| Including biological water and sediment,Marine medium c ontains a variety of natural radionuclides,notably the 210Pb 210Po is t he most active in the atmosphere in 210Po and 210Pb through settlin g into the Marine environment,through dissolved into water,atmosph eric radon decay constantly release its daughter 210Pb with 210Po,lan d,fresh water and sediments into ocean further acceleration in 210Po and 210Pb accumulation,soil from the the bottom of the ocean is flo wing property gives birth to 210Po and 210Pb analysis in the Marine environment in 210Po and 210Pb level,is the radiation environmental monitoring and the judgment to the Marine environment caused by human activities increased the natural radioactive substances?NORM?level of imPortant indicative of radionuclides.Marine environment is complex,the radionuclides from both natural formation,and the nucl ear Power plant emissions and nuclear accident under normal abnor mal discharge of artificial radionuclides,the Marine environment and atmospheric and environmental elements constantly changing land e xchange,prompting 210Po and 210Pb cycles,different from the atmosph ere and on land in the form of a series of changes in some sea cr eatures for enrichment of 210Po and 210Pb has a certain effect,can m ake the seafood certain parts of 210Pb or 210Po content greatly impr oved,these high levels of seafood,can lead to increased dose within the people to find out the Marine environment in 210Po and 210Pb l evel,establish a Marine medium 210Po and 210Pb analysis and measur ement method,is an imPortant part of Marine radioactivity level sur vey.In a large number of samples under the premise of experiment al analysis,combined with a large number of research literature at h ome and abroad,established a new Marine medium 210Pb analysis m ethod and the analysis of the new Marine medium 210Po measureme nt method,respectively,by ion exchange method for analyzing the me asuring method,separation means as a fluid separation plus alpha sp ectrometer from sedimentary 210Po two kinds of analysis method of measuring the parallel double blind sample testing after analyzing different laboratory comparison between strict quality control,after v erification,the two methods for Marine medium 210Po and 210Pb anal ysis and measurement,and reliable quality control results,and the nec essary technical conditions,accord with a standard analysis method c onform to the requirements of the monitoring technology of various aspects.With the analytical method,the project is to establish 210Po and210Pb in Zhejiang in the east China sea offshore Marine medium l evel has carried out the investigation and analysis results show that the offshore waters of the east China sea 210Po and 210Pb level in the following 10mBq/L,basic level to be higher than 210Pb.210Po in t he sea creatures,creatures of 210Po is more enrichment and mud on the seabed 210Po and 210Pb in balance,the basic content is consistent,in the normal level. |
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