Studies of the radon progeny particle size distributions in the domestic environment. Epidemiological and dosimetric dose estimates

• Autorzy: Mamont-Cieśla K. , Stawarz O.
• Języki publikacji: EN

Abstrakty

EN

Measurements of the short-lived radon progeny particle size distributions were performed under realistic natural conditions in 54 dwellings in 6 regions of Poland by means of the Radon Progeny Particle Size Spectrometer (RPPSS). The RPPSS comprises a one open face stage, a 4-stage diffusion battery and a 3-stage multi-hole inertial impactor. It was manufactured at the ARPaNSA (Melbourne, Australia), under supervision of Dr S. B. Solomon and supplied with his software. While using the continuous mode, the programme provides analysis of the potential alpha energy concentration on each stage, particle size distributions and weighted dose conversion factors based on the ICRP human respiratory tract model (HRTM) as implemented in the computer code RADEP (radon dose evaluation program). The unattached fraction indoors ranges from ca. 0 to 53% with an arithmetic mean and median of 17%. The equilibrium factor F was observed in the range from 7 to 64% with an arithmetic mean of 32% and median of 29%. The annual effective doses from radon progeny for the general population were estimated according to two models: epidemiological and dosimetric. The mean values of the ratios of the dosimetric to epidemiological dose estimates for the general population (breathing rate 0.78 m3/h) and workers (breathing rate 1.2 m3/h) are 1.0 and 1.4, respectively. The epidemiological dose estimates for the general population are smaller in comparison with the dosimetric estimates for the unattached fraction fp greater than 17%. It was shown that the dependence of the ratio of the doses estimated on the basis of two models on the unattached fraction fp is well described by a linear equation.

Słowa kluczowe

EN

radon progeny particle size distribution (RPPSD); weighted dose conversion factors; dosimetric/epidemiological effective dose estimate; conversion convention; unattached fraction; radon dose evaluation program (RADEP)

• Wydawca: Institute of Nuclear Chemistry and Technology
• Czasopismo: Nukleonika
• Rocznik: 2012
• Tom: Vol. 57, No. 3
• Strony: 411--420
• Opis fizyczny: Bibliogr. 19 poz., rys.

Twórcy

autor

Mamont-Cieśla K.

autor

Stawarz O.

• Central Laboratory for Radiological Protection, 7 Konwaliowa Str., 03-194 Warsaw, Poland, Tel.: [phone], Fax: [phone],

Bibliografia

• 1. Birchall A, James AC (1994) Uncertainty analysis of the effective dose per unit exposure from radon progeny and implications for ICRP risk-weighting factor. Radiat Prot Dosim 53;1/4:133–140
• 2. Cavallo A (2000) The radon equilibrium factor and comparative dosimetry in homes and mines. Radiat Prot Dosim 92;4:295–298
• 3. Cheng YS, Keating JA, Kanapilly GM (1980) Theory and calibration of screen type diffusion battery. J Aerosol Sci 11:549–556
• 4. Cheng YS, Yeh HC (1980) Theory of screen type diffusion battery. J Aerosol Sci 11:313–319
• 5. International Commission on Radiological Protection (1993) Protection against Radon-222 at home and at work. ICRP Publication 65, Ann ICRP 23(2)
• 6. International Commission on Radiological Protection (1994) Human respiratory tract model for radiological protection. ICRP Publication 66, Ann ICRP 24(1–3)
• 7. International Commission on Radiological Protection (2007) The 2007 recommendations of the International Commission on Radiological Protection. ICRP Publication 103, Ann ICRP 37(2–4)
• 8. James AC, Birchall A (1995) New ICRP lung dosimetry and its risk implications for alpha emitters. Radiat Prot Dosim 60;4:321–326
• 9. Maher EF, Laird NM (1985) Algorithm reconstruction of particle size distributions from diffusion battery data. J Aerosol Sci 16:557–570
• 10. Marple VA, Rubow KL (1986) Theory and design guidelines, cascade impactors: Sampling of data. Chapter 4. In: Lodge JP, Chan TL (eds) Cascade impactor: samplying and data analysis. American Industrial Hygiene Association, Akron, OH
• 11. Marsh JW, Harrison JD, Laurier D, Blanchardon E, Paquet F, Tirmarch M (2010) Dose conversion factors for radon: recent developments. Health Phys 99;4:511–516
• 12. Reineking A, Porstendorfer J (1990) “Unattached” fraction of short-lived Rn decay products in indoor and outdoor environments: an improved single-screen method and results. Health Phys 58;6:715–725
• 13. Solomon SB (1997) A radon progeny sampler for the determination of effective dose. Radiat Prot Dosim 72:31–42
• 14. Solomon SB (1999) Manual for Radon Progeny Particle Size Spectrometer (RPPSS) Mk2. ARPANSA, Yallambie, Australia
• 15. Solomon SB (2001) Field tests of a radon progeny sampler for the determination of effective dose. Sci Total Environ 272:303–313
• 16. Stather JW (2004) Dosimetric and epidemiological approaches to assessing radon doses – can the differences be reconciled. Radiat Prot Dosim 112;4:487–492
• 17. Twomey S (1975) Comparison of constrained linear inversion and iterative algorithm appllied to the indirect estimation of the particle size distribution. J Comput Phys 18:188–200
• 18. Wąsiołek PT, Hopke PK, James AC (1992) Assessment of exposure to radon decay products in realistic living conditions. J Exposure Anal Environ Epidemiol 2;3:309–322
• 19.Zock C, Porstendorfer J, Reineking A (1996) The influence of biological and aerosol parameters of inhaled short-lived radon decay products on human lung dose. Radiat Prot Dosim 63;3:197–206