Standard No.:	GB/T 16148-2026
English Name:	Method of estimation for intake and internal dose of radionuclides
Chinese Name:	放射性核素摄入量及内照射剂量估算方法
Professional Classification:	GB    National Standard
Source Content Issued by:	SAMR, SAC
Issued on:	2026-05-22
Implemented on:	2026-12-1
Status:	to be valid
Superseding:	GB/T 16148-2009 Specification for assessments of intakes and internal doses of radionuclides
Target Language:	English
File Format:	PDF
Word Count:	22000 words
Translation Price(USD):	660.0
Delivery:	via email in 1~8 business day

GB/T 16148-2026 Method of estimation for intake and internal dose of radionuclides English, Anglais, Englisch, Inglés, えいご This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered. ICS CCS National Standard of the People's Republic of China ‌GB/T 16148-2026 Method of estimation for intake and internal dose of radionuclides 放射性核素摄入量及内照射剂量估算方法 Issue date: 2026-02-27 Implementation date: 2027-03-01 Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China the Standardization Administration of the People's Republic of China Contents Foreword 1 Scope 2 Normative references 3 Terms and definitions 4 Intake pathways and modes 5 Estimation of radionuclide intake 6 Estimation of internal dose and methods 7 Uncertainties in the estimation of radionuclide intake and internal dose Annex A (informative) Models used for estimating radionuclide intake and internal dose Annex B (informative) Logic diagrams of methods for estimating intake and internal dose Annex C (informative) Effective dose coefficients for ingestion of radionuclides by members of the public Annex D (informative) Effective dose coefficients for inhalation of radionuclides by members of the public Annex E (informative) Effective dose coefficients for inhalation of soluble or reactive gases and vapours by members of the public Annex F (informative) z(t) for selected radionuclides of major concern Annex G (informative) Uncertainties in the estimation of radionuclide intake and internal dose Bibliography Methods for estimating radionuclide intake and internal dose 1 Scope This document describes the methods for estimating radionuclide intake and internal dose. This document is applicable to the estimation of radionuclide intake and internal dose for occupational exposure and public exposure. 2 Normative references This document has no normative references. 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 intake The activity of a radionuclide that enters the body over a given period or as a result of a specific event. 3.2 direct measurement Measurement methods for monitoring the content of radioactive material in the whole body or in organs and tissues. Note: Whole-body monitoring or local in-vivo monitoring. It is mainly used for radionuclides that emit characteristic X-rays, gamma rays, positrons and high-energy beta particles, and also for some alpha emitters that emit characteristic X-rays. 3.3 indirect measurement Measurement methods for monitoring the content of radioactive material in human excreta and other biological samples. Note: It is mainly used for radionuclides that do not emit gamma rays or emit only low-energy photons, as well as radionuclides emitting high-energy beta and gamma rays. 3.4 activity median aerodynamic diameter (AMAD) The diameter of a unit-density spherical particle such that the activity of particles greater than or less than this diameter each account for 50 % of the total activity of the measured particles, under the condition of the same terminal settling velocity in air. 4 Intake pathways and modes 4.1 The models of radionuclide intake, transfer and excretion pathways are given in A.1 of Annex A. 4.2 The description of the human respiratory tract model is given in A.2. 4.3 The description of the human digestive tract model is given in A.3. 4.4 The description of intake through wounds and intact skin is given in A.4.