vol 1. Published by J. Wiley & Sons.
Keijerink, J. A. and Van Der Worst. (1977). An iterative solution method for linear systems of which the coefficient matrix is a Symmetric M-Matrix. Mathematics of Computation, 31. No137. P 148 - 162.
Llewellen et al. (1982). The evaluation of MATHEW/ADPIC as a real time dispersion model. NUREG ICR-2199. ARAP report no 442.
Lance, R. (1973). ADPIC — A 3-dimensional transport-diffusion model for the dispersal of atmospheric pollutants and its validation against regional tracer studies. Journal Applied Meteorology. 17. P320 - 329.
Janicke, L. (1981). Particle Simulation of Inhomogenious Turbulent Diffusion. Proc. 12th. NATO/CCHS. Meeting Air Pollution Modelling and its Application.
Hanna, S. (1981). Diurnal variation of horizontal wind direction fluctuations in complex terrain at Geysers. Cal. Boundary Layer Meteorology 21. P207 - 213.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1985 ECSC, EEC, EAEC, Brussels and Luxembourg
About this paper
Cite this paper
Apsimon, H.M., Goddard, A.J.H., Kitson, K., Fawcett, M. (1985). Development of a Protoype Mesoscale Computer Model Incorporating Treatment of Topography. In: Skupinski, E., Tolley, B., Vilain, J. (eds) Safety of Thermal Water Reactors. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-4972-0_36
Download citation
DOI: https://doi.org/10.1007/978-94-009-4972-0_36
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-8701-8
Online ISBN: 978-94-009-4972-0
eBook Packages: Springer Book Archive