GB/T 13375-2017 in English
VALIDNatural uranium hexafluoride specification
- Issued on:2017-12-29
- Implemented on:2018-07-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
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《GB/T 13375-2017天然六氟化铀技术条件》由TC58（全国核能标准化技术委员会）归口，TC58SC5（全国核能标准化技术委员会核燃料技术分会）执行，主管部门为国家标准化管理委员会。
Introduction
1. Background and significance of standard revision
GB/T 13375-2017 "Technical Conditions for Natural Uranium Hexafluoride" is a comprehensive revision of the original standard GB/T 13375-2008, mainly optimizing the terminology, index limits and test methods. This revision fully considers the industry's technological progress and actual application needs, and improves the scientificity and operability of the standard.
2. Comparison of key technical indicators
| Project | Original standard GB/T 13375-2008 | New standard GB/T 13375-2017 |
|---|---|---|
| Requirement for uranium hexafluoride content | ≥99% | ≥99.5% |
| Liquid total absolute vapor pressure limit | See Table 1 | Optimize and clarify limit requirements |
| Total amount of impurity elements limit | ≤300μg/gU | ≤300μg/gU, newly added volatile impurity detection |
3. Uranium hexafluoride content and vapor pressure control
Requirements for Uranium hexafluoride content:The content of natural uranium hexafluoride is expressed as mass fraction and should not be less than 99.5%. This is a key indicator to ensure product quality.
Total absolute vapor pressure control:The total absolute vapor pressure limits of liquid and solid natural uranium hexafluoride are shown in Table 1 and Table 2 respectively. These indicators are crucial to ensure the safety of the product during storage and transportation.
Application case: Determination of vapor pressure of liquid uranium hexafluoride
Using the liquefied sample splitting device specified in EJ/T 895, combined with the saturated vapor pressure determination device and method of the uranium hexafluoride impurity system, the total absolute vapor pressure in the container can be accurately measured. If necessary, the sampling system shall be used for calibration.
4. Chemical impurity control and detection
Non-volatile impurities:At 300℃ and vapor pressure not more than 101.3kPa, the total amount of 19 impurity elements such as silver and aluminum in non-volatile nitrides shall be ≤300μg/gU.
Volatile impurities:The newly added Table 3 lists the content limits of volatile impurity elements, which shall be strictly tested and controlled in accordance with the standards.
Instruments and testing methods
- EJ/T 303 sampler:Used for sampling products after liquefaction and homogenization.
- ICP-AES method:Used for determining the content of metallic impurity elements such as calcium and chromium.
- Spectrophotometry:Used to detect the content of arsenic, silver and other elements.
5. Recommendations for the implementation of the standard
Production link:It is recommended that enterprises establish a sound quality management system and strictly follow the standards for raw material procurement, production process control and finished product inspection.
Testing agency:Equipped with advanced testing equipment, such as full-spectrum direct reading spectrometer (ICAP6500 model) and spectrophotometer to ensure the accuracy and reliability of data.
Education and training:Regularly conduct standard training for technical personnel, especially the understanding and implementation of new clauses, to improve the overall technical level.
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