GB/T 24246-2026Radiation protection instrumentation - Installed radiation portal monitors (RPMs) for the detection of illicit trafficking of radioactive and nuclear materials (English PDF)

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents".

Drafting.

Aside from structural adjustments and editorial changes, the main technical changes are as follows.

a) The terminology has been changed, and abbreviations and symbols, quantities and units have been added (see Chapter 3, Chapter 3 of the 2009 edition);

b) The classification, detection area, test points, and evaluation distance of the monitoring system were changed, as well as the radioactive sources used in the testing of large vehicles and railway vehicles.

By speed (see 4.1, 5.2.3 and 5.2.4 in the 2009 edition);

c) Added communication interface, data, statistical fluctuation, functional testing, background impact, climate and environmental exposure type testing, power supply voltage and frequency.

Rate fluctuations, documents (see 4.5, 4.6, 5.1, 5.3, 6.2, 7.5, 9.6, and Chapter 11);

d) The ambient background electrons in the standard test conditions were increased (see Table 3);

e) The relative humidity, atmospheric pressure, and ambient gamma background of the standard test conditions were modified (see Table 3, Table 9 of the 2009 edition);

f) Reference conditions were removed, including power supply voltage, power supply frequency, power supply waveform, external electromagnetic field, and external [other parameters] from the standard test conditions.

Magnetic induction (see Table 9 in the 2009 edition);

g) Sensitivity consistency, static detection efficiency, radiation compatibility, cryogenic storage, high-temperature storage, electrical safety, and transportation environment have been removed.

Adaptability, marking, packaging, transport and storage (see 5.5.2, 5.5.3, 5.3, 6.6.2, 6.6.3, 6.9.2, 5.8.2, 2009 edition).

6.9.3, Chapter 8);

h) Performance requirements, test methods, and test sources have been changed (see Chapter 6, 5.5 of the 2009 edition);

i) Changed climatic environmental requirements, mechanical environmental requirements for vibration, shock and flutter, electromagnetic compatibility requirements for electrostatic discharge and radio frequency immunity.

Radio frequency conducted immunity, surge and ringing (see Chapters 7, 8, and 9; 5.8.1, 5.8.3, and 5.7 in the 2009 edition).

6.9.2, 6.9.4, 6.8).

This document is modified to adopt IEC 62244:2019 "Radiation protection instruments for detecting illicit transport of radioactive and nuclear materials - Fixed radiation gates".

Household Monitoring System (RPMS).

---Table 1 corresponds to Table 2 in IEC 62244:2019;

---Table 2 corresponds to Table 3 in IEC 62244:2019;

---Table 3 corresponds to Table 4 in IEC 62244:2019;

---Table 4 corresponds to Table 5 in IEC 62244:2019;

---Table A.1 corresponds to Table 6 in IEC 62244:2019;

---Table B.1 corresponds to Table 7 in IEC 62244:2019.

The technical differences between this document and IEC 62244:2019, and the reasons therefor, are as follows.

a) Using normatively referenced GB/T 2423.17, GB/T 2423.24, GB/T 2900.97, GB/T 16511, GB/T 31836, GB/T 34138 replaces IEC 60068-2-11, IEC 60068-2-5, IEC 60050-395, and IEC 61187, respectively.

IEC 62484 and IEC 62706 provide operability;

b) Normative references GB/T 2423.5, GB/T 2423.55, GB/T 17799.2, and GB 17799.4 have been added, corresponding to this document.

The test items and definitions added to the document;

c) The definition of "nuclear material" has been changed (see 3.1.4) to align with Chinese laws and regulations;

d) Three test points were added on each side of the center of the detection area in Figure 1 and Table 1 (a total of six test points were added), clarifying the location of the six points.

To more comprehensively detect the detection area, modifications were made to sections 6.3 and 6.4 accordingly.

e) The ambient temperature range in the standard test conditions has been changed (see Table 3), from 18°C~25°C to 15°C~35°C, which is easier to implement.

Test environment;

f) The representation of the gamma-ray source activity range has been changed (see 5.4.1), replacing the relative deviation representation "(-0%, 20%)" with a more specific expression.

The range of body activity values is more intuitive and clear;

h) Changes were made to "gamma radiation detection" and "neutron radiation detection (if applicable)" (see 6.3, 6.4), as well as Figure 1 and Table 2, and six experiments were added.

The location of the six points is clearly defined to more comprehensively detect the detection area and improve operability;

i) The statement in "General Requirements" (see 7.1) that "Monitoring systems designed for controlled environments (such as indoors) do not need to be designed for climatic conditions" has been removed.

The term "test" is related to clause 7.2.1, which states that "for systems designed for use in climate-protected locations, the 'fixed' and 'climate-protected' types should be applicable." the statement regarding the "temperature range" of controlled environmental environments is contradictory.

j) The test method for "Ambient Temperature" (see 7.2) has been changed, eliminating the 2-hour constant temperature test at each temperature point, and the test can be performed at the extreme temperature.

Verify temperature and environmental adaptability;

k) The test method for "impact (flutter)" (see 8.2) has been modified, and the test apparatus and test method must meet GB/T 2423.55.

The requirements for testing Eha, Ehb, or Ehc are more practical;

l) An impact test has been added (see 8.3) to monitor the potential impact environment at the monitoring system's workplace;

m) The requirement for "radiated emission" (see 9.3) has been changed in accordance with the requirements of GB 17799.4, based on the requirements for radiated emission in GB/T 34138.

The reference system is not explicitly stated, but it has been confirmed that it refers to the requirements of the North American FCC certification directives, which differ from the IEC system.

n) Added standard industrial environment electromagnetic compatibility requirements for "power frequency magnetic fields" (see 9.7), "voltage sags and interruptions" (see 9.8), and "fast..." "Transient" (see 9.9) and "conductive emission" (see 9.10) are more operable;

o) An "Inspection Rules" (see Chapter 10) has been added to guide manufacturers in implementing the standard.

The following editorial changes have been made to this document.

---Appendix A (informative) and Appendix B (informative) have been added.

This document was proposed and is under the jurisdiction of the National Technical Committee on Standardization of Nuclear Instruments and Meters (SAC/TC30).

1 Scope

This document specifies the general characteristics and requirements, general test procedures, and radiation detection of gate-type monitoring systems used for detecting gamma rays and neutrons.

Requirements, climate requirements, mechanical environment requirements, electrical and electromagnetic compatibility requirements, inspection rules and document requirements.

Note 1.This type of monitoring system is usually called a gantry radiation monitoring system (hereinafter referred to as "monitoring system"), and is mainly used to monitor vehicles, cargo containers, personnel, or transmission sources.

Monitoring of transported luggage and parcels is typically deployed at national and international border crossings, and also in any location where such monitoring is required.

Note 2.Appendix A lists the performance requirements summary, and Appendix B summarizes the environmental requirements.

This document applies to gantry monitoring systems other than those specified in GB/T 31836 for spectral analysis.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.

For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.

This document.

GB/T 2423.5 Environmental testing – Part 2: Test methods – Test Ea and guidelines. Impact GB/T 2423.17 Environmental Testing – Part 2: Test Methods – Test Ka. Salt Spray (GB/T 2423.17-2024) GB/T 2423.24 Environmental testing – Part 2: Test methods – Test S. Simulated solar radiation on the ground and solar radiation tests and the guidelines for climate aging tests (GB/T 2423.24-2022, IEC 60068-2-5:2018, IDT) GB/T 2423.55 Environmental testing – Part 2: Test methods – Test Eh. Hammer impact test GB/T 2900.97 Electrical Engineering Terminology - Nuclear Instruments. Physical Phenomena, Basic Concepts, Instruments, Systems, Equipment and Detectors (GB/T 2900.97-2016, IEC 60050-395:2014, IDT) GB/T 16511 Accompanying documentation for electrical and electronic measuring equipment (GB/T 16511-1996, IEC 61187:1993, IDT) GB/T 17799.2 General standards for electromagnetic compatibility – Part 2: Immunity standards in industrial environments GB 17799.4 General Standard for Electromagnetic Compatibility - Part 4: Emissions in Industrial Environments GB/T 31836 Radiation protection instruments for detecting and identifying illicit radioactive material transport - Spectral analysis-based gate monitoring system Standard (GB/T 31836-2015, IEC 62484:2010, IDT) GB/T 34138 Environmental, electromagnetic and mechanical performance requirements and test methods for radiation protection instruments (GB/T 34138-2025) IEC 62706:2019, MOD) IEC 62755 Radiation protection instruments - Data format for radiation measuring instruments used to detect illicit trafficking of radioactive materials (Radiation)

3 Terms and definitions, abbreviations and symbols, quantities and units