Structural reliability for containment of VVER 440/213 type

Probability and Sensitivity Nonlinear Analysis of the Hermetic Cover of Main Shut-off Valve under Extreme Pressure and Temperature

“…The nonlinear probabilistic analysis of MSV steel covering failure is in accordance with the IAEA requirements [7] and NRC [21,22], experiences from the similar analysis NPP in abroad [20], new knowledges from the probabilistic analysis of structures [2,5,8,9]. Sensitivity analysis of steel plane frames with initial imperfections [9] and our experiences from the previous analysis [12][13][14][15][16][17][18].…”

“…This report is based on methodology of the probabilistic analysis of structures of hermetic zone of NPP with reactor VVER44/213 detailed described in work [12,13,16]. The nonlinear probabilistic analysis of MSV steel covering failure is in accordance with the IAEA requirements [7] and NRC [21,22], experiences from the similar analysis NPP in abroad [20], new knowledges from the probabilistic analysis of structures [2,5,8,9].…”

“…The ENEL Company propose the maximum temperature in the reactor shaft is equal about to 1800 o C and in the containment around the reactor shaft is equal about to 350 o C [15,16]. The possibility of the temperature increasing to the containment failure state is considered in the scenario too.…”

“…After the accident of nuclear power plant (NPP) in Fukushimi the IAEA in Vienna adopted a large-scale project "Stress Tests of NPP", which defines the new requirements for the verification of the safety and reliability of NPP under extreme effects of internal and external environments and the technology accidents [3,7,15,16,25]. The experience from these activities will be used to develop a methodology in the frame of the project ALLEGRO, which is focused to the experimental research reactor of 4 th generation with a fast neutron core.…”

Nonlinear Analysis of the Hermetic Postament Safety During Technology Accident in the Nuclear Power Plant

“…The methodology of these analyses is based on requirements IAEA [6] and NEA [1,19], experiences from the similar analysis NPP in abroad [3, [11][12][13], new finding from the nonlinear analysis of structures [8,[10][11][12][13][14][15][16]19], the methodology of the reliability analysis in case of the extreme loads [2,4,5,7,9,10,12,14,15,17,18,20,21] and our experiences from the previous analysis [10][11][12][13]. This contribution is based on methodology of the deterministic nonlinear analysis of the NPP technology segment collapse during the hard accident in the hermetic zone [10].…”