船用堆滨海复杂地形及海上放射性大气扩散模型研究

Study of atmospheric diffusion model of radioactivity of ship reactor at coastal complex terrain or on sea

对船用堆滨海复杂地形及海上放射性大气扩散模型的研究是制订滨海复杂地形及海上核应急计划的基础。首先,对滨海复杂地形评价区的气象资料进行了技术处理和分析研究,验证了所选取的气象要素的合理性以及在其基础上进行大气扩散分析的可行性;然后,结合船用堆的特点,研究了滨海复杂地形及海上评价区大气扩散参数的确定方法;最后,计算分析了滨海复杂地形及海上评价区烟羽抬升的特点,以及不同大气稳定度条件下烟羽的抬升高度。结果表明:该研究对船用堆在滨海复杂地形利用高斯分段烟羽模型进行大气扩散研究具有一定的指导作用。

Study of atmospheric diffusion model of radioactivity of ship reactor at coastal complex terrain or on sea is the basis of establishing the emergency plan.Firstly,through technical treatment and analysis of the weather data at coastal complex terrain,the rationality of the selected weather element and the feasibility of the atmospheric dispersion analysis were verified.And then,in light of the ship reactor′s characteristics,determination method of atmospheric diffusion parameter was researched about the evaluation zone of coastal complex terrain and the sea.Lastly,characteristic and height of the plume ascending in different atmosphere stability was calculated and analyzed,and thus the problem about the use of Gaussian segmented plume model at coastal complex terrain was solved.