Raw wafer material control to eliminate low yield

1999 ◽  
Author(s):  
Cheng-Fu Hsu ◽  
W. C. Chang ◽  
Wei-Kun Yeh ◽  
Steve Lin
Keyword(s):  
Material Control

Maintenance Material Control

2015 ◽  
pp. 115-130
Author(s):  
Salih O. Duffuaa ◽  
A. Raouf
Keyword(s):  
Material Control

Computer-Aided Manufacturing in Small Shipyards: A U.S. and U.K. Comparative Study

1995 ◽  
Vol 11 (02) ◽  
pp. 81-89
Author(s):  
Richard Lee Storch ◽  
William Hills
Keyword(s):  
Production Management ◽  
The United States ◽  
Computer Integrated Manufacturing ◽  
Management Planning ◽  
Material Control ◽  
The United Kingdom ◽  
The World ◽  
Critical Issues ◽  
Production Cost Control ◽  
Current Systems

Shipbuilders throughout the world are continuing to move toward computer-integrated manufacturing (CIM) systems as a means of improving productivity, quality and competitiveness. Implementation of such systems provides unique challenges to all shipbuilders. One of the critical issues involves the choice of new versus existing computer systems (hardware and software), the pace of change, and the timing of implementation of new parts or totally new systems. These challenges and potential solutions are not only different for each shipyard, but are also significantly different for large and small shipyards. Surveys of current uses and needs of small shipyards in the United States and the United Kingdom were conducted to evaluate current systems and to make recommendations for potentially successful approaches to future implementation. The focus was on three major areas: design (design, drafting, engineering, and lofting); production management (planning, estimating, material control, scheduling, purchasing, production/cost control, and quality control); and administration (payroll, time charging, and billing). Based on this work, recommendations concerning systems for implementation and a framework for integration are presented.

scholarly journals Landslide Material Control on Tsunami Genesis—The Storegga Slide and Tsunami (8,100 Years BP)

2019 ◽  
Vol 124 (6) ◽  
pp. 3607-3627 ◽  
Author(s):  
Jihwan Kim ◽  
Finn Løvholt ◽  
Dieter Issler ◽  
Carl Fredrik Forsberg
Keyword(s):  
Material Control ◽  
Storegga Slide

Muon Tomography for Measuring Amount of Nuclear Materials in Fuel Debris

2018 ◽  
Author(s):  
Tsukasa Sugita ◽  
Haruo Miyadera ◽  
Kenichi Yoshioka ◽  
Naoto Kume
Keyword(s):  
Nuclear Power ◽  
Cosmic Ray ◽  
Nuclear Material ◽  
Nuclear Materials ◽  
Material Control ◽  
Nuclear Disaster ◽  
Muon Tomography ◽  
Debris Removal ◽  
Fukushima Daiichi ◽  
Near Future

A method to measure an amount of nuclear materials in fuel debris by using muon tomography has being developed for proceeding with decommissioning of Fukushima Daiichi nuclear power plant. As a result of the Fukushima Daiichi nuclear disaster, the molten fuels were mixed with reactor structures and accumulated as fuel debris in the reactor buildings. There is still a large amount of fuel debris remained in each reactor. Fuel debris removal is planned in the near future and the debris will be taken out in this process. The debris need to be inspected from a viewpoint of nuclear material control. Since the debris is a mixture of fuel and other structures, it is hard to quantitate nuclear materials in debris by existing measurement method. Muons are cosmic-ray particles which have high energies, therefore, they are highly penetrative. This feature makes muon tomography sensitive to find heavy materials such as uranium or plutonium. We conducted a simulation study of applying muon tomography to measure fuel debris by using a Monte-Carlo method. A simulation model which includes muon detectors, shielding container and fuel debris was constructed to reproduce a measurement situation at the site. In conclusion, muon tomography quantitate the nuclear materials, therefore, this method should be useful for the fuel debris removal of Fukushima Daiichi reactors.

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