A method for forming integral reflective layer of stack internal components

Abstract

The invention discloses a method for forming an integral reflective layer of internal components, comprising the following steps: 1) selecting raw materials for the integral reflective layer manufactured by laser melting and additive manufacturing; 2) performing additive manufacturing according to the size of the integral reflective layer Program writing; 3) Surface treatment of the substrate for additive materials; 4) Using laser as a heat source, the additive raw materials are melted and deposited on the substrate layer by layer by powder feeding and melting method, so as to realize the molding of the integral reflective layer; 5) For the The integral reflective layer is subjected to solid solution heat treatment; 6) The integral reflective layer is stabilized; 7) The integral reflective layer is subjected to liquid penetrant inspection; 8) The integral reflective layer is subjected to ultrasonic inspection. Strengthening ribs integrally formed with the coaming are set at the weak link of the coaming, which improves the rigidity of the core reflector structure, makes the integrally formed core reflector have better structural continuity and better mechanical properties, and at the same time shortens the manufacturing cycle. It is greatly shortened and the manufacturing process is greatly simplified.

Description

technical field [0001] The invention relates to the field of nuclear reactor structure design, in particular to a method for forming an integral reflective layer of a reactor internal component. Background technique [0002] The integrated reflective layer structure of the reactor internals is a key part of the reactor structure. It is generally composed of several coaming plates, several forming plates, thousands of bolts and positioning pins, which are connected by fasteners to form a whole and installed in the reactor. Inside the barrel of the inner member. The structure has complex composition, numerous parts, and high design and manufacturing precision, which has basically reached the limit of the existing manufacturing capacity. At the same time, the structure composed of thousands of parts is not conducive to the safety of the long-term operation of the reactor under the conditions of flow-induced vibration, high radiation, and high temperature; the third-generation ...

AI Technical Summary

Problems solved by technology

The structure is complex, there are many parts, and the design and manufacturing precision is high, which has basically reached the limit of the existing manufacturing capacity.

At the same time, the structure composed of thousands of parts is not conducive to the safety of the long-term operation of the reactor under the conditions of flow-induced vibration, high radiation, and high temperature; the third-generation advanced reactors such as AP1000 adopt integrally machined or integrally welded core reflectors structure, but the processing volume of these overall machined structures is too large. The core reflector structure formed by integral welding is assembled and welded by thin plate structural parts. The welding deformation is too large, the accuracy is difficult to control, and the structural strength is average.

Images