Wyniki wyszukiwania - BazTech

1

The impact of the oil and gas industry on NORMs of groundwater and their annual efective dose in Ma’rib, central Yemen

Ali Mohsen M. M., Zhao Hongtao, Li Zhigang, Ahmed O. M. H., Alfasatleh Ibrahim, Maglas Najeeb N. M.

Acta Geophysica

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2020

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Vol. 68, no. 5

1421--1431

EN

The gamma-ray spectrum equipped with a high-purity germanium detector was used to measure the naturally occurring radioactive materials of groundwater samples resources from the petroleum-producing communities of Ma’rib Province-Yemen. Thirty-fve samples were collected from diferent sites. The 40K, 232Th, and 226Ra activity concentrations of groundwater samples for oil and non-oil communities were measured. The annual efective doses due to 40K, 232Th, and 226Ra were calculated and did not show a signifcant health impact. These results can contribute to building a database and provide a general background of the detectable TENORMs for studied areas, which will be useful in any radiological emergency. Signifcantly, the Ma’rib region is rich in oil and gas.

2

Radioactivity concentrations and risk assessment of Tekirdağ lignites (case study of Malkara coalfeld)

Güllüdağ C. Bertan, Aksoy Ercüment, Ünal Neslihan, Özmen Süleyman Fatih

Acta Geophysica

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2020

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Vol. 68, no. 5

1411--1420

EN

Malkara coals are located in the Oligocene-aged Danişmen Formation in the Thrace Tertiary coal basin. The Danişmen Formation consists of limestone, sandstone, tufte, siltstone, claystone and intercalated coal. Elemental and specifc natural radionuclide concentrations of lignites collected from Tekirdağ–Malkara coalfeld were determined, and the associated radiological risk was assessed. In order to examine the depth-dependent radionuclide concentration changes, samples were taken from top, middle and bottom parts of the boreholes. Gamma spectrometric measurements of radionuclide activities were performed with HPGe detector. The calculated mean 226Ra, 232Th and 40K concentrations were 27.0±3.57, 18.9±3.28 and 155±36.1 Bq kg−1, and the measured U, Th, Pb and K concentrations were 4.04, 6.27, 10.6 ppm and 0.82%, respectively. Findings were comparable with the reported literature for Turkey and other countries from the world. The dose due to the radionuclide content of lignites was not very high to pose a serious health risk.

3

Możliwość wykorzystania w budownictwie surowców odpadowych pochodzących z elektrociepłowni warszawskich (2005 ‒2014)

Isajenko K., Piotrowska B., Stawarz O., Obigowski Ł., Łukaszek-Chmielewska A.

Zeszyty Naukowe SGSP / Szkoła Główna Służby Pożarniczej

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2016

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Nr 60 (4)

27--39

PL

Żużel, popiół i mieszanina popiołowo -żużlowa stanowią surowce odpadowe wytwarzane w procesie spalania węgla w elektrociepłowniach. Po wykonaniu pomiarów stężeń naturalnych radionuklidów (potasu 40K, radu 226Ra i toru 228Th) i obliczeniu wskaźników aktywności f1 i f2, a następnie zgodnej z przepisami prawnymi kwalifikacji, surowce te mogą być wykorzystane do produkcji materiałów budowlanych. Centralne Laboratorium Ochrony Radiologicznej prowadzi bazę danych, zawierającą wyniki pomiarów stężenia naturalnych radionuklidów w próbkach surowców i materiałów budowlanych mierzonych na miejscu oraz w ponad 30 laboratoriach w Polsce od 1980 roku do chwili obecnej. W artykule dokonano analizy wyników badań surowców odpadowych (żużel, popiół i mieszanina popiołowo -żużlowa) pochodzących z trzech elektrociepłowni w Warszawie pod kątem określenia zagrożenia radiologicznego dla człowieka i możliwości wykorzystywania tych surowców w różnych rodzajach budownictwa.

EN

Slag, ash and a mixture of ash and slag are the waste materials produced by the combustion of coal in power plants. After the measurement of natural radionuclides (potassium 40K, 226Ra and thorium 228Th) concentration and the calculation of activity indicators f1 and f2, and then in accordance with legal qualifications, these materials may be used for the production of building materials. Central Laboratory for Radiological Protection maintains a database containing the results of measurements of natural radionuclides concentration in samples of raw and building materials measured in CLOR and in more than 30 laboratories in Poland from 1980 up to now. This paper presents an analysis of measurements results of waste materials (slag, ash and a mixture of ash and slag) from three power plants in Warsaw for determining the radiological risk to population and the possibility of their use in various types of construction.

4

Naturalna radioaktywność wód podziemnych w granicie karkonoskim i w metamorfiku izerskim.

Adamczyk-Lorenc A., Bielecka A.

Prace Naukowe Instytutu Górnictwa Politechniki Wrocławskiej. Konferencje

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2007

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Vol. 120, nr 49

7-16

PL

W artykule przedstawiono wyniki pomiarów stężenia radonu w wodach podziemnych na obszarze dwóch jednostek geologicznych Sudetów - granitu karkonoskiego oraz metamorfiku izerskiego. Poruszono problem powszechnego występowania oraz wykorzystywania podziemnych wód radonowych na tym obszarze. Zwrócono również uwagę na konieczność wprowadzenia przepisów regulujących poziom maksymalnego stężenia radonu w wodach pitnych.

5

Radioaktivita stavebnych materialov, surovin a odpadov

Terpakova E.

Zeszyty Naukowe Politechniki Rzeszowskiej. Budownictwo i Inżynieria Środowiska

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2000

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z. 32[180], cz.1

555-562

EN

The natural radioactivity is very important factor of the environment and building of course. Our world is radioactive and has been since it was created. Over 60 radionuclides can be found in nature. Natural radioactivity is common in the rocks and soil, in air, water and oceans, and in our building materials and objects. There is no where on Earth that you can not find the natural radioactivity. As mentioned before, building materials and the different kinds of raw and waste materials have some natural radioactivity in them. The natural radioactivity of these must be evaluated before their application. The rational processing by liquidation or by purposive utilisation of waste is a question of the interest for all over world. The problem of real utilisation of waste in building is a matter of interest since long time, from side of the producers and also from side of building praxis. In the paper will be discussed the question of concrete utilisation of waste materials for building purpose in Slovak building conditions. The Gamaspectrometric method accomplished with apparatus JAK 202 was used to the determination of natural radioactivity of all samples of the building materials. The distribution of radionuclides in waste materials is non-homogenous, so the accuracy and precision of this determination might be problematic some times. The contents of natural radioactivity of products are influenced by the several factors for instance: structure, chemical composition of raw and waste materials, technological procedures of their production There are the present results of the evaluation of different samples of ash, stones, slag's and other materials published in the papers. The special approaches of the choice of composition building products are required from radioactivity point of view.