RPV investigations of Greifswald WWER-440 units: New dosimetry results and material testing concepts

The investigation of the well documented different irradiation/annealing states of the four former Greifswald units are a special advantage to assess the reactor pressure vessel integrity and to check the corresponding rules.
The results of new, more accurate calculations of the neutron fluence will be given. Further, the change of the RPV dismantling strategy requires a new approach for the trepanning procedure. The new procedure will be shortly described as well as some aspects of the material investigation program.