Dose Coefficients for Intakes of Radionuclides by Members of the Public: Part 1

Abstract

This report is the first in a series of documents giving age-dependent dose coefficients for members of the public for environmental intakes of radionuclides by inhalation and ingestion. This series replaces the Publication 56 series of documents, update some data from Publication 119, and comes in addition to the series on occupational intakes of radionuclides by workers (OIR series). The revised dose coefficients have been calculated using the Publication 100 Human Alimentary Tract Model (HATM) and the Publication 130 revision of the Human Respiratory Tract Model (HRTM). Revisions have also been made to many of the models that describe the systemic biokinetics of radionuclides absorbed to blood, making them more physiologically realistic representations of uptake and retention in organs and tissues and of excretion. Changes have been implemented that were introduced in Publication 103 to: the radiation weighting factors used in the calculation of equivalent doses to tissues; the tissue weighting factors used in the calculation of effective dose; and the separate calculation of equivalent doses to males and females with sex-averaging in the calculation of effective dose. Reference anatomical computational phantoms such as those in Publication 110 and Publication 143 (i.e. models of the human body based on medical imaging data), have replaced many of the composite mathematical models used for previous calculations of organ doses. Dose calculations were also improved by using updated radionuclide data in Publication 107 and specific absorbed fraction data in Publication 133 and Publication 1XX.