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Vibrations Caused by Load-follow in NPPs

| 2018:521 | Rainer Nordmann & Christopher Ranisch
The nuclear power plants have traditionally been designed for base load operation, and more easily adjustable generating units are used for regulating the grid.
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However, 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. Apart from understanding the problematics, it is of course also important to know how to avoid problems or mitigate them. In this way, a safe and reliable long-term operation of the nuclear power plants can be assured.