Results 41 to 50 of about 17,795 (163)

A study of the natural radioactivity and radon exhalation rate in some cements used in India and its radiological significance

Journal of Radiation Research and Applied Sciences, 2016
The presence of natural radioactivity and radon exhalation from building materials contribute to the radiation dose received by human. So, it is essential to evaluate the activity levels of the primordial radionuclides (238U, 226Ra, 232Th and 40K ...
Nisha Sharma, Jaspal Singh, S. Chinna Esakki, R.M. Tripathi   +3 more
doaj   +1 more source

QUANTIFICATION OF BACK DIFFUSION IN RADON AND THORON EXHALATION RATE MEASUREMENTS

Radiation Protection Dosimetry, 2020
Abstract The radon (222Rn) and thoron (220Rn) fluxes from the soil and building materials are the major contributors to their indoor levels. Hence, the measurement of radon and thoron exhalation rates from the source matrix becomes the foremost step in controlling the indoor radon and thoron exposure.
N, Chitra, S Bala, Sundar, V, Subramanian, M T, Jose, R, Baskaran, B, Venkatraman   +5 more
openaire   +2 more sources

Research on the method to measure the average radon exhalation rate of room inner surface

Nuclear Engineering and Technology
In high-rise buildings, radon from building materials is one of the main sources of indoor radon. People spend an average of 80 % of their time indoors every day.
Hongbo Xu, Fen Lin, Shuaibin Liu, Huiying Li, Zhongkai Fan, Ruomei Xie, Xinyue Yang, Xianfa Mao, Shicheng Luo, Chenxi Zu, Feng Xiao, Jia Liu, Yi Liu, Haoyu You, Hao You, Cheng Luo, Hongzhi Yuan, Yanliang Tan   +17 more
doaj   +1 more source

Outdoor 222Rn behaviour in different areas of Slovakia

Nukleonika, 2016
Radon activity concentration (RAC) in the outdoor atmosphere was monitored in four localities of Slovakia. The distance between the localities were up to 130 km. The localities had a diverse orography, ranging from flatland to hilly terrain.
Holý Karol, Műllerová Monika, Bulko Martin, Holá Oľga, Melicherová Terézia   +4 more
doaj   +1 more source

Estimation of indoor radon levels using etched track detector

Journal of Radiation Research and Applied Sciences, 2018
In this investigation, the activity levels of Indoor Radon-222, effective radium contents, exhalation rate of radon, and annual effective dose are reported for different indoor locations (Offices, Laboratories, Meeting rooms, and Storerooms) at two ...
Basma A. El-Badry, Tayseer I. Al-Naggar
doaj   +1 more source

Experimental study on gas permeability and radon control performance of red clay covering layer on uranium mill tailings pond

Scientific Reports
The decommissioning of uranium mill tailings pond generally employs covering layer to diminish radon exhalation, with soil permeability, thickness, and moisture content being essential considerations in assessing the efficacy of radon reduction.
Guokai Xiong, Jianyong Dai, Hong Wang, Pei Lv, Xiangjiang Wang   +4 more
doaj   +1 more source

Verification of the applicability of the RAD7 radon monitor to the solid radon source exhalation reference model

Nuclear Engineering and Technology
The RAD7 radon monitor, based on the electrostatic collection method, is sensitive to humidity during measurements, necessitating the use of a desiccant to maintain the relative humidity in its built-in chamber less than 10 %.
Huiying Li, Ruomei Xie, Zhongkai Fan, Shuaibin Liu, Shuai Yuan, Jiale Sun, Haibo Yi, Zhipeng Liu, Jiulin Wu, Hongzhi Yuan, Yanliang Tan   +10 more
doaj   +1 more source

Exhalation rate of radon-222 from concrete and cement mortar

Nukleonika, 2018
The main sources of radon in the air of dwellings are soil, building materials, and groundwater. This study aimed to determine the exhalation rate of 222Rn from samples made of concrete and cement mortars, as well as to evaluate by means of gamma ...
Perna Allan Felipe Nunes, Paschuk Sergei Anatolyevich, Corrêa Janine Nicolosi, Narloch Danielle Cristine, Barreto Rafael Carvalho, Claro Flávia Del, Denyak Valeriy   +6 more
doaj   +1 more source

Radon exhalation rates corrected for leakage and back diffusion – Evaluation of radon chambers and radon sources with application to ceramic tile

Journal of Radiation Research and Applied Sciences, 2014
The natural radon decay, leakage and back diffusion are the main removal processes of radon from its container. Ignoring these processes leads to underestimate the measured value of radon related parameters like exhalation rate and radium content.
M. Abo-Elmagd
doaj   +1 more source

The Determination of Radon/Thoron Exhalation Rate in an Underground Coal Mine-Preliminary Results. [PDF]

Int J Environ Res Public Health, 2022
Bonczyk M, Chałupnik S, Wysocka M, Grygier A, Hildebrandt R, Tosheva Z.   +5 more
europepmc   +1 more source