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Immersion tests of irradiated Zircaloy-2 in artificial seawater

Hayashi, Takehiro; Sasaki, Shinji  ; Mashiko, Shinichi*; Yamagata, Ichiro ; Ogawa, Ryuichiro; Inoue, Masaki ; Yamashita, Shinichiro   

In the Great East Japan Earthquake, the Fukushima Dai-ichi Nuclear Power Plants (1F) were in station blackout and dropped their cooling power. To cool the plants, seawater was poured into 1F buildings included SFP. In this study, the immersion tests were carried out with artificial seawater to evaluate the effect on the strength properties of Zircaloy-2 cladding tubes in seawater. The results indicated the growth of corrosion was not observed in microstructures on the surface of Zircaloy-2 tubes, and there were no significant changes in the tensile properties.

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