GBZ 114-2002 Standard for Health Protection of Sealed Radioactive Sources GBZ114-2002 Standard download decompression password: www.bzxz.net

Ics13.100
National occupational health standard of the People's Republic of China GBZ114-2002
Health protection standard for using sealed radioactive sources
Radiological protection standardsfor using sealed radioactive sources2002-04-08 Issued
Ministry of Health of the People's Republic of China
2002-06-01 Implementation
1 Scope
Normative references
3 Terms and definitions
Protection requirements for sealed sources
Requirements for protective containers
Storage of sealed sources
Transport of sealed sources
3 Operation requirements
This standard is formulated in accordance with the Law of the People's Republic of China on the Prevention and Treatment of Occupational Diseases. If there is any inconsistency between the original standard GB16354-1996 and this standard, this standard shall prevail.
Chapters 4 to 8 of this standard are mandatory contents, and the rest are recommended contents. This standard is proposed and managed by the Ministry of Health. www.bzxz.net
The drafting unit of this standard: Shanghai Institute of Radiological Medicine. The main drafter of this standard: Qian Zhilin.
This standard is interpreted by the Ministry of Health.
1 Scope
Standard for health protection when using sealed radioactive sources
GBZ114-2002
This standard specifies the general requirements for radiation health protection when using sealed radioactive sources (hereinafter referred to as sealed sources).
This standard applies to sealed sources of 3.7×104~3.7×10l2Bg (μCi~hCi). This standard does not apply to instrument calibration sources, medical sealed sources and sealed sources encapsulated in glass containers: This standard also does not apply to neutron sealed sources.
2 Normative references
The clauses in the following documents become the clauses of this standard through reference in this standard. For any dated referenced document, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, parties reaching an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For any undated referenced document, the latest version shall apply to this standard. GB4075 Classification of sealed radioactive sources
GB4076 General provisions for sealed radioactive sources
GB11806 Regulations for safe transportation of radioactive materials 3 Terms and definitions
The following terms and definitions apply to this standard. 3.1 Sealed (radioactive) source sealedradioactivesources A radioactive source sealed in a shell or a tight covering layer, which has sufficient strength to prevent radioactive material from leaking out under the designed use conditions and normal wear. 3.2 Protective container protectivecontainen Any container that can shield (or weaken) the radiation of a sealed source so that the leakage radiation level outside the container meets the corresponding standards. According to their different functions, protective containers can be divided into storage containers, transport containers and working containers.
4 Requirements for the protection of sealed sources
4.1 Sealed sources must comply with the requirements of GB4075 and GB4076. 4.2 Before a sealed source leaves the factory or is recovered after being stolen, an activity test, a leak test and a surface radioactive contamination test should be conducted.
4.3 The certificate of inspection of sealed sources, the arrival registration, and the relevant information such as the issuance and transfer of certificates should be kept for a long time together with the sealed source and checked regularly.
5 Requirements for protective containers
5.1 Storage containers and transport containers must be convenient for taking and placing sealed sources. 5.2 Transport containers should be easy to carry and should be equipped with markers such as "lead seals" to prove that they have not been opened.
5.3 The working container should be marked with the number, model, name of the nuclide, activity, radiation type, manufacturer, date of manufacture and a conspicuous "ionizing radiation" mark. 5.4 When the sealed source is in the storage position, the corresponding dose equivalent rate limit near the working container should be determined according to different use conditions and environments to ensure that the exposure dose of the surrounding personnel does not exceed the corresponding annual dose limit requirements.
5.5 The working container must be equipped with a source position indicator to clearly show that the sealed source is in the storage position or working position.
5.6 The working container must be equipped with a special structure to prevent the sealed source from falling off or being opened by unrelated personnel. 6 Sealed Source Storage
6.1 According to the type, quantity and total activity of the sealed source, safe and reliable storage rooms, storage cabinets, storage boxes and other corresponding special storage equipment should be designed respectively. 6.2 The storage room must meet the requirements of protective shielding design to ensure the safety of the surrounding environment. The storage room should be managed by a dedicated person.
6.3 Some storage rooms must build storage pits. The protection facilities of the storage pits should be determined according to the maximum design capacity of the sealed source. The storage pits should be kept dry. 6.4 The storage room should be equipped with a conspicuous "ionizing radiation" sign, and unrelated personnel are strictly prohibited from entering. 6.5 The storage room should have enough usable area to facilitate the storage and access of sealed sources; and good ventilation and lighting should be maintained.
6.6 The storage room, storage cabinets, boxes, etc. should have fire prevention, waterproofing, explosion prevention, corrosion prevention and anti-theft safety facilities.
Sealed source transportation
The transportation of sealed sources should comply with the provisions of GB11806 on the safe transportation of radioactive materials. 7.2
The vehicles transporting sealed sources shall not be mixed with flammable, explosive and other dangerous goods. 7.3
The vehicles transporting sealed sources must have safety facilities to prevent the sealed sources from being lost, overturned, scattered or stolen.
7.4 After the sealed sources arrive, the user department must monitor the radiation level and dose rate of the surface contamination of the packaging boxes and check whether the test results are consistent with the product certificate provided by the supplier. 8 Operation requirements
8.1 Before taking up their posts, operators and managers of sealed sources must receive occupational health training on radiation protection, master certain safety protection knowledge and skills, and pass the assessment. 8.2 Operators should take various effective occupational disease hazard protection measures based on the number and activity of sealed sources, in accordance with the principle of radiation protection optimization, and fully consider factors such as time, distance, and shielding facilities to control the exposure dose to the lowest level that can be reasonably achieved. 8.3 Employers should have preventive and emergency rescue measures for possible sealed source accidents. 8.4
When operating sealed sources, appropriate tools and shielding facilities should be used according to their type and activity. 8.5
When replacing the container of a sealed source, professional protection personnel should be responsible for on-site operation dose monitoring. 8.6
When operating a sealed source device in the field, a certain range of control areas should be provided in the direction of the useful beam projection.
8.7 The employer shall inspect the protective performance of sealed source equipment and safety facilities at least once a year. If contamination or leakage is found, measures must be taken immediately, and the inspection results must be recorded in detail and properly kept and filed.
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