Analysis and Management Advice of Common Corrosion Behavior for Essential Service Water System in Nuclear Power Plant

Abstract

The corrosion problems of essential service water system in nuclear power plant directly affect the system integrity and availability, thus threatening the safety operation power of plant. In order to control and avoid corrosion problems, in this paper, two aspects of the failure cases about internal anti-corrosive layer and the stainless steel material were summarized and analyzed. Results showed that the main reasons for the failure of the anti-corrosive layer were unreasonable construction and installation, natural aging. The main reasons for the failure of stainless steel structural components were improper material selection, structural design, and material processing technology. In response to the above failure issues, it was proposed to carry out work from two aspects: on-site construction quality control and post maintenance management to control the failure of anti-corrosive layer. Through material selection and replacement, structural improvement, and material inspection, corrosion defects of stainless steel components could be treated and prevented, which could provide reference for the corrosion management of essential service water systems in domestic nuclear power plants.

Keywords

• nuclear power plant|essential service water system|corrosive behavior|management advice