BPVC-III NCA-2017 provides requirements for the materials, design, fabrication, examination, testing, inspection, installation, certification, stamping, and overpressure protection of nuclear power plant components, and component and piping supports. Components include metal vessels and systems, pumps, valves, and core support structures. The components and supports covered by this Section are intended to be installed in a nuclear power system which serves the purpose of producing and controlling the output of thermal energy from nuclear fuel and those associated systems essential to the functions and overall safety of the nuclear power system. This Section provides requirements for new construction and includes consideration of mechanical and thermal stresses due to cyclic operation. Deterioration which may occur in service as a result of radiation effects, corrosion, erosion, or instability of the material is not covered. Rules pertaining to the use of N, NPT, NA and NV Code symbol stamps are also included.