Compared with the development of ductile iron nuclear spent fuel container at home and abroad, in the development of 100 ton ductile iron nuclear spent fuel container in Germany, the impact property of – 40 ° C has not been designed and measured, and sand casting process is adopted. Although the self-developed cooling system is used, the defects tend to appear and the quality control is unstable In addition, silicon sand self hardening sand is used behind the chill of Nippon Steel and Nippon Steel to reduce the thermal conductivity of the chill; Ding Linpu and Ren Shanzhi used sand hanging chill as the metal mold on the outside of the 20 ton ductile iron spent fuel container, and the existence of sand layer is equivalent to the existence of metal mold molten iron interface There is an insulating layer, which reduces the chilling capacity and thermal conductivity of the metal mold; including Harbin University of science and technology, Harbin University of technology and other universities, the research on the 100 ton ductile iron nuclear spent fuel container in China only involves the simulation of solidification characteristics, the research of mechanical properties and the formation mechanism of some defects, and has not carried out systematic research or production development.

To sum up, the development and production of 100 ton nodular iron nuclear spent fuel containers in Germany has been mature, Xinbei company has produced more than 1100 100 ton nodular iron nuclear spent fuel containers; Japan has also cast 100 ton nodular iron nuclear spent fuel containers with qualified quality at the end of last century, but has not carried out mass production; at present, China can independently develop and produce 20 ton nodular iron nuclear spent fuel containers For spent fuel container, Harbin University of science and technology has cooperated with Qiqihar No.1 Machine Tool Plant in the research and development of small-scale ductile iron nuclear spent fuel container, and has produced 20 sets of bqh-20 ductile iron nuclear spent fuel containers. In China, the research on 100 ton ductile iron nuclear spent fuel container is not deep enough, there is no systematic research, and there is no ability to independently develop and produce 100 ton ductile iron nuclear spent fuel container.