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- Material Type
- 規格・テクニカルリポート類
- Author/Editor
- 林 光二柴田 晃岩松 重美相沢 静男高田 文樹近江 正男中川 哲也
- Publication Date
- 2008-03
- Publication Date (W3CDTF)
- 2008
- Alternative Title
- Technology development on production of test specimens from irradiated capsule outer-tube and mechanical evaluation test of stainless steel with high dose carried out by the technology
- Periodical title
- JAEA-Technology 2008-016
- Target Audience
- 一般
- Note (General)
- 出版タイプ： NA本報告は、原子炉構造材料並びに照射用キャプセル材料として用いるステンレス鋼SUS304の高照射量下での強度評価のための試料製作技術の開発と開発した技術を適用した強度試験結果をまとめたものである。SUS304製の照射用バスケットキャプセル(74M-52J)は、JMTR炉心において通算136サイクル照射され、その外筒管の照射量は最大で3.9$\times$10$^{26}$n/m$^{2}$を達成している。この外筒管を用いて機械的強度試験を行うため、JMTRホットラボのセル内で外筒管から試験片を遠隔操作で簡易に製作する打ち抜き法による製作技術を開発した。打ち抜き法と従来の精密機械加工法との比較試験により、打ち抜き法は、十分実用化できることを明らかにした。さらに、この方法により試験片を製作し、高照射量、288$^{\circ}$C以下の低温域におけるステンレス鋼の強度評価試験を実施した。その結果、残存伸びは試験温度150$^{\circ}$Cで18\%、試験温度288$^{\circ}$Cで13\%で、このような高線量下でも十分な延性を示すことが明らかとなった。The irradiation capsule 74M-52J was irradiated during total 136 cycles at reactor core of JMTR and the maximum neutron dose reached on 3.9$\times$10$^{26}$n/m$^{2}$ at the capsule outer-tube made of a type 304 stainless steel. In order to produce mechanical test specimens from the outer tube, a punching technique was developed as a simple remote-handling method in a hot-cell. From comparison between the punching and the mechanical cutting methods, it was clarified that the punching technique was applicable to practical use. Moreover, an evaluation test of mechanical properties using specimens sampled from the 74M-52 was performed in-water high temperature condition, less than 288$^{\circ}$C. The result shows that the residual elongation is 18\% at 150$^{\circ}$C and 13\% at 288$^{\circ}$C. It was confirmed that the type 304 stainless steel irradiated up to such high dose shows enough ductility.
- Source
- /JAEA-Technology-2008-016.pdf （fulltext）