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 on 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 was considered. Powder materials of stainless steel with Russian grades 08Cr18Ni10Ti and 10Cr16Ni25MoTi were produced to develop the DLD process. Optimization of the core baffle design was carried out to improve operating reliability. Samples and fragments of the core baffle were manufactured by DLD method with complex research and tests. The concept of an experimental DLD unit for large-scale parts were developed.