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磁気特性に基づく照射損傷評価

Evaluation of neutron irradiation damage based on magnetic properties

高屋 茂  ; 山県 一郎 ; 今野 将太郎; 市川 正一; 小川 竜一郎; 永江 勇二 

Takaya, Shigeru; Yamagata, Ichiro; Konno, Shotaro; Ichikawa, Shoichi; Ogawa, Ryuichiro; Nagae, Yuji

中性子照射した高速炉用SUS316鋼の磁束密度及び磁化曲線をフラックスゲートセンサ及び新たに開発した振動試料型磁力計を用いてそれぞれ測定した。その結果、磁気特性と代表的な照射損傷指標である弾き出し損傷量との間に良い相関があることを明らかにした。この結果は、磁気特性に基づく照射損傷の非破壊評価の可能性を示している。

We measured the magnetic flux densities and the magnetization curves on neutron irradiated fast reactor grade type 316 stainless steels by a flux gate sensor and a newly developed vibrating sample magnetometer, respectively. As the result, it was revealed that there is a good relationship between magnetic property and dose, one of representative irradiation damage parameters. This result shows the possibility of nondestructive evaluation of neutron irradiation damage based on magnetic properties.

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