辐射防护专业英语论文.docx

1、辐射防护专业英语论文Analysis of the emanometerYuan zicheng (Chengdu University of Technology, Chengdu Erxianqiao 610059)Abstract The article Analysis the emanometer in studying field. Used in underground engineering, mining, tourism cave, nuclear facilities, the associated uranium and radon measurement of ind

2、oor environment, health supervision and evaluation of radioactive detection, is a search for radon, radon source (th) device management, radiation safety evaluation and other necessary.Keywords emanometer ;Radon ;decay ;admeasuring apparatus1.IntroductionRadon overviewRadon is a natural radioactive

3、decay of radium isotopes in sub uranium and thorium decay series in the body, itself also has the radiation, emits an alpha particle decay, become the radon progeny, the half-life of 3.825 days.Radon measurement can be used to explore the uranium deposit in recent years has developed to can be used

4、for oil exploration, is of great significance in the search for clean energy. Our use of water radon variation of earthquake prediction has been 40 years of history, the recent international and soil atmosphere to predict earthquakes have new breakthrough. In recent years, the World Health Organizat

5、ion announced the natural radiation people by 50% is caused by radon and radon in the environment of inhaled too much can cause lung cancer and other diseases, therefore the radon measurement has gradually become a topic of public concern. A comprehensive understanding of instrument types, principle

6、 and application for people to pay more attention to. Classification of the radon measurement instrumentMeasuring method and instrument of radon and radon many, there are about 30 more.The physicochemical properties of radonRadon is a colorless odorless transparent unit of inert gas in the standard

7、state, density is 9.73kg/m3. When the temperature dropped to -65 into a liquid, its density is 5.7 103kg/mol. The temperature dropped further to -71 become shiny orange solid.Radon is an inert gas, is not easy to produce chemical reaction. Radon decay half-life of 3.825d, when the energy of alpha pa

8、rticles emitted by 5.49MeV. Radon can be dissolved in water and other liquids, it is easy to dissolve in the blood and fat, can be dissolved in the rubber, the lytic factor (the ratio concentration in the air of the liquid sample and) has close relation with temperature, pressure. At the same time r

9、adon + adsorption easily activated carbon, clay and other porous materials. Activated carbon adsorption coefficient is a function of temperature, the typical values listed in table -1.Activated carbon adsorption coefficientTemperature-12016405075100200adsorption coefficient15050631022358406302701430

10、Note: the adsorption coefficient is urticant per gram of activated carbon (Bq/m3) ratio.2.Basic knowledge of radon detector1) according to the different situation to classification determinationDivided into the soil radon measurement method of radon in the air, a method for the determination of rado

11、n in water, the determination method of three categories, each category also includes a number ofMethods.2) according to the different purposes of measuring radon, took different approachesUse of radon to search for uranium and thorium deposits for earthquake prediction, oil, etc., determination and

12、 the environment or the indoor radon, the method will be different.3) according to the determination of isotopic species of different classificationDirect measurement of radon itself, or indirectly measuring radon first generation progeny of radium (RaA A; its Po) of radioactive, this also is a kind

13、 of classification method.4) according to the different sampling methods to classifyCan pump portion of the atmosphere (air, water or soil gas) to determine the grab, or may be passive type (passive) wait for radon spread itself to detector and accumulated for a period of time after the probe to ana

14、lysis. The former is called warm method (differential) measurement, and the latter is called the cumulative sum method (integral) measurement.3.List of radon detectorContinuous measuring radon and its progenyIntroductionRadon and its progeny continuous measuring instrument for portable real-time con

15、tinuous measurement of radon concentration and radon concentration and total potential multifunctional instrument, as the active sampling structure, has the advantages of typical, can be used in underground engineering, mining, tourism cave, nuclear facilities, places associated uranium series and i

16、ndoor environmental radon measurement, health supervision and evaluation of radioactive detection, is a search for radon, radon source (th) device management, radiation safety evaluation and other necessary, with the radiation effect on Application Study on estimation of radon and radon dose monitor

17、ing requirements. Available for immediate results, simple operation, easy to carry, suitable for large-scale survey radon level.Conditions of useA) environment temperature: -10 45 Relative humidity: 95% b)C) power supply: 6V battery, equipped with charger, battery charging time can work for 6 hours;

18、 can also be used AC220/50Hz.The main technical performanceA): a semiconductor detector, the detector has the advantages of small size, fast response, insensitive to gamma.B) instrument background: 2cpm. Sensitivity: 1.2 10cps/Bq/m (RN).C) detection efficiency of Pu- non-point source: 40% (2 D) coun

19、ting capacity of 99999999; measuring range: radon / radon concentration of 2-1 10Bq/m, potential concentration: 1 x 10-10J/m.E) to measure the time interval: 1 (measurement of radon concentration), 3 (sub body and potential measurement) are 26min, namely 26 gives results; 2 for 1 100 minutes accordi

20、ng to the radon level set the timing measurement of radon concentration; the inside of the instrument has been set to 26min, can meet the needs of the general measurement of configurable micro printer output data.F) the instrument of high degree of automation, which can change the parameter settings

21、, automatic display, instant results, set up the output function key, it can store 100 historical measurements.G) micro sampling pump: 2L/min (built-in); 30 ordinary filter paper.H) the size and weight: 245*245*255, 3Kg.RLM-I radon detectorIntroductionRadon detector of type RLM-I is radon monitoring

22、 method and technology in the most advanced, Germany based on, and American radon detector is comparable, with high price performance ratio, meet the radon measurement standard measurement requirements for GB14582-1993 and GB30325 and the International Electrotechnical Commission, which can meet the

23、 environmental monitoring and scientific test uranium radium mine, coal mine, indoor environment, metal mines, health and environmental protection departments RLM-I radon measuring instrument. With soil sampling rod soil radon measurement, matching water gas bubbling device to realize the measuremen

24、t of radon in water, supporting the exhalation rate cover and the detection device can realize the measuring radon exhalation rate.Technical parameters:Power source: 220VAC/5VDC, 1A power adapterBattery: 6V/7A batteries battery (when the full power available for instrument work continuously for abou

25、t 10 hours)Detector: 30 mm semiconductor detectoDisplay: 160*160 dot matrix LCD, a white backlightMeasuring range: 0 999999Bq M-3Uncertainty: 200Bq M-3)Sensitivity: 70cpm Bq-1Working mode: continuous sampling period measurement mode: 26 points, the precise mode: 5-99 minutes of optional, fast mode f

26、or 15 minutes.Data interface: RS-232 interface (9 pin), can be connected with a micro printer and providing the data interface protocolMemory: EEPROM storageWorking environment: -20 -40 , 0 90%RHSize: 385mm x 370mm x 235mmWeight: 5.5kg1RECM-III radon measuring instrumentIntroductionRECM-III radon ra

27、don detector is a portable surface radon exhalation rate of radon concentration measurement and the two functions of radon measuring instrument, instrument measuring radon measurement method based on design requirements of its typical structure, can real-time fast measure medium surface radon and ra

28、don concentration in air, can be used to measure precipitation rate and concentration of radon in underground engineering, mining, tourism cave, nuclear facilities, tailings and building materials, soil, ground surface radon radon exhalation of radon measurement instrument of type RECM-III, is a nec

29、essary device for looking for the source of radon and radon control. Suitable for GB50325 civil engineering indoor pollution control norms (2006 version) determination and measurement of radon concentration in air requirements of soil radon exhalation rate from the surface, but also in the construct

30、ion or renovation before the stone, cement, paint and other building materials for radiation detection and identification, guide the quality of materials and environmental radon control.Detection efficiency of 239Pu non-point source: 35% (2Counting capacity of 99999999Measuring range: radon emanatio

31、n of 5 10-5 102Bq/ (M2 s), radon concentration of 3 106Bq/m3Measurement of time: 2 ways to measure radon exhalation rate, measuring the time interval between 1 120 minutes according to the radon exhalation rate set, 1 for continuous measurement of radon concentration, can save 100 historical measure

32、mentsCan change the parameter settings, automatic display, real-time measurement results are given etc.Dont use an external printer, measuring the history value according to the output keys and keys can be found on theEnvironment temperature: -5 40 ; relative humidity: 90%Power supply: built-in 6V battery charger, equipped with specializedSize and weight: 300*290*290, 5.5KgRTM-I ra