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Standards GB are Chinese national standards, which are issued by China's Standardization Administration Office (SAC).
Chinese national standards are used all over China commonly labeled as GB standards. They determine the united production requirements regarding product safety and quality .
GB standards are often modified or created according to the international standards of ISO, IEC or any other international level.
Although, they are largely harmonized, GB standards may differ from international standards .
Approximately 15% of all GB standards are obligatory and they can be identified according to the prefix GB, after which the code of the standards follows:
GB – Obligatory national standards
GB/T – Optional national standards
GB/Z – National steering technical document
Nuclear criticality safety for fissile materials outside reactors - Part 1: Administrative practices for nuclear criticality safety
Standard published on 19.9.2008
Selected format:Nuclear criticality safety for fissile materials outside reactors--Safety requirements for the use of fixed neutron absorbers
Standard published on 24.10.2001
Selected format:Nuclear criticality safety for fissile materials outside reactor--Nuclear criticalitysafety based on limiting and controlling moderators
Standard published on 27.5.2004
Selected format:Nuclear criticality safety for fissile materials outside reactors—Part 12: Burnup credit for low water reactor( LWR) fuel
Standard published on 31.7.2017
Selected format:Nuclear criticality safety for fissile materials outside reactors - Part 2: Basic technical practices and subcritical limits for handling, processing and operations with fissile materials
Standard published on 19.9.2008
Selected format:Nuclear criticality safety for fissile materials outside reactors - Part 3: Requirements for nuclear criticality safety in the storage of fissile materials
Standard published on 19.9.2008
Selected format:Nuclear criticality safety for fissile materials outside reactor--Nuclear criticality safety criteria for steel-pipe intersections containing aqueous solutions of fissile material
Standard published on 7.7.1994
Selected format:Nuclear criticality safety for fissile materials outside reactor--Nuclearcriticality control criteria and subcritical limits for plutonium-natural uranium mixtures
Standard published on 7.7.1994
Selected format:Nuclear criticality safety for fissile materials outside reactor - Part 6: Borosilicate glass raschig rings and its application criteria
Standard published on 30.9.2009
Selected format:Nuclearcriticality safety for fissile materials outside reactor--Safety controls in conducting subcritical neutron multiplication measurements in situ
Standard published on 7.7.1994
Selected format:Latest update: 2026-04-24 (Number of items: 2 274 650)
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