期刊论文

Shan, J.

中文

核技术

0253-3219

2016

39

1

010401-1-010401-5

10.11889/j.0253-3219.2016.hjs.39.010401

国家自然科学基金

本校为第一且通讯机构

应用MATLAB对开环式氡析出率测量过程中不同抽气流率下集氡罩内氡浓度随时间的变化规律进行模拟计算,并用实验对计算结果进行了验证。结果表明,在氡析出率测量时保持集氡罩参数不变的情况下,随着抽气流率的增大,集氡罩内平衡氡浓度值减小,达到平衡氡浓度的时间也缩短。实验表明,集氡罩内的平衡氡浓度的减小可最大限度地减小泄露与反扩散的影响;抽气流率的变大使集氡罩内达到平衡氡浓度时间缩短以及集氡罩内的充气均匀性愈好。通过本次实验,获得的抽气流率为1.94-3.0 L·min~(-1),集氡罩底面积为299 cm~2,体积为1.79×10~(-3)m~3。

Background: The research on radon exhalation rate mainly focuses on the influence factors of radon exhalation rate on the media surface, while research is still lacking with respect to equilibrium radon concentrations in radon cover sets, gas flow rate and other factors affecting the measurement accuracy of radon exhalation rate. Purpose: This study aimed to explore the relationship of the open-loop air-bleed rate, equilibrium radon concentrations and radon exhalation rate through theoretical calculations and actual measurements. Methods: MATLA...