caa a22 4500 397502001 CHVBK 20180308164534.0 cr unu---uuuuu 161202e19950701xx s 000 0 eng 10.1093/oxfordjournals.rpd.a082734 doi 0144-8420 pii (NATIONALLICENCE)oxford-10.1093/oxfordjournals.rpd.a082734 New ICRP Lung Dosimetry and its Risk Implications for Alpha Emitters [Elektronische Daten] [A.C. James, A. Birchall (INVITED)] This paper follows on from Dr Bair's description of the new ICRP lung model, by illustrating its practical application to the calculation of dose coefficients for different forms of long-lived, alpha-emitting aerosols of plutonium and uranium. At the other end of the dosimetric spectrum, the dosimetry of the short-lived, alpha-emitting progeny of radon are examined. The conclusion is that, when applied to radon progeny exposures, the new ICRP lung dosimetry provides an opportunity to examine more critically the risk factors that are currently assumed for alpha radiation doses received by lung tissues. The results of large scale studies of lung cancer in uranium miners indicate that one Working Level Month (WLM) of exposure to radon progeny is equivalent in terms of lifetime lung cancer risk to approximately 5 mSv of effective dose. The currently recommended risk factors include the radiation weighting factor WRa), the total detriment per sievert at high dose rate (DEII), the dose and dose rate effectiveness factor (DDREF), and the lung-tissue weighting factor WTlung). However, consideration of the uncertainties involved in calculating the effective dose per unit exposure using the new lung model with the currently recommended risk factors shows that it is very unlikely to be as low as 5 mSv per WLM. The most likely estimate is threefold higher, about 15 mSv per WLM. Can this argument be used to provide a more realistic value of a composite risk weighting factor for all alpha emitters in the lungs? If so, the appropriate lung cancer risk factor, say O = WRaWTlung(DEII)/(DDREF) would be about 0.05 per Gy. The value published by Dr Bair in 1976 from his classic study in dogs was 0.06 per Gy! Radiation Protection Dosimetry James A.C. aut Birchall (INVITED) A. INVITED aut Radiation Protection Dosimetry Oxford University Press 60/4(1995-07-01), 321-326 0144-8420 60:4<321 1995 60 rpd https://doi.org/10.1093/oxfordjournals.rpd.a082734 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1093/oxfordjournals.rpd.a082734 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- James A.C. aut NATIONALLICENCE 700 1- Birchall (INVITED) A. INVITED aut NATIONALLICENCE 773 0- Radiation Protection Dosimetry Oxford University Press 60/4(1995-07-01), 321-326 0144-8420 60:4<321 1995 60 rpd Metadata rights reserved CC BY-NC-4.0 http://creativecommons.org/licenses/by-nc/4.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-oxford