GB11929-2011
Regulations for designing storage building of high level radioactive liquid waste
高水平放射性废液贮存厂房设计规定
GB 11929-2011 is a current mandatory Chinese national standard for Regulations for designing storage building of high level radioactive liquid waste. It appears in the Construction compliance cluster with a labeling & classification focus and has an implementation date of Dec 1, 2012.
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 specifies the technical requirements for the design of high level radioactive liquid waste storage buildings. It applies specifically to storage facilities designed for liquid waste generated from spent fuel reprocessing. It is mandatory for all manufacturers and engineering firms designing such nuclear facilities in China. The standard does not cover site selection criteria, as it emphasizes that the storage building must be constructed at the same site as the reprocessing plant.
Technical requirements
The standard outlines comprehensive design principles based on the defense-in-depth concept and the single failure criterion. It mandates strict zoning of radiation work areas into supervised zones (white zones) and controlled zones (green, orange, and red zones) to manage occupational exposure. Designers must ensure multiple barriers, including stainless steel liners and concrete vaults, are in place to prevent radioactive release. For the storage tanks, the standard requires the use of corrosion-resistant metallic materials and mandates 100% backup capacity for both the tanks and their internal cooling systems. Critical parameters such as temperature, liquid level, and hydrogen gas concentration must be monitored using redundant or diverse instrumentation. Tanks must be designed to keep hydrogen concentrations below 4.1% by volume and maintain temperatures below 60°C even during emergency cooling failures. The standard also integrates radioactive waste minimization principles, requiring systems to reduce secondary waste generation. Furthermore, it mandates comprehensive safety analysis and environmental impact assessments, requiring the preparation of a safety analysis report in accordance with EJ/T 681. Decommissioning considerations must be integrated into the initial design phase, ensuring smooth decontamination and dismantling.
Testing methods
The standard requires continuous monitoring and specific testing protocols rather than standalone laboratory tests. Key evaluations include 100% X-ray radiographic inspection of storage tank bottom and side welds, continuous monitoring of hydrogen gas concentration, and liquid level measurements using diverse redundancy. Facilities must also implement continuous monitoring of cooling water for radioactive contamination and periodic sampling of groundwater via detection wells. Radiation monitoring involves fixed gamma dose rate monitors and aerosol sampling systems to detect any tank leakage.
FAQs
What products and facilities are regulated under GB 11929-2011?
It applies to the design of storage buildings for high level radioactive liquid waste generated from spent fuel reprocessing. It is mandatory for all such new facility designs in China.
Are there any significant updates from the previous version of GB 11929?
The 2011 version replaces GB 11929-1989. Key updates include the addition of safety classification requirements, ventilation system design criteria, radioactive waste minimization principles, and specific decommissioning considerations based on EJ 588.
How does GB 11929-2011 differ from general international ISO standards?
It aligns with Chinese nuclear safety standards like GB 18871 and EJ 849, emphasizing defense-in-depth, single failure criteria, and ALARA principles. However, it provides specific architectural and system mandates tailored for high level radioactive liquid waste storage rather than general international formats.
The summary above provides a high-level overview of GB 11929-2011. To ensure complete compliance for your nuclear facilities entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 11929-2011 today to access all detailed parameters, tables, and testing procedures.
Applicability hints
- Type
- Other
- CCS
- F49
- ICS
- 27.120
- Competent department
- Ministry of Ecology and Environment
- Technical committee
- Ministry of Ecology and Environment
Relationships
Replaces:GB 11929-1989