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Kraftanlagen Heidelberg was tasked with the design and fabrication of a plug for sealing the control rod drive enclosure tubes in the base calotte of the reactor pressure vessel in the Philippsburg nuclear power plant. In addition to engineering and fabrication, we also provided the mathematical proof that guaranteed the function.
For this purpose, multiple calculation models were processed by using the method of finite elements including non-linear calculation boundary conditions.
In particular, they were:
The result of the calculations showed the functionality of the sealing plug as well as the locking and unlocking force during the handling process. Prior to its use, the plug also underwent a practical test on a mock-up test stand and the calculations were confirmed.