Showing papers in "Nuclear Engineering and Design in 2016"

TL;DR: A detailed study on different heavy metal (56Ba, 64Gd, 82Pb, 83Bi) oxide glasses has been presented on the basis of different gamma rays shielding parameters as reported by different researchers in the recent years as discussed by the authors.

TL;DR: BISON as discussed by the authors is a modern finite element-based nuclear fuel performance code that has been under development at Idaho National Laboratory (INL) since 2009 and has been used to analyze a variety of fuel forms in 1D spherical, 2D axisymmetric or 3D geometries.

TL;DR: In this article, a modified mechanistic force-balance model for bubble departure in subcooled flow boiling has been proposed to evaluate the predictive accuracy of the predicted bubble departure diameter in a wide range of orientation angle, subcooling, heat flux, mass flux and pressure conditions.

TL;DR: In this paper, a 19-pin hexagonal rod bundle with wire spacers, cooled by forced-convective LBE was completed at the Karlsruhe Liquid Metal Laboratory (KALLA).

TL;DR: In this paper, the authors compare the results obtained by the different participants with the reference Nek5000 results, especially for the cross-flow data, and highlight issues with current modeling approaches, which is intended both to serve as a surrogate for physical experiments and to provide insight into experimental results.

TL;DR: In this article, a review of thermal-hydraulics and safety system for the reactor containment is vital, as it is the last barrier to radioactive leakage, and it also adversely affects the progress of nuclear power industry.

TL;DR: In this paper, the authors propose a baseline model for polydisperse bubbly flows which is presently developed at HZDR and demonstrate that a modification of the baseline model will only be done if it bases on physical considerations and improves the overall performance of the model.

TL;DR: In this paper, the retention performance of the SiC layer in tristructural isotropic (TRISO) coated particles is analyzed using X-ray tomography and optical and scanning electron microscopy.

TL;DR: In this paper, the effect of the tube wall on the fluid flow and heat transfer was numerically investigated in both the composite and uniform packed beds of spheres with low tube to particle diameter.

TL;DR: The NACIE-UP experimental facility at the ENEA Brasimone Research Centre (Italy) allowed to evaluate the heat transfer coefficient of a wire-spaced fuel bundle cooled by lead-bismuth eutectic (LBE) as mentioned in this paper.

TL;DR: The AGR-1 experiment contained 72 low-enriched uranium oxide/uranium carbide TRISO coated particle fuel compacts in six capsules irradiated to burnups of 11.2 to 19.6% FIMA, with zero TRISO coating failures detected during the irradiation as discussed by the authors.

TL;DR: Kim et al. as mentioned in this paper performed CFD analysis for various airfoil fin configurations using ANSYS CFX 15.0, and made correlations for predicting the Nusselt number and the Fanning friction factor.

TL;DR: In this paper, the authors used the CFD code FLUENT to simulate convective condensation of steam-air mixture and steam-helium mixture in vertical tubes, and the results matched well with the experimental data.

TL;DR: In this paper, the transverse vibration of pipe conveying fluid made of functionally graded material (FGM) is addressed, and a differential equation of motion expressed in non-dimensional quantities is derived by using Hamilton's principle for systems of changing mass.

TL;DR: The comparison of importance rankings obtained with the various methods shows that even the simplest methods can be sufficient for the analysis of fuel maximum temperature, however, theAnalysis of the gap conductance requires more powerful methods that take into account the interactions of the inputs.

TL;DR: The fission product retention of irradiated low-enriched uranium oxide/uranium carbide tri-structural isotropic (TRISO) fuel compacts from the Advanced Gas-Cooled Reactor 1 (AGR-1) experiment has been evaluated at temperatures of 1600-1800 °C during post-irradiation safety tests as discussed by the authors.

TL;DR: In this article, Taguchi method and artificial neural network (ANN) were employed to find an optimal mixture of Colemanite based concrete in order to improve the boron content of concrete and increase thermal neutron absorption without violating the standards for physical and mechanical properties.

TL;DR: The third International Benchmark Exercise (IBE-3) conducted under the auspices of OECD/NEA is based on the comparison of blind CFD simulations with experimental data addressing the erosion of a stratified layer by an off-axis buoyant jet in a large vessel as mentioned in this paper.

TL;DR: In this article, a three-dimensional model of a vertical dry cask has been constructed for computer simulation by using the ANSYS/FLUENT code, and the effects of canister fill gas (helium or nitrogen), internal pressure (1-6m), and basket material (stainless steel or aluminum alloy) were studied to determine the peak cladding temperature (PCT) and the canister surface temperatures (CSTs).

TL;DR: In this article, the sensitivity of the probe measurements to sampling frequency is investigated in 13 two-phase flow conditions with superficial liquid and gas velocities ranging from 1.00-5.00

TL;DR: In this article, the relation of the similitude-criterion concerning the pressure loss is presented by using the dimensionless analysis, and mathematical models for critical droplet diameter, grade efficiency and overall separation efficiency are established by analyzing the features of the droplet trajectory in gas swirling flow field.

TL;DR: In this paper, a hybrid method combining intersection point detection and watershed segmentation is used to separate the overlapping bubbles, which can preserve more features captured in the raw image compared to the simple ellipse fitting method.

TL;DR: In this paper, a three dimensional model based on Euler-Euler two-fluid model was established to simulate the steam jet direct contact condensation with air involved, which can predict the steam-air jet condensation process quite reasonably.

TL;DR: In this article, a 1:4 scale model of a pre-stressed concrete containment vessel (PCCV) is analyzed under pressure and high temperature effects with considering anchorage details of liner plate.

TL;DR: In this paper, the authors compare the performance of two core concepts under severe accident transients: a reactivity insertion (unprotected transient overpower, UTOP) and an overall loss of core cooling (Unprotected loss of flow, ULOF).

TL;DR: In this paper, the authors present and discuss the results of Computational Fluid Dynamic (CFD) analyses for calculating the friction pressure losses of isothermal flows of liquid sodium, water, and helium gas, on the shell side of annular heat exchangers (HEXs) of concentric, helically coiled tubes.

TL;DR: In this article, the authors examined the capabilities and limitations of steady Reynolds-Averaged Navier-Stokes (RANS) approach for rod bundle problems, based on the round robin benchmark of computational fluid dynamics (CFD) codes against the NESTOR experiment for a 5 × 5 rod bundle with typical split-type mixing vane grids.

TL;DR: TRITium Diffusion EvolutioN and Transport (TRIDENT) was developed for use with FHRs and benchmarked with experimental data as mentioned in this paper, which is the first model to integrate the effects of tritium production in the salt via neutron transmutation.