Study on assembly techniques and procedures for ITER tokamak device

Obara, Kenjiro; Kakudate, Satoshi; Shibanuma, Kiyoshi; Sago, Hiromi*; Ue, Koichi*; Shimizu, Katsusuke*; Onozuka, Masanori*

JAEA-Technology 2006-034, 85 Pages, 2006/06

JAEA-Technology-2006-034.pdf:9.18MB

The International Thermonuclear Experimental Reactor (ITER) tokamak is composed of many kinds of components. The dimensions and weight of the respective components are around a few ten-meters and several hundred-tons. In addition, the whole tokamak assembly, which are composed of these components, are roughly estimated, 26 m in diameter, 18 m in height and over 16,500 tons in total weight. On the other hand, as for positioning and assembly tolerances of these components are required to be a high accuracy of 3mm in spite of large size and heavy weight. The assembly procedures and techniques of the ITER tokamak are therefore studied, taking account of the tolerance requirements. Based on the above background, the assembly procedures and techniques, which are able to assemble the tokamak with high accuracy, are described in the present report. The following newly developed tokamak assembly procedures and techniques, jigs and tools for assembly and metrology concept based on the available knowledge and experiences of the installation of the large components, in order to improve the IT (International Team) design toward the more realistic one. As a result, we show the realistic tokamak assembly procedures and techniques to be able to assemble the large and heavy ITER tokamak with high accuracy. (1)Assembly and alignment of the toroidal field coil with high accuracy. (2)Simplification of the assembly procedures, and the jigs/tools and procedures to reduce the misalignment. (3)Assembly procedures and techniques for the vacuum vessel to reduce the weld distortion. (4)Supporting procedures and techniques of the vacuum vessel sector to prevent the toridal field coil from the deformation due to the dead weight of the vacuum vessel sector. (5)Datum points and lines for the required positions and assembly tolerances during tokamak assembly.

Treatment test of supernatant from sewage sludge by irradiation of high energy electron beams under supersaturation with oxygen

Hosono, Masakazu; Arai, Hidehiko; Aizawa, Masaki*; Shimooka, Toshio*; Yamamoto, Ichiro*; Shimizu, Ken*; Sugiyama, Masahi*

JAERI-M 93-007, 35 Pages, 1993/02

JAERI-M-93-007.pdf:1.23MB

no abstracts in English

None

Kajima Corporation*; Obayashi Corporation*; Shimizu Corporation*; Taisei Corporation*

PNC TJ1449 92-005, 351 Pages, 1992/02

PNC-TJ1449-92-005.pdf:16.66MB

None

None

Kajima Corporation*; Obayashi Corporation*; Shimizu Corporation*; Taisei Corporation*; Hazama Corporation*

PNC TJ1449 91-004, 493 Pages, 1991/03

PNC-TJ1449-91-004.pdf:8.18MB

None

None

Taisei Corporation*; Shimizu Corporation*; Obayashi Corporation*; Kajima Corporation*

PNC TJ1449 91-005, 256 Pages, 1991/01

PNC-TJ1449-91-005.pdf:10.52MB

None

Design research for geological disposal system

Kajima Corporation*; Taisei Corporation*; Obayashi Corporation*; Shimizu Corporation*; Hazama Corporation*

PNC TJ4449 90-002VOL2, 80 Pages, 1990/03

PNC-TJ4449-90-002VOL2.pdf:6.51MB

None

Shimizu Corporation*

PNC TJ7449 89-001, 756 Pages, 1989/10

PNC-TJ7449-89-001-1.pdf:24.8MB
PNC-TJ7449-89-001-10.pdf:10.34MB
PNC-TJ7449-89-001-2.pdf:9.75MB
PNC-TJ7449-89-001-3.pdf:90.6MB
PNC-TJ7449-89-001-4.pdf:111.02MB
PNC-TJ7449-89-001-5.pdf:88.2MB
PNC-TJ7449-89-001-6.pdf:70.67MB
PNC-TJ7449-89-001-7.pdf:102.89MB
PNC-TJ7449-89-001-8.pdf:111.48MB
PNC-TJ7449-89-001-9.pdf:65.54MB

None

None

Shimizu Corporation*

JNC TJ1400 2005-016, 106 Pages, 1987/08

JNC-TJ1400-2005-016.pdf:3.81MB

Reduction of effective sputtering yield by honeycomb structures

; ; Nakamura, H.; ; ; ; ;

Journal of Nuclear Science and Technology, 15(7), p.471 - 475, 1978/07

https://doi.org/10.3327/jnst.15.471

no abstracts in English

Radiation detection using boron nanobelts

Kirihara, Kazuhiro*; Kawaguchi, Kenji*; Shimizu, Yoshiki*; Sasaki, Takeshi*; Koshizaki, Naoto*; Kimura, Kaoru*; Yamada, Yoichi; Yamamoto, Hiroyuki; Shamoto, Shinichi

no journal, , 

We discuss the effects of neutron and -ray irradiation on electrical transport of single-crystalline boron nanobelts toward a nano-scale radiation sensor device. Changes of electrical conductance of individual nanobelt before and after thermal neutron irradiation with low (10 cm s) or high (310 cm s) flux are presented.