scholarly journals Experimental Study and Computational Simulations of Key Pebble Bed Thermo-mechanics Issues for Design and Safety

2014 ◽  
Author(s):  
Akira Tokuhiro ◽  
Gabriel Potirniche ◽  
Joshua Cogliati ◽  
Abderrafi Ougouag
Keyword(s):  
Experimental Study ◽  
Computational Simulations ◽  
Pebble Bed

Experimental study of the helium flow characteristics in pebble-bed under the condition of CFETR's blanket module

2017 ◽  
Vol 100 ◽  
pp. 283-291 ◽  
Author(s):  
Mingjun Wang ◽  
Di Liu ◽  
Yan Xiang ◽  
Shijie Cui ◽  
G.H. Su ◽  
...  
Keyword(s):  
Experimental Study ◽  
Flow Characteristics ◽  
Helium Flow ◽  
Pebble Bed

Experimental study on the vibration behavior of the pebble bed in PB-FHR

2020 ◽  
Vol 139 ◽  
pp. 107193
Author(s):  
Xingwei Chen ◽  
Ye Dai ◽  
Rui Yan ◽  
Mudan Mei ◽  
Jie Zhang ◽  
...  
Keyword(s):  
Experimental Study ◽  
Pebble Bed ◽  
Vibration Behavior

Experimental Study on Gravity Driven Discharging of Quasi-Two-Dimensional Pebble Bed Based on Mathematical Morphology

2020 ◽  
Author(s):  
Yujia Liu ◽  
Sifan Peng ◽  
Nan Gui ◽  
Xingtuan Yang ◽  
Jiyuan Tu ◽  
...  
Keyword(s):  
Experimental Study ◽  
Mathematical Morphology ◽  
High Speed ◽  
Three Dimensional ◽  
Reactor Core ◽  
Engineering Application ◽  
Discharge Process ◽  
Two Dimensional ◽  
Pebble Bed ◽  
Gravity Driven

Abstract The pebbles flow is a fundamental issue for both academic investigation and engineering application in reactor core design and safety analysis. In general, experimental methods including spiral X-ray tomography and refractive index matched scanning technique (RIMS) are applied to obtain the identification of particles’ positions within a three-dimensional pebble bed. However, none of the above methods can perform global bed particles’ position identification in a dynamically discharging pebble bed, and the corresponding experimental equipment is difficult to access due to the complication and high expense. In this research, the experimental study is conducted to observe the gravity driven discharging process in the quasi two-dimensional silos by making use of the high-speed camera and the uniform backlight. A mathematical morphology-based method is applied to the pre-processing of the captured results. After being increased the gray value gradient by the threshold segmentation, the edges of the particles are identified and smoothed by the Sobel algorithm and the morphological opening operation. The particle centroid coordinates are identified according to the Hough circle transformation of the edges. For the whole pebble bed, the self-programmed process has a particle recognition accuracy of more than 99% and a particle centroid position deviation of less than 3%, which can accurately obtain the physical positions of all particles in the entire dynamically discharge process. By analyzing the position evolution of individual particles in consecutive images, velocity field and motion events of particles are observed. The discharging profiles of 5 conditions with different exit are analyzed in this experiment. The results make a contribution to improving the understanding of the mechanism of pebbles flow in nuclear engineering.

Theoretical and experimental study on effective thermal conductivity of pebble bed for fusion blanket

2017 ◽  
Vol 124 ◽  
pp. 792-796 ◽  
Author(s):  
Hongli Chen ◽  
Shuang Wang ◽  
Cheng Jin ◽  
Shuai Wang ◽  
QingQing Xu
Keyword(s):  
Thermal Conductivity ◽  
Experimental Study ◽  
Effective Thermal Conductivity ◽  
Pebble Bed

scholarly journals Experimental study of fluid dynamics in the pebble bed in a radial coolant flow

2016 ◽  
Vol 754 ◽  
pp. 112008 ◽  
Author(s):  
Y V Smorchkova ◽  
A N Varava ◽  
A V Dedov ◽  
A T Komov
Keyword(s):  
Fluid Dynamics ◽  
Experimental Study ◽  
Coolant Flow ◽  
Pebble Bed

Experimental study of flow field characteristics on bed configurations in the pebble bed reactor

2017 ◽  
Vol 102 ◽  
pp. 1-10 ◽  
Author(s):  
Xinlong Jia ◽  
Nan Gui ◽  
Xingtuan Yang ◽  
Jiyuan Tu ◽  
Haijun Jia ◽  
...  
Keyword(s):  
Experimental Study ◽  
Flow Field ◽  
Pebble Bed ◽  
Pebble Bed Reactor ◽  
Flow Field Characteristics

An experimental study of social selection and frequency of interaction in linguistic diversity

2010 ◽  
Vol 11 (1) ◽  
pp. 138-159 ◽  
Author(s):  
Gareth Roberts
Keyword(s):  
Experimental Study ◽  
Significant Role ◽  
Linguistic Diversity ◽  
Social Selection ◽  
Computational Simulations ◽  
Competitive Condition ◽  
Linguistic Cues ◽  
Instant Messenger

Computational simulations have provided evidence that the use of linguistic cues as group markers plays an important role in the development of linguistic diversity shortcite (Nettle & Dunbar, 1997; Nettle, 1999). Other simulations, however, have contradicted these findings (Livingstone & Fyfe, 1999; Livingstone, 2002). Similar disagreements exist in sociolinguistics (e.g. Labov, 1963, 2001; Trudgill, 2004, 2008a; Baxter et al., 2009). This paper describes an experimental study in which participants played an anonymous economic game using an instant-messenger-style program and an artificial ‘alien language’. The competitiveness of the game and the frequency with which players interacted were manipulated. Given frequent enough interaction with team-mates, players were able to use linguistic cues to identify themselves. In the most competitive condition, this led to divergence in the language, which did not occur in other conditions. This suggests that both frequency of interaction and a pressure to use language to mark identity play a significant role in encouraging linguistic divergence over short periods, but that neither is suffi cient on its own.

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