小型氦氙冷却反应堆关键参数初步研究

Study on key parameters design of small helium xenon cooled reactor

使用氦氙混合气体作为冷却剂结合布雷顿热电转换系统的快中子增殖堆是未来空间核动力的发展趋势。为了提高系统效率、减小系统质量,许多学者开展了空间反应堆参数设计研究,但少有涉及氦氙冷却反应堆。本文的研究内容是小型氦氙冷却反应堆关键参数的设计。通过Fortran 95语言编程构建单通道、一次表面回热器等部件模型,建立热力系统程序。采用淹没次临界反应堆基本参数进行程序验证,并通过单个参数的敏感性分析来确定关键参数范围。结果表明:回热器对系统效率和系统质量的影响最大,压气机压比超过1.52之后再增大压比对系统质量的影响较小。本研究为小型氦氙冷却反应堆的设计提供了参考。

[Background]The fast breeder reactor using helium-xenon mixture gas as coolant combined with Brayton thermoelectric conversion system is the development trend of space nuclear power in the future.In order to improve the system efficiency and reduce the system mass,many scholars have carried out research on the design of reactor parameters,but few of them involved helium xenon cooled reactors.[Purpose]This study aims to design key parameters of small helium xenon cooled reactor.[Methods]The single channel model,primary surface regenerator and other component models were built by using FORTRAN 95 language programming,and the thermal system program was established afterward.The basic parameters of submerged subcritical reactor were used to verify the program,and the range of key parameters was determined by sensitivity analysis of a single parameter.[Results]The results show that the regenerator has the greatest influence on the system efficiency and mass,and the pressure ratio of the compressor over 1.52 has less influence on the system mass.[Conclusions]This study provides a reference for the design of small helium xenon cooled reactor.