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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.

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Suitability of rocks and sediments from Brzeszcze and Silesia coal mines as building materials in terms of radiological hazard

Śleziak Monika, Duliński Marek

Nukleonika

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2019

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Vol. 64, No. 2

65--70

EN

The isotope activity concentration of rocks and bottom sediments was evaluated based on the samples collected from sedimentation ponds and gangue repositories. Radium 226Ra, thorium 228Th and potassium 40K activities were measured by gamma spectrometry using high-purity germanium detector – HPGe 4020. The radiation effect resulting from the presence of natural radionuclides was estimated by radiological hazard indices such as f1 and f2 coefficients, radium equivalent, internal and external hazard indices and absorbed dose rate. Performed measurements and calculations have shown that the bottom sediments are most contaminated. They may pose a serious radiological hazard for present and future generations.

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Assessment of Gamma Dose Rate at Mine Waste Dump

Dołhańczuk-Śródka A., Wróbel Ł., Kłos A., Wacławek M.

Ecological Chemistry and Engineering. S

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2013

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Vol. 20, nr 3

555--565

EN

Exploitation of coal deposits in Upper Silesia is associated with production of large quantities of waste deposited at dumps. The tested samples from five dumps showed different radioactivity from each other. Radioactivity measurements made it possible to analyze the degree of risk with the factors specified by UNSCEAR such as radium equivalent activity Raeq, internal Ein and external Eex occupancy factor. There is a raised level of radiation in dumps as compared with outside dump areas. In the study area, however, there is no risk associated with elevated levels of radiation in relation to standards established by the Council of Ministers of the ionizing radiation dose limits.

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Eksploatacja złóż węgla kamiennego na terenie Górnego Śląska związana jest z produkcją bardzo dużych ilości odpadów składowanych na zwałowiskach. Badane próbki z terenów pięciu zwałowisk wykazywały różniącą się od siebie aktywność promieniotwórczą. Wykonane pomiary aktywności promieniotwórczej pozwoliły na dokonanie analizy stopnia zagrożenia za pomocą współczynników określonych przez UNSCEAR, takich jak ekwiwalent aktywności radu Raeq, wewnętrzny Ein i zewnętrzny Eex współczynnik obłożenia. Stwierdzono, że na obszarze zwałowisk występuje podwyższony poziom promieniowania w porównaniu do średniej rejestrowanej na obszarze kraju. Na badanym terenie nie występuje jednak zagrożenie związane z podwyższonym poziomem promieniowania w odniesieniu do norm ustanowionych przez Rozporządzenie Rady Ministrów w sprawie dawek granicznych promieniowania jonizującego.

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Ryzyko zagrożeń chemicznych, biologicznych i radiologicznych

Solarz J.

Zeszyty Naukowe AON

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2010

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nr 1(78)

134-145

EN

Weapons of Mass Destruction (WMD) have been the most powerful and the most dangerous set of weapons for many years. Since their beginnings, the main aim to use them was to be the massive extermination of enemy soldiers on the battlefield, or, in case of nuclear weapon, solving „the problem” due to a massive attack on selected towns or other objects. However, the collapse of bipolar political and military arrangement of the world has led to postponing the ideas to use WMD and to resolve conflicts in a more peaceful way. Nevertheless, a new opponent has entered the international arena, namely various terrorist groups aiming at changing the existing world order. It has also appeared that they have not neglected the WMD huge destructive potential. The article is an attempt to present the idea and level of threat risk generated by chemical, biological and radioactive agents. In order to facilitate understanding, all WMD components and how they can be currently used are discussed. Moreover, their real destructive power and possibilities of practical use in combat and terrorist operations are described. The identification of the mentioned above threats is presented in three periods of the state functioning, i.e. war, crisis and peace. Additionally, probable external conditions that influence their perception and evaluation are defined.

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Natural radiation and its hazard in copper ore mines in Poland

Chau N. D., Jodłowski P., Kalita S. J., Olko P., Chruściel E., Maksymowicz A., Waligórski M., Bilski P., Budzanowski M.

Acta Geophysica

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2008

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Vol. 56, no. 2

505-517

EN

The doses of gamma radiation, concentrations of radium isotopes in water and sediments, radon concentration and concentration of alpha potential energy of radon decay products in the copper ore mine and in the mining region in the vicinity of Lubin town in Poland are presented. These data served as a basis for the assessment of radiological hazard to the mine workers and general public. The results of this assessment indicate that radiological hazard in the region does not differ substantially from typical values associated with natural radiation background. The calculated average annual effective dose for copper miners is 1.48 mSv. In general, copper ore mines can be regarded as radiologically safe workplaces.