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1SourceProcess4567891011121314Findingthesource Theapproximatepositionofthesourcewasfoundthroughgamma-raydetectioninstrumentsatmorning9:00a.m.on10thMay,afterWanghadthrownit3hourslate.Butthepreciseposition’sdeterminationwasdifficult,becausethesourcewastoosmallandtheradiationwastoostrongnearthesource.Finally,ametal-detectorwasusedtofindtheprecisepositionofthesource.1718CalculationMr.Wang’sDoseCalculationOtherPeople’sDoseOtherpeopleworkinginworkshop: 9person(3-5mfromsource),Dose:2.5-6.25mSv 4person(6mfromsource),Dose:1.74mSv 7person(15mfromsource),Dose:0.28mSv 20person(20-40mfromsource),AverageDose:0.07mSv Theroadconstructionworkersnearthewarehouse: 20person(10-20mfromsource)Dose:0.78~3.125mSvTheworkmaterestedalongwithWanginrestroom Averagerangefromsource:3meters,Dose:13mSv Wang’sfamilyandtenant: Dose:25~37.5mSv Wang’sparentsandsister: Wang’sFather:0.09mSv; Wang’sMother:1.22mSv Wang’sSister:0.22mSv Twotenantslivedinsecondfloorupthesource’sroom Dose:5.12-6.4mSv; Theconstructorsneartheplacewherethesourcewasfound 11constructors(30-80mfromthesource), MaximumDose:0.42mSvConcludeofthecalculationClinicalManifestation26