采用一体化布置、全功率自然循环冷却和紧贴式双层承压壳的核供热堆具有固有安全性和良好的经济性 ,但同时也带来了大型薄壁容器套装的新课题。该文以系统工程的方法和观点全面分析了压力壳、钢安全壳套装的关键技术问题 ,在国内外均无可借鉴经验的情况下提出套装工艺 ,并在已投入运行的 5 MW低温堆工程中得到应用。应用结果表明该套装工艺安全、可靠 ,具有良好的可操作性和独创性。对反应堆压力容器套装工艺的研究 ,对于积累核设备设计、制造和安装经验 ,制定相应的技术标准 ,推进核供热技术产业化具有一定意义 Nuclear heating reactors with an integrated layout, full-power natural circulation cooling and close-packed double-layer pressure-bearing shells are intrinsically safe and economical, but at the same time bring with them new topics for large thin-walled container sets. This paper comprehensively analyzes the key technical problems of pressure shell and steel containment suit with system engineering method and viewpoints, puts forward the suit technology without reference to the experience at home and abroad, In the application. Application results show that the package process is safe and reliable, with good operability and originality. The research on the reactor pressure vessel package process has some significance for the accumulation of nuclear equipment design, manufacture and installation experience, to develop the appropriate technical standards and promote the industrialization of nuclear heating technology