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「ふげん」第2回圧力管監視試験の健全性評価

Integrity evaluations for the 2nd Fugen pressure tube surveillance test

小池 通崇; 秋山 隆; 石川 敬二; 永松 健次; 新沢 達也; 柴原 格

not registered; not registered; not registered; not registered; not registered; Shibahara, Itaru

「ふげん」第2回取り出し圧力管材料監視試験片(照射期間8年、高速中性子照射量 5.6$$times$$1021n/CM2(E 1MeV))の結果について健全性評価を行った。試験項目は、引張、曲げ、腐食及び水素分析である。照射後試験データにより圧力管材料の延性及び脆性上の評価を行った結果、健全であることがわかった。また、腐食による材料の減肉量及び材料への水素吸収量も設計値よりも小さく、良好な結果が得られている。

Integrity evaluations have been performed for the 2nd Fugen pressure tube test (8 years irradiation, 5.6 $$times$$ 10$$^{21}$$n/cm$$^{2}$$ (E$$>$$1Mev)). Test items mainly consist of tensile test, bending test, corrosion test and hydrogen analysis. It has become clear using these data that the pressure tube material has maintained its integrity during the irradiation by the integrity assessment on both tensile and fracture toughness properties. Besides, both thickness loss by corrosion and absorbed hydrogen content were lower than those of design values.

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