The influence of air conditioning changes on the effective dose due to radon and its short-lived decay products

• Autorzy: Grządziel A. , Kozak K. , Mazur J. , Połednik B. , Dudzińska M. R. , Bilska I.

Identyfikatory

DOI

10.1515/nuka-2016-0040

• Konferencja: International Conference „Radon in the Environment” (2nd ; 25-29.05.2015 ; Kraków, Poland)
• Języki publikacji: EN

Abstrakty

EN

Most people spend the majority of their time in indoor environments where the level of harmful pollutants is often significantly higher than outdoors. Radon (222Rn) and its decay products are the example of radioactive pollutants. These radioisotopes are the main source of ionizing radiation in non-industrial buildings. The aim of the study was to determine the impact of air-conditioning system on radon and its progeny concentrations and thus on the effective dose. The measurements were carried out in the auditorium at the Environmental Engineering Faculty (Lublin University of Technology, Poland). Measurements of radon and its progeny (in attached and unattached fractions) as well as measurements of the following indoor air parameters were performed in two air-conditioning (AC) operation modes: AC ON and AC ON/OFF. The air supply rate and air recirculation were taken into consideration. The separation of radon progeny into attached and unattached fractions allowed for determining, respectively, the dose conversion factor (DCF) and the inhalation dose for teachers and students in the auditorium. A considerable increase of the mean radon progeny concentrations from 1.2 Bq/m3 to 5.0 Bq/m3 was observed in the AC ON/OFF mode compared to the AC ON mode. This also resulted in the increase of the inhalation dose from 0.005 mSv/y to 0.016 mSv/y (for 200 h/year). Furthermore, the change of the air recirculation rate from 0% to 80% resulted in a decrease of the mean radon concentration from 30 Bq/m3 to 12 Bq/m3 and the reduction of the mean radon progeny concentration from 1.4 Bq/m3 to 0.8 Bq/m3. This resulted in the reduction of the inhalation dose from 0.006 mSv/y to 0.003 mSv/y.

Słowa kluczowe

EN

radon; radon progeny; attached fraction of radon progeny; unattached fraction of radon progeny; dose conversion factor

• Wydawca: Institute of Nuclear Chemistry and Technology
• Czasopismo: Nukleonika
• Rocznik: 2016
• Tom: Vol. 61, No. 3
• Strony: 239--244
• Opis fizyczny: Bibliogr. 17 poz., rys.

Twórcy

autor

Grządziel A.

• Institute of Nuclear Physics PAN, 152 Radzikowskiego Str., 31-342 Kraków, Poland, Tel.: [phone], Fax: [phone]

autor

Kozak K.

• Institute of Nuclear Physics PAN, 152 Radzikowskiego Str., 31-342 Kraków, Poland, Tel.: [phone], Fax: [phone]

autor

Mazur J.

• Institute of Nuclear Physics PAN, 152 Radzikowskiego Str., 31-342 Kraków, Poland, Tel.: [phone], Fax: [phone]

autor

Połednik B.

• Lublin University of Technology, 40B Nadbystrzycka Str., 20-618 Lublin, Poland

autor

Dudzińska M. R.

• Lublin University of Technology, 40B Nadbystrzycka Str., 20-618 Lublin, Poland

autor

Bilska I.

• Lublin University of Technology, 40B Nadbystrzycka Str., 20-618 Lublin, Poland

Bibliografia

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• 2. Kozak, K., Mazur, J., Kozlowska, B., Karpińska, M., Przylibski, T. A., Mamont-Cieśla, K., Grządziel, D., Stawarz, O., Wysocka, M., Dorda, J., Żebrowski, A., Olszewski, J., Hovhannisyan, H., Dohojda, M., Kapała, J., Chmielewska, I., Kłos, B., Jankowski, J., Mnich, S., & Kołodziej, R. (2011). Correction factors for determination of annual average radon concentration in dwellings of Poland resulting from seasonal variability of indoor radon. Appl. Radiat.Isot., 69, 1459–1465.
• 3. Somlai, J., Jobbágy, V., Kovács, J., Németh, Cs., & Kovács, T. (2008). Connection between radon emanation and some structural properties of coal-slag as building material. Radiat. Meas., 43(1), 72–76.
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• 5. Połednik, B., Dudzińska, M. R., Kozak, K., Mazur, J., & Gazda, L. (2012). The impact of the indoor air parameters on the dynamics of radon and its decay products concentration changes. In Proceedings of Healthy Building, 8–12 July 2012 (pp. 2B.8). Brisbane, Australia.
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Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.