中文摘要：

室内氡浓度主要决定于室内表面平均氡析出率、室外氡浓度及换气率这三个参数。该文建立了室内氡浓度与室内表面平均氡析出率关系的模型;在不同换气率及室外氡浓度条件下,计算了室内表面平均氡析出率的上限使得室内氡浓度不超过100Bqm^（-3）。对中国南、北地区室外空气氡浓度,年平均换气率进行分析后,计算得到的室内表面平均氡析出率阈值可以统一定为31Bq.m-2.h-1。该文还分析了累积法快速测量氡析出率的方法,提出要准确测量积氡罩内的氡浓度的变化规律,现有的静电收集法测氡仪需要提高测量精度,减少统计涨落。

英文摘要：

The indoor radon concentration determined by three parameters：the average radon exhalation rate from indoor surface,the outdoor radon concentration and ventilation rate.In this paper,we proposed the model to describe the relationship between the indoor radon concentration and the average radon exhalation rate from indoor surface.We calculated the requirements of the average radon exhalation rate from indoor surface under different ventilation rates and outdoor radon concentrations for limiting the indoor radon concentrations not to exceed 100Bqm~（-3）.Analysis of the average outdoor radon concentrations and the annually average ventilation rates in southern and northern,the threshold value in is 31 Bq.m-2.h-1.This paper also analyzed the accumulation method for measuring radon exhalation rat.We proposed that the measurement accuracy of radon monitor based on electrostatic collection method need to improve,and the statistical fluctuation need to reduce for accurately measuring the radon concentration variation in the accumulation chamber.