AN EXPERIMENTAL-STUDY OF METEOROLOGICAL DISPERSION IN SITING PHASE-IIAND PHASE-III OF THE QINSHAN NUCLEAR-POWER-PLANT

The Qinshan nuclear power plant (NPP) is one of China's nuclear power bases. An atmospheric experiment concerning siting of Qinshan NPP phas e II is outlined and described. Hourly meteorological data were taken for I yr (from October 31, 1991 to October 31, 1992) at five different heights of a 100-m-high tower Observations using a low-altitude radio sonde and a lost balloon were made for 40 days at three sites to measu re the variance of turbulence at different heights and different dista nces from the coast. The diffusion parameters of the phase II site wer e measured using photographs of the plume and flight tests of the bala nce balloon. A wind tunnel simulation test was done to modify the infl uence of buildings on the diffusion parameters under D stable conditio ns, Synchronous low-altitude-wind, temperature, and surface-wind-field observations were made at three sites (phases I, II, and III) during September and October 1995 to provide a basic date for siting phase II I. A method to estimate the annual atmospheric dispersion factor for a new site (phase III) using the available I yr of hourly meteorologica l observation data for an operating NPP (phase I) based on a meteorolo gical correlation experiment is presented.