Exhalation rate of radon-222 from concrete and cement mortar

• Autorzy: Perna A. F. N. , Paschuk S.A. , Corrêa J. N. , Narloch D. C. , Barreto R. C. , Del Claro F. , Denyak V.

Identyfikatory

DOI

10.2478/nuka-2018-0008

• Konferencja: International Conference on Developments and Applications of Nuclear Technologies – NUTECH-2017 (10–13. 10. 2017, Kraków, Poland)
• Języki publikacji: EN

Abstrakty

EN

The main sources of radon in the air of dwellings are soil, building materials, and groundwater. This study aimed to determine the exhalation rate of 222Rn from samples made of concrete and cement mortars, as well as to evaluate by means of gamma spectrometry the hazard indexes associated with other radionuclides present in the studied samples of building materials. The results obtained allowed the comparison of the exhalation rate of radon using theoretical calculations based on one-dimensional and three-dimensional models. Measurements of the activity concentration of radon in air was performed by AlphaGuard radon detector. Furthermore, obtained results were compared with the measurements performed inside the concrete test cells. These test cells were built with the aim of simulating a dwelling in small dimensions and to evaluate indoor radon activity associated with concrete. Consequently, the obtained results of radon exhalation rate, in becquerel per meter squared per hour, for the concrete was 2.55 ± 0.03 Bq·h–1·m–2 for the 1D model and 0.461 ± 0.008 Bq·h–1·m–2 for the 3D model. The exhalation rate of radon, for the cement mortar was 1.58 ± 0.03 Bq·h–1·m–2 for the 1D model and 0.439 ± 0.011 Bq·h–1·m–2 for the 3D model. The indoor concentration of 222Rn from the test cell was 112 ± 9 Bq/m3 . These values were below the limit of 300 Bq/m3 recommended by the International Commission on Radiological Protection (ICRP) and <148 Bq/m3 , the limit recommended by the US Environmental Protection Agency (US EPA). Even so, these values should be the subject of concern since that activity is related only to the contribution of concrete walls.

Słowa kluczowe

EN

cement mortar; concrete; exhalation rate; radon-222

• Wydawca: Institute of Nuclear Chemistry and Technology
• Czasopismo: Nukleonika
• Rocznik: 2018
• Tom: Vol. 63, No. 3
• Strony: 65--72
• Opis fizyczny: Bibliogr. 23 poz., rys.

Twórcy

autor

Perna A. F. N.

• Federal University of Technology – Paraná, UTFPR Av. Sete de Setembro, 3165, Curitiba – PR CEP 80230-90, Brazil

autor

Paschuk S.A.

• Federal University of Technology – Paraná, UTFPR Av. Sete de Setembro, 3165, Curitiba – PR CEP 80230-90, Brazil

autor

Corrêa J. N.

• Federal University of Technology – Paraná, UTFPR Av. Sete de Setembro, 3165, Curitiba – PR CEP 80230-90, Brazil

autor

Narloch D. C.

• Federal University of Technology – Paraná, UTFPR Av. Sete de Setembro, 3165, Curitiba – PR CEP 80230-90, Brazil

autor

Barreto R. C.

• Federal University of Technology – Paraná, UTFPR Av. Sete de Setembro, 3165, Curitiba – PR CEP 80230-90, Brazil

autor

Del Claro F.

• Federal University of Technology – Paraná, UTFPR Av. Sete de Setembro, 3165, Curitiba – PR CEP 80230-90, Brazil

autor

Denyak V.

• Pelé Pequeno Príncipe Research Institute Av. Silva Jardim, 1632, Curitiba – PR CEP 80250-060, Brazil

Bibliografia

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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).