Investigation Of Natural Ionizing Radiation Environment In Yueyang City

With the continuous development of nuclear energy and nuclear technology,the application of ionizing radiation has spread to many fields of human production and life and become the key content of environmental supervision and monitoring.In order to timely find the radiation environmental pollution caused by human activities,in order to scientifically evaluate technology and resource development may cause the effects on the environment,to ensure the safety of the public health and radiation environment timely grasp the ionizing natural radiation environmental status quo level and its changes,and for guiding the nuclear and radiation safety supervision and radiation environmental protection is of great significance.In the view of the change of natural radiation environmental in Yueyang,this essay sorted out within seven years from 2011 to 2017,air absorbed dose rate,water,soil,and the cosmic rays radiation environmental monitoring data in Yueyang,as well as the supervision and administration of Yueyang city natural ionizing radiation,by collating and contrast,analyzes the Yueyang city radiation environmental quality changes of 7years,get the following conclusion:(1)From 2011 to 2017,the radiation air absorbed dose rate of public air in yueyang city did not change much in the time series,and was within the local natural background fluctuation range,indicating that the atmospheric radiation environment quality in Yueyang city was stable from 2011 to 2017.(2)From 2011 to 2017,the activity concentrations of uranium,radium-226,potassium-40 in the water sample at the point in Dongting Lake were monitored.Thorium concentration is mostly at the local level,which exceeded the natural local level for three consecutive years from2012 to 2014,but did not exceed the background level by three times,which is acceptable and is not considered to cause pollution.From 2015 to 2017,the total fresh and underground radiations of the water samples at monitoring points in Jinfeng reservoir met the recommended values of radioactive indicators specified in the sanitary standard for living drinking water(gb5749-2006).In terms of spatial sequence,there was no significant difference in total number of radii and total depth activity concentration of water samples at two surface water monitoring points in Yueyang city,which was basically at the same level.On average,the total radioactivity in lake water is slightly lower than that in drinking water.(3)From 2015 to 2017,the activity concentrations of uranium-238,thorium-232,radium-226,potassium-40 in soil samples at the site monitored in the park were all at the background level.(4)From 2012 to 2017,the response value of cosmic ray of the monitoring point instrument on Junshan island was stable,with little change across the year.(5)The industrial development and resource development of yueyang city did not produce adverse effects on the regional radiation environment,and the supervision and management of ionizing radiation were in place.