Evaluation of Natural Radiation in Houses Built With Black Schist

Abstract

Natural radiation in houses built with black schist slabs located at an altitude of 1,000 m in the mountainous southern part of Taiwan were investigated by studying the naturally occurring radionuclides present in the black schist. Both indoor and outdoor radon concentrations were monitored. The cosmic-ray contribution to the dose received by the inhabitants was also estimated. Gamma-ray spectroscopy was performed for radionuclide analyses. In situ measurements were carried out using a survey meter coupled to a sodium iodide detector. Cellulose nitrate films, ZnS (Ag) scintillation cells, and alpha spectroscopy were used to study radon and radon daughters. Radiation doses due to all natural sources were calculated and compared with that incurred in common concrete dwellings at lower altitudes.

Determination of the Concentration of 40K of Mudstone in Northern Iraq by Using Gamma Ray Spectroscopy and Flame Photometry Technique

“…The concentration of potassium in the remaining countries was lower than the results of this study which excepts being very low in Vietnam and Nigeria. Kiss et al, (1988) Mexico(Zacatecas and Guandalupe) 530 Mireles et al, (2003) Pakistan(Lahore) 561.6 Akhtar et al, (2005) Spain 578 Quindós et al, (1994) Brazil (Rio Grande do Norte) 704 Malanca et al, (1996) Japan 794 Chen et al, (1993) Northern Iraq 821 This study (2012) Bangaladish(Southern districts) 833 Chowdhury et al, (2006) Egypt (Farm soil) 1233 Ahmed and El-Arabi (2005) Nile island , s soil 1636 Ahmed and El-Arabi (2005)…”

Monitoring of terrestrial gamma radiation exposure in different geological Stress conditions of Uttarakhand Himalayan region, India

“…The external irradiation of gamma rays emitted from radionuclides inhaled into lungs causes low-level dose effects in the public living in the exposure to naturally ionizing radiation. Monitoring and measurement of TGRD background levels is vital to assess the dose to the population [2,3]. The understanding of spatial distribution of natural radiation in the water and soil on the basis of local geologic formations is highly valuable because of its radiological effects.…”