On the Study of the Stress-Strain State of the IVV.10M Reactor Vessel and In-Vessel Components under Seismic Impacts

摘要

The problem of the seismic stability of the new IVV. 10M research reactor is considered. To computationally prove the viability of the engineering solutions, a detailed finite element model of a reactor is developed in strict accordance with the design documentation. The model represents the actual interrelations between all load-carrying elements and loads acting on the structure. A computational investigation of the stress-strain state of a reactor is carried out using the AN SYS bundled software. The natural osculation frequencies and natural mode shapes of the structure are determined by linear-spectral analysis. The dynamic impacts occurring under seismic conditions are computed taking into consideration the actual response spectra. The most heavily loaded sectors in the reactor vessel and in-vessel components are established. A quantitative assessment of the stress-strain-state parameters in the crucial regions of the reactor is carried out. The computational results are compared with the figures of the normative documents currently in force in domestic nuclear-power engineering.