[en] A project presenting the performed modernization of the accident localization system at the Kozloduy NPP units 3 and 4 based on the jet-vortex condenser has been realised by Kozloduy NPP and Technical University, Department of Heat and Nuclear Energy. The final product is a multi-media presentation (available in English and Bulgarian) on CD - ROM for PC. In several following articles this elaboration is presented. In the article the preconditions for the modernisation and the jet-vortex condenser construction are given in details

[en] The paper present the behavior of the accident localization system in case of pipeline rupture in the primary circuit of the units 3 and 4 after the implementation of the modernization program. The program includes installation of a jet-vortex condenser. The cases with double rapture of a pipeline D_y200 mm and D_y500 mm are described. In the result of the program implementation the radiation consequences are significantly limited due to the condenser playing the role of a filter during the first second of the accident as well as due to the low values of the pressure during the whole accident. Thus the modernization program fulfills its purpose to assure non-exceeding of the radiation limits in case of double rupture of a main circulation pipeline

[en] A project presenting the performed modernization of the accident localization system at the Kozloduy NPP units 3 and 4 based on the jet-vortex condenser has been realised by Kozloduy NPP and Technical University, Department of Heat and Nuclear Energy. The final product is a multi-media presentation (available in English and Bulgarian) on CD - ROM for PC. In several following articles this elaboration is presented. In this article the working principle of the jet-vortex condenser is given in details