GB5172-1985
The rule for radiation protection of particle accelerators
粒子加速器辐射防护规定
GB 5172-1985 is a current mandatory Chinese national standard for The rule for radiation protection of particle accelerators. It appears in the Medical compliance cluster with a product safety focus and has an implementation date of Jan 1, 1986.
Applicability depends on product scope, certification route, competent authority notices and transition rules. Requst for the translation or verify source before using this record in a compliance decision.
Compliance overview
Scope and applicability
This standard applies to particle accelerator facilities where the energy of accelerated particles is below 100MeV. It excludes medical accelerators and sealed neutron tubes or similar portable accelerators. Facilities must comply with these mandatory radiation protection rules.
Technical requirements
The standard specifies comprehensive dose equivalent limits for occupational workers and the public, including limits for external, internal, and combined exposures. It mandates the design of radiation shielding based on maximum radiation output, with a safety factor of 2. Facilities must implement radiation safety systems, including interlock devices, warning lights, and emergency stop switches. Accelerator facilities must have ventilation systems to exhaust toxic gases and airborne radioactive substances. The standard also outlines requirements for radiation safety management, environmental protection, and radioactive waste treatment, referencing GBJ 8-74 and IAEA Safety Series No. 9.
Testing methods
Testing involves personal dose monitoring for external and internal exposures, and area monitoring to classify zones into supervised and controlled areas. Surface contamination monitoring is required for areas using tritium targets or handling activated materials. Facilities must regularly calibrate radiation monitoring instruments at intervals not exceeding one year. Airborne radioactivity concentration monitoring is also mandated for relevant zones.
FAQs
What types of accelerators are covered under GB 5172-1985?
It covers particle accelerators with a single-nucleon energy below 100MeV, explicitly excluding medical accelerators and portable devices like sealed neutron tubes.
What are the dose limits for occupational workers under this standard?
The annual dose equivalent limit for occupational workers is 50mSv (5rem) for the whole body, while the limit for the public is 5mSv (0.5rem). Pregnant women and minors under 18 have stricter limits.
Does the standard address non-radiation hazards?
Yes, it includes supplementary guidelines on microwave radiation, ozone concentration limits, and general safety regarding flammable, explosive, and toxic substances.
The summary above provides a high-level overview of GB 5172-1985. To ensure complete compliance for your products entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 5172-1985 today to access all detailed parameters, tables, and testing procedures.
Applicability hints
- Type
- Safety
- CCS
- F70
- ICS
- 13.280
- Competent department
- Ministry of Ecology and Environment
- Technical committee
- Ministry of Ecology and Environment
Relationships
Replaced by:GB 5172-2025 (Upcoming)