Report

Vibrations Caused by Load-follow in NPPs - Impact on the dynamic behavior of significant systems, structures and components

Updated 2025-04-30 Published 2019-02-19

The significant increase of electricity production of highly intermittent nature, like wind and solar, can cause a situation where load follow of nuclear power plants will be necessary. This study features a theoretical mapping of vibration problems that may occur when a nuclear power plant is operated in load follow mode, and how it might affect the main components of the plant.

Nuclear power plants have traditionally been designed for base load operation, and more easily adjustable generating units are used for regulating the grid.

To minimize the risk for deterioration and premature failures caused by high vibrations due to load follow, it is vital to have an understanding of what type of problems that may occur and how it might affect the main components of the plant. Apart from understanding the problematics, it is of course also important to know how to avoid problems and mitigate them. In this way, a safe and reliable long-term operation of the NPP can be assured. 

 

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About the report

Report number

2018:521

Author

Rainer Nordmann & Christopher Ranisch