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照射損傷評価のための磁束密度測定手法の改良

Improvement of magnetic flux density measurement technique for irradiation damage evaluation

今野 将太郎; 高屋 茂  ; 永江 勇二 ; 山県 一郎 ; 小川 竜一郎; 赤坂 尚昭; 西野入 賢治

Konno, Shotaro; Takaya, Shigeru; Nagae, Yuji; Yamagata, Ichiro; Ogawa, Ryuichiro; Akasaka, Naoaki; Nishinoiri, Kenji

磁束密度変化に基づく原子炉構造材料の照射損傷評価のために、対象物の表面に接触させるだけで局所的な着磁が可能な点状着磁器を新たに開発し、磁束密度測定手法の改良を行った。これにより、強磁性体を含め、適確に材料の磁気特性を把握することができ、かつ従来の着磁方法に比べ実機への適用の道すじを立てた。

We are developing a method for evaluation of irradiation damage of structural materials in nuclear plants by using change in magnetic flux density due to irradiation damage. In this study, the magnetic flux density measurement technique has been improved by introducing a new magnetizer which enables local magnetizing by contacting the sample surface. We can magnetize samples, especially ferromagnetic samples, more precisely compared to the existing method. Furthermore, the new method provided the path for the application to real plants.

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