Wyniki wyszukiwania - BazTech

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Vaasma Taavi, Kiisk Madis, Leier Maria, Suursoo Siiri, Jantsikene Alar, Putk Kaisa

Journal of Sustainable Mining

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2019

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Vol. 18, iss. 2

86--93

EN

There is incomplete information available concerning NORM-related (naturally occurring radioactive material) industries in Estonia. In order to fill the gap in this knowledge, a nationwide study was carried out between 2015 and 2017 to determine and radiologically characterize potential NORM-related industries. The study included compiling available literature and studies as well as on-site measurements (external dose rate and radon) and samplings in multiple industries, which had been determined to be potential NORM creators. The results from this study concluded that there are 3 industries in Estonia where the activity concentrations of naturally occurring radionuclides can reach an increased level which may require further regulatory control. Radionuclide exemption values were clearly exceeded in the filter materials of drinking water treatment plants that use water from Cambrian-Vendian aquifer. 226Ra and 228Ra values in filter materials reached over 40 kBq kg−1. Additionally, the gross radionuclide activity concentrations of 238U and 232Th in waste from a rare metal production industry reached up to 191 kBq kg−1. Clinker dust from the cement industry showed elevated concentrations of 210Pb, rising to over 2 kBq kg−1 in fine clinker dust. The creation of a national NORM inventory can be the basis for establishing a national NORM strategy for the management of NORM residues. This work provides a thorough overview of the radiological parameters of the potential NORM-related industries, describes the radionuclides that have elevated concentrations, provides estimations on their yearly creation amounts and produces input for determining possible NORM management options.

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Natural radionuclides (NORM) in a Moroccan river affected by former conventional metal mining activities

Manjón Guillermo, Mantero Juan, Vioque Ignacio, Díaz-Francés Inmaculada, Galván José Antonio, Chakiri Said, Choukri Abdelmajid, García-Tenorio Rafael

Journal of Sustainable Mining

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2019

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Vol. 18, iss. 1

45--51

EN

The main aim of this work was to determine the levels of multiple natural radionuclides in an aquatic system (Moulouya river, Morocco) impacted by multiple abandoned Zinc and Lead mines. 238U, 234U, 232Th, 230Th and 210Po were determined by alpha-particle spectrometry in water and sediment samples collected along the river and in samples from three pit lakes of abandoned mines, located in the Upper Moulouya catchment area. The results enabled the analysis of the different levels of impact of former mining activities, depending on the natural radionuclides. While the activity concentration of U-isotopes in Moulouya river water was slightly elevated in the vicinity of abandoned mine wastes, other natural radionuclides (Th-isotopes and 210Po) levels were typical of a natural environment. This fact is clearly reflected in the magnitude and range observed in the distribution coefficients for the different radionuclides analyzed.

3

NORM in building materials

Chingiz A.

Prace Naukowe GIG. Górnictwo i Środowisko / Główny Instytut Górnictwa

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2004

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nr 1

26-27

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Application of international safety standards to work involving exposure to natural radiation

Wymer D.

Prace Naukowe GIG. Górnictwo i Środowisko / Główny Instytut Górnictwa

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2004

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nr 1

73-74