四川燃煤电厂对周围土壤的辐射影响

燃煤电厂对环境与人群所产生的辐射影响早已引起了国内外学者的关注。本文通过对四川省境内重庆、河门口、江油等燃煤电厂烟尘中天然放射性水平的分析，估算出由烟尘沉降所造成周围土壤中天然放射性本底的年增加量不到０．１％，这说明由烟尘沉降每年对土壤所产生的辐射影响是较小的；然而由于沉降的放射性在相当长的时期内存在于土壤的表层，因此随电厂运转时间的增加，其所产生的辐射影响就必须引起重视了；本文通过对电厂周围表层与深层土中天然放射性水平的比较与分析说明，燃煤电厂的长期运转有可能使周围表层土壤中天然放射性本底增加。

Radiation Effect of Coal -fired Power Plants on Soil in Sichuan

Radiation effects of coal-fired power plants on people and environment have long been concerned by scientists all over the world.By analysing natural radioactive levels of smoke dust of coal-fired plants in Chongqing,Hemenkou and Jiangyou,etc. in Sichuan Province,This paper estimated the annual increment of radioactive background level .caused by smoke dust deposition,was less than 0.1%,which showed the radiation effect on soil caused by smoke dust eposition was lower.On the other hand,the deposited radi- ation existed rather long period in surface stratum of soil ,therefore ,as the operating time of coal -fired plants increased,the radiation ef- fect caused by it must be taken seriously.By comparing and analysing the natural radioactive level in surface statum soil and that of in deep stratum soil around plants,the paper disclosed that long -time-operating of coal-fired plant may possiblely increase the natural radioactive background level in surface soil around the plant.