Geometrically and Material Non-linear Analysis of Bubble Condenser SteelStructure

摘要

In frame of the project funded by the European Commission (EC) through the Phare and Tacis Programmesexperimentally investigate the behaviour of the bubble condenser system (BCS) during phenomena induced bypostulated design basis accidents (DBA). The bubble condenser steel structure consists of 12 trays. To enable theBubble Condenser Test Prototype to be representative of the majority of trays and sections, it was decided to model atypical tray. The test results demonstrate the integrity of the standard tray pressure retaining boundary (side wall, facewall, ceiling and bottom) against a differential pressure (30 kPa).The stability of the side wall and the face wall of tray level 12 was not assured for this differential pressure. Thethermal-hydraulic tests demonstrate that the maximum differential pressure across the tray walls in the case of LargeBreak Loss of Coolant Accident (LBLOCA) is 20 kPa.We have got from the experiences the differential pressure in function of time. The results of the approximatecalculations showed the effect of nonlinearly. In case of calculation by FEM model we have done the elastic and linearanalyses, and calculated with the geometrically and material non-linearity.