10MW高温气冷堆乏燃料元件的贮存及其安全分析

Safety analysis of spent fuel element storage in 10MW high temperature gascooled reactor

10 MW高温气冷堆 (HTR- 10 )在设计寿命内共卸出约 9万个乏燃料元件 ,其放射性裂变产物的活度高达 1.0× 10 1 6Bq,必须妥善处置。HTR- 10乏燃料元件卸在密封和屏蔽的容器中 ,每个容器可以接受 2 0 0 0个乏燃料元件 ,这些容器固定在反应堆建筑物的最底层的混凝土井内 ,在贮存库内采取通风冷却。文中对放射性核素释放 ,临界安全和辐射屏蔽等方面进行了分析 。

Approximately 90000 spent fuel elements will be discharged from a 10MW high temperature gascooled reactor (HTR10) in its lifetime. The activity of the radioactive fission products in these spent fuel elements will reach 1.0×10 16 Bq, so these spent fuel elements should be properly managed. HTR10 spent fuel elements will be discharged into leadsteel containers, with each container designed to receive 2000 fuel elements. These containers will be stored in a concrete compartment inside the reactor building and cooled by air. This paper analyzes the release of the radioactive nuclides, the critical safety parameters and the irradiation shielding. The results show that the safety requirements can be met in the HTR10 spent fuel element storage compartment.