Study on Neutron Absorption Testing Technology of B4C_Al Material
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摘要: 核电厂反应堆乏燃料水池的安全性是核电厂十分重要的安全性问题。其中，中子吸收材料的性能关系到乏燃料水池的安全性。在乏燃料水池中放入同种中子吸收材料的挂片，通过定期检查挂片的性能可以对乏燃料水池中子吸收材料的可靠性进行评估。我们开展的B4C Al合金挂片检测设备的研制工作，有望在评估核电厂反应堆乏燃料水池的安全性方面发挥重要作用。该套检测设备首先通过采用面密度已知的标准板制定标准曲线，再以此为标准，根据中子透射率检测挂片的面密度，从而反映出乏燃料水池贮存格架材料的中子吸收能力，为反应堆乏燃料水池的安全性检测提供了技术手段。该设备是国内首台硼铝合金挂片检测设备，该设备的研制为以后开展国产含硼中子吸收材料的无损检测研究奠定了实验基础。Abstract: The safety of spent fuel pools in nuclear power plants is a very important safety issue for nuclear power plants, and the performance of neutron absorbing materials is related to the safety of spent fuel pools. The hanging piece of the same kind of neutron absorbing material is placed in the spent fuel pool, and the reliability of the neutron absorbing material in the spent fuel pool can be evaluated by periodically checking the performance of the hanging piece. The development of our B4C_Al alloy coupon testing equipment is expected to play an important role in assessing the safety of spent fuel pools in nuclear power plants. The test equipment firstly establishes a standard curve by using the standard samples with known surface density of 10B, and then the surface density of the sample would be calculated according to the neutron transmittance, thereby reflecting the neutron absorption capacity of the spent fuel pool storage material, and providing a technical means for the safety inspection of reactor spent fuel pools. The equipment is the first boron aluminum alloy coupon testing equipment in China. The development of this equipment lays the experimental foundation for the future non-destructive inspection of domestic boron-containing neutron absorption materials.
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Key words:
- B4C_Al /
- surface density of 10B /
- non-destructive inspection
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