某拟建滨海核电厂址大气扩散规律初探

本文介绍了在我国东部沿海某拟建核电厂址进行的大气扩散试验的概况和主要结果，包括现场试验和风洞模拟实验。现场试验主要有：百米气象铁塔四个高度整年风、温逐时观测；地面风场、海陆风及热内边界层的观测与分析；SF6示踪试验与湍流测量等。在现场试验基础上尝试提出了计算滨海核电厂址年均大气扩散因子的模型。该模型既考虑了向岸流与离岸流的区别，又考虑了混合层与热内边界层、混合释放与扩散参数随陆距变化等综合影响因素。

PRELIMINARY STUDY OF ATMOSPHERIC DISPERSION ON THE PROPOSED SITE OF COASTAL NUCLEAR POWER PLANT

An atmospheric dispersion experiment was conducted for a proposed nuclear power plant located in coastal site of the east part of China. This paper reports the results concerned with the characteristics of the profiles at a 100 m meteorological tower, the ground wind field, the thermal internal boundary layer and the dispersion parameters based on the analysis of SF 6 tracer test and measuring data of turbulence and physical simulations performed in an environmental wind tunnel. A new model is developed for estimating the annua1 mean atmospheric dispersion factor for a coastal site of nuclear power p1ant. In the model the differences between on-shore and offshore flows are considered, the comprehensive effect of the mixed layer and TIBL, variation of mixing release and diffusion parameters with the distance from coast are also considered.