四川省某电厂为我省唯一修建在洞内的中型燃煤发电厂。洞内装有两台五万瓩高温高压双水冷内汽轮发电机组,总装机容量十万瓩。目前,地下建筑物内放射性对人体所产生的影响越来越引起人们的重视。为了解该电厂洞内作业环境中的天然放射性水平,我们开展了这一次调查。 1.调查概况 1.1 调查点的分布该电厂主厂房位于完整的花岗石体内,由三条南北走向近200米的导洞和东西走向横贯三条导洞的四个洞室组成,洞内总面积 A power plant in Sichuan Province is the only medium-sized coal-fired power plant built in the cave. Two 50000 high temperature and pressure double water-cooled turbine generators are installed in the cave, with a total installed capacity of 100,000 瓩. At present, the impact of radioactivity in underground buildings on the human body is drawing more and more attention. We conducted this survey to understand the natural level of radioactivity in the working environment inside the power plant. 1. Survey Survey 1.1 Distribution of survey sites The main plant of the power plant is located in a complete granite body and is composed of three pilot tunnels approaching 200 meters from north to south and four tunnels traversing three pilot tunnels from east to west. The total area of ​​the tunnel