Abstract
Nuclear power plants have a number of pumps, which are operating at a high temperature–high pressure and radiation environment conditions. However, the aging of the pumps by increasing of years of plant operation and the system transients due to the sudden load change are causing the failures of the reliability of the pumps. Nevertheless, it is important to maintain the reliability of the pumps to ensure safe operation of the nuclear power plant. In this paper, an acceleration test apparatus was developed to secure the reliability of centrifugal pumps. The performance change with the increase of operation time of the pump was experimentally evaluated by the acceleration test. As the operating time of the pump increased, it was confirmed that the pump efficiency and head decreased.
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