Continuous Process of Safety Enhancement in Operation of Czech WER Units

摘要

A continuous process of a safety enhancement of VVER units in the Czech Republic is briefly described including a presentation of important milestones and examples of particular safety measures already implemented. A special attention is given to the evaluation and implementation of safety measures following stress tests recommendations and R&D activities supporting this process. As examples an implementation of the design extension condition without core melt" concept and various activities related to severe accident mitigation strategies are presented in the more detailed way.