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Updating the ICRP human respiratory tract model


Congress title : 6th Workshop on Internal Dosimetry of Radionuclides 
Congress location : Montpellier
Congress date :02/10/2006
Journal title : Radiation Protection Dosimetry 127 issue 1-4 Pages : 31-34

Document type > *Congrès/colloque

Keywords >

Research Unit > IRSN/DRPH/SRBE/LRTOX

Authors > ANSOBORLO Eric, BAILEY Mike, GUILMETTE Raymond, PAQUET François

Publication Date > 01/11/2007

Summary

The ICRP Task Group on Internal Dosimetry is developing new Occupational Intakes of Radionuclides (OIR) documents. Application of the Human Respiratory Tract Model (HRTM) requires a review of the lung-to-blood absorption characteristics of inhaled compounds of importance in radiological protection. Where appropriate, material-specific absorption parameter values will be given, and for other compounds, assignments to default Types will be made on current information. Publication of the OIR provides an opportunity for updating the HRTM in the light of experience and new information. The main possibilities under consideration relate to the two main clearance pathways. Recent studies provide important new data on rates of particle transport from the nasal passages, bronchial tree (slow phase) and alveolar region. The review of absorption rates provides a database of parameter values from which consideration can be given to deriving typical values for default Types F, M and S materials, and element-specific rapid dissolution rates.

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