Thinová L, Froňka A, Rovenská K
Czech Technical University in Prague, Department of Dosimetry, Břehová 7, 115 19 Praha 1, Czech Republic
National Radiation Protection Institute, Bartoškova 28, Praha 4 140 00, Czech Republic.
Radiat Prot Dosimetry. 2015 Jun;164(4):502-9. doi: 10.1093/rpd/ncv337. Epub 2015 May 21.
This paper focuses on the measurement and assessment of absorbed doses of radiation in caves of the Czech Republic, some of which exhibit high activity concentration of radon in air. Presented is an analysis and recommendations based on measurement results obtained in the underground caves over the past 12 y. The most important results for cave environments were as follows: integral radon monitoring using RAMARN detectors can provide more consistent results for calculating the effective dose; no major differences were shown in the average radon activity concentration during working time as opposed to non-working time; the unattached fraction of radioactive particles in air ranged from 0.03 to 0.6, with arithmetical average fp = 0.13; the direct dependence between equilibrium factor F and the size of the unattached fraction fp was described using the Log-Power expression ln(1/fp) = a*ln(1/F)(b); the calculated values for coefficients a and b were 1.85 and -1.096, respectively. The individual cave factor for each investigated underground area was calculated.
本文重点关注捷克共和国洞穴中辐射吸收剂量的测量与评估，其中一些洞穴空气中氡的活度浓度较高。文中给出了基于过去12年在地下洞穴获得的测量结果的分析与建议。洞穴环境的最重要结果如下：使用RAMARN探测器进行的累积氡监测可为有效剂量计算提供更一致的结果；工作时间与非工作时间的平均氡活度浓度无显著差异；空气中放射性粒子的未附着部分占比为0.03至0.6，算术平均值fp = 0.13；使用对数-幂表达式ln(1/fp) = a*ln(1/F)(b)描述了平衡因子F与未附着部分占比fp大小之间的直接关系；系数a和b的计算值分别为1.85和 -1.096。计算了每个调查地下区域的单个洞穴因子。
