Prospect of casting process of 100 ton ductile iron nuclear spent fuel container

Germany has realized the mass production of 100 ton nodular iron nuclear spent fuel containers, and has produced more than 1100 100 ton nodular iron nuclear spent fuel containers; Japan has also done a lot of research work on 100 ton nodular iron nuclear spent fuel containers, and has the ability to produce 100 ton nodular iron Nuclear Spent Fuel Containers; at present, China has only mastered 20 ton small nodular iron nuclear spent fuel containers The production technology of 20 ton ductile iron nuclear spent fuel container is mainly for experimental reactor and military reactor, and its application scope is narrow, which can not meet the needs of nuclear power development in China. According to China’s nuclear power development plan, China’s demand for ductile iron nuclear spent fuel containers is increasing rapidly. It is estimated that there will be about 800 gaps in China’s Ductile Iron Nuclear Spent Fuel Containers by 2030. With the sustainable development strategy and the development concept of “green water and green mountains are golden mountains and silver mountains” gaining popularity step by step, 100 ton ductile iron nuclear spent fuel containers will have potential huge potential in a long period of time Great economic benefits.

On the other hand, it is difficult not only to control the quality of 100 ton ductile iron spent fuel container, but also to manufacture it. It needs at least 150 tons of traveling crane to manufacture the 100 ton ductile iron nuclear spent fuel container, which is nearly 5m high and needs to melt about 150 tons of molten iron at one time. Few domestic manufacturers have the conditions to produce so much molten iron at one time and are equipped with such large tonnage traveling crane. The wall thickness of the 100 ton ductile iron nuclear spent fuel container is 520mm and the hot spot is more than 630m m. It is difficult to guarantee the low temperature performance due to the poor consistency of solidification between the body part and the hot spot part.

The data of 45 ° fan-shaped test block are obtained under the experimental conditions. Although all the indexes meet the performance indexes of ductile iron container, considering that the actual pouring 100 ton ductile iron nuclear spent fuel container has larger volume, more solidification heat and more complex solidification conditions, it is necessary to successfully pour 100 ton ductile iron nuclear spent fuel container which meets the performance indexes of foreign countries and realize 100 ton ductile iron nuclear spent fuel container There is still a lot of research work to be done in the localization of the nuclear spent fuel container of the ton grade ductile iron.

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