GB/Z 115-2025 (GBZ115-2023) PDF English
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GBZ115-2023: Standard for radiological protection in low-energy radiation generating devices
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GBZ115-2023: Standard for radiological protection in low-energy radiation generating devices
Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure
Status: Valid
GBZ115: Historical versions
| Standard ID | USD | BUY PDF | Delivery | Standard Title (Description) | Status |
| GB/Z 115-2025 | RFQ | ASK | 3 days | (Gears - Calculation of load capacity of worm gears) | |
| GBZ 115-2023 | 125 | Add to Cart | Auto, 9 seconds. | Standard for radiological protection in low-energy radiation generating devices | Valid |
| GBZ 115-2002 | 135 | Add to Cart | Auto, 9 seconds. | Radiological standards for X-ray Diffraction and fluorescence analysis equipment | Obsolete |
GBZ115-2023: Standard for radiological protection in low-energy radiation generating devices
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBZ115-2023GBZ NATIONAL OCCUPATIONAL HEALTH STANDARD ICS 13.100 CCS C 57 Replacing GBZ 115-2002 Standard for radiological protection in low-energy radiation generating devices Issued on: MARCH 07, 2023 Implemented on: MARCH 01, 2024 Issued by. National Health Commission of the People's Republic of China
Table of Contents
Foreword... 3 1 Scope... 5 2 Normative references... 5 3 Terms and definitions... 5 4 General... 7 5 Protective facilities requirements... 7 6 Safety operation requirements... 10 7 Radiation safety inspection requirements... 10 8 Testing requirements for radiation protection... 11 9 Radiation protection training requirements... 12 Bibliography... 14 Standard for radiological protection in low-energy radiation generating devices1 Scope
This Standard specifies the radiation protection requirements for non-medical low- energy radiation generating devices. This Standard applies to X-ray diffractometers, X-ray fluorescence analyzers, ion implantation equipment, electron beam welders, static eliminators, electron microscopes, and X-ray devices used for thickness measurement, weighing, aperture measurement, and density measurement, with energies ranging from the exemption value to 1 MeV. This Standard does not apply to industrial X-ray flaw detection, industrial X-ray CT flaw detection, and X-ray baggage inspection systems.2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB 18871, Basic standards for protection against ionizing radiation and for the safety of radiation sources GBZ 98, Health standards for radiation workers GBZ 128, Specifications of individual monitoring for occupational external exposure3 Terms and definitions
For the purposes of this Standard, the following terms and definitions apply. 3.1 low-energy radiation generating devices A device that can generate X-rays, electron beams, and ion beams with energies ranging from the exemption value to 1MeV when powered on. Example. X-ray diffractometers, X-ray fluorescence analyzers, ion implantation4 General
4.1 Production and use units shall be responsible for the protection and safety of workers and the public during the installation, commissioning and use of radiation devices. 4.2 Practices involving low-energy radiation generating devices shall comply with the requirements specified in GB 18871.Ensure the legitimacy of the practice. Optimize radiation protection and strictly implement personal dose limit regulations. 4.3 Producer and user shall set up or designate a radiation protection management agency. Equip it with full-time or part-time radiation protection management personnel to be responsible for the radiation protection work of the organization. 4.4 Producer and user shall provide pre-employment and on-the-job radiation protection training to their staff and maintain radiation protection training records. Staff may only begin work after passing the training. If changes in processes, technologies, equipment, or materials result in changes to major radiation hazards, producer and user shall re- train their staff in radiation protection before they begin their work. 4.5 Producer and user shall conduct occupational health monitoring of radiation workers in accordance with GBZ 98.They shall also conduct external radiation personal dose monitoring in accordance with GBZ 128.Health monitoring files and personal dose files shall be established.5 Protective facilities requirements
5.1 Radiation shielding requirements for radiation devices 5.1.1 For low-energy radiation generating devices with X-ray tubes and shutters, the X- ray tube housing shall be constructed to ensure that when all shutters are closed, the ambient dose equivalent rate at a distance of 5 cm from the outer surface of the X-ray tube housing is not greater than 25 μSv/h in any rated operating state. 5.1.2 The ambient dose equivalent rate at 5 cm from the outer surface of the protective cabinet of the radiation generating device or high-voltage power supply shall not exceed 2.5 μSv/h. 5.1.3 When a closed-beam device is in normal use, the ambient dose equivalent rate at a distance of 5 cm from any accessible outer surface of the casing shall not exceed 2.5 μSv/h. 5.2 Radiation levels in the workplace 5.2.1 Opened-beam devices may only be used in specific radiation workplaces. They 5.8.2 When an opened-beam device encounters any of the following overload conditions, it shall be able to automatically cut off the high voltage. a) When the high voltage exceeds the rated value; b) When the current exceeds the rated value; c) When the set power is exceeded.6 Safety operation requirements
6.1 When the device is not in use, the beam outlet shall be closed. 6.2 When operating radiation devices, the characteristics of the radiation field shall be analyzed and effective protective measures shall be taken, with particular attention paid to preventing localized radiation such as hands and head. 6.3 The sample shall be replaced without any bundle loss. 6.4 When disassembling or installing the X-ray tube housing and other exposed components, the shutter shall be closed and the high voltage of the X-ray tube shall be cut off. 6.5 The exposed components of the original radiation device and their assembly structure and assembly position shall not be changed without authorization. 6.6 When calibrating or debugging X-ray devices, low voltage and current shall be used when using primary radiation. Personnel shall avoid strong X-ray beams and implement local shielding measures. Never debug X-ray devices with the X-ray tube exposed. 6.7 When operating a handheld radiation device, do not aim the primary radiation at yourself or anyone else. Do not hold the sample in your hand. Do not get close to the useful radiation beam.7 Radiation safety inspection requirements
7.1 Inspection cycle Users shall develop an inspection plan and conduct regular inspections of safety devices independently. The inspection cycle shall not exceed 6 months. 7.2 Inspection contents of safety devices 7.2.1 The inspection shall include all safety devices, including interlocks, shutters, warning lights, emergency stop switches, etc. 7.2.2 If any fault is found during inspection, the radiation device shall be stopped and not used until the safety device is completely repaired and with written approval. 7.2.3 The user shall keep records of each inspection. The records shall at least include the inspection date, a list of safety devices inspected, information on the inspection instruments and their calibration date, inspection results, and the name of the person who performed the inspection.8 Testing requirements for radiation protection
8.1 Testing plan 8.1.1 The user shall develop a plan for testing the protection performance of the radiation device. A qualified organization shall be commissioned to conduct regular testing of the protection performance of the radiation device. The regular testing cycle shall be one year. 8.1.2 Safety device inspection and radiation protection performance testing shall be carried out in any of the following situations. a) When the exposed components of the original radiation device are modified, or when their assembly structure or assembly location is changed; b) When the primary radiation of the radiation device is calibrated or adjusted; c) When the shielding and protective equipment of the radiation device is modified or damaged. 8.2 Testing methods 8.2.1 The test shall be carried out under the conditions of the commonly used maximum irradiation range and the commonly used maximum tube voltage and tube current combination. 8.2.2 Protective performance testing instruments shall be selected that meet the radiation field characteristics of the radiation device. The instrument shall have a valid legal metrological verification or calibration certificate. The instrument shall also meet other special workplace requirements, such as explosion protection or radio frequency shielding. 8.2.3 Conduct radiation level inspections around radiation devices to identify areas with potentially high radiation levels. When inspecting, pay attention to the following. a) The inspection range shall be determined based on the design features of the radiation device and its shielding, the radiation direction, and potential problems. b) For radiation devices without a fixed radiation direction, radiation levels shall be ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
