3 edition of Radon and Thoron in the Human Environment found in the catalog.
by World Scientific Publishing Company
Written in English
|Contributions||Akira Katase (Editor), Michikuni Shimo (Editor)|
|The Physical Object|
|Number of Pages||578|
The second largest cause of lung cancer is related to radon ( Rn) and its progenies in our environment. Building materials, such as concrete, contribute to the production of radon gas through the natural decay of U from its constituents. This Radon has been recognized as one of the major contributor to the natural radiation and health hazards in the human dwellings. Comparison is an important role in the quality control and quality assurance for any measuring system. Due to the future legal regulations regarding radon levels in the air, maintaining the system quality and harmonization of results as well as validation of radon and thoron measuring systems is important. The aim of this work is to validate the degrees of equivalence and measurement.
Get This Book. Visit to get more information about this book, Harley, N.H., and B. S. Pastemack. Environmental radon daughter alpha dose factors in a five-lobed human lung. Health Phys. Experimental data and theoretical models for the dosimetry of human exposure to radon and thoron progeny. DOE/Technical. Natural radon (Rn) and thoron (Rn) can be used as tracers of various chemical and physical processes in the environment. We present here results from an extended series of laboratory experiments intended to improve the automated analysis of Rn and Rn in water using a modified RAD AQUA (Durridge Inc.) system. Previous experience with similar equipment showed that it takes .
Radon. Radon is a colorless, odorless, tasteless radioactive gas that comes from the decay of. radium, which is present in nearly all rocks and soils. Most of our exposure to naturally occurring radiation is from indoor radon. Since radon gas emits alpha. particles, inhaling it can cause cancer. Radon can seep into buildings from the ground. Radon, chemical element, a heavy radioactive gas of Group 18 (noble gases) of the periodic table, generated by the radioactive decay of radium. It is a colorless gas, times heavier than air and more than times heavier than hydrogen. Learn more about radon in this article.
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Radon and Thoron in the Human Environment [Katase, Akira, Shimo, Michikuni] on *FREE* shipping on qualifying offers. Radon and Thoron in the Human Environment. Radon measurements in soil and water and its relation with geology, Garhwal Himalaya, India.
Prediction of the earthquake in the western Japan from the change of radon concentrations in air. Environmental radon and thoron. Modeling radon flux from the earth's surface. Modelling of radon. Purchase Radon in the Environment, Volume 40 - 1st Edition.
Print Book & E-Book. ISBNBook Edition: 1. Quick Search in Books. Enter words / phrases / DOI / ISBN / keywords / authors / etc. Search Search. Radon and Thoron in the Human Environment. Proceedings of the 7th Tohwa University International Symposium. 7th Tohwa University International Symposium, Fukuoka, Japan, 23 – 25 October ♥ Book Title: Radon And Thoron In The Human Environment - Proceedings Of The 7th Tohwa Univ International Symposium ♣ Name Author: Katase Akira ∞ Launching: Info ISBN Link: ⊗ Detail ISBN code: X ⊕ Number Pages: Total sheet ♮ News id: D-2xDgAAQBAJ Download File Start Reading.
Radon and thoron. Radon concentration in the tunnels of a hydroelectric power station under construction in Italy, a case study (S. Verdelocco, D. Walker, P. Turkowsky). Determination of the radon potential of a building by a controlled depressurisation technique (RACODE) (W.
Ringer et al.). Population exposure to inhaled radon and thoron. Abstract. Radon is the single major contributor to the ionizing radiation dose, about half of the total radiation exposure, received by the human population and is the second most frequent cause of lung cancer (3–14 % of all lung cancer is attributable to radon) after smoking.
INTRODUCTION The greatest fraction of the natural radiation exposure in humans results from inhalation of the short-lived decay products of radon (Rn) and thoron (22n), which occur in the free atmosphere and in higher concentrations in the room air of buildings.
The "radonproblem" was first recognized among workers in mines. Sci Total Environ. Apr 15; Inhalation of indoor radon (()Rn) and thoron (()Rn) decay products is the most important source of exposure to ionizing radiation for the human respiratory tract. Decreasing ventilation rates due to energy saving reasons in new buildings.
Radon is commonly referred to as thoron, since it is a natural decay product of the most stable thorium isotope (thorium). Radon is a member of thorium series. All isotopes of radon are radioactive, but the two radon isotopes radon and radon are very important from radiation protection point of view.
Radon is a naturally occurring radioactive gas generated by the decay of uranium- and thorium-bearing minerals in rocks and soils.
Radon and its decay products are the major contributors to human exposure from natural radiation sources(1). Radon has been identified as the second leading cause of lung cancer after tobacco smoking(2).
Environmental radiation exists as a consequence of cosmic, terrestrial and man made sources. Terrestrial radiation are emitted from natural radionuclide present in varying amounts in all types of soils, rocks, air, water and other environmental materials; radon is emitted from the soil surface, although secondary contributors include the oceans, natural gas, geothermal fluids, volcanic gases.
Summary: These proceedings constitute a study of radon and thoron in the human environment. Topics addressed include measurements and calibration, environmental radon and thoron, radon in the water, indoor radon and thoron, and dosimetry and health physics. Radon is a natural radioactive gas used to estimate the radioactive hazard in the environment.
Radon (Rn), which is one of the daughters of uranium (U), represents the most essential isotope, with a half-life of days. The associated health risks due to inhalation and ingestion of radon and its progeny when present in enhanced levels in an indoor environment like a human.
Introduction. Radon and thoron gases can become airborne under favorable conditions and accumulate in confined spaces such as dwellings thus becoming significant sources of internal radiation exposure ().While the importance of indoor radon to lung cancer is well documented, that of indoor thoron is largely main source of the isotopes in (modern) houses is soil-gas.
of radon in environment from soil, while minimum of indoor radon/thoron concentrations is found to vary from 11 to 58 Bqm⁻³ with an average value of 29 ± 9 Bqm⁻³ and from 25 to Bqm. Radon was discovered in but it was not until the 's that an awareness of its potential as a hazard to humans developed.
This resulted primarily from a recognition of the high levels of exposure for uranium miners. Measurement of high concentrations of radon in homes led environmental health agencies to focus on radon as a health hazard and has resulted in concern from scientists, the 5/5(1).
Radon (radon) and thoron (radon) are main contributors of the annual effective dose for the public globally. In situations where thorium-rich building materials have been unintentionally used indoors, the amount of thoron is often higher than the amount of radon.
Samples of soil originating from the weathering of granite rock were sieved into eight classes of particle size. Each sieved sample was measured for its content of Ra (parent nuclide of radon), Ra (parent nuclide of thoron), Ac (grandparent nuclide of Ra), K, Ca, and Fe as well as for the radon and thoron emanation from it.
There was a trend for the contents of Ra and Thoron interference in radon measurements using passive diffusion radon detectors/monitors is a crucial problem when it comes to assessing the internal exposure to radon precisely.
The present study reported, as one of the potential factors, the effects of air flow conditions on changes in thoron interference. Rates of thoron infiltration (as thoron interference) into the diffusion chamber of.
Rijksuniversiteit Groningen founded in - top university. Sluiten. Menu en zoeken; Contact; My University; Student Portal.The paper presents results of radon (Rn) and thoron (Rn) levels in different parts of some selected plants used in Moroccan cooking and traditional medicine.
Plant uptake of radionuclide is one of many vectors for introduction of contaminants into the human food chain. Thus, it is critical to understand the soil–plant relationships that control nuclide bioavailability.The radon/thoron concentrations, equilibrium factors, progeny concentrations and dose rates for 25 dwellings in Kullu and Kangra districts are summarized in Table concentration varies from Bq m −3 to Bq m −3 while the thoron concentration varies from Bq m −3 to Bq m − equilibrium factors for radon and thoron vary from to and from to