Implication and hazard of radiation level in the building materials

Керур, Б. Р.; Rajeshwari, T.; Siddanna, Rajesh; Kumar, Anil

doi:10.2478/s11600-013-0109-1

Cited by 6 publications

(4 citation statements)

References 10 publications

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“…In particular, for internal dose contribution evaluation, are determined the bricks radioactive contents of the principal Naturally Occurring Radioactive Materials (NORM), found in all the building materials on the earth surface [2,3,4], as the natural decay series of nat U, 232 Th and of the 40 K radioactive isotope. In each considered radioactive chain, unstable nuclei decay by emitting α, β or γ radiation until a stable lead is reached [5,6].…”

Section: Introductionmentioning

confidence: 99%

Thermoluminescence dating of historical buildings as a tool for assessing natural radioactivity risk

Galvagno,

D\'Anna,

Gueli

et al. 2023

Proceedings of the 2022 IMEKO TC4 International Conference on Metrology for Archaeology and Cultural Heritage

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The absolute dating of historical buildings through thermally stimulated luminescence techniques involves also in situ and extra situ dosimetry techniques. The age calculation for brick sampled is obtained from the ratio between the absorbed dose through luminescence measurements and the annual dose through the U, Th and K contents and the environmental dose values at the sampling site. The radioactive contents of the sample and the environmental dose values can be used not only for dating purposes, but also to make assessments related to the level of natural radioactivity present in building materials in the case of historic buildings. The present study considered available data of samples from six sites in eastern Sicily. The analyses performed revealed a correlation between the environmental dose and the latitude of the sites from which the samples came and between the K and Th contents.

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Section: Introductionmentioning

confidence: 99%

Thermoluminescence dating of historical buildings as a tool for assessing natural radioactivity risk

Galvagno,

D\'Anna,

Gueli

et al. 2023

Proceedings of the 2022 IMEKO TC4 International Conference on Metrology for Archaeology and Cultural Heritage

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“…Indoor air quality (IAQ) is crucial to human health and work efficiency, 1,2 especially in dwellings and office buildings where people spend much of their time indoors. [3][4][5] The presence of microorganisms, for example, bacteria, fungi and viruses have been recognized as an essential issue that could affect the IAQ. 6,7 Exposure to different types and levels of bacteria or fungi may potentially pose various health effects, such as pneumonia, influenza, measles, asthma, allergies, gastrointestinal illness, and even cancer.…”

Section: Introductionmentioning

confidence: 99%

Comparison of airborne bacteria and fungi in different types of buildings in a temperate climate zone city, Kunming, China

Wang

Qian

Sun

et al. 2022

Indoor and Built Environment

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The characteristics of airborne bacteria and fungi in different types of buildings are still unclear. This article applied the culturing and next-generation sequencing methods to characterize the airborne bacteria and fungi in five types of buildings during winter in Kunming, China. Results showed that the mean concentrations of fungi in different buildings were similar (approx. 387 ± 388 CFU/m3). The highest culturable bacterial concentration was found in residences, while the lowest was in the library. Lowering relative humidity, PM2.5 concentration and occupant density can reduce the bacterial concentrations. The major bacterial size in residences and in a hospital was 1.1–2.1 μm, while in other buildings was 2.1–3.3 μm. The PM2.5 concentration and occupant activities are key factors that could affect the microorganism size distributions . The community structures of the bacteria in the library and fungi in the hospital showed distinctive differences from the results in other buildings. The community structure of outdoor microorganisms showed great differences between soil and air samples. This study is helpful to give practical implications for assessing microbial characteristics in different types of buildings and provide valuable data for the formulation of indoor bioaerosol standards in China.

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“…The details about radiation levels and radionuclide distribution in the environment caught attention worldwide for assessing the effects of radiation exposure [1]. The naturally occurring radionuclides, such as Th-232, Ra-226 and as well their daughter progenies and K-40 emit gamma radiations thereby contributing significantly to enhance the natural background radiation level in the environment [2]. For a wide energy ranges, gamma-ray spectrometry using hyper purity germanium detector (HPGe) is the ideal technique for detecting and quantifying radionuclides [3].…”

Section: Introductionmentioning

confidence: 99%

“…2 , (U A /A) 2 , (U I /I) 2 , (U t /t) 2 and (U M /M) 2 are the measurem uncertainties for the peak net area measurement, activity, gamma yield, counting time and mass sample. The same set of procedures are repeated for RGTh for the gamma energies 209.2 keV,…”

mentioning

confidence: 99%

A Synchronous Electric Motors Resistor and Denistor Smooth Launch Device

2022

JEEE

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The gamma-ray spectrometry using long run used hyper pure germanium (HPGe) detector needs a stringent full energy peak (FEP) efficiency calibration for environmental radioactivity measurements. The FEP efficiency calibration was carried out using the complementary methods like analytical estimations and Monte Carlo (MC) simulations. In our work, for the analytical estimations, the relative deviation of the theoretical results with that of experimental FEP efficiency was found to be less than 6%. However, in the case of MC methodologies, an overall estimated standard deviation of 5% could be achievable only with the optimized geometry of the long run used germanium detector for low-activity environmental measurements.

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Implication and hazard of radiation level in the building materials

Cited by 6 publications

References 10 publications

Thermoluminescence dating of historical buildings as a tool for assessing natural radioactivity risk

Thermoluminescence dating of historical buildings as a tool for assessing natural radioactivity risk

Comparison of airborne bacteria and fungi in different types of buildings in a temperate climate zone city, Kunming, China

A Synchronous Electric Motors Resistor and Denistor Smooth Launch Device

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