辐射防护专业英语论文.docx
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辐射防护专业英语论文.docx
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辐射防护专业英语论文
Analysisoftheemanometer
Yuanzicheng
(ChengduUniversityofTechnology,ChengduErxianqiao610059)
AbstractThearticleAnalysistheemanometerinstudyingfield.Usedinundergroundengineering,mining,tourismcave,nuclearfacilities,theassociateduraniumandradonmeasurementofindoorenvironment,healthsupervisionandevaluationofradioactivedetection,isasearchforradon,radonsource(th)devicemanagement,radiationsafetyevaluationandothernecessary.
Keywordsemanometer;Radon;decay;admeasuringapparatus
1.Introduction
Radonoverview
Radonisanaturalradioactivedecayofradiumisotopesinsuburaniumandthoriumdecayseriesinthebody,itselfalsohastheradiation,emitsanalphaparticledecay,becometheradonprogeny,thehalf-lifeof3.825days.
Radonmeasurementcanbeusedtoexploretheuraniumdepositinrecentyearshasdevelopedtocanbeusedforoilexploration,isofgreatsignificanceinthesearchforcleanenergy.Ouruseofwaterradonvariationofearthquakepredictionhasbeen40yearsofhistory,therecentinternationalandsoilatmospheretopredictearthquakeshavenewbreakthrough.Inrecentyears,theWorldHealthOrganizationannouncedthenaturalradiationpeopleby50%iscausedbyradonandradonintheenvironmentofinhaledtoomuchcancauselungcancerandotherdiseases,thereforetheradonmeasurementhasgraduallybecomeatopicofpublicconcern.Acomprehensiveunderstandingofinstrumenttypes,principleandapplicationforpeopletopaymoreattentionto.Classificationoftheradonmeasurementinstrument
Measuringmethodandinstrumentofradonandradonmany,thereareabout30more.
Thephysicochemicalpropertiesofradon
Radonisacolorlessodorlesstransparentunitofinertgasinthestandardstate,densityis9.73kg/m3.Whenthetemperaturedroppedto-65℃intoaliquid,itsdensityis5.7×103kg/mol.Thetemperaturedroppedfurtherto-71℃becomeshinyorangesolid.
Radonisaninertgas,isnoteasytoproducechemicalreaction.Radondecayhalf-lifeof3.825d,whentheenergyofalphaparticlesemittedby5.49MeV.Radoncanbedissolvedinwaterandotherliquids,itiseasytodissolveinthebloodandfat,canbedissolvedintherubber,thelyticfactor(theratioconcentrationintheairoftheliquidsampleand)hascloserelationwithtemperature,pressure.Atthesametimeradon+adsorptioneasilyactivatedcarbon,clayandotherporousmaterials.Activatedcarbonadsorptioncoefficientisafunctionoftemperature,thetypicalvalueslistedintable-1.
Activatedcarbonadsorptioncoefficient
Temperature℃
-12
0
16
40
50
75
100
200
adsorptioncoefficientγ
15050
6310
2235
840
630
270
143
0
Note:
theadsorptioncoefficientisurticantpergramofactivatedcarbon(Bq/m3)ratio.
2.Basicknowledgeofradondetector
1)accordingtothedifferentsituationtoclassificationdetermination
Dividedintothesoilradonmeasurementmethodofradonintheair,amethodforthedeterminationofradoninwater,thedeterminationmethodofthreecategories,eachcategoryalsoincludesanumberof
Methods.
2)accordingtothedifferentpurposesofmeasuringradon,tookdifferentapproaches
Useofradontosearchforuraniumandthoriumdepositsforearthquakeprediction,oil,etc.,determinationandtheenvironmentortheindoorradon,themethodwillbedifferent.
3)accordingtothedeterminationofisotopicspeciesofdifferentclassification
Directmeasurementofradonitself,orindirectlymeasuringradonfirstgenerationprogenyofradium(RaAA;it'sPo)ofradioactive,thisalsoisakindofclassificationmethod.
4)accordingtothedifferentsamplingmethodstoclassify
Canpumpportionoftheatmosphere(air,waterorsoilgas)"todeterminethegrab",ormaybepassivetype(passive)waitforradonspreaditselftodetectorandaccumulatedforaperiodoftimeaftertheprobetoanalysis.Theformeriscalledwarmmethod(differential)measurement,andthelatteriscalledthecumulativesummethod(integral)measurement.
3.Listofradondetector
Continuousmeasuringradonanditsprogeny
Introduction
Radonanditsprogenycontinuousmeasuringinstrumentforportable"real-time""continuous"measurementofradonconcentrationandradonconcentrationandtotalpotentialmultifunctionalinstrument,asthe"active"samplingstructure,hastheadvantagesoftypical,canbeusedinundergroundengineering,mining,tourismcave,nuclearfacilities,placesassociateduraniumseriesandindoorenvironmentalradonmeasurement,healthsupervisionandevaluationofradioactivedetection,isasearchforradon,radonsource(th)devicemanagement,radiationsafetyevaluationandothernecessary,withtheradiationeffectonApplicationStudyonestimationofradonandradondosemonitoringrequirements.Availableforimmediateresults,simpleoperation,easytocarry,suitableforlarge-scalesurveyradonlevel.
Conditionsofuse
A)environmenttemperature:
-10℃~45℃
Relativehumidity:
≤95%b)
C)powersupply:
6Vbattery,equippedwithcharger,batterychargingtimecanworkfor6hours;canalsobeusedAC220/50Hz.
Themaintechnicalperformance
A):
asemiconductordetector,thedetectorhastheadvantagesofsmallsize,fastresponse,insensitivetogamma.
B)instrumentbackground:
≤2cpm.Sensitivity:
1.2×10cps/Bq/m(RN).
C)detectionefficiencyofPu-αnon-pointsource:
40%(2π
D)countingcapacityof99999999;measuringrange:
radon/radonconcentrationof2-1×10Bq/m,potentialconcentration:
1x10-10J/m.
E)tomeasurethetimeinterval:
1(measurementofradonconcentration),3(subbodyandpotentialmeasurement)are26min,namely26givesresults;2for1~100minutesaccordingtotheradonlevelsetthetimingmeasurementofradonconcentration;theinsideoftheinstrumenthasbeensetto26min,canmeettheneedsofthegeneralmeasurementofconfigurablemicroprinteroutputdata.
F)theinstrumentofhighdegreeofautomation,whichcanchangetheparametersettings,automaticdisplay,instantresults,setupthe"output"functionkey,itcanstore100historicalmeasurements.
G)microsamplingpump:
2L/min(built-in);30ordinaryfilterpaper.
H)thesizeandweight:
245*245*255,3Kg.
RLM-Iradondetector
Introduction
RadondetectoroftypeRLM-Iisradonmonitoringmethodandtechnologyinthemostadvanced,Germanybasedon,andAmericanradondetectoriscomparable,withhighpriceperformanceratio,meettheradonmeasurementstandardmeasurementrequirementsforGB14582-1993andGB30325andtheInternationalElectrotechnicalCommission,whichcanmeettheenvironmentalmonitoringandscientifictesturaniumradiummine,coalmine,indoorenvironment,metalmines,healthandenvironmentalprotectiondepartmentsRLM-Iradonmeasuringinstrument.Withsoilsamplingrodsoilradonmeasurement,matchingwatergasbubblingdevicetorealizethemeasurementofradoninwater,supportingtheexhalationratecoverandthedetectiondevicecanrealizethemeasuringradonexhalationrate.
Technicalparameters:
Powersource:
220VAC/5VDC,1Apoweradapter
Battery:
6V/7Abatteriesbattery(whenthefullpoweravailableforinstrumentworkcontinuouslyforabout10hours)
Detector:
Φ30mmsemiconductordetecto
Display:
160*160dotmatrixLCD,awhitebacklight
Measuringrange:
0~999999Bq·M-3
Uncertainty:
<15%(whentheradonconcentration>200Bq·M-3)
Sensitivity:
70cpm·Bq-1
Workingmode:
continuoussamplingperiodmeasurementmode:
26points,theprecisemode:
5-99minutesofoptional,fastmodefor15minutes.
Datainterface:
RS-232interface(9pin),canbeconnectedwithamicroprinterandprovidingthedatainterfaceprotocol
Memory:
EEPROMstorage
Workingenvironment:
-20~-40℃,0~90%RH
Size:
385mmx370mmx235mm
Weight:
5.5kg[1]
RECM-IIIradonmeasuringinstrument
Introduction
RECM-IIIradonradondetectorisaportablesurfaceradonexhalationrateofradonconcentrationmeasurementandthetwofunctionsofradonmeasuringinstrument,instrumentmeasuringradonmeasurementmethodbasedondesignrequirementsofitstypicalstructure,can"real-time""fast"measuremediumsurfaceradonandradonconcentrationinair,canbeusedtomeasureprecipitationrateandconcentrationofradoninundergroundengineering,mining,tourismcave,nuclearfacilities,tailingsandbuildingmaterials,soil,groundsurfaceradonradonexhalationofradonmeasurementinstrumentoftypeRECM-III,isanecessarydeviceforlookingforthesourceofradonandradoncontrol.SuitableforGB50325"civilengineeringindoorpollutioncontrolnorms"(2006version)determinationandmeasurementofradonconcentrationinairrequirementsofsoilradonexhalationratefromthesurface,butalsointheconstructionorrenovationbeforethestone,cement,paintandotherbuildingmaterialsforradiationdetectionandidentification,guidethequalityofmaterialsandenvironmentalradoncontrol.
Detectionefficiencyof239Puαnon-pointsource:
35%(2
Countingcapacityof99999999
Measuringrange:
radonemanationof5×10-5~102Bq/(M2·s),radonconcentrationof3~106Bq/m3
Measurementoftime:
2waystomeasureradonexhalationrate,measuringthetimeintervalbetween1~120minutesaccordingtotheradonexhalationrateset,1forcontinuousmeasurementofradonconcentration,cansave100historicalmeasurements
Canchangetheparametersettings,automaticdisplay,real-timemeasurementresultsaregivenetc.
Don'tuseanexternalprinter,measuringthehistoryvalueaccordingtotheoutputkeysandkeyscanbefoundonthe
Environmenttemperature:
-5℃~40℃;relativehumidity:
≤90%
Powersupply:
built-in6Vbatterycharger,equippedwithspecialized
Sizeandweight:
300*290*290,5.5Kg
RTM-Ira
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