湖南省部分地区非铀矿山及地洞内氡子体α潜能浓度的调查

A SURVEY OF RADON AND ITS DAUGHTER ALPHA POTENTIAL ENERGY CONCENTRATIONS IN SOME NONURANIUM MINES AND CAVES IN HUNAN PROVINCE

本文介绍了湖南省东南部可能有较高氡浓度的部分非铀矿山井下氡子体α潜能浓度以及地洞内^(222)Rn 及其子体α潜能浓度的调查结果。调查了有人为活动的78个地洞。其内289个测点的^(222)Rn浓度和^(222)Rn 子体α潜能浓度的范围分别为0.032—2.57kBq/m^3和0.042—9.63μJ/m^3,所调查的16个非铀矿山的^(222)Rn 子体α潜能浓度平均值的范围为1.3—1.1×10~3μJ/m^3,其中63%的矿山的^(222)Rn 子体浓度超过了 ICRP 关于工作人员吸入氡子体的限值8.3μJ/m^3(0.40WL)。

This paper presents the results of survey of concentrationsof ^(222)Rn and its daughter alpha potential energy in some non-uranium minesand caves in Hunan Province.The measuring values in 78 caves,rangedfrom 0.032—2.57kBq/m^3 and 0.042—9.63 μJ/m^3 respectively.The mean ofconcentration of ^(222)Rn daughters alpha potential energy in 16 minesinvestigated ranged from 1.3—1.1×10μJ/m^3 in which 63% of the meanconcentrations of ^(222)Rn daughters alpha potential energy exceeded theoccupational limits(8.3μJ/m^3).