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GB/T 44632-2024 English PDF

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GB/T 44632-2024: Reference radiation fields for radiation protection - Definitions and fundamental concepts
Status: Valid

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
GB/T 44632-2024	English	674	Add to Cart	5 days [Need to translate]	Reference radiation fields for radiation protection - Definitions and fundamental concepts	Valid	GB/T 44632-2024

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Basic data

Standard ID	GB/T 44632-2024 (GB/T44632-2024)
Description (Translated English)	Reference radiation fields for radiation protection - Definitions and fundamental concepts
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	F85
Classification of International Standard	13.280
Word Count Estimation	34,357
Date of Issue	2024-09-29
Date of Implementation	2025-10-01
Issuing agency(ies)	State Administration for Market Regulation, China National Standardization Administration

GB/T 44632-2024: Reference radiation fields for radiation protection - Definitions and fundamental concepts

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 13.280 CCSF85 National Standard of the People's Republic of China Definition and basic concepts of reference radiation fields for radiation protection (ISO 29661.2012, IDT) Released on 2024-09-29 2025-10-01 Implementation State Administration for Market Regulation The National Standardization Administration issued

Preface III 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 3.1 General 1 3.2 Quantities and conversion factors 6 4 Symbol 10 5 Application of measurement quantities and units 13 5.1 Measurement quantities for site monitoring 13 5.2 Quantities for personal monitoring 13 5.3 Determination of measurement quantities for site and individual monitoring 13 6 Calibration and determination of response in the reference radiation field 13 6.1 General Principles13 6.1.1 Parts to be irradiated 13 6.1.2 Test conditions for dose (rate) meters 14 6.1.3 Determination of inspection points and reference points 14 6.1.4 Determination of the axis of rotation 14 6.1.5 Reference conditions and standard test conditions for influencing quantities 14 6.2 Calibration in the reference radiation field 14 6.2.1 Calibration process 14 6.2.2 Using secondary standards or working measurement standards to determine agreed quantities14 6.2.3 Determination of correction indication and calibration factor 15 6.2.4 Determination of measured values 15 6.3 Determination of the reference radiation field response 16 6.4 Determination of calibration coefficients 16 6.4.1 Procedure 16 6.4.2 Sequential irradiation standards and dose (rate) meters 16 6.4.3 Simultaneous irradiation standards and dose (rate) meters 17 6.4.4 Calibration and determination of response using calibrated monitoring devices 18 6.4.5 Calibration and determination of response using reference radiation sources 18 6.5 Special requirements for site dose (rate) meters (site inspection meters) 19 6.5.1 Reference point and reference direction 19 6.5.2 Irradiation conditions 19 6.6 Special requirements for personal dosimeters 19 6.6.1 Overview 19 6.6.2 Phantom 20 6.6.3 Reference direction and reference point 20 6.6.4 Irradiation conditions 21 6.6.5 Simultaneous exposure of multiple dosimeters 21 7 Uncertainty 22 8 Certificate 22 Appendix A (Normative) Reference conditions and standard test conditions list 23 Appendix B (Normative) Calibration Factor Description 24 Reference 25

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents" Drafting. This document is equivalent to ISO 29661.2012 "Definitions and basic concepts of reference radiation fields for radiation protection". The following minimal editorial changes were made to this document. --- The outer margins of clauses involved in the contents of ISO 29661.2012/Amd.1.2015 are marked with double vertical lines (‖) Marked; --- Corrected the errors in the original text and modified the units of the symbols d, E and hΦ (see Chapter 4); ---Added personal doses for different types of radiation (photons, beta and neutrons) under different conditions such as measurement, calibration and type testing Description of the reference point for calculation (see 6.6.3). Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document was proposed and coordinated by the National Nuclear Energy Standardization Technical Committee (SAC/TC58). This document was drafted by. China Institute of Metrology, China Institute of Radiation Protection, China Institute of Atomic Energy, Tsinghua University, Academy of Military Science Chemical Defense Research Institute and Nuclear Industry Standardization Institute. The main drafters of this document are. Li Dehong, Wei Yingjing, Yang Zhijun, Wei Kexin, Zhang Xiaole, Huang Jianwei, Liu Chuanfeng, Xu Yilun, Qiu Rui, Zhang Xuan, Zhao Rui, Zhang Jian, Song Mingzhe, Gao Fei, Sun Tao, Liu Haixia, Chen Zijia. Definition and basic concepts of reference radiation fields for radiation protection

1 Scope

This document defines terminology related to the calibration of dosimeters and equipment used for dose measurement of external radiation, particularly beta, neutron and photon radiation. The basic concepts and measurements of radiation protection dosimeters and dose (rate) meters are clarified. For personal dose monitoring, including torso (whole body) dose For site dose monitoring, it includes portable and fixed dose (rate) meters. This document specifies the calibration requirements, calibration process, and calibration procedures for dosimeters and dose (rate) meters used for personal and site dose monitoring in reference radiation fields. The requirements for the reference points and phantom placement of personal dosimeters during the process, as well as the methods for determining the energy response and angular response, are discussed. This document is intended for reference by calibration laboratories and manufacturers.

2 Normative references

The contents of the following documents constitute essential clauses of this document through normative references in this document. For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to This document. GB/T 27025-2019 General requirements for testing and calibration laboratories (ISO /IEC 17025.2017, IDT) ISO /IEC Guide 98-3 Uncertainty of measurement Part 3.Guide to the expression of uncertainty in measurement Note. GB/T 27418-2017 Evaluation and Expression of Uncertainty in Measurement (ISO /IEC Guide 98-3..2008, MOD)

3 Terms and definitions

The following terms and definitions apply to this document. 3.1 General 3.1.1 In the coordinate system of the dose (rate) meter, the angle between the incident direction of radiation in the azimuth field and the reference direction of the dose (rate) meter. 3.1.2 Areadose meter Area Survey Meter An instrument used to measure ambient dose equivalent (rate) or directional dose equivalent (rate). 3.1.3 Background indication An indication obtained from a phenomenon, object or substance similar to the one being studied, but in which the quantity of interest is not represented or does not contribute to the result. 3.1.4 Calibration A set of operations under specified conditions, the first step of which is to determine the relationship between the value provided by the measurement standard and the corresponding indication.

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