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.

Development of Divertor Remote Maintenance System

1998 ◽  
Vol 10 (2) ◽  
pp. 88-95 ◽  
Author(s):  
Nobukazu Takeda ◽  
◽  
Kiyoshi Oka ◽  
Kentaro Akou ◽  
Yuji Takiguchi
Keyword(s):  
Gamma Radiation ◽  
Technology Development ◽  
Extreme Heat ◽  
Radial Transport ◽  
Home Team ◽  
Remote Handling ◽  
Maintenance System ◽  
Remote Maintenance ◽  
The Status

The ITER divertor is categorized as a scheduled maintenance component because of extreme heat and particle loads it is exposed to by plasma. It is also highly activated by 14 MeV neutrons. Reliable remote handling equipment and tools are required for divertor maintenance under intense gamma radiation. To facilitate remote maintenance, the divertor is segmented into 60 cassettes, and each cassette weighing about 25 tons and maintained and replaced through four maintenance ports each 90 degrees. divertor cassettes must be transported toroidally and radially for replacement through maintenance ports. Remote handling involving cassette movers and carriers for toroidal and radial transport has been developed. Under the ITER R&D program, technology critical to divertor cassette maintenance is being developed jointly by Japan, E.U., and U.5. home teams. This paper summarizes divertor remote maintenance design and the status of technology development by the Japan Home Team.

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.

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.

scholarly journals Development of Radiation Hardness Components for ITER Remote Maintenance

1998 ◽  
Vol 10 (2) ◽  
pp. 121-132 ◽  
Author(s):  
Kenjiro Obara ◽  
◽  
Satoshi Kakudate ◽  
Kiyoshi Oka ◽  
Akira Ito ◽  
...  
Keyword(s):  
Quality Improvement ◽  
Gamma Ray ◽  
New Products ◽  
Radiation Hardness ◽  
Radiation Doses ◽  
High Radiation ◽  
Home Team ◽  
Remote Handling ◽  
Remote Maintenance ◽  
Component Development

In the ITER, in-vessel remote handling is required to assemble and maintain in-vessel components in DT operations. Since in-vessel remote handling systems must operate under intense gamma ray radiation exceeding 30 kGy/h, their components must have sufficiently high radiation hardness to allow maintenance long enough in ITER in-vessel environments. Thus, extensive radiation tests and quality improvement, including optimization of material compositions, have been conducted through the ITER R&D program to develop radiation hardness components that meet radiation doses from 10 to 100 MGy at 10 kGy/h. This paper presents the latest on radiation hardness component development conducted by the Japan Home Team as a contribution to the ITER. The remote handling components tested are categorized for use in robotic or viewing systems, or as common components. Radiation tests have been conducted on commercially available products for screening, on modified products, and on new products to improve the radiation hardness.

Engineering Design and Analysis of the CFETR Divertor Remote Maintenance System

2020 ◽  
Vol 48 (6) ◽  
pp. 1637-1640
Author(s):  
W. L. Zhao ◽  
Y. Li ◽  
K. Lu ◽  
Y. Cheng ◽  
X. Gao ◽  
...  
Keyword(s):  
Engineering Design ◽  
Maintenance System ◽  
Remote Maintenance

Conceptual Design of an In-Vessel Remote Maintenance System for Basic Fusion Experimental Device

1991 ◽  
Vol 19 (3P2B) ◽  
pp. 1823-1827
Author(s):  
J. Q. Ling ◽  
W. D. Booth ◽  
R. Carrera ◽  
D. Tesar
Keyword(s):  
Conceptual Design ◽  
Experimental Device ◽  
Maintenance System ◽  
Remote Maintenance
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