Yu-Lin Liu , Ming-Kun Shuai , Fa-Hai Ba , Shuang Zhou , Ci-Luo Qu-Bi , Yin-Hui Che , Qiang Chen , Tong-Hao Jiang , Yi Gong , Zhen-Guo Yang
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引用次数: 0
Abstract
The main transformer control circuit is used to control and distribute electric power, and its reliability plays an important role in normal and stable operation of a nuclear power plant. In this paper, an unexpected fusing failure occurring on one power cable inside the cabinet of the main transformer control circuit of a nuclear power plant was addressed. By means of comprehensive investigation including morphologies observation of the fused area, materials characterization of the copper conductor and polymer insulation sheath, and compositions analysis of the corrosion products, it was identified that the failure was mainly resulted from the multiple factors in the manufacturing, installation and operation procedures. Under this condition, the root cause and contributing factors of the failure were determined, and a vicious circle that was originated from mechanical damage, accelerated by electrochemical corrosion, and functioned via heat accumulation was proposed to describe the failure process and relevant mechanisms. Based on the analysis results, the countermeasures were proposed, which would have reference values for failure prevention of power cables serving under similar environments.
期刊介绍:
Engineering Failure Analysis publishes research papers describing the analysis of engineering failures and related studies.
Papers relating to the structure, properties and behaviour of engineering materials are encouraged, particularly those which also involve the detailed application of materials parameters to problems in engineering structures, components and design. In addition to the area of materials engineering, the interacting fields of mechanical, manufacturing, aeronautical, civil, chemical, corrosion and design engineering are considered relevant. Activity should be directed at analysing engineering failures and carrying out research to help reduce the incidences of failures and to extend the operating horizons of engineering materials.
Emphasis is placed on the mechanical properties of materials and their behaviour when influenced by structure, process and environment. Metallic, polymeric, ceramic and natural materials are all included and the application of these materials to real engineering situations should be emphasised. The use of a case-study based approach is also encouraged.
Engineering Failure Analysis provides essential reference material and critical feedback into the design process thereby contributing to the prevention of engineering failures in the future. All submissions will be subject to peer review from leading experts in the field.