scholarly journals Thick SS316 materials TIG welding development activities towards advanced fusion reactor vacuum vessel applications

2012 ◽  
Vol 390 ◽  
pp. 012063 ◽  
Author(s):  
B Ramesh Kumar ◽  
R Gangradey
Keyword(s):  
Fusion Reactor ◽  
Tig Welding ◽  
Vacuum Vessel

scholarly journals Mobile parallel robot machine for heavy-duty double-walled vacuum vessel assembly

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Changyang Li ◽  
Huapeng Wu ◽  
Harri Eskelinen ◽  
Haibiao Ji
Keyword(s):  
Computer Aided Design ◽  
Fusion Reactor ◽  
Mechanical Design ◽  
Industrial Robot ◽  
Parallel Robot ◽  
Tig Welding ◽  
Inert Gas ◽  
Vacuum Vessel ◽  
Content Type ◽  
Simulation And Optimization

Purpose This paper aims to present a detailed mechanical design of a seven-degrees-of-freedom mobile parallel robot for the tungsten inert gas (TIG) welding and machining processes in fusion reactor. Detailed mechanical design of the robot is presented and both the kinematic and dynamic behaviors are studied. Design/methodology/approach First, the model of the mobile parallel robot was created in computer-aided design (CAD) software, then the simulation and optimization of the robot were completed to meet the design requirements. Then the robot was manufactured and assembled. Finally, the machining and tungsten inert gas (TIG) welding tests were performed for validation. Findings Currently, the implementation of the robot system has been successfully carried out in the laboratory. The excellent performance has indicated that the robot’s mechanical and software designs are suitable for the given tasks. The quality and accuracy of welding and machining has reached the requirements. Originality/value This mobile parallel industrial robot is particularly used in fusion reactor. Furthermore, the structure of the mobile parallel robot can be optimized for different applications.

NG-TIG welding technology research on 1/8 Sector of CFETR vacuum vessel

2020 ◽  
Vol 152 ◽  
pp. 111453 ◽  
Author(s):  
Jianguo Ma ◽  
Jiefeng Wu ◽  
Zhihong Liu ◽  
Haibiao Ji ◽  
Xiaosong Fan
Keyword(s):  
Tig Welding ◽  
Vacuum Vessel ◽  
Technology Research ◽  
Welding Technology

A Study on the Angular Distortion Control for the Multi-Pass Butt Weldment of STS 316LN

2008 ◽  
Vol 580-582 ◽  
pp. 431-434 ◽  
Author(s):  
Ha Geun Kim ◽  
Sang Beom Shin ◽  
Dae Soon Kim
Keyword(s):  
Fusion Reactor ◽  
Control Method ◽  
Prediction Equation ◽  
Angular Distortion ◽  
Vacuum Vessel ◽  
Predictive Equation ◽  
Bending Rigidity ◽  
Distortion Control ◽  
Welded Structure ◽  
Welding Sequence

The purpose of this study is to establish the proper control method of angular distortion of multi-pass STS 316LN weldment in the vacuum and cryostat vessel of the fusion reactor. To achieve it, the predictive equation of angular distortion in the multi-pass STS 316LN weldment with reference to welding heat input and effective bending rigidity of weldment was established using FEA and experiment. The bending restraint degree of each weldment in the the vacuum vessels of the fusion reactor was evaluated using FEA. Based on the prediction equation of distortion, both proper welding deposit sequence of double sided butt weldment of STS 316LN for cryostat vessel and proper welding sequence for the vacuum vessel were established and verified by the measured distortion of actual welded structure.

scholarly journals Integrity Assessment of Weld Joints for Vacuum Vessel of Fusion Reactor

2000 ◽  
Vol 2000 (0) ◽  
pp. 613-614
Author(s):  
Takashi SHIMAKAWA ◽  
Sabrou USAMI ◽  
Koichi KOIZUMI ◽  
Kenzo MIYA ◽  
Hideo KOBAYASHI
Keyword(s):  
Fusion Reactor ◽  
Vacuum Vessel ◽  
Integrity Assessment ◽  
Weld Joints

Large-Scale Rig for the Characterization of DCC at Sub-Atmospheric Pressure

2020 ◽  
Author(s):  
R. Lo Frano ◽  
A. Pesetti ◽  
D. Aquaro ◽  
M. Olcese
Keyword(s):  
Atmospheric Pressure ◽  
Large Scale ◽  
Fusion Reactor ◽  
Scale Up ◽  
Small Scale ◽  
Vacuum Vessel ◽  
Steam Condensation ◽  
Main Components ◽  
Under Construction ◽  
Experimental Rig

Abstract The Direct Contact Condensation (DCC) is the main phenomenon characterizing the steam condensation. It plays an important role for the operation of Vacuum Vessel Pressure Suppression System (VVPSS) tanks, particularly for managing the Ingress of Coolant Event (determining fusion reactor overpressurization). It is safety relevant (key) system of the fusion reactor because by condensing the steam generated during such accident event allows to damp the overpressure. This paper deals with experimental and theoretical analyses of the DCC at sub-atmospheric pressure. The similitude analysis was elaborated to scale up the experimental results obtained in the reduced scale facility: similitude laws are used for the design of large experimental rig. Correlations are defined starting from the water temperature and pressure variation already obtained in the small-scale rig. Furthermore, the experimental rig and its main components accordingly designed (and under construction at the University of Pisa) allow to study at large scale the steam condensation. The testing conditions are presented and discussed.

Parametric neutronic analysis of HCLL blanket for DEMO fusion reactor utilizing vacuum vessel ITER FDR design

2006 ◽  
Vol 81 (19) ◽  
pp. 2213-2220 ◽  
Author(s):  
J. Jordanova ◽  
U. Fischer ◽  
P. Pereslavtsev ◽  
Y. Poitevin ◽  
A. Li Puma ◽  
...  
Keyword(s):  
Fusion Reactor ◽  
Vacuum Vessel

scholarly journals Strength of Through-Wall Electron Beam Welded Joint for Vacuum Vessel of Fusion Reactor.

2001 ◽  
Vol 43 (2) ◽  
pp. 149-159
Author(s):  
Takayuki SUZUKI ◽  
Saburo USAMI ◽  
Takae KIMURA ◽  
Kouichi KOIZUMI ◽  
Masataka NAKAHIRA ◽  
...  
Keyword(s):  
Electron Beam ◽  
Fusion Reactor ◽  
Welded Joint ◽  
Vacuum Vessel

Fabrication Design and Code Requirements for the ITER Vacuum Vessel

2011 ◽  
Author(s):  
H. J. Ahn ◽  
B. C. Kim ◽  
J. W. Sa ◽  
Y. J. Lee ◽  
K. H. Hong ◽  
...  
Keyword(s):  
Arc Welding ◽  
Fusion Reactor ◽  
Electron Beam Welding ◽  
Welding Distortion ◽  
Vacuum Vessel ◽  
Gas Tungsten Arc ◽  
Welded Structure ◽  
Critical Components ◽  
Thick Shells ◽  
Port Structures

The ITER vacuum vessel (VV) is a double walled torus structure and one of the most critical components in the fusion reactor. The design and fabrication of the VV as nuclear equipment shall be consisted with the RCC-MR code based on French fast breeder reactor. The VV is a heavy welded structure with 60 mm thick shells, 40 mm ribs and flexible housing of 275 mm diameter. The welding distortion should be controlled since the total welding length is over 1500 m. To satisfy the design requirement, the electron beam welding (EBW) and narrow gap gas tungsten arc welding (GTAW) techniques are to be applied and developed through the fabrication of mock-ups. The fabrication design has been developed to manufacture the main vessel and port structures in accordance with the RCC-MR code. All fabrication sequences including welding methods are also established to meet the demanding tolerance and inspection requirement by HHI as a supplier.

Sign in / Sign up

Export Citation Format

Share Document