Investigation of VVER-440 Confinement Response During DBA After Leaktightness Improvement

Based on Armenian Nuclear Power Plant (VVER-440/270) example the response of confinement to leaktightness improvement in case of design basis accident was investigated. The main interest of the investigation is to determine the influence of confinement leaktightness improvement on the reduction of available NPSH of active safety systems pumps (ECCS and spray systems). Results of analyses showed that confinement leaktightness improvement will lead to strong underpressure condition and endanger ECCS pumps operation due to cavitation. Hence, in parallel with confinement leaktightness improvement confinement vacuumization prevention means must be considered.

The Armenian nuclear power plant: problems of electricity export

The prerequisites for the development of Armenia’s nuclear power industry are indicated. The main geopolitical problems of operation of the Armenian NPP are revealed through studying the electric power market of the South Caucasus with the definition of the export opportunities of Armenia. The main problems of nuclear fuel supplies to the Armenian NPP are studied. Recommendations are given on the long-term development of nuclear energy in Armenia.