Lu Xinwei, Zhang Xiaolan
College of Tourism and Environment, Shaanxi Normal University, Xi'an 710062, P. R. China.
Health Phys. 2006 Dec;91(6):619-23. doi: 10.1097/01.HP.0000225447.17345.d0.
22Rn air concentrations in the Lantian Xishui karst cave of Shaanxi, China, were measured by continuous monitoring during a complete annual cycle (March 2004-February 2005) and annual doses for tour guides and visitors were estimated. The 22Rn air concentrations in the cave vary between a minimum of 383.6 Bq m(-3) and a maximum of 2,015.7 Bq m(-3), with an annual average of 1,100.4 Bq m(-3). Distinct seasonal variation of radon air concentrations inside the cave was observed. The maximum average radon concentration occurred in summer and the minimum average radon concentration occurred in winter. The annual effective dose to tour guides varies between an average of 1.2 mSv and 4.9 mSv depending on different equilibrium factors together with different dose conversion factors proposed in the literature, which is lower than the international recommendations. In all cases, the annual effective doses to visitors are well under the 1 mSv maximum suggested dose for a member of the public for one year.
在中国陕西蓝田西水岩溶洞穴中，通过连续监测一个完整年度周期（2004年3月 - 2005年2月）测量了空气中的²²Rn浓度，并估算了导游和游客的年剂量。洞穴内空气中的²²Rn浓度在最小值383.6 Bq m⁻³和最大值2015.7 Bq m⁻³之间变化，年平均值为1100.4 Bq m⁻³。观察到洞穴内氡气浓度有明显的季节变化。夏季平均氡浓度最高，冬季平均氡浓度最低。根据文献中提出的不同平衡因子和不同剂量转换因子，导游的年有效剂量在平均1.2 mSv至4.9 mSv之间变化，低于国际建议值。在所有情况下，游客的年有效剂量远低于公众一年建议的最大剂量1 mSv。
