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Showing papers in "Nuclear Engineering and Design in 2009"


Journal ArticleDOI
TL;DR: MOOSE as mentioned in this paper is a parallel computational framework targeted at solving coupled, nonlinear partial di?erential equations often arise in sim- ulation of nuclear processes, which is based on mathematics based on Jacobian-free Newton Krylov (JFNK).

741 citations


Journal ArticleDOI
Zuoyi Zhang1, Zongxin Wu1, Dazhong Wang1, Yuanhui Xu1, Yuliang Sun1, Fu Li1, Yujie Dong1 
TL;DR: In this article, the Institute of Nuclear and New Energy Technology (INET) of Tsinghua University has developed and designed an HTR demonstration plant, called the HTR-PM (high-temperature-reactor pebble-bed module).

364 citations


Journal ArticleDOI
TL;DR: In this paper, four sets of experimental data (total of 658 data points) for heat transfer to liquid metals (NaK of different compositions and Hg) flowing in a triangular or square lattice of cylindrical rods with pitch-to-diameter ratios of 1.1 up to 1.95 for a wide range of Peclet numbers (30-5000) were reviewed, and analysed using a number of correlations recommended for liquid metal flowing in tube bundles.

206 citations


Journal ArticleDOI
TL;DR: In this paper, the effects of optimizing the cycle minimum temperature and pressure are investigated including minimum temperatures and/or pressures below the critical values, where a lower heat sink temperature is required the availability of which is dependent upon the climate at the specific plant site.

205 citations


Journal ArticleDOI
TL;DR: In this paper, the authors explored the design of the injection system with risk-informed analyses and computational fluid dynamics, and determined that the system has a reasonably low failure probability, and that, once injected, the nanofluid would be delivered effectively to the reactor vessel surface within seconds.

134 citations


Journal ArticleDOI
TL;DR: In this article, a mixing tee with a main to branch diameter ratio of 3.3 was used for thermal striping, and detailed temperature and velocity fields were measured by a movable thermocouple tree and particle image velocimetry.

132 citations


Journal ArticleDOI
TL;DR: In this article, the thermal-hydraulic performance of the PCHE was investigated using the KAIST helium test loop and experiments were performed in the helium laminar region with 350

121 citations


Journal ArticleDOI
TL;DR: A fuzzy proportional-integral-derivative (fuzzy-PID) control strategy, and applies it to the nuclear reactor power control system, is introduced and simulation results show the favorable performance of the fuzzy-PIDs controller.

117 citations


Journal ArticleDOI
TL;DR: In this article, the authors measured void fractions in a vertical tube with diameter of 0.15 m and length of 4.4 m. Electrical impedance void meters at four axial locations were used to measure the void fraction.

109 citations


Journal ArticleDOI
TL;DR: In this paper, a direct comparison between the two measuring techniques has been carried out, based on the measurement of the fluid conductivity, for void fraction and velocity measurements, and for the estimation of the interfacial area concentration.

92 citations


Journal ArticleDOI
TL;DR: The DEFOR-E test campaign is concerned with the DEFOR test facility commissioning and exploratory study of phenomena occurred during a debris bed formation as mentioned in this paper, which revealed the effect of water pool depth and subcooling, melt mass and material properties on the debris bed characteristics.

Journal ArticleDOI
TL;DR: In this article, the authors focus on numerical analyses of the temperature fluctuations and structural response of coolant piping at a mixing tee and show that the temperature difference between the hot and cold fluids of a tee junction and the enhanced heat transfer coefficient due to turbulent mixing are the dominant factors of thermal fatigue failure.

Journal ArticleDOI
TL;DR: The recently developed Subset Simulation (SS) method is considered for improving the efficiency of the random sampling of the probability of functional failure of an emergency passive decay heat removal system in a simple steady-state model of a Gas-cooled Fast Reactor (GFR).

Journal ArticleDOI
TL;DR: In this paper, the effects of rolling motion on the heat transfer of single-phase natural circulation flow under a rolling motion condition are investigated. But the experimental results show that rolling motion does not significantly affect heat transfer.

Journal ArticleDOI
TL;DR: In this paper, the authors developed an experimental data base with high spatial and temporal resolution of fluid flow velocity inside a 5 × 5 rod bundles with spacer grids, which is intended to validate CFD codes at various temporal-spatial scales.

Journal ArticleDOI
TL;DR: In this article, the authors determined the behavior of the flow patterns of supersonic and sonic steam jet condensation in subcooled water, and the effects of steam mass flux, water temperature and pressure ratio on the flow pattern were discussed.

Journal ArticleDOI
TL;DR: In this article, a set of three wire-mesh sensors with a grid of 16 × 16 measuring points each was used to record conductivity distributions downstream of a T-junction.

Journal ArticleDOI
TL;DR: In this article, a detailed review of information relevant to radiocontaminant transport in (V)HTR primary systems paying particular attention to chemical forms, interactions with dust and overall distribution is presented.

Journal ArticleDOI
TL;DR: In this article, the authors investigated the heat transfer characteristics of steam-water two-phase flow in vertical upward tube and found that dryout is the main mechanism of heat transfer deterioration in the sub-critical pressure region.

Journal ArticleDOI
TL;DR: In this article, a preliminary investigation of sodium flow and temperature distributions in heat generating fuel pin bundles with helical spacer wires has been carried out, where the 3D conservation equations of mass, momentum and energy have been solved using a commercial computational fluid dynamics (CFD) code.

Journal ArticleDOI
TL;DR: In this article, the two-phase hydride U0.3ZrH1.6 fuel was evaluated for performance as a nuclear fuel for LWRs and its transport, mechanical, thermal and chemical properties were summarized.

Journal ArticleDOI
Kyu-Tae Kim1
TL;DR: In this paper, the impact of grid spring designs on the fretting wear rate was examined and three different models were developed to predict the fuel rod perforation times in commercial nuclear power plants.

Journal ArticleDOI
TL;DR: A supercritical water heat transfer test section has been built at Xi'an Jiaotong University to study the heat transfer from a 10mm rod inside a square vertical channel with a wire-wrapped helically around it as a spacer.

Journal ArticleDOI
TL;DR: In this paper, the forced convection heat transfer characteristics of water in a vertically upward internally ribbed tube at supercritical pressures were investigated experimentally, and the effects of heat flux and pressure on heat transfer of supercritical pressure water in the vertically upward internal ribbed tubes were analyzed, and characteristics and mechanisms of heat transfer enhancement, and also that of water transfer deterioration, were also discussed in the so-called large specific heat region.

Journal ArticleDOI
TL;DR: In this paper, a high-order mono-block nonlinearly consistent adaptive time step control is proposed to restore consistency in the coupling of the nonlinear terms in the solution fields.

Journal ArticleDOI
TL;DR: In this paper, numerical simulation of low Reynolds (Re) number turbulence flow phenomena in tightly packed fuel pin subassemblies and in channels of irregular shape such as eccentric annuli is presented.

Journal ArticleDOI
TL;DR: In this article, the authors investigated the course of the partial and total blockage of a channel in the IAEA 10MW MTR pool type research reactor core (IAEA-TECDOC-233, 1980).

Journal ArticleDOI
TL;DR: In this paper, a theoretical model is proposed to estimate the condensation heat transfer at high pressure using the heat and mass transfer analogy, and the model demonstrates the capability to predict the condensate heat transfer coefficients better than any other correlation.

Journal ArticleDOI
TL;DR: The reactor shutdown task and alarm reset task simulations were conducted in this study to evaluate operators’ mental workload and performance and indicated that for ensuring safe operating in NPPs, the design of automation needs to be carefully implemented.

Journal ArticleDOI
TL;DR: In this paper, the authors present the current understanding, mainly based on SOPHAEROS equilibrium chemistry calculations of Phebus FP tests performed within the I-RCS technical circle of the SARNET network of excellence in the EU 6th Framework programme.