目前，电离辐射对生物产生的影响开始受到越来越多的关注，对生物辐射效应进行评价首先要估算生物所受到的辐射剂量率。RESRAD-BIOTA程序基于美国能源部（USDOE）技术标准DOE-STD-1153-2002中的分级（graded）方法，可以计算环境中生物受到的辐射剂量率。针对该程序的不足之处对其进行了改进，将改进后的程序用于中国某滨海核电厂厂址附近水生生物辐射剂量率的评估中，并对程序的应用进行了初步研究，最后讨论了程序应用中需要注意的问题。

At present, the effects of ionizing radiation on biota have not been well studied. The evaluation of radiological dose ratio is the basis in analyzing biological radiation effect. RESRAD-BIOTA program is based on a graded approach of Technical Standard DOE-STD-1153-2002 by U.S. Department of Energy (USDOE), and can be used to calculate radiological dose ratio of biota in nuclear environment. RESRAD-BIOTA program is modified to evaluate radiation dose rate of radioactive liquid for aquatic biota near a Chinese nuclear power plant in coastal area, and the results are analyzed. The future applications of the program are discussed.