Remote Maintenance Development for ITER

1998 ◽  
Vol 10 (2) ◽  
pp. 71-77
Author(s):  
Eisuke Tada ◽  
◽  
Kiyoshi Shibanuma
Keyword(s):  
Reactor Design ◽  
Full Scale ◽  
Design Concept ◽  
Design Concepts ◽  
Remote Handling ◽  
Remote Maintenance ◽  
Radiation Hard

This paper describes the overall ITER remote maintenance design concept developed mainly for in-vessel components such as diverters and blankets, and outlines the ITER R&D program to develop remote handling equipment and radiation hard components. Reactor structures inside the ITER cryostat must be maintained remotely due to DT operation, making remote handling technology basic to reactor design. The overall maintenance scenario and design concepts have been developed, and maintenance design feasibility, including fabrication and testing of full-scale in-vessel remote maintenance handling equipment and tool, is being verified.

Special Issue on Robotics and Mechatronics for Fusion Experimental Reactor (ITER)

1998 ◽  
Vol 10 (2) ◽  
pp. 69-70
Author(s):  
Eisuke Tada ◽  
Keyword(s):  
Large Scale ◽  
Cutting Tool ◽  
Full Scale ◽  
Tool Development ◽  
Technical Data ◽  
Remote Maintenance ◽  
Scale Models ◽  
Component Development ◽  
And Control ◽  
Radiation Hard

Engineering design activities (EDA) demonstrating the science and technology for the International Thermonuclear Experimental Reactor (ITER), are being conducted based on the four-party international collaboration of Japan (JA), the U.S.A (US), Europe (EU), and Russia (RF). EDA basically concerns engineering design required for ITER construction and technical development confirming design feasibility. In engineering R&D design, the central role is being played by an International Joint Design Team (JCT) consisting of scientists and engineers from the four parties, conducting work on detailed component design, buildings and plant facilities design, safety analysis and evaluation, and comprehensive overall system design. In engineering R&D, whose final objective is to demonstrate engineering technology necessary for ITER construction, a wide variety of technical development ranging from data acquisition on material characteristics to verification of system performance is being conducted through equal participation of the four parties. Because of the importance of principal ITER components, such as superconducting coils, vacuum vessel, in-vessel components such as diverters and blankets, and remote maintenance equipment, a large-scale project has been set up for manufacturing prototypes, including full-scale models, and for demonstrating performance. In-vessel components such as blankets and divertors are exposed radioactivity of 14 MeV neutrons due to DT operation, and therefore must be maintained or replaced remotely. Plansbased on stage-by-stage ITER operation call for shielding blankets to be replaced by blankets for breeding tritium. Diverters require scheduled maintenance and replacement because they are subjected to severe plasma heat and particle loads. For in-vessel components that undergo scheduled maintenance, remote maintenance is an important technical issue that may affect the performance of ITER, so component structures and layout consistent with remote handling receive top priority and will be subjected to remote maintenance demonstration-testing of using full-scale models. Remote ITER maintenance focuses on technologies involving radiation-hard devices designed for a gamma radiation environment, remote operation and metrology and control for precisely handling heavy in-vessel payloads, and welding and cutting and inspection in narrow confines. Thus, use must be made of robot technologies in Japan and a design concept conceived that meets unique ITER needs. Because device handling precision, the working environment, and other factors surpass conventional technical levels, technical data on large-scale tokamaks, experience in handling heavy payloads in industry, and nuclear field environmental resistance must be studied and system development, including technical demonstrations, conducted on a full engineering scale. This is the backer of ITER device design and development. Good prospects exist for developing a large number of remote maintenance equipment satisfying ITER specifications through the development of a new remote maintenance concept that calls for the handling of heavy payloads with high precision, the acquisition of technical data confirming concept feasibility, the development of components having 2 to 3 times higher resistance to radiation than anything available previously, and the development of remote maintenance based tools that cut, weld, and inspect in narrow confines. In final development, steady progress is being made in fabricating, testing, and demonstrating full-scale remote maintenance. This Special Issue summarizes these achievements and provides an overview of the remote maintenance design on in-vessel components, introducing current status and plans on remote maintenance technology in which the Japan Home Teams is engaged in. Topics covered include the following: 1. Remote Maintenance Development for ITER 2. Blanket Remote Maintenance Development 3. Diverter Remote Maintenance Development 4. In-Vessel Metrology and Viewing Development 5. Pipe Welding and Cutting Tool Development 6. Pipe Inspection Tool Development 7. Thick-Plate Welding and Cutting Tool Development 8. Radiation-Hard Component Development 9. Standard Component Development 10. Data Acquisition and Control

scholarly journals Development of Blanket Remote Maintenance System

1998 ◽  
Vol 10 (2) ◽  
pp. 78-87 ◽  
Author(s):  
Satoshi Kakudate ◽  
◽  
Masataka Nakahira ◽  
Kiyoshi Oka ◽  
Kou Taguchi
Keyword(s):  
Gamma Radiation ◽  
Full Scale ◽  
Positioning Accuracy ◽  
Home Team ◽  
Remote Handling ◽  
Maintenance System ◽  
Remote Maintenance ◽  
Critical Technology ◽  
Blanket Maintenance

ITER in-vessel components such as blankets are scheduled maintenance components, including complete shield blanket replacement for breeding blankets. In-vessel components are activated by 14 MeV neutrons, so blanket maintenance requires remote handling equipment and tools able to handle heavy payloads of about 4 tons within a positioning accuracy of 2 mm under intense gamma radiation. To facilitate remote maintenance, blankets are segmented into 730 modules and railmounted vehicle remote maintenance was developed. According to the ITER R&D program, critical technology related to blanket maintenance was developed extensively through joint efforts of the Japan, EU, and U.S. home teams. This paper summarizes current blanket maintenance technology conducted by the Japan Home Team, including development of full-scale remote handling equipment and tools for blanket maintenance.

Measurement and Control System for ITER Remote Maintenance Equipment

1998 ◽  
Vol 10 (2) ◽  
pp. 139-145 ◽  
Author(s):  
Kiyoshi Oka ◽  
◽  
Satoshi Kakudate ◽  
Nobukazu Takeda ◽  
Yuji Takiguchi ◽  
...  
Keyword(s):  
Control System ◽  
Full Scale ◽  
Dead Weight ◽  
Measurement And Control System ◽  
Home Team ◽  
Remote Handling ◽  
Remote Maintenance ◽  
Blanket Maintenance ◽  
And Control ◽  
Measurement And Control

ITER in-vessel components such as blankets and divertors are categorized as scheduled maintenance components because they are subjected to severe plasma heat and particle loads. Blanket maintenance requires remote handling equipment and tools able to handle Heavy payloads of about 4 tons within a 2mm precision tolerance. divertor maintenance requires remote replacement of 60 cassettes with a dead weight of about 25 tons each. In the ITER R&D program, full-scale remote handling equipment for blanket and divertor maintenance has been designed and assembled for demonstration tests. This paper reviews the measurement and control system developed for full-scale remote handling equipment, the Japan Home Team contribution.

scholarly journals Design, Manufacturing and Test of CFRP Front Hood Concepts for a Light-Weight Vehicle

Polymers ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1374
Author(s):  
Paul Bere ◽  
Mircea Dudescu ◽  
Călin Neamțu ◽  
Cătălin Cocian
Keyword(s):  
Automotive Industry ◽  
Design Concept ◽  
Torsional Stiffness ◽  
Material Structure ◽  
Black Metal ◽  
Design Concepts ◽  
Metal Design ◽  
Body Components ◽  
Cost Efficient ◽  
Transversal Stiffness

Composite materials are very often used in the manufacture of lightweight parts in the automotive industry, manufacturing of cost-efficient elements implies proper technology combined with a structural optimization of the material structure. The paper presents the manufacturing process, experimental and numerical analyses of the mechanical behavior for two composite hoods with different design concepts and material layouts as body components of a small electric vehicle. The first model follows the black metal design and the second one is based on the composite design concept. Manufacturing steps and full details regarding the fabrication process are delivered in the paper. Static stiffness and strain values for lateral, longitudinal and torsional loading cases were investigated. The first composite hood is 254 times lighter than a similar steel hood and the second hood concept is 22% lighter than the first one. The improvement in terms of lateral stiffness for composite hoods about a similar steel hood is for the black metal design concept about 80% and 157% for the hood with a sandwich structure and modified backside frame. Transversal stiffness is few times higher for both composite hoods while the torsional stiffness has an increase of 62% compared to a similar steel hood.

scholarly journals Lao Tze and Confucius' philosophies influenced the designs of Kisho Kurokawa and Tadao Ando

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Rudy Trisno ◽  
Fermanto Lianto
Keyword(s):  
Case Studies ◽  
Qualitative Method ◽  
Le Corbusier ◽  
Design Concept ◽  
Japanese Culture ◽  
Design Concepts ◽  
The Times ◽  
Japanese Architecture ◽  
Tadao Ando ◽  
Interesting Area

AbstractJapanese architecture retains the characteristic of appreciating its culture, despite the growing influence of Western architecture. Based on this issue, it is a very interesting area to study to understand the design concepts behind two masterpieces from the world’s architects Kisho Kurokawa and Tadao Ando. This study uses a qualitative method by analyzing theories and case studies in the work of the architects Kisho Kurokawa and Tadao Ando. It conducts the following detailed analyses; (a) Western architects who influenced both design concepts; (b) The primary considerations of the two architects in facing the demands of the times. The study concludes that Kisho Kurokawa was influenced by Kenzo Tange, while Tadao Ando has been influenced by Le Corbusier and Louis Khan. The primary consideration of Kisho Kurokawa is Hanasuki, while for Tadao Ando it is Shintai. The findings in this study are that the two architects in the design concept were inspired by Japanese culture, where Japanese culture is influenced by the philosophy of Lau Tze and Confucius.

Machine Learning-Based Design Concept Evaluation

2020 ◽  
Vol 142 (3) ◽  
Author(s):  
Bradley Camburn ◽  
Yuejun He ◽  
Sujithra Raviselvam ◽  
Jianxi Luo ◽  
Kristin Wood
Keyword(s):  
Machine Learning ◽  
Technology Development ◽  
Empirical Evaluation ◽  
Learning Technologies ◽  
Design Concept ◽  
Third Party ◽  
Large Set ◽  
Design Concepts ◽  
Automated Method ◽  
Concept Evaluation

Abstract In order to develop novel solutions for complex systems and in increasingly competitive markets, it may be advantageous to generate large numbers of design concepts and then to identify the most novel and valuable ideas. However, it can be difficult to process, review, and assess thousands of design concepts. Based on this need, we develop and demonstrate an automated method for design concept assessment. In the method, machine learning technologies are first applied to extract ontological data from design concepts. Then, a filtering strategy and quantitative metrics are introduced that enable creativity rating based on the ontological data. This method is tested empirically. Design concepts are crowd-generated for a variety of actual industry design problems/opportunities. Over 4000 design concepts were generated by humans for assessment. Empirical evaluation assesses: (1) correspondence of the automated ratings with human creativity ratings; (2) whether concepts selected using the method are highly scored by another set of crowd raters; and finally (3) if high scoring designs have a positive correlation or relationship to industrial technology development. The method provides a possible avenue to rate design concepts deterministically. A highlight is that a subset of designs selected automatically out of a large set of candidates was scored higher than a subset selected by humans when evaluated by a set of third-party raters. The results hint at bias in human design concept selection and encourage further study in this topic.

Exploiting Critical Path Method for Evaluation of Conceptual Design

2010 ◽  
Vol 97-101 ◽  
pp. 4429-4432 ◽  
Author(s):  
Mei Yan Wang ◽  
Lian Guan Shen ◽  
Yi Min Deng
Keyword(s):  
Conceptual Design ◽  
Critical Path ◽  
Design Concept ◽  
Design Evaluation ◽  
Critical Path Method ◽  
Design Concepts ◽  
Critical Design ◽  
Concept Evaluation ◽  
Design Requirements

Conceptual design is a critical design phase during which initial design solutions, called design concepts, are developed. These design concepts must be evaluated to ensure they satisfy the specified design requirements and the most appropriate design concept must be selected. It is often difficult for the designer, especially for the novice, to make an appropriate design concept evaluation and selection. Existing work on design evaluation lacks an effective tool for evaluating the temporal performance of the design concepts. To address this problem, a Critical Path Method (CPM) from project management is adapted for design evaluation, whereby a CPM network is converted from a causal behavioral process (CBP) and the methodologies relating to CPM are also applied to design improvement. A case study of a lever-clamp assembly system is also presented to illustrate as well as validate the method.

An I-Ching-TRIZ-Inspired Approach to Design Concept Generation

2009 ◽  
Author(s):  
Duc Truong Pham ◽  
Huimin Liu
Keyword(s):  
Design Concept ◽  
Design Solution ◽  
Concept Generation ◽  
I Ching ◽  
Innovative Design ◽  
New Approach ◽  
Design Concepts ◽  
Aircraft Cabin ◽  
Design Specifications ◽  
Design Solutions

This paper presents a new approach to producing innovative design concepts. The proposed approach involves extending the inventive principles of TRIZ by integrating other TRIZ and TRIZ-inspired tools. The set of inventive principles is then structured according to a framework adapted from I-Ching and represented using TRIZ’s Behaviour-Entity (BE) formalism to which constraints have also been added. The adoption of the BE representation enables a reduction in the amount of repeated information in the inventive principles. A BE pair contains information on a design solution. A Behaviour-Entity-Constraint (BEC) triple additionally has information on constraints on the solution. The BEC representation thus facilitates the retrieval and generation of design solutions from design specifications. The paper uses the problem of laying out seats in an aircraft cabin to illustrate advantages of the proposed approach.

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