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Design And Development Of A Detector To Measure Integrated Radon Concentrations
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Book Synopsis Design and Development of a Detector to Measure Integrated Radon Concentrations by : Carlos Antonio De Leers Costa-Ribeiro
Download or read book Design and Development of a Detector to Measure Integrated Radon Concentrations written by Carlos Antonio De Leers Costa-Ribeiro and published by . This book was released on 1973 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1975 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Radon Measurements By Etched Track Detectors - Applications In Radiation Protection, Earth Sciences by : Saeed A Durrani
Download or read book Radon Measurements By Etched Track Detectors - Applications In Radiation Protection, Earth Sciences written by Saeed A Durrani and published by World Scientific. This book was released on 1997-06-09 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt: Exposure to radon gas, which is present in the environment naturally, constitutes over half the radiation dose received by the general public annually. At present, the most widely used method of measuring radon concentration levels throughout the world, both in dwellings and in the field, is by etched track detectors — also known as Solid State Nuclear Detectors (SSNTDs). Although this is not only the most widely used method but is also the simplest and the cheapest, yet there is at present no book available on the market globally, devoted exclusively or largely to the methodology of, and dealing with the results obtained by, the SSNTD technique. The present book fills this important gap in the coverage of radon measurements. Individual chapters of the book are contributed by some of the most prominent and active research workers in the world in the SSNTD discipline as well as in the field of radon measurements. A detailed breakdown of the contents of the book is shown below together with the name(s) of the author(s) of each chapter.
Book Synopsis Evaluation of Three Passive-Integrating Charcoal Detectors for Measuring Radon Concentrations by : David L. Sharp
Download or read book Evaluation of Three Passive-Integrating Charcoal Detectors for Measuring Radon Concentrations written by David L. Sharp and published by . This book was released on 1990 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: Three types of passive-integrating detectors that determine Radon-222 (Radon) concentrations in air samples were studied. Each detector type examined uses activated charcoal to adsorb radon from air samples that enter through a diffusion barrier. This results in a time-integrated sample. The three detector types analyzed were liquid-scintillation vials and canisters with and without moisture-absorbing desiccant. The LS vials contain a mixture of charcoal and desiccant. All three types of detectors were calibrated in a chamber of known radon concentration. Since the LS vials had not previously been studied at AFIT, the optimum procedure for exposing, processing, and counting the vials was established. An automated liquid-scintillation counter (LSC) was used for determining the radon levels of the LS vials. The variability in the radon concentrations computed by the LSC for repeated counting of a single vial was examined and was found to be between 1 and 4%. Reproducibility of radon adsorption by a group of vials exposed simultaneously was examined. Reproducibility values for a group of ten vials counted for 4 cycles had a standard error of 1.4%. A blind test was performed where the detectors were exposed to a known concentration, prepared, counted, and then the concentrations measured were compared to actual values. The measured values were within 0.2% to about 8% of the actual concentrations. Exposure times of 24 to 48 hours were recommended for the vials and 3 to 7 days for the canisters. Gas detectors; Radiation measuring instruments; Rare gases; Radon; Radium radioactivity; Natural radiation; Ionizing radiation; Alpha particles. Theses. (edc).
Book Synopsis Development of the Customized Radon Detector and Studies of the Radon Background Onsite for the Daya Bay Reactor Neutrino Experiment by : Kar-Yee Leung
Download or read book Development of the Customized Radon Detector and Studies of the Radon Background Onsite for the Daya Bay Reactor Neutrino Experiment written by Kar-Yee Leung and published by Open Dissertation Press. This book was released on 2017-01-26 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Development of the Customized Radon Detector and Studies of the Radon Background Onsite for the Daya Bay Reactor Neutrino Experiment" by Kar-yee, Leung, 梁嘉怡, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: The goal of the Daya Bay Reactor Neutrino Experiment is to determine the last unknown neutrino mixing angle θ13, in sin22θ13 to sensitivity better than 0.01 at 90% confidential level in three years of running. In order to reach the goal, background from natural radiation should be controlled less than 50 Hz, accordingly radon, which is a naturally-occurring radioactive gas, is one of the factors need to be monitored. A High-sensitivity and High-reliability Hong Kong (H3) radon monitoring system is developed to support the slow control system of the experiment. It achieves the sensitivity requirement and fulfills the data acquisition specification by using an enlarged sample chamber, an improved electronic and a designed software, in addition to the dehumidifier system for long term use. Four final products of the radon detector were well calibrated and tested before application; the sensitivities of counted progenies Po-218 and Po-214 are 3.65 0.37 x10-2 cpm/Bq-m3 (C.F.is 27.42.7 Bq/m3/cpm) and 3.94 0.40 x10-2 cpm/Bq-m3 (C.F. is 25.42.5 Bq/m3/cpm). Its performance is the highest among the same type of commercial available products. This radon monitoring system has been successfully taking data as the background measurement of the experiment for more than half a year, and will continue to provide useful information for the following several years. From the results, the radon levels in the air in Experimental Halls and in the water of water systems were higher than expected, but still at the acceptable levels. Further works have to be done to control them at preferred levels. DOI: 10.5353/th_b5053415 Subjects: Radon measures
Book Synopsis Evaluation of Three Passive-integrating Charcoal Detectors for Measuring Radon Concentrations by : David L. Sharp (CAPT, USAF.)
Download or read book Evaluation of Three Passive-integrating Charcoal Detectors for Measuring Radon Concentrations written by David L. Sharp (CAPT, USAF.) and published by . This book was released on 1990 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Home Radon Monitor Modeled After the Common Smoke Detector by :
Download or read book Home Radon Monitor Modeled After the Common Smoke Detector written by and published by . This book was released on 1995 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: The EPA has declared that five million or so of the nation's 80 million homes may have indoor radon levels that pose an unacceptably high risk of lung cancer to occupants. They estimate that four times as many people die from radon-induced lung cancers as from fires in the home. Therefore the EPA has recommended that all homes be tested and that action be taken to reduce the radon concentration in homes that test above the 4 pCi/L level. The push to have homeowners voluntarily test for elevated radon levels has been only marginally successful. A reliable, inexpensive, and accurate in-home radon monitor designed along the same general lines as a home smoke detector might overcome much of the public reluctance to test homes for radon. Such a Home Radon Monitor (HRM) is under development at Los Alamos National Laboratory. To be acceptable to the public, HRMs should have the following characteristics in common with smoke detectors: low cost, small size, ease of installation and use, low maintenance, and high performance. Recent advances in Long-Range Alpha Detection technology are being used in the design of a HRM that should meet or exceed all these characteristics. A proof-of-principle HRM detector prototype has been constructed and results from tests of this prototype will be presented.
Book Synopsis Advances in Radiation Protection Monitoring by : International Atomic Energy Agency
Download or read book Advances in Radiation Protection Monitoring written by International Atomic Energy Agency and published by . This book was released on 1979 with total page 814 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Radiation Detection by : Douglas McGregor
Download or read book Radiation Detection written by Douglas McGregor and published by CRC Press. This book was released on 2020-08-19 with total page 1286 pages. Available in PDF, EPUB and Kindle. Book excerpt: Radiation Detection: Concepts, Methods, and Devices provides a modern overview of radiation detection devices and radiation measurement methods. The book topics have been selected on the basis of the authors’ many years of experience designing radiation detectors and teaching radiation detection and measurement in a classroom environment. This book is designed to give the reader more than a glimpse at radiation detection devices and a few packaged equations. Rather it seeks to provide an understanding that allows the reader to choose the appropriate detection technology for a particular application, to design detectors, and to competently perform radiation measurements. The authors describe assumptions used to derive frequently encountered equations used in radiation detection and measurement, thereby providing insight when and when not to apply the many approaches used in different aspects of radiation detection. Detailed in many of the chapters are specific aspects of radiation detectors, including comprehensive reviews of the historical development and current state of each topic. Such a review necessarily entails citations to many of the important discoveries, providing a resource to find quickly additional and more detailed information. This book generally has five main themes: Physics and Electrostatics needed to Design Radiation Detectors Properties and Design of Common Radiation Detectors Description and Modeling of the Different Types of Radiation Detectors Radiation Measurements and Subsequent Analysis Introductory Electronics Used for Radiation Detectors Topics covered include atomic and nuclear physics, radiation interactions, sources of radiation, and background radiation. Detector operation is addressed with chapters on radiation counting statistics, radiation source and detector effects, electrostatics for signal generation, solid-state and semiconductor physics, background radiations, and radiation counting and spectroscopy. Detectors for gamma-rays, charged-particles, and neutrons are detailed in chapters on gas-filled, scintillator, semiconductor, thermoluminescence and optically stimulated luminescence, photographic film, and a variety of other detection devices.
Book Synopsis Development of a Portable Radon Detection System by : J. W. Allen
Download or read book Development of a Portable Radon Detection System written by J. W. Allen and published by . This book was released on 1976 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 1987 with total page 566 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Très belles estampes en couleurs du XVIII s. - Estampes anciennes et modernes by :
Download or read book Très belles estampes en couleurs du XVIII s. - Estampes anciennes et modernes written by and published by . This book was released on 1914 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Detection and Measurement of the Activity Size Distributions (d(p) Greater Than 0.5 Nm) Associated with Radon Decay Products in Indoor Air by : Mukund Ramamurthi
Download or read book The Detection and Measurement of the Activity Size Distributions (d(p) Greater Than 0.5 Nm) Associated with Radon Decay Products in Indoor Air written by Mukund Ramamurthi and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The infiltration of radon into the indoor environment may cause the exposure of the public to excessive amounts of radioactivity and has spurred renewed research interest over the past several years into the occurrence and properties of radon and its decay products in indoor air. The public health risks posed by the inhalation and subsequent lung deposition of the decay products of Rn-222 have particularly warranted the study of their diffusivity and attachment to molecular cluster aerosols in the ultrafine particle size range (0.5$-$5 nm) and to accumulation mode aerosols. In this research, a system for the detection and measurement of the activity size distributions and concentration levels of radon decay products in indoor environments has been developed. The system is microcomputer-controlled and involves a combination of multiple wire screen sampler-detector units operated in parallel. The detection of the radioactivity attached to the aerosol sampled in these units permits the determination of the radon daughter activity-weighted size distributions and concentration levels in indoor air on a semi-continuous basis. The development of the system involved the design of the detection and measurement system, its experimental characterization and testing in a radon-aerosol chamber, and numerical studies for the optimization of the design and operating parameters of the system. Several concepts of utility to aerosol size distribution measurement methods sampling the ultrafine cluster size range evolved from this study, and are discussed in various chapters of this dissertation. The optimized multiple wire screen (Graded Screen Array) system described in this dissertation is based on these concepts. The principal facet of the system is its ability to make unattended measurements of activity size distributions and concentration levels of radon decay products on a semi-continuous basis. Thus, the capability of monitoring changes in the activity concentrations and size distributions as a function of both time and indoor events is now available. Future work with the system will involve field measurements of radon decay product activity size distributions and concentrations in various indoor environments. The resultant information should permit a better estimation of the potential human health hazard from the inhalation of radon decay products present in indoor air.
Author :OECD Nuclear Energy Agency Publisher :Nuclear Energy Agency, Organisation for Economic Co-operation and Development ; [Washington, D.C. : OECD Publications and Information Center ISBN 13 : Total Pages :160 pages Book Rating :4.3/5 (91 download)
Book Synopsis Metrology and Monitoring of Radon, Thoron, and Their Daughter Products by : OECD Nuclear Energy Agency
Download or read book Metrology and Monitoring of Radon, Thoron, and Their Daughter Products written by OECD Nuclear Energy Agency and published by Nuclear Energy Agency, Organisation for Economic Co-operation and Development ; [Washington, D.C. : OECD Publications and Information Center. This book was released on 1985 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Radon: A Tracer for Geological, Geophysical and Geochemical Studies by : Mark Baskaran
Download or read book Radon: A Tracer for Geological, Geophysical and Geochemical Studies written by Mark Baskaran and published by Springer. This book was released on 2016-08-11 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reviews all the major research accomplishments and summarizes the different applications of radon. It serves as a solid reference book for researchers who are interested in the U-series radionuclides and noble gases as tracers and chronometers. Radon has been widely utilized as a powerful tracer to quantify a number of processes that include gas exchange rates between air and water, submarine groundwater discharge in coastal waters, water exchange between rivers and lakes, ocean circulation, hydrocarbon and uranium exploration. It is also used as an atmospheric tracer for the identification and quantification of air masses and as a tool for earthquake prediction, etc. A significant portion of the book presents state-of-the knowledge on indoor-radon-related health issues. Applications of the decay-series of Rn-222 are presented in a chapter. It serves as a reference and a state-of-the-art resource for researchers who want to learn the different applications of radon in Earth systems.
Download or read book INIS Atomindex written by and published by . This book was released on 1975 with total page 946 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Development of the Customized Radon Detector and Studies of the Radon Background Onsite for the Daya Bay Reactor Neutrino Experiment by : Kar-Yee Leung
Download or read book Development of the Customized Radon Detector and Studies of the Radon Background Onsite for the Daya Bay Reactor Neutrino Experiment written by Kar-Yee Leung and published by Open Dissertation Press. This book was released on 2017-01-26 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Development of the Customized Radon Detector and Studies of the Radon Background Onsite for the Daya Bay Reactor Neutrino Experiment" by Kar-yee, Leung, 梁嘉怡, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: The goal of the Daya Bay Reactor Neutrino Experiment is to determine the last unknown neutrino mixing angle θ13, in sin22θ13 to sensitivity better than 0.01 at 90% confidential level in three years of running. In order to reach the goal, background from natural radiation should be controlled less than 50 Hz, accordingly radon, which is a naturally-occurring radioactive gas, is one of the factors need to be monitored. A High-sensitivity and High-reliability Hong Kong (H3) radon monitoring system is developed to support the slow control system of the experiment. It achieves the sensitivity requirement and fulfills the data acquisition specification by using an enlarged sample chamber, an improved electronic and a designed software, in addition to the dehumidifier system for long term use. Four final products of the radon detector were well calibrated and tested before application; the sensitivities of counted progenies Po-218 and Po-214 are 3.65 0.37 x10-2 cpm/Bq-m3 (C.F.is 27.42.7 Bq/m3/cpm) and 3.94 0.40 x10-2 cpm/Bq-m3 (C.F. is 25.42.5 Bq/m3/cpm). Its performance is the highest among the same type of commercial available products. This radon monitoring system has been successfully taking data as the background measurement of the experiment for more than half a year, and will continue to provide useful information for the following several years. From the results, the radon levels in the air in Experimental Halls and in the water of water systems were higher than expected, but still at the acceptable levels. Further works have to be done to control them at preferred levels. DOI: 10.5353/th_b5053415 Subjects: Radon measures
