Showing papers in "Nuclear Engineering and Design in 2014"

TL;DR: In this article, the authors presented a detailed nonlinear finite element model for predicting the behavior and failure of SC wall panels subjected to combinations of in-plane forces and moments, and verified the results from these investigations are used to develop an interaction surface in principle force (Sp1-Sp2) space that can be used to design or check the adequacy of SCwall panels.

TL;DR: The ASTEC V2.0 as mentioned in this paper is the most recent version of the ASTEC integral code, which has been developed jointly by IRSN and GRS to simulate the behavior of a whole nuclear power plant under severe accident conditions, including severe accident management by engineering systems and procedures.

TL;DR: In this paper, the thermal-hydraulic correlations for an airfoil printed circuit heat exchanger (PCHE) were developed by three-dimensional computational fluid dynamics (3D-CFD) analysis, which are applicable over the range of Reynolds number from 0 to 150,000.

TL;DR: In this article, the core parameters have been fixed in a comprehensive approach taking into account the main technological constraints and goals of the system from the very beginning: the limiting temperature of the clad and of the fuel, the Pu enrichment, the achievement of a burn-up of 100 GWd/t, the respect of the integrity of the systems even in design extension conditions (DEC).

TL;DR: In this article, a numerical model was developed to predict early age cracking for massive concrete structures, and especially concrete nuclear containment vessels, and they found that these structures are highly sensitive to the creep phenomenon.

TL;DR: In this paper, the appropriateness of different contact point modification approaches for forced convective heat transfer analysis in structured packed beds of spheres was investigated, and the effects caused by the bridge size for the bridges treatment were discussed, and numerical results were compared with available experiments in literature.

TL;DR: In this paper, Gd2O3-10SiO2-10CaO-xGdO3 (where x = 15, 20, 25, 30 and 35) has been fabricated and investigated for their radiation shielding, physical and optical properties.

TL;DR: A comprehensive review of single-phase natural circulation loop (NCL) is presented in this paper, with occasional obligatory reference to a few pioneering studies originating prior to that period, summarizing the key observations and the present trend of research.

TL;DR: In this article, several closed Brayton cycles including supercritical CO2 cycle, helium cycle and nitrogen cycle have been compared to each other in terms of cycle performance and physical size for small modular SFR application.

TL;DR: An overview of the challenges facing integrated deterministic and probabilistic safety assessment is given and the related implications in terms of research perspectives are discussed.

TL;DR: In this paper, the authors present and validate a mathematical model implemented in ANSYS CFD for the simulation of wall condensation in the presence of non-condensable substances.

TL;DR: In this article, the authors evaluated wire-wrapped fuel bundle friction factor correlations to identify their comparative fit to the available pressure drop experimental data and found that the detailed Cheng and Todreas correlation yielded the best fit.

TL;DR: In this article, the effect of Hartmann number, particle volume fraction, Rayleigh number and the inclination of magnetic field on the flow and heat transfer characteristics of a magneto hydrodynamic (MHD) natural convection flow of Cu-water nanofluid was investigated numerically using lattice Boltzmann method (LBM) scheme.

TL;DR: In this article, the effects of orientation angle, subcooling, heat flux, mass flux, and pressure on bubble departure diameter in the isolated bubble regime of subcooled flow boiling were studied by high-speed video in a two-phase flow loop that can accommodate a wide range of flow conditions.

TL;DR: In this article, a custom condensation model for commercial CFD code Fluent is presented, which is suitable for both compressible and incompressible flow of air-steam mixture with additional non-condensable gases.

TL;DR: In this article, the authors suggest the design of the turbomachinery necessary for the S-CO2 Brayton cycle coupled to water-cooled SMRs, and the suggested design methodology is first tested with the existing experimental data to verify its capability.

TL;DR: In this article, a fuel-assembly simulator with four heated rods was installed inside a square channel with rounded corner, and the experimental data indicated a non-uniform circumferential wall-temperature distribution around the heated rod.

TL;DR: In this article, the mixed convection boundary layer flow of nanofluids on a stagnation-point flow over a permeable stretching/shrinking sheet subject to thermal radiation, heat source/sink, viscous dissipation and chemical reaction by using numerical method.

TL;DR: In this article, an operational assessment of four different candidate composite materials was performed for nominal conditions in a reference PWR with Zr-based cladding, and the impact of UN porosity on the operational performance was assessed.

TL;DR: The 2nd International Benchmark Exercise (IBE-2) has been conducted to provide high-precision data of detailed turbulent flow mixing in a rod bundle for validating the CFD codes being used widely in the nuclear power industry.

TL;DR: In this paper, the applicability of some industry-standard equivalent linear (SHAKE) and nonlinear (DEEPSOIL and LS-DYNA) programs across a broad range of frequencies, earthquake shaking intensities, and sites ranging from stiff sand to hard rock, all with a focus on application to safety-related nuclear structures.

TL;DR: Considering the effects of pipe wall thickness, fluid pressure and velocity, a developed 14-equation model is presented in this paper, which describes the fluid-structure interaction behavior of pipelines.

TL;DR: In this article, numerical analysis using finite difference approach with line method is performed on the laminar magneto-hydrodynamic natural convection in a square enclosure filled with a porous medium to investigate the effects of viscous dissipation and radiation.

TL;DR: In this paper, an experimental campaign has been undertaken at the Karlsruhe Liquid Metal Laboratory (KALLA) in the frame of the European research project THINS (Thermal Hydraulic of Innovative Nuclear Systems, 2010-2014).

TL;DR: In this paper, the authors present a status of research and understanding of fuel-coolant interaction and the main characteristics of the model developed in the 3-dimensional computer code MC3D.

TL;DR: In this article, the effect of wall subcooling on the steam condensation heat transfer coefficients has been researched by experiments when the pressure and the air mass fractions are stable. And the empirical correlation is developed for the heat transfer coefficient which covered all data points within 15%.

TL;DR: In this paper, the authors investigated flow boiling properties of helically-coiled tubes and predicted their flow boiling heat transfer coefficients (HTC) and dryout qualities using Steiner and Taborek correlation for straight vertical tubes.

TL;DR: In this paper, a reference reactor pressure vessel (RPV) subjected to pressurized thermal shocks (PTSs) was applied to calculate the probabilities for crack initiation and failure of a RPV subjected to two PTS transients, by considering different crack types, sizes and orientations.

TL;DR: In this article, the authors observed the global boiling structure and dynamic behavior of dry areas in a synchronized manner to identify the critical heat flux (CHF) triggering mechanism in a horizontal pool boiling of saturated water.