results significantly high levels of radon gas were found mostly in water and residential buildings. conclusions it conclusion with regard to the study of building materials, granite stone and adobe coverings cannot be recommended for construction purposes. materials and methods the most important route of exposure to such radiation is indoor places. in this investigation measurement of radon i...

background: a substantial part of the public’s natural radiation dose is due to the inhalation of radon gas. most of the exposure occurs indoors where the airborne concentration of radon and its decay products is usually higher than outdoors. materials and methods: radon activity concentration has been measured twice in 50 classrooms in 5 levels (10 each) during summer and winter using solid-st...

The representative organizations of the sector of ornamental rocks had looked the Commission of Nuclear Energy by means of the Center of Mineral Technology Espirito Santo (CETEM-ES) requesting aid how much the evaluation of levels of radiation in Brazilian ornamental rocks, exported to U.S.A. for use as material coverings in residences. Exhalation of radon (Rn) from these exotic granites may ex...

Abstract In this study, samples of building material additives were analyzed for naturally occurring radioisotope activity such as uranium, radium, and radon. The radon exhalation the annual effective doses, also calculated. activities samples, determined using HPGe gamma spectrometry ionization detector. results used to calculate dose values by RESRAD BUILD code. concentration ranges between 9...

The radon isotopes (Rn-222 and Rn-220) and their progenies are responsible for more than 50% of natural radiation dose and the second leading factor in the case of the development of lung cancer after smoking [1]. Rn-222 (radon) and Rn-220 (thoron) are generated in crustal materials from their natural Ra-226 (U-238 decay series) and Ra-224 (Th-232 decay series) content, respectively. As a resul...

This study was carried out to investigate builds up a rule map on various radiological factors in and around the Euphrates River Iraq. Radon levels, radium content surface mass radon exhalation rates for 20 sediment tests gathered from different districts along River, Iraq, (about 500km long) using can technique, with CR-39 plastic detector. fixation esteems were viewed as going 835.0 2797.7 Bq...

INTRODUCTION The rising public wish for natural residing, new rules for energy and resource saving construction and the interest of the industry on inexpensive raw materials lead to new developments in the field of building materials. In this connection, the isolation of buildings against radon, especially in radon prone areas, shows an inclining interest. A recent German case control study on ...