Coating of Multiparticulates Using Molten Materials

1994 ◽  
pp. 113-142 ◽  
Author(s):  
David Jones ◽  
Phillip Percel
Keyword(s):  
Molten Materials

scholarly journals Multi-Camera Based Setup for Geometrical Measurement of Free-Falling Molten Glass Gob

Sensors ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 1041
Author(s):  
Mazhar Hussain ◽  
Mattias O’Nils ◽  
Jan Lundgren
Keyword(s):  
Free Fall ◽  
Frame Rate ◽  
Geometrical Parameters ◽  
Contactless Method ◽  
Molten Material ◽  
Dynamic Changes ◽  
Direct Measurements ◽  
Molten Materials ◽  
Free Falling

High temperatures complicate the direct measurements needed for continuous characterization of the properties of molten materials such as glass. However, the assumption that geometrical changes when the molten material is in free-fall can be correlated with material characteristics such as viscosity opens the door to a highly accurate contactless method characterizing small dynamic changes. This paper proposes multi-camera setup to achieve accuracy close to the segmentation error associated with the resolution of the images. The experimental setup presented shows that the geometrical parameters can be characterized dynamically through the whole free-fall process at a frame rate of 600 frames per second. The results achieved show the proposed multi-camera setup is suitable for estimating the length of free-falling molten objects.

scholarly journals Development of EXAFS Apparatus for in-situ Measurement of High-Temperature Molten Materials.

1993 ◽  
Vol 32 (6) ◽  
pp. 444-446
Author(s):  
Kazuhiko Omote ◽  
Atsunori Kiku ◽  
Manabu Funahashi ◽  
Kazuyuki Tohji ◽  
Yoshio Waseda
Keyword(s):  
High Temperature ◽  
In Situ Measurement ◽  
Molten Materials

Analysis of Transient Corium Pool Structure in the Lower Plenum of Reactor Vessel

2020 ◽  
Author(s):  
Liang Chen ◽  
Hua Pang ◽  
Ximing Xie ◽  
Lei Zhong ◽  
Rong Cai
Keyword(s):  
Heavy Metal ◽  
Heat Flux ◽  
Nuclear Power ◽  
Metal Layer ◽  
Reactor Vessel ◽  
Loss Of Coolant Accident ◽  
Density Evaluation ◽  
Station Blackout ◽  
Molten Materials ◽  
The Moment

Abstract The transient stratification of the corium in the lower plenum and its impact on the heat flux distribution on the outside of reactor vessel is analyzed in this work. A method for predicting the kinetic corium pool structure is proposed, which takes into account both thermo-chemical equilibrium and density evaluation of the corium. The transient stratification of the corium pool formed after a large loss of coolant accident (LLOCA) and a station blackout (SBO) accident of ACP1000 nuclear power plant in China was analyzed by this method. The transient structure of the corium pool was calculated at the moment when the amount of molten materials in the corium pool increased obviously. The results shown that the formation of a three-layer pool is highly possible when a two-layer pool is formed in the previous moment with a heavy metal layer on the bottom and the density of the heavy metal layer at the bottom is greater than the density of the newly added molten material at the next moment. The heat flux on the outside of the vessel wall faced the thin top metal layer and the vessel failure probability of the vessel here are high if a three-layer pool occurred.

Simulation of the TMI-2 Accident With ATHLET-CD and Analysis of the Late-Phase Modeling

2012 ◽  
Author(s):  
Mathias Hoffmann ◽  
Marco K. Koch
Keyword(s):  
Hydrogen Generation ◽  
Late Phase ◽  
Current Version ◽  
Molten Material ◽  
Plant Behavior ◽  
Accident Data ◽  
Core Components ◽  
Molten Materials ◽  
Two Phases ◽  
Reactor Pressure

This paper provides the results of a simulation of the TMI-2 accident with the current version of ATHLET-CD Mod. 2.2A as part of code validation activities at Ruhr-Universität Bochum (RUB). The calculated plant behavior during the first four phases of the accident is discussed and analyzed in comparison to available post-accident data and measurements. The calculation captures the plant response in terms of the thermal-hydraulics very well during the first two phases. However, during the reflooding of the degraded core some discrepancies between the calculation and TMI-2 data are identified. The code basically underestimates the hydrogen generation in this phase. Moreover, the debris bed and molten pool behavior during this phase cannot be simulated yet. An essential limitation of the current capabilities of the code in terms of the late-phase is the lack of models addressing the relocation of molten materials to the lower plenum of the reactor pressure vessel. Based on this analysis, the next steps needed to model the relocation of molten core components to the lower plenum are identified. These are the lateral leveling of accumulated molten material inside molten pools as well as the slumping to the lower plenum via different paths.

The new meteorite fall of Yanzhuang — A severely shocked H6 chondrite with black molten materials

1994 ◽  
Vol 13 (1) ◽  
pp. 39-46 ◽  
Author(s):  
Xiande Xie ◽  
Zhaohui Li ◽  
Daode Wang ◽  
Jingfa Liu ◽  
Ruiying Hu ◽  
...  
Keyword(s):  
Meteorite Fall ◽  
Molten Materials
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