Plasma irradiation experiment on the metal pebble flow in the TPDsheet-U

2021 ◽  
Vol 165 ◽  
pp. 112236
Author(s):  
Takeru Ohgo ◽  
Takuya Goto ◽  
Toshikio Takimoto ◽  
Akira Tonegawa ◽  
Junichi Miyazawa
Keyword(s):  
Plasma Irradiation ◽  
Irradiation Experiment ◽  
Pebble Flow

scholarly journals Quantifying erosion and retention of silicon carbide due to D plasma irradiation in a high-flux linear plasma device

2021 ◽  
Vol 26 ◽  
pp. 100939
Author(s):  
G. Sinclair ◽  
T. Abrams ◽  
S. Bringuier ◽  
D.M. Thomas ◽  
L. Holland ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
High Flux ◽  
Plasma Irradiation ◽  
Plasma Device ◽  
Linear Plasma

scholarly journals Research on the Computed Tomography Pebble Flow Detecting System for HTR-PM

2017 ◽  
Vol 2017 ◽  
pp. 1-13
Author(s):  
Xin Wan ◽  
Ximing Liu ◽  
Jichen Miao ◽  
Peng Cong ◽  
Yuai Zhang ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Three Dimensional ◽  
Helical Ct ◽  
Design Parameters ◽  
Three Dimensional Model ◽  
Safe Operation ◽  
Cross Sectional ◽  
Ct System ◽  
Near Future ◽  
Pebble Flow

Pebble dynamics is important for the safe operation of pebble-bed high temperature gas-cooled reactors and is a complicated problem of great concern. To investigate it more authentically, a computed tomography pebble flow detecting (CT-PFD) system has been constructed, in which a three-dimensional model is simulated according to the ratio of 1 : 5 with the core of HTR-PM. A multislice helical CT is utilized to acquire the reconstructed cross-sectional images of simulated pebbles, among which special tracer pebbles are designed to indicate pebble flow. Tracer pebbles can be recognized from many other background pebbles because of their heavy kernels that can be resolved in CT images. The detecting principle and design parameters of the system were demonstrated by a verification experiment on an existing CT system in this paper. Algorithms to automatically locate the three-dimensional coordinates of tracer pebbles and to rebuild the trajectory of each tracer pebble were presented and verified. The proposed pebble-detecting and tracking technique described in this paper will be implemented in the near future.

Design and first operation of the MACARON irradiation experiment of Sodium Fast reactor absorber pins in the BOR-60 reactor

2021 ◽  
Vol 135 ◽  
pp. 103676
Author(s):  
T. Lambert ◽  
J.M. Escleine ◽  
B. Fontaine ◽  
S. Eremin ◽  
E. Muraleva ◽  
...  
Keyword(s):  
Fast Reactor ◽  
Irradiation Experiment ◽  
Sodium Fast Reactor

scholarly journals Fluence Dependence of Surface Morphology and Deuterium Retention in W Bulks and Nanocrystalline W Films Exposed to Deuterium Plasma

2021 ◽  
Vol 11 (4) ◽  
pp. 1619
Author(s):  
Jing Yan ◽  
Xia Li ◽  
Kaigui Zhu
Keyword(s):  
Surface Morphology ◽  
Thermal Desorption Spectroscopy ◽  
Low Energy ◽  
High Flux ◽  
Deuterium Plasma ◽  
Vacancy Clusters ◽  
Plasma Irradiation ◽  
Deuterium Retention ◽  
Fluence Dependence ◽  
Scanning Electron

The surface morphology of pure W bulks and nanocrystalline tungsten films was investigated after exposure to a low-energy (100 eV/D), high-flux (1.8 × 1021 D·m−2s−1) deuterium plasma. Nanocrystalline tungsten films of 6 μm thickness were deposited on tungsten bulks and exposed to deuterium plasma at various fluences ranging from 1.30 × 1025 to 5.18 × 1025 D·m−2. Changes in surface morphology from before to after irradiation were studied with scanning electron microscopy (SEM). The W bulk exposed to low-fluence plasma (1.30 × 1025 D·m−2) shows blisters. The blisters on the W bulk irradiated to higher-fluence plasma are much larger (~2 µm). The blisters on the surface of W films are smaller in size and lower in density than those of the W bulks. In addition, the modifications exhibit the appearance of cracks below the surface after deuterium plasma irradiation. It is suggested that the blisters are caused by the diffusion and aggregation of the deuterium-vacancy clusters. The deuterium retention of the W bulks and nanocrystalline tungsten films was studied using thermal desorption spectroscopy (TDS). The retention of deuterium in W bulks and W films increases with increasing deuterium plasma fluence when irradiated at 500 K.

scholarly journals Effect of the Plasma Irradiation on the Friction of Carbon Fiber

2013 ◽  
Vol 79 (801) ◽  
pp. 1827-1836
Author(s):  
Daiki SANNOMIYA ◽  
Noritsugu UMEHARA ◽  
Takayuki TOKOROYAMA ◽  
Hiroyuki KOUSAKA
Keyword(s):  
Carbon Fiber ◽  
Plasma Irradiation

Effect of bed configuration on pebble flow uniformity and stagnation in the pebble bed reactor

2014 ◽  
Vol 270 ◽  
pp. 295-301 ◽  
Author(s):  
Nan Gui ◽  
Xingtuan Yang ◽  
Jiyuan Tu ◽  
Shengyao Jiang
Keyword(s):  
Flow Uniformity ◽  
Pebble Bed ◽  
Pebble Bed Reactor ◽  
Pebble Flow

Rapid Growth of Radish Sprouts Using Low Pressure O2Radio Frequency Plasma Irradiation

2012 ◽  
Vol 1469 ◽  
Author(s):  
Satoshi Kitazaki ◽  
Kazunori Koga ◽  
Masaharu Shiratani ◽  
Nobuya Hayashi
Keyword(s):  
Cell Proliferation ◽  
Cell Morphology ◽  
Rapid Growth ◽  
Average Length ◽  
Growth Enhancement ◽  
Radio Frequency Plasma ◽  
Plasma Irradiation ◽  
Frequency Plasma ◽  
Irradiation Cell ◽  
Radish Sprouts

ABSTRACTWe compared growth enhancement of radish induced by O2, air, and Ar plasma irradiation. The average length of radish sprouts cultivated for 4 days after O2plasma irradiation is 70% longer than that of sprouts without irradiation. The O2plasma irradiation is more effective in enhancing growth than air and Ar radio frequency plasma irradiation. Cell morphology and cell size of sprouts with O2plasma irradiation is nearly the same as those without irradiation. These results suggest that plasma induced acceleration of cell proliferation brings about the rapid growth.

scholarly journals Torques Induced by Scattered Pebble-flow in Protoplanetary Disks

2018 ◽  
Vol 855 (2) ◽  
pp. L28 ◽  
Author(s):  
Pablo Benítez-Llambay ◽  
Martin E. Pessah
Keyword(s):  
Protoplanetary Disks ◽  
Pebble Flow
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