辐射防护专业英语论文.docx

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