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Probability Nonlinear Analysis of Reinforced Concrete Containment Damage Due to High Internal Overpressure

Domenii publicaţii > Stiinte ingineresti + Tipuri publicaţii > Articol în volumul unei conferinţe

Autori: Králik,J

Editorial: The International Institute of Informatics and Systemics, Austin, Texas, USA, International Conference on Computing, Communications and Control Technologies (CCCT 2004), Date: AUG 14-17, 2004 , 4, p.85-90, 2004.


In this paper the knowledge from reliability analysis of concrete containment for WWER 440 under high internal overpressure is presented. There is showed summary of calculation models and calculation methods for the probability analysis of the structural integrity in the case of the loss of coolant accident (LOCA). In the case of the analysis PSA 2 level it is necessary to determine the probability of the concrete structure failure under higher overpressure. The non-linear analysis of the concrete structures was realized to take into account layered approximation of the shell elements with various material properties. The uncertainties of the loads levels (longtime temperature and dead loads), the material properties (concrete cracking and crushing, reinforcement, and liner) and other influences following the inaccuracy of the calculated model and numerical methods were taken in the account in the 106 direct MONTE CARLO simulations statistically independents. The results of the probability analysis of the containment failure under high overpressure show that in the case of the LOCA accident at 122,7kPa the probability is smaller then required 10-4.

Cuvinte cheie: Concrete containment, WWER 440, structural integrity, concrete cracking and crushing, ANSYS, MONTE CARLO, probability