This diploma thesis is dedicated to the future development of nuclear energy in the EU area and its incorporation into the current EU energy policy. The work also focuses on a detailed examination of EU energy policy in terms of energy security of the Member States and throughout the text deals with the role of nuclear power as a determining factor of energy security. The work is divided into two parts - theoretical part (Chapter one) and research part (Chapter two and three). The first chapter of this thesis is devoted to current theoretical approaches to the issue of energy security. The issues of energy security are then examined in the final part of this chapter in terms of integration into the all-embracing EU energy policy. The second...