Deterministic and Probability Analysis of Paper Machine Vibration Impact to the Structure Safety and Human Comfort

This paper describes the probability and sensitivity analysis of the concrete frame and paper machine interaction. On the base of the experimental results, the calculation FEM model was verified. The uncertainties of the loads level, the material properties and other influences following the inaccuracy of the calculated model and numerical methods were considered in the approximation method RSM

Analysis of Soil-Structure Interaction Effects of NPP Structures on Nonhomogeneous Subsoil

This paper describes the soil-structure interaction (SSI) effects to the Nuclear Power Plant (NPP) structure with reactor VVER-1200. The simplified 1D and numerical 3D FE models of the nonhomogeneous subsoil are investigated. The methodology of the calculation of the frequency dependent complex functions of the soil stiffness and damping is presented

Deterministic and probabilistic analysis of npp communication bridge resistance due to extreme loads

This paper presents the experiences from the deterministic and probability analysis of the reliability of communication bridge structure resistance due to extreme loads - wind and earthquake. On the example of the steel bridge between two NPP buildings is considered the efficiency of the bracing systems. The advantages and disadvantages of the deterministic and probabilistic analysis of the structure resistance are discussed. The advantages of the utilization the LHS method to analyze the safety and reliability of the structures is presented

Nonlinear analysis of the failure of nuclear hermetic reinforced concrete structure due to extreme pressure and temperature

This paper describes the nonlinear analysis of the reinforced concrete hermetic containment under an accidental temperature. The scenario of the hard accident in NPP and the methodology of the calculation of the failure temperature using the safety assessment are presented. The experimental and project material properties are taken into account in the safety assessment

CFD simulation of air flow over an object with gable roof, revised with Y+ approach

Aim of this contribution is to provide insight view into analysis focused on obtaining external pressure coefficients on isolated two storey low-rise building with 15° elevation gable roof using Computer Fluid Dynamics simulation and these are compared to values that offering Eurocodes. Final Volume Model consisting of polyhedral mesh will be used for analysis with two different turbulence models. Mesh was created with respect to y+ parameter, where desired value was below one which leads us to fine mesh type. Secondary aim of this contribution is to compare performance of selected turbulence models. For this purpose were chosen Detached Eddy Simulation and Large Eddy Simulation which are part of the Scale Resolving Simulation turbulence models

Terrorism and its context

Tato práce se zabývá problematikou terorismu z pohledu vymezení terorismu, jeho historického vývoje, možných příčin, projevů a důsledků ve vztahu k bezpečnostnímu prostředí. V závěru práce se zaměřuji na problematiku forem terorismu a také na možné nástroje a spolupráci v boji proti jeho negativním vlivům.Thesis deals with terrorism and its context from the perspective of defining, historical evolution, potential causes and impacts of terrorism on security environment. The conclusion of thesis is focused on possible forms of terrorism and impacts on human society and possible means and collaboration in fight against terrorism.

Optimálny návrh ochrany haly reaktorovne pred pádom kontajnera s jadrovým palivom využitím simulačných metód

This paper presents of the optimal design of the damping devices cover of reactor hall under impact of nuclear fuel container drop of type TK C30. The finite element idealization of nuclear power plant structure is used in software ANSYS. The steel pipe damper system is proposed for dissipation of the kinetic energy of the container free fall in comparison with the experimental results. The probabilistic and sensitivity analysis of the damping devices was considered on the base of the simulation methods in program AntHill using the Monte Carlo methodV článku sa prezentuje optimálny návrh tlmiaceho zariadenia na ochranu haly reaktorovne pred pádom kontajnera s jadrovým palivom typu TK C30. Priestorovým konečno-prvkovým modelom bola idealizovaná konštrukcia jadrovej elektrárne v programe ANSYS. Experimentálne overený systém tlmičov bol navrhnutý z oceľových rúrok na pohltenie kinetickej energie od pádu kontajnera. Pravdepodobnostná a citlivostná analýza tlmiaceho zariadenia bola realizovaná využitím simulačných metód v programe AntHill s využitím metódy Monte Carl

Bezpečnosti JE na Slovensku z pohľadu záťažových testov po nehode vo Fukushimi

This paper presents the new requirements to test of the safety and reliability of the NPP structures due to the last nuclear accidents in the world. The accidents of the NPP in Chernobyl and Fukushima give us the new inspiration to verify the safety level of the NPP structures. The probabilistic assessment of NPP structures for PSA level 2 of VVER 440 in the case of LOCA accident is presented. The results of the probabilistic nonlinear analysis of the NPP structures are presented.Článok sa zaoberá novými požiadavkami na testovanie bezpečnosti a spoľahlivosti konštrukcií JE v dôsledku posledných jadrových nehôd vo svete. Havárie JE v Černobile a vo Fukushimi dávajú nové inšpirácie pre verifikovanie úrovne bezpečnosti konštrukcií JE. Rozoberá sa pravdepodobnostná metodológia konštrukcií JE pre PSA úrovne 2 reaktora VVER 440 v prípade havárie LOCA. Uvádzajú sa výsledky pravdepodobnostnej nelineárnej analýzy konštrukcií JE

Probabilistic nonlinear analysis of reinforced concrete bubbler tower structure failure

This paper describes the reliability analysis of concrete bubbler tower structure of nuclear power plant with the reactor WWER 440 under high internal overpressure. There is showed summary of calculation models and calculation methods for the probability analysis of the structural integrity considering degradation effects and high internal overpressure. The uncertainties of the resistance and the calculation model were taking in the account in the RSM method.This paper describes the reliability analysis of concrete bubbler tower structure of nuclear power plant with the reactor WWER 440 under high internal overpressure. There is showed summary of calculation models and calculation methods for the probability analysis of the structural integrity considering degradation effects and high internal overpressure. The uncertainties of the resistance and the calculation model were taking in the account in the RSM method