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Titolo:
APPLICATION OF THE ICRP NEW RESPIRATORY-TRACT MODEL TO AN UNDERGROUNDURANIUM-MINE
Autore:
SOLOMON SB; OBRIEN RS; WILKS M; JAMES AC;
Indirizzi:
AUSTRALIAN RADIAT LAB,LOWER PLENTY RD YALLAMBIE VIC 3085 AUSTRALIA
Titolo Testata:
Radiation protection dosimetry
fascicolo: 1-4, volume: 53, anno: 1994,
pagine: 119 - 125
SICI:
0144-8420(1994)53:1-4<119:AOTINR>2.0.ZU;2-V
Fonte:
ISI
Lingua:
ENG
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
NO
Recensione:
Indirizzi per estratti:
Citazione:
S.B. Solomon et al., "APPLICATION OF THE ICRP NEW RESPIRATORY-TRACT MODEL TO AN UNDERGROUNDURANIUM-MINE", Radiation protection dosimetry, 53(1-4), 1994, pp. 119-125

Abstract

The ICRP's previous models of respiratory tract dosimetry for inhalation of radon progeny parameterised the effective dose in terms of the median size of aerosol particles with radon progeny attached to them, and the so-called unattached fraction of potential alpha energy. In principle, the new ICRP respiratory tract model allows the radiation dose to be derived as a continuous function of the radon progeny particlesize, over the complete size range from about 0.5 to 1000 nm. This paper compares the dose conversion factors derived by applying the old and new respiratory tract models to new size distribution data obtainedfrom an operational underground uranium mine. Methods for measuring the radon progeny activity-size distributions and unattached fractions within the mine are outlined, and the results are summarised. For eachrespiratory tract model, the exposure-dose conversion factors calculated from our measured radon progeny aerosol size distributions are compared with the values calculated for the 'reference' aerosol conditions assumed by the National Research Council to hold for the 1950s and 1960s uranium miners included in epidemiological studies. In general, the dose conversion factors derived for present-day mining were higher,by a factor of 1.2 to 2, reflecting marked local variations in the radon progeny aerosol size distribution. Both the old and new respiratory tract model predicted similar values for the ratio of exposure to dose conversion coefficients between a modem and an early uranium mine.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 01/10/20 alle ore 16:05:58