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Titolo:
Field tests of a radon progeny sampler for the determination of effective dose
Autore:
Solomon, SB;
Indirizzi:
Australian Radiat Protect & Nucl Safety Agcy, Yallambie, Vic 3085, Australia Australian Radiat Protect & Nucl Safety Agcy Yallambie Vic Australia 3085
Titolo Testata:
SCIENCE OF THE TOTAL ENVIRONMENT
fascicolo: 1-3, volume: 272, anno: 2001,
pagine: 303 - 313
SICI:
0048-9697(20010514)272:1-3<303:FTOARP>2.0.ZU;2-E
Fonte:
ISI
Lingua:
ENG
Soggetto:
PARTICLE-SIZE DISTRIBUTIONS; DIFFUSION BATTERY;
Keywords:
radon; radon progeny; activity size distributions; unattached fractions; ICRP respiratory tract model; dose conversion; factors; show caves; Effective Dosimeter;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
17
Recensione:
Indirizzi per estratti:
Indirizzo: Solomon, SB Australian Radiat Protect & Nucl Safety Agcy, Lower Plenty Rd,Yallambie, Vic 3085, Australia Australian Radiat Protect & Nucl Safety Agcy Lower Plenty Rd Yallambie Vic Australia 3085
Citazione:
S.B. Solomon, "Field tests of a radon progeny sampler for the determination of effective dose", SCI TOTAL E, 272(1-3), 2001, pp. 303-313

Abstract

A two-screen sampler tan effective dosimeter), with a collection efficiency matched to the particle size response of the radon progeny dose conversion factors (DCF), obtained from the ICRP respiratory tract model as implemented in the computer code RADEP, has been developed to assess the inhalationdose from exposure to radon progeny. In order to evaluate the performance of this sampler, the second stage of a six-stage wire screen diffusion battery was designed to operate as an Effective Dosimeter. This hybrid system allowed two methods for the determination of the radon progeny DCF. For the first method, the activity size distributions, measured using the diffusionbattery, were used to obtain a size-weighted DCF. A second determination of DCF was obtained directly from the fraction collected by the Effective Dosimeter. The hybrid diffusion battery was used to measure radon progeny in the Fairy Cave, Buchan, Victoria at 20-min intervals over a 30-h period. This cave had radon concentrations exceeding 2000 Bq m(-3), with low aerosol concentration and low ventilation rates. The measurements were analysed forthe radon progeny PAEC, the activity size distribution, the size-weighted DCF and the effective dosimeter collected fraction. The Effective DosimeterDCFs were determined from the collected fraction using firstly a simple linear function and then using a more complex polynomial function to correct for residual errors. For the linear factor alone, the calculated Effective Dosimeter DCFs were on average 11% lower than the equivalent size-weighted DCF values. The agreement using the polynomial function was improved markedly, with a linear regression of the DCF yielding a fitted ratio of 0.965, with an R value of 0.99. For this study, the use of the ICRP conversion convention to estimate the occupational exposure to the tour guides working in the Fairy Cave would under estimate the effective dose by up to a factor of2. Crown Copyright (C) 2001 Published by Elsevier Science B.V.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 01/10/20 alle ore 16:10:00