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Tritium concentrations in precipitation in Shanghai

【摘要】Tritiumconcentrationsinprecipitationcanbeusedasacriteriontoevaluatethetritiumbaselineoftheenvironment.ThetritiumconcentrationinprecipitationinShanghaiduring2014–2015wasdetermined.Valuesrangedfrom0.68±0.04to4.11±0.39Bq/L,anditshowedadecreasingtrendcomparedwithhistoricaldata;however,thevalueswereslightlyhigherthanthenaturalbackgroundtritiumlevel.Additionally,thetritiumconcentrationshowsaseasonalvariation:Itwashigherinautumnandwinterandlowerinsummerandspring.AcomparisonofconcentrationsinprecipitationinShanghaiandaroundtheQinshanNuclearPowerPlantrevealsnocorrelation,implyingthatthenuclearpowerplantoperationsmaynotaffecttheenvironmentofShanghai.Thus,theraisedtritiumconcentrationsinShanghaimightbeduetotheeffectsofmonsoons,springleak,raindrop,orotheractivitiesthatgeneratetritiumthere.Thoseactivitiesmayincludechemistryresearchthatusestritiumasatracer.

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73 共6页 核技术:英文版 2018年5期 免费 中文科技期刊数据库

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