Investigation On Hygienic Background Of Drinking Water In Residents Around Haiyang Nuclear Power Station And Hygienic Assessment

【Objective】Through investigate activity concentration of total-α、total-β、artificialradionuclide like90Sr、3H、134Cs、137Cs、58Co、60Co、54Mn、103Ru、110mAg, etc, and naturalradionuclide like40K、226Ra、232Th in the surrounding residents drinking water of Haiyangnuclear power plant and analyse radiation level in low water period and high water period tounderstand the regularity of radioactive level, to estimate the dose level of the residentsarround nuclear power plant and the influence of radioactive level assessment of drinkingwater on the residents’ health.【Methods】 In the30km evacuation zone of Haiyang nuclearpower station, samples were collected in the wet period and dry season respectively everyquarter of the year, and a total of50samples are collected in4times in two years;pretreatment and preparation according to the national standard (GB12375-90) recommendedmethod;measurement of the total alpha, beta level using BH1216low background alpha, betameasuring device, the gamma ray spectrum measurement with GMX40P4-76HPG gammaray spectrometer, tritium concentration measurement application of type A317001lowbackground liquid scintillation counting system, FJ2603G low background beta measuringinstrument for measuring the concentration of the90Sr level using.【Results】1.The activityconcentration level of total-α、total-β、40K and90Sr，compared with the measurements of theNational survey of natural radioactivity，are basically the same，226Ra、232Th、134Cs、137Cs、58Co、60Co、54Mn、103Ru、110mAg and other nuclei were not measured;2.No significantdifference between the radioactive indicators of drinking water around Haiyang nuclear powerplant in the dry season and the wet period;3.Residents of sampling points of exceed standardor close to radioactive indicators guidance value, have a Maximum annual effective doseattribute to tritium、40K and90Sr is3.910-3mSv/a6.510-3mSv/a【.Conclusion】1.The totalalpha, total beta and radionuclide activity concentrations were in the bottom level;2.Nosignificant difference of radioactive indicators around drinking water around Haiyang nuclearpower plant in the dry season and the wet period;3.The maximum annual effective doseattribute to tritium、40K and90Sr in the sampling points of exceed standard or close toradioactive indicators guidance value dose not cause burden of residents, the water isdrinkable.