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Keywords: CFD
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Proceedings Papers

Proc. ASME. ICONE29, Volume 4: SMRs, Advanced Reactors, and Fusion, V004T04A003, August 8–12, 2022
Paper No: ICONE29-89323
... affect the safety margin of thermal-hydraulic design: mal-distribution could lead to decrease of core thermal safety margin, which may cause negative effect on the reactor safe operation. Based on three-dimensional computational fluid dynamics (CFD) simulation, the flow distribution result is evaluated...
Proceedings Papers

Proc. ASME. ICONE29, Volume 7B: Thermal-Hydraulics and Safety Analysis, V07BT07A017, August 8–12, 2022
Paper No: ICONE29-92652
... constitutive equations into CFD tool, such as a correlation for interfacial area concentrations, and we evaluated evaporation coefficient, which is an important parameter to determine the phase change rate, based on the physical property of the working fluid. The CFD simulation method was validated using...
Proceedings Papers

Proc. ASME. ICONE29, Volume 8: Computational Fluid Dynamics (CFD) and Applications, V008T08A030, August 8–12, 2022
Paper No: ICONE29-91901
.... The novel numerical model is computationally economical and can ensure the accuracy of the calculation. Numerical simulations in five different working conditions are performed (10 4 < Re < 10 5 ). Comparing the CFD results with the experimental correlation, it is found that the numerical model...
Proceedings Papers

Proc. ASME. ICONE29, Volume 8: Computational Fluid Dynamics (CFD) and Applications, V008T08A059, August 8–12, 2022
Paper No: ICONE29-93259
... in the center of the rod bundle channel, while the bubbles with small diameters tend to appear in the rod bundle walls. two-phase flow rod bundle bubble diameter CFD Proceedings of the 2022 29th International Conference on Nuclear Engineering ICONE29 August 8-12, 2022, Virtual, Online ICONE29-93259...
Proceedings Papers

Proc. ASME. ICONE29, Volume 8: Computational Fluid Dynamics (CFD) and Applications, V008T08A039, August 8–12, 2022
Paper No: ICONE29-92322
... be comprehensively considered in combination with the influences of every individual motion. In addition, through verification, the liquid level measuring can be corrected according to the attitude data and geometric information of pressurizer. marine conditions pressurizer liquid sloshing CFD...
Proceedings Papers

Proc. ASME. ICONE29, Volume 8: Computational Fluid Dynamics (CFD) and Applications, V008T08A017, August 8–12, 2022
Paper No: ICONE29-91637
... Abstract This paper presents the assessment of the computational fluid dynamics (CFD) methodology for simulating the boiling flow in the Pressurized Water Reactor (PWR) rod bundle. The method includes the Eulerian-Eulerian two-fluid model coupled with the improved wall heat partitioning model...
Proceedings Papers

Proc. ASME. ICONE29, Volume 8: Computational Fluid Dynamics (CFD) and Applications, V008T08A064, August 8–12, 2022
Paper No: ICONE29-93457
... will be tested in steady state and relevant transient conditions. The Core Simulator is the electrical heating system and aims to be representative of an ALFRED average fuel assembly (FA). CFD codes are gaining attention for the analysis of complex systems in pool-type reactors, since they are able to reproduce...
Proceedings Papers

Proc. ASME. ICONE29, Volume 8: Computational Fluid Dynamics (CFD) and Applications, V008T08A009, August 8–12, 2022
Paper No: ICONE29-91230
... and provides guidance for similar research in the future. direct vessel injection diversion structure CFD leakage flow rate Proceedings of the 2022 29th International Conference on Nuclear Engineering ICONE29 August 8-12, 2022, Virtual, Online ICONE29-91230 THE OPTIMIZATION DESIGN OF DIRECT VESSEL...
Proceedings Papers

Proc. ASME. ICONE29, Volume 8: Computational Fluid Dynamics (CFD) and Applications, V008T08A035, August 8–12, 2022
Paper No: ICONE29-92225
..., the ratio of pressure drop between internal teeth to pressure drop of the whole throttle tooth increases. The results can provide a reference for the hydraulic design of the rod fuel irradiation facility. flow field CFD coefficient of resistance Proceedings of the 2022 29th International...
Proceedings Papers

Proc. ASME. ICONE29, Volume 8: Computational Fluid Dynamics (CFD) and Applications, V008T08A066, August 8–12, 2022
Paper No: ICONE29-93591
... and the flash evaporation of water may occur, which often induced high pressures. In the present study, a 3D CFD code is applied to investigate the key phenomena of SGTR and the flash evaporation in LBE-water interaction. The experiment of LIFUS test is firstly simulated and validated against the code. The VOF...
Proceedings Papers

Proc. ASME. ICONE29, Volume 5: Nuclear Safety, Security, and Cyber Security, V005T05A031, August 8–12, 2022
Paper No: ICONE29-92104
... be applied to analyze the distribution of other radionuclides. polonium CFD distribution simulation Proceedings of the 2022 29th International Conference on Nuclear Engineering ICONE29 August 8-12, 2022, Virtual, Online ICONE29-92104 PRELIMINARY STUDY ON THE MIGRATION OF POLONIUM-210 IN LEAD...
Proceedings Papers

Proc. ASME. ICONE29, Volume 7A: Thermal-Hydraulics and Safety Analysis, V07AT07A024, August 8–12, 2022
Paper No: ICONE29-90285
... in the deterioration of PRHR capacity. A RELAP5 system model and a CFD model were developed for the PRHR system of NHR-200-II, in both models, we focused on the prediction of thermal stratification phenomena in the ring headers of PRHR. Both the case of normal PRHR scenarios (i.e. the SG branches were successfully...
Proceedings Papers

Proc. ASME. ICONE29, Volume 7A: Thermal-Hydraulics and Safety Analysis, V07AT07A048, August 8–12, 2022
Paper No: ICONE29-91668
... explained the above-mentioned phenomenon. Such findings may provide a reference for the future design of a more reliable pebble bed reactor core. inserted spheres face-centered-cubic pebble bed hot-spots heat transfer characteristics CFD Proceedings of the 2022 29th International Conference...
Topics: Heat transfer
Proceedings Papers

Proc. ASME. ICONE29, Volume 7A: Thermal-Hydraulics and Safety Analysis, V07AT07A073, August 8–12, 2022
Paper No: ICONE29-92224
...% of the magnitude of the axial velocity and a larger heat transfer coefficient, but have little effect on pressure drop. Further, the ribs cause periodic changes in turbulent kinetic energy and heat transfer coefficients. super-critical carbon dioxide CFD ribbed rod Proceedings of the 2022 29th...
Proceedings Papers

Proc. ASME. ICONE29, Volume 7B: Thermal-Hydraulics and Safety Analysis, V07BT07A037, August 8–12, 2022
Paper No: ICONE29-93169
... heat transfer phenomenon under decay heat discharged accident condition. In the present work, the numerical modeling of the experimental device is carried out based on the method of modular modeling and integrated coupling calculation, and the CFD commercial software FLUNET was used for calculation...
Proceedings Papers

Proc. ASME. ICONE29, Volume 4: SMRs, Advanced Reactors, and Fusion, V004T04A026, August 8–12, 2022
Paper No: ICONE29-92284
... the performance of well-designed freeze plugs. advanced reactors MSRs numerical analysis CFD freeze plug heat equation opening time Proceedings of the 2022 29th International Conference on Nuclear Engineering ICONE29 August 8-12, 2022, Virtual, Online ICONE29-92284 NUMERICAL ANALYSIS OF SIMPLE HEAT...
Proceedings Papers

Proc. ASME. ICONE28, Volume 1: Operating Plant Challenges, Successes, and Lessons Learned; Nuclear Plant Engineering; Advanced Reactors and Fusion; Small Modular and Micro-Reactors Technologies and Applications, V001T03A003, August 4–6, 2021
Paper No: ICONE28-64134
...]. On the same time, SAMOFAR in the UE project solidification and melting process. has also developed freeze valve design for MSFR [4], this study is still limited in the computational. The EU researcher develop Keywords: Advanced Reactors, MSR, Safety analysis, CFD, a freeze valve which is different with MSRE...
Proceedings Papers

Proc. ASME. ICONE28, Volume 1: Operating Plant Challenges, Successes, and Lessons Learned; Nuclear Plant Engineering; Advanced Reactors and Fusion; Small Modular and Micro-Reactors Technologies and Applications, V001T04A017, August 4–6, 2021
Paper No: ICONE28-65828
... and the 10 CFD, porous media model MWt High Temperature Reactor (HTR-10) in China, with design outlet temperatures of 950 ºC and 700 oC respectively [2]. * Contact author: jinyongf@mit.edu V001T04A017-1 Copyright © 2021 by ASME Compared to the light water reactors (LWRs), the main Figure 1: Conceptual design...
Proceedings Papers

Proc. ASME. ICONE28, Volume 2: Nuclear Fuels, Research, and Fuel Cycle; Nuclear Codes and Standards; Thermal-Hydraulics, V002T07A005, August 4–6, 2021
Paper No: ICONE28-63380
... for computational fluid GREEK LETTERS dynamics (CFD) code (RV-CFD model) has been developed to thermal diffusivity [m2/s] evaluate the core cooling performance under natural circulation conditions. For the design study, the RV-CFD model is surface permeability demanded to simulate with reasonable calculation...
Proceedings Papers

Proc. ASME. ICONE28, Volume 3: Computational Fluid Dynamics (CFD); Verification and Validation; Advanced Methods of Manufacturing (AMM) for Nuclear Reactors and Components; Decontamination, Decommissioning, and Radioactive Waste Management; Beyond Design Basis and Nuclear Safety; Risk Informed Management and Regulation, V003T08A013, August 4–6, 2021
Paper No: ICONE28-64755
...Abstract Abstract This paper is focused on the applicability of variable-pitch helical wire in a 7-pin SFR test fuel bundle by using CFD method. The differences between the variable-pitch helical wire scheme and the even-pitch helical wire scheme in the pressure loss, velocity, temperature...