期刊论文

中文

辐射防护

1000-8187

2017

37

4

280-286

11475082:国家自然科学基金 11275096:国家自然科学基金 2016HBB05-2:环保部核与辐射安全监督管理技术项目

本校为第一机构

在土壤中添加不同比例的膨润土或石灰粉,比较添加前后土壤覆盖层厚度相同时的降氡效果。本研究利用具有稳定氡析出率的标准模块(35 cm×35 cm×12 cm)作为源项,并自制截面为正方形(30 cm×30 cm)高度可调的实验箱,实验时尽量保持含水率和压实度一致。实验结果表明:随土壤中膨润土或石灰粉添加比例的增大降氡效果越好,且添加膨润土比石灰粉降氡效果更好;对结果进行曲线拟合分析,得出了添加不同比例膨润土或石灰粉的土壤覆盖厚度与降氡效果的对数关系式,并计算出了相应的氡扩散系数;推导出了在满足退役管理限值0.74 Bq·m~(-2)·s~(-1)时,覆盖前氡析出率与所需覆盖土壤厚度的关系式,可用于待治理氡...

To compare the effectiveness of radon suppression with the addition of different proportions of bentonite or lime powder in soil,a standard module（ 35 cm × 35 cm × 12 cm） with a stable radon exhalation rate as the source term and a height adjustable experiment box with cross section of 30 cm × 30 cm were used.The soil moisture content and degree of compaction were kept consistent during the experiment. The results showed the better suppression effect of radon with increasing proportions of bentonite or lime powder,while bentonite more effe...