ITERトロイダルコイルのカバープレートの溶接変形検討と設計提案

Material type: 文書・図像類

Author: 大森順次ほか

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Publication date: 2009-09

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Note (General)：: In the winding pack (WP) of the ITER TF coil, cover plates (CPs) are welded to radial plate (RP) after placing the conductors into the RP groove to fi...

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Summary, etc.：: In the winding pack (WP) of the ITER TF coil, cover plates (CPs) are welded to radial plate (RP) after placing the conductors into the RP groove to fi...

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Material Type: 文書・図像類
Title: ITERトロイダルコイルのカバープレートの溶接変形検討と設計提案
Author/Editor: 大森順次
小泉徳潔
清水辰也
奥野清
長谷川満
Author Heading: 大森順次
小泉徳潔
清水辰也
奥野清
長谷川満
Publication Date: 2009-09
Publication Date (W3CDTF): 2009-09
Alternative Title: Analytical study of cover plate welding deformation of the radial plate of the ITER toroidal field coil
Periodical title: JAEA-Technology 2009-046
Text Language Code: eng
Target Audience: 一般
Note (General): In the winding pack (WP) of the ITER TF coil, cover plates (CPs) are welded to radial plate (RP) after placing the conductors into the RP groove to fix it. The dimensions of the RP are 15 m high and 9 m wide, while its required tolerances are very severe such as flatness of 2 mm and in-plane deformation of about 2.5 mm. It is therefore necessary to reduce the deformation of the RP by CP welding. In order to estimate the weld deformation, a 1 m RP mock-up was fabricated and weld deformations were measured. From the test results, inherent strains have been obtained and the weld deformations of the full scale RP have been estimated. The RP deformations could be within the tolerances by the CP welding thickness of 2.5 mm in inboard region and 1.0 mm in outboard region. In addition, an alternative design, which improve the fabricability of the WP, was proposed. The analyses for the alternative design is performed and the results show the deformations could be reduced more.
ITERのトロイダル磁場(TF)コイルの巻線では、ラジアルプレート(RP)と呼ばれる構造物に、導体を埋め込む構造を採用している。RPに導体を収めた後、カバープレート(CP)をRPに溶接する。RPの大きさは、高さ15m,幅9mであるのに対して、その製作公差は平面度で2mm,面内変形で約2.5mmと極めて厳しいため、CP溶接によるRPの変形を極力小さくする必要がある。そこで、この溶接変形を予測するため、長さ1mのモックアップを製作し、溶接変形を測定し、この測定結果から固有ひずみを求め、実機の溶接変形を解析した。その結果、CPの溶接深さをコイルのインボード側で2.5mm,アウトボード側で1mmとすることで、RPの変形を許容値内にできることがわかった。加えてTFコイルと巻き線の製作性を改善し、さらに溶接変形量を低減できる代替構造を検討し、これに対し解析を実施して、溶接変形をさらに低減できることを示した。
Source: /JAEA-Technology-2009-046.pdf （fulltext）
https://jopss.jaea.go.jp/pdfdata/JAEA-Technology-2009-046.pdf
Access Restrictions: 限定公開
Data Provider (Database): 国立情報学研究所 : 学術機関リポジトリデータベース（IRDB）（機関リポジトリ）
https://irdb.nii.ac.jp
Original Data Provider (Database): 日本原子力研究開発機構 : JOPSS:JAEA Originated Papers Searching System