Development of ITER In-Vessel Viewing and Metrology Systems

1998 ◽  
Vol 10 (2) ◽  
pp. 96-103
Author(s):  
Kenjiro Obara ◽  
◽  
Satoshi Kakudate ◽  
Masataka Nakahira ◽  
Akira Ito
Keyword(s):  
High Temperature ◽  
Gamma Radiation ◽  
Technology Development ◽  
High Vacuum ◽  
Inert Gas ◽  
Design And Technology ◽  
Home Team ◽  
Laser Metrology ◽  
Metrology System ◽  
The U.S

The ITER in-vessel viewing system is vital for detecting and locating damage to in-vessel components such as the blankets and divertors and in monitoring and assisting in-vessel maintenance. This system must be able to operate at high temperature (200°C) under intense gamma radiation (-30 kGy/h) in a high vacuum or I bar inert gas. A periscope viewing system was chosen as a reference due to its clear, wide view and a fiberscope viewing system chosen as a backup for viewing in narrow confines. According to the ITER R&D program, both systems and a metrology system are being developed through the joint efforts of Japan, the U.S., and RF Home Teams. This paper outlines design and technology development mainly on periscope in-vessel viewing and laser metrology contributed by the Japan Home Team.

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.

High Temperature Storage and Gamma Radiation Effects on Mechanical Properties of Stacked Die Package

2014 ◽  
Vol 895 ◽  
pp. 567-570
Author(s):  
Azman Jalar ◽  
Wan Yusmawati Wan Yusoff ◽  
Norinsan Kamil Othman ◽  
Irman Abdul Rahman
Keyword(s):  
High Temperature ◽  
Gamma Radiation ◽  
Radiation Effects ◽  
Storage Period ◽  
Bending Test ◽  
Three Point Bending ◽  
Micromechanical Properties ◽  
3D Ct Scan ◽  
High Temperature Storage ◽  
Temperature Storage

Effect of gamma radiation (1.33 MeV) and high temperature storage of semiconductor package towards micromechanical properties has been investigated. The in-house fabricated Quad Flat No Lead was exposed to gamma radiation with the dose of 5 Gy. Afterwards, high temperature storage was performed at 150 °C for 10, 100 and 1000 hours. Subsequently, the three point bending technique was carried out to obtain the micromechanical properties of semiconductor package. The fracture of the packages caused by three point bending test was subjected to 3D CT scan to capture the image of the fracture. Irradiated package shows the decreasing in their strength with increasing doses of gamma radiation. However, the strength of the package was improved after high temperature storage for 10 hours and decreased as the storage period is extended. Further analysis exhibited that high temperature storage for 10 hours is reveal as good thermal treatment for package in radioactive environment application.

Active figure maintenance control using an optical truss laser metrology system for a space-based far-IR segmented telescope

1992 ◽  
Author(s):  
Kenneth H. Lau ◽  
William G. Breckenridge ◽  
Noble M. Nerheim ◽  
David C. Redding
Keyword(s):  
Laser Metrology ◽  
Metrology System

Siemens Westinghouse Advanced Turbine Systems Program Final Summary

2002 ◽  
Author(s):  
Ihor S. Diakunchak ◽  
Greg R. Gaul ◽  
Gerry McQuiggan ◽  
Leslie R. Southall
Keyword(s):  
High Temperature ◽  
High Efficiency ◽  
Technology Development ◽  
Mechanical Design ◽  
System Development ◽  
Department Of Energy ◽  
Combustion Heat ◽  
Alloy Casting ◽  
Generation Plant ◽  
Power Generation Plant

This paper summarises achievements in the Siemens Westinghouse Advanced Turbine Systems (ATS) Program. The ATS Program, co-funded by the U.S. Department of Energy, Office of Fossil Energy, was a very successful multi-year (from 1992 to 2001) collaborative effort between government, industry and participating universities. The program goals were to develop technologies necessary for achieving significant gains in natural gas-fired power generation plant efficiency, a reduction in emissions, and a decrease in cost of electricity, while maintaining current state-of-the-art electricity generation systems’ reliability, availability, and maintainability levels. Siemens Westinghouse technology development concentrated on the following areas: aerodynamic design, combustion, heat transfer/cooling design, engine mechanical design, advanced alloys, advanced coating systems, and single crystal (SC) alloy casting development. Success was achieved in designing and full scale verification testing of a high pressure high efficiency compressor, airfoil clocking concept verification on a two stage turbine rig test, high temperature bond coat/TBC system development, and demonstrating feasibility of large SC turbine airfoil castings. The ATS program included successful completion of W501G engine development testing. This engine is the first step in the W501ATS engine introduction and incorporates many ATS technologies, such as closed-loop steam cooling, advanced compressor design, advanced sealing and high temperature materials and coatings.

Experiments on High-Temperature Inert Gas Plasma MHD Electrical Power Generation with Hall and Diagonal Connections

2015 ◽  
Vol 193 (3) ◽  
pp. 17-23 ◽  
Author(s):  
Fumihiko Komatsu ◽  
Manabu Tanaka ◽  
Tomoyuki Murakami ◽  
Yoshihiro Okuno
Keyword(s):  
Power Generation ◽  
High Temperature ◽  
Electrical Power Generation ◽  
Electrical Power ◽  
Inert Gas ◽  
Gas Plasma
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