Research and development of remote maintenance equipment for ITER divertor maintenance

Takeda, Nobukazu; Kakudate, Satoshi; Nakahira, Masataka

JAERI-Tech 2004-071, 85 Pages, 2005/02

JAERI-Tech-2004-071.pdf:4.81MB

To facilitate easy maintainability, the ITER divertor is divided into 60 cassettes, which are transported for replacement using the remote equipments. The cassette of 25 tons has to be transported and installed with a positioning accuracy less than 2 mm in the limited space under the intense gamma radiation field. Based on these requirements, the following design and tests were performed. (1) Link mechanism was studied to apply to the transportation. A compact mechanism with links is designed through the optimization of the link angle taking account of space requirement and force efficiency. The lifting capacity of 30 tons has been demonstrated. (2) Compact link mechanism was also studied to apply for locking of the cassette. The final positioning accuracy of 0.03 mm for installation from the initial positioning error of 5 mm has been demonstrated. (3) Sensor-based control of the remote equipment was tested using simple sensors. It is found that the positioning accuracy of 0.16 mm has been achieved and this value is sufficient.

Multi-dimensional design window search system using neural networks in reactor core design

Kugo, Teruhiko; Nakakawa, Masayuki

JAERI-Data/Code 2000-004, p.97 - 0, 2000/02

JAERI-Data-Code-2000-004.pdf:10.51MB

no abstracts in English

Real-time nuclear power plant monitoring with hybrid artificial intelligence system

Nabeshima, Kunihiko; Suzuki, Katsuo; E.Tuerkcan*

Proc. of 9th Power Plant Dynamics, Control & Testing Symp., Vol. 1, 0, p.51.01 - 51.09, 1995/00

no abstracts in English

Development of core thermal-hydraulics module for intelligent reactor design system (IRDS)

Kugo, Teruhiko; Fujii, Sadao*; Nakakawa, Masayuki

JAERI-Data/Code 94-001, 187 Pages, 1994/08

JAERI-Data-Code-94-001.pdf:7.51MB

no abstracts in English