High concentrations of natural radionuclides in building materials can result in high dose rates indoors, from both internal and external exposure. In dose calculations, the main radionuclides of interest are 226Ra, 232Th and 40K. Usually much attention is paid to 226Ra due to 222Rn exhalation and the subsequent internal exposure. Other radionuclides of the uranium series such as 238U and 210Pb...

Usually, phosphate deposits contain 238U and 232Th in addition to their decay products. Due to their different pathways in the environment, the 238U/232Th activity concentration ratio usually found to be greater than unity in phosphate sediments. The presence of these radionuclides creates a potential need to control exposure of workers in the mining and processing activities of the phosphate m...

The research aims to evaluate the radioactivity of samples foodstuffs Consumables in local markets thirteen items were selected which are rice, tea, drinking water, lentils, chickpeas, flour, red bean, crushed chickpeas and milk powder where concentrations specific activity chains uranium (238U), thorium (232Th) potassium (40K) measured using a gamma ray spectra analysis system with high purity...

This study aimed to assess the radiological health implications humans due use of kaolin from mines in Nigeria. A calibrated RS-125 spectrometer was used in-situ monitor activity concentrations 40K, 238U, 232Th and dose-rate minefields Ilorin-south Ilorin-west, The monitoring measurements were done 90 locations selected at random areas. consolidated via laboratory analysis 48 samples Kaolin bri...

Fly bioash (FBA) as a by-product of biomass-fuelled facilities exhibits alkaline properties and is enriched with phytonutrients, thereby offering the potential to effectively ameliorate acidic nutrient-deficient soils. However, concerns about health risks due FBA radioactive contamination are still not well studied, notably under field conditions. This study examined pH changes concentrations n...

In natural water, as a rule, there is violation of radioactive equilibrium in the chain 238U … → 234U 230Th →. Groundwater usually has 234U/238U ratio range 0.8–3.0 (by activity). However, some regions, reaches >10 and up to 50. Ultrahigh excesses can be explained by climatic variations. During cold period, minerals accumulate normal component chain, after melting permafrost, it lost from mi...

a reconnaissance study has been made on the distribution of 238u, 232th, 40k, 137cs andgeochemical features in soil and sediment samples at various locations on the coast of bushehr in the persiangulf. in this study a gamma-ray spectrometer based on a high purity germanium detector and a pc basedmca and x-ray fluorescence (xrf) method were used. estimation of the measured radionuclide contentha...

background: the natural radionuclides are always present in soil and care needs to be taken to minimize the radiation dose to humans. these radionuclides are mostly gamma ray emitting radionuclides which contribute to the radiation dose in long term behavior of radionuclides in soil. health hazards associated with natural radioactivity are of great concern and it is necessary to assess risk due...

background: the aims of the study are to determine the radioactivity concentrations of 226ra, 238u, 232th and 40k in vegetables of a recently found high background radiation area of south-eastern part of bangladesh and to detect the radiological risks to human from intake of these vegetables. materials and method: 10 plant samples were collected randomly from different locations of the study ar...