The Research Of Urban Environmental Natural Radioactivity In Panzhihua

This paper comprehensively researched now the world's knowledge, themeasuring method and the national standard of environmental radioactivity andcomplex geology in China. Sichuan. Panzhihua. In these foundations, by conductinggamma measurement in species of stratum and rock nuits in Panzhihua' maininhabited areas and again useing abundances of dates measured by ChengduUniversity of technology's experts and professors in 1:50000 regional geologicalinvestigation in China. Sichuan. Panzhihua and Jingjiang, we got sufficient dates ofradioactive measurement. Then,we reorganized, analyzed and processed these datesfrom different species of stratum and rock nuits, researched different stratum and rocknuits' natural radioactive nuclides and air-absorbed doses.The first timecomprehesivly and systemicly estimated Panzhihua's natural environmentalradioactivity, it would be beneficial to the inhabitant environmental plan and theconstruction, and be important to the inhabitant quality and the level of life. We got someconclusions as follow:(1)Panzhihua's majority of areas' air-absorbed doses is under nationallevel-86nGy/h, few areas' is slightly higher than national level, but effective dose isunder National standard-lmSv,, which is in normal level.(2)The content of natural radioactive nuclides in rocks and stratum in Panzhihuahas rule, so these areas of rocks and stratnm's air-absorbed doses has rule too, whichdecided by the age and formation of the rock/stratum unit, therefore may be according to them toplan the inhabited areas.(3)Relatively says, late Permian granite and simian system guanying crag group'scontent of radioactive nuclides is highest, so areas of these rock/stratum units has thehighest exposure dose and we should avoid planning as far as possible to construct theinhabitant plots in among.This paper utilized and conversed dates of 1:50000 regional geologyinvestigation in China. Sichuan. Panzhihua and Jingjiang, expanded the radioactivegamma survey service domain. The research results could be used by Panzhihua's urbanplanning construction and the method also can be used for reference.