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Keywords: PIV
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Proceedings Papers

Proc. ASME. ICONE29, Volume 7A: Thermal-Hydraulics and Safety Analysis, V07AT07A051, August 8–12, 2022
Paper No: ICONE29-91739
... with Reynolds number and channel wall impact. The study aimed to provide relevant reference basis to compare and analyze similar scenario under unsteady flow condition. PIV flow blockage turbulent flow rod bundle sub-channel blockage Proceedings of the 2022 29th International Conference on Nuclear...
Proceedings Papers

Proc. ASME. ICONE28, Volume 2: Nuclear Fuels, Research, and Fuel Cycle; Nuclear Codes and Standards; Thermal-Hydraulics, V002T05A012, August 4–6, 2021
Paper No: ICONE28-64684
... Image whether the reactor can operate safely. However, the size of Velocimetry (PIV) technology and the Laser Induced the plate fuel assembly is usually 1-3mm, which is prone to Fluorescence (LIF) technology are used in current paper to blockage accidents[1]. Therefore, it is necessary to carry out...
Proceedings Papers

Proc. ASME. ICONE28, Volume 4: Student Paper Competition, V004T14A070, August 4–6, 2021
Paper No: ICONE28-65498
... Image Velocimetry (PIV) to visualize and measure the flow fields downstream of the blockages. The results show that partial blockages will cause flow reversal. In the backflow zone, vortices are generated downstream of the blockage, causing increase in the resistance. The length of backflow zone...
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, V003T09A003, August 4–6, 2021
Paper No: ICONE28-64450
... of a three-way branch pipe with one branch closed is established to verify the mechanism. The PIV measurement method is used to obtain the change characteristics of the flow streamline and velocity distribution of the closed branch pipe under different working conditions. Tests have shown that due...
Proceedings Papers

Proc. ASME. ICONE28, Volume 4: Student Paper Competition, V004T14A073, August 4–6, 2021
Paper No: ICONE28-65590
... periodically, and the wave phase is inverse. This study shows that the flow field variation caused by rolling motion is different from that caused by pulsating flow, and the flow field of fuel assembly in floating reactor system under ocean condition is further studied. rod bundle rolling motion PIV...
Proceedings Papers

Proc. ASME. ICONE2020, Volume 3: Student Paper Competition; Thermal-Hydraulics; Verification and Validation, V003T13A046, August 4–5, 2020
Paper No: ICONE2020-16796
... in the reactor vessel was measured by the Particle Image Velocimetry (PIV) method. The PIV measurement was carried out under the operation of the dipped-type direct heat exchanger (DHX) installed in the upper plenum when 20% of the core fuel fell to the lower plenum and accumulated on the core catcher. From...
Proceedings Papers

Proc. ASME. ICONE2020, Volume 3: Student Paper Competition; Thermal-Hydraulics; Verification and Validation, V003T13A037, August 4–5, 2020
Paper No: ICONE2020-16679
... Energy Agency Ibaraki, Japan Akikazu Kurihara Japan Atomic Energy Agency Ibaraki, Japan Katsuji Ishida Ascend Co., Ltd. Ibaraki, Japan Keywords: FBR, Wire Wrapped Pin Bundle, Subchannel, PIV ABSTRACT A sodium-cooled fast reactor is designed to attain a high burn-up core in commercialized fast reactor...
Proceedings Papers

Proc. ASME. ICONE21, Volume 6: Beyond Design Basis Events; Student Paper Competition, V006T16A010, July 29–August 2, 2013
Paper No: ICONE21-15353
... dismantling operations. Keys words : Dismantling, PIV, Temperature Measurement, Filtration, Cutting tools, Incandescent particle INTRODUCTION The use of mechanical or thermal cutting in decommissioning of nuclear facilities generates a lot of incandescent particles. These particles may be capted...
Proceedings Papers

Proc. ASME. ICONE20-POWER2012, Volume 3: Thermal-Hydraulics; Turbines, Generators, and Auxiliaries, 299-308, July 30–August 3, 2012
Paper No: ICONE20-POWER2012-54404
... with the wrapping wire was measured by PIV (Particle Image Velocimetry) through two sides of the duct tube. Typical flow velocity conditions in the pin bundle were 1.6m/s (Re = 13,500) and 0.36m/s (Re = 2,700). Feature of stream regime in the subchannel existing wrapping wire was visualized in vertical...
Topics: Fuels, Wire
Proceedings Papers

Proc. ASME. ICONE18, 18th International Conference on Nuclear Engineering: Volume 2, 913-922, May 17–21, 2010
Paper No: ICONE18-30225
... to be checked with detailed experimental data. This paper describes an experimental database obtained using two-dimensional Time Resolved Particle Image Velocimetry (TR-PIV) measurements within a 5 × 5 rod bundle with spacer-grids. One of the unique characteristic of this set-up is the use of the Matched Index...
Proceedings Papers

Proc. ASME. ICONE18, 18th International Conference on Nuclear Engineering: Volume 3, 311-324, May 17–21, 2010
Paper No: ICONE18-29002
... mode to a lower mode, was observed when the flow rate in the main pipe increased. This phenomenon was examined by high-time-resolved Particle Image Velocimetry (PIV). The instantaneous velocity field in a cross section was visualized two-dimensionally using PIV technique, simultaneously...
Proceedings Papers

Proc. ASME. ICONE17, Volume 4: Codes, Standards, Licensing and Regulatory Issues; Student Paper Competition, 351-360, July 12–16, 2009
Paper No: ICONE17-75214
.... This work presents results showing full field velocity vectors and turbulence statistics for the bundle under single phase flow conditions. PIV index of refraction rod bundle multi-scale benchmark CFD spacer-grid Non-Intrusive Experimental Investigation of Flow Behavior Inside a 5X5 Rod...
Proceedings Papers

Proc. ASME. ICONE14, Volume 4: Computational Fluid Dynamics, Neutronics Methods and Coupled Codes; Student Paper Competition, 493-497, July 17–20, 2006
Paper No: ICONE14-89150
... Particle Image Velocimetry (PIV) measurement technique. The two phase flow condition corresponds to a drag reduction of 38.4% with void fraction of 4.9%. The present results provide evidence that microbubbles in the boundary layer of a turbulent channel flow can help adjust the eddy size distributions near...