Development of Direct Laser Deposition Technology for Large-Scale Products of Nuclear Power Engineering

The main advantages of direct laser deposition (DLD) of large-sized products are discussed by the example of the internal core baffle of a pressurized water reactor (VVER core baffle). The problem of product damage during operation as a part of reactor is considered. Powder materials made of 08Cr18Ni10Ti and 10Cr16Ni25MoTi stainless steels are produced to develop the DLD process. Optimization of the core baffle design is carried out to improve operating reliability. Samples and experimental small fragments of the core baffle for complex research and tests are manufactured by the DLD method. The concept of an experimental DLD unit for large-scale parts is advanced.