Abstract
An interactive, real-time simulation model has been commissioned at the Koeberg nuclear power station near Cape Town. Use of sheared puffs, solved using only the C 00, C 01, C 10, C 02, C 20 and C 11 horizontal moments, reduced computation and allowed arbitrary variation of the wind vector with height. Wind profiles and diffusivity were given spatial definition about the coastal interface by interpolation between six telemetered mast locations within 20 km of Koeberg. Specific design for a real-time environment revealed important principles concerning division into asynchronous tasks, protection against data failures, and on-line operator interaction. With a grid resolution of 300 m in a 40 km × 40 km map area, the model runs at least three times faster than real-time on a HP3000 minicomputer.
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