Radon events in the U-mine environment and related radiation exposure

• Autorzy: Križman M. J. , Rojc J. , Peter J. E.
• Konferencja: Proceedings of the International Conference "Radon in Environment" 10-14 May 2009, Zakopane Poland
• Języki publikacji: EN

Abstrakty

EN

The term �gradon event�h indicates here a sudden appearance of enhanced radon concentrations, observed like well expressed peaks in time series of radon concentrations. The peaks are superimposed on normal diurnal periodical curves. The characteristics of radon events are high peak values, a rather short duration and a low radon equilibrium factor. Since radon events appear only in the environment near significant radon emission sources, they were investigated in more detail in the case of the former .irovski Vrh uranium mine (Slovenia), using the existing network of continuous radon progeny measuring devices. Eight different types of radon events were identified in the vicinity of the U-mine disposal sites, lasting for some hours and with the range of their peak levels of equilibrium equivalent concentrations (EEC) of radon from a few Bq�Em.3 to over 200 Bq�Em.3. Exposures to radon events in units of Bq�Eh�Em.3 were estimated for adult individuals of the reference group. They resulted in relatively high effective doses of the range 1.5 �ĘSv per a single event, thus exceeding, e.g. the total effective dose for the public due to radioactive discharges from most nuclear facilities during the whole year.

Słowa kluczowe

EN

radon; uranium mine; environment; radon event; effective dose

• Wydawca: Institute of Nuclear Chemistry and Technology
• Czasopismo: Nukleonika
• Rocznik: 2010
• Tom: Vol. 55, No. 4
• Strony: 529--533
• Opis fizyczny: Bibliogr. 8 poz., rys.

Twórcy

autor

Križman M. J.

autor

Rojc J.

autor

Peter J. E.

• Slovenian Nuclear Safety Administration, 16 Železna Str., SI-1000 Ljubljana, Slovenia, Tel.: [phone], Fax: [phone],

Bibliografia

• 1. ICRP (1993) Protection against radon-222 at home and at work. ICRP Publications no. 65. Pergamon Press, Oxford
• 2. Križman MJ (1996) Planning for environmental restoration of contaminated sites in Slovenia. In: Planning for environmental restoration of radioactively contaminated sites in central and eastern Europe. IAEA- TECDOC-865. IAEA, Vienna. Vol. 2, pp 197–218
• 3. Križman MJ, Peter JE, Rojc J (2009) Study on radon dispersion modes from the U-mine disposal sites at Žirovski Vrh (Slovenia). Radioprotect 44;5:469–474
• 4. Križman M, Stegnar P (1992) Environmental impact of the Žirovski vrh uranium mine on the enhancement of outdoor concentrations. Radiat Prot Dosim 45:723–728
• 5. Peter JE (1994) Environmental impact of the uranium mine. Bayerisches StMLU, München (in German)
• 6.Peter JE, Križman M (1994) Long-term measurements of radon and its decay products in the environment by continuous alfa sectrometry. In: Proc of the Conf Strahlenschutz:Physik und Messtechnik, 24–26 May 1994, Karlsruhe, TUV Reinland, Köln, Germany, pp 792–797 (in German)
• 7. Porstendorfer J (1994) Properties and behaviour of radon and thoron and their decay product products in the air. J Aerosol Sci 25;2:219–263
• 8.Raviart S, Richon P, Haristoy D et al. (1996) Field determination of the time varying equilibrium factor between Radon-222 and its short-lived decay products in the atmosphere above a waste rock pile. Environ Int 2:S279–S286