537 高温電磁超音波探触子の開発(OS 非破壊評価とモニタリング(2))
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概要
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The in service inspection (ISI) of MONJU fast breeder reactor vessel is performed at elevated temperature (about 200℃). A horizontally polarized shear (SH) wave electromagnetic acoustic transducer (EMAT) is used to perform the volumetric inspection of the MONJU reactor vessel. In this paper, the magnetic flux density distributions of a SH wave EMAT with a so-called Halbach magnet structure is analyzed from room temperature up to 240℃. The relative reduction of the magnetic flux density is less than 15% and the thermal demagnetization is about 5%, respectively. As a result, the Halbach magnet structure can be used at elevated temperatures without large performance reduction as compared to its performance at room temperature. This new structure EMAT is suitable for MONJU reactor vessel ISI.
- 社団法人日本機械学会の論文
- 2004-11-05
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関連論文
- 3513 高速増殖原型炉「もんじゅ」原子炉容器廻りISI検査装置の開発(S49-1 安全,材料,原子炉用機器,S49 原子炉システムおよびその要素技術)
- 技術トピックス エネルギー 原子炉容器検査用電磁超音波探触子(EMAT)の開発
- 537 高温電磁超音波探触子の開発(OS 非破壊評価とモニタリング(2))
- 原子炉容器廻りISI検査装置の開発--高磁場配置型EMATの開発