Background: Many public health agencies rank residential radon exposure as the second leading cause of lung cancer after cigarette smoking. It has been shown that the risk coefficient for lung cancer is higher for children than that for adults. Therefore, indoor radon measurements were carried out in the elementary schools of Tulkarem province, West Bank, Palestine. Materials and Methods: Two h...

Measurement of radon is very important in dwellings because of its radiological impact on public health. Radon contributes more than half of the total ionizing radiation dose. It is known from the recent surveys in many countries that radon is the second cause of lungs cancer after smoking. In this context, we have measured radon ( 222 Rn) concentration in different dwellings of Kathmandu valle...

Solid-state nuclear track detectors (SSNTDs), such as LR 115, have been commonly used in diffusion chambers for long-term measurements of radon gas concentrations. For the LR 115 SSNTD, it has been found that the active layer removed during chemical etching is significantly affected by the presence and amount of stirring, and thus cannot be controlled easily. However, the sensitivity of the LR ...

AN INVESTIGATION ON RADON AND THORON RESPONSE OF ALPHA-TRACK DETECTORS USED IN THE WINNIPEG CASE–CONTROL STUDY Jing Chen1,*, Bill Walker1, Atsuyuki Sorimachi2, Hiroyuki Takahashi2 and Shinji Tokonami2 Radiation Protection Bureau, Health Canada, 775 Brookfield Road, Ottawa, Canada K1A 1C1 Research Center for Radiation Protection, National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage-...

The 'proxy equilibrium factor' (F(p)) method has been developed for long-term determination of airborne radon progeny concentrations using LR 115 solid-state nuclear track detectors. In this paper, the effects of (220)Rn on the F(p) method have been studied. The correction to the track density was related to a parameter α which was the ratio of the sum of activity concentrations of alpha-partic...

The present study involves the measurement of radionuclide contents and radon/thoron exhalation rate in soil samples collected from 30 villages Jammu district, J & K, India. Thallium-doped sodium iodide detector advanced Smart Rn Duo monitor were used for rates. radon flux was also measured by using a surface chamber technique. mass has been found to vary 15 ± 0.4 38 0.8 mBq kg?1 h?1, while tho...

Alpha and beta activities per unit volume of air, due to radon, thoron and their decay products were measured in the outdoor atmosphere in Errachidia city, Morocco, by using both CR-39 and LR-115 type II solid-state nuclear track detectors (SSNTDs). Simultaneously, meteorological parameters such as air temperature, atmospheric pressure, and relative humidity were also measured in situ.. In addi...

Keramatollah Akbari, Jafar Mahmoudi TDI researcher at ACECR, Iran and Mälardalen University, PhD student, School of Sustainable Development of Society and Technology, Västeras, Sweden [email protected] Mälardalen University, Adj Professor at School of Sustainable Development of Society and Technology, Västeras, Sweden [email protected] Abstract A heat recovery ventilation system en...

Groundwater radon levels of 83 Bq/L (2240 PC&) generated indoor radon levels >3300 Bq/m3 (89 pCi/L) at a commercial fish hatchery. Passive and active mitigation strategies to reduce the waterborne radon levels included a packed column, a waterfall through perforated grates, surface aeration, and bottom bubblers. Though waterborne co~centrations were reduced up to 83% using a combination of miti...

Radon is the most important source of natural radiation to human beings and second major causative agent lung cancer other than smoking. In recent years, hazards exposure thoron (Rn-220), another isotope radon, its progeny have gained consensus. To accurately evaluate dose level Rn-220 progeny, a standard chamber with strong regulation ability for needs be established scale or calibration measu...