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原研-サイクル機構融合研究成果報告書; 照射環境における原子炉構造材料の劣化現象に関する研究

JAERI-JNC joint research report; A Study on degradation of structural materials used under the irradiation environment in nuclear reactors

上野 文義; 永江 勇二*; 根本 義之; 三輪 幸夫; 高屋 茂*; 星屋 泰二*; 塚田 隆; 青砥 紀身*; 石井 敏満; 近江 正男; 清水 道雄; 阿部 康弘*; 吉武 庸光*; 中村 保雄*; 山下 卓哉*

Ueno, Fumiyoshi; Nagae, Yuji*; Nemoto, Yoshiyuki; Miwa, Yukio; Takaya, Shigeru*; Hoshiya, Taiji*; Tsukada, Takashi; Aoto, Kazumi*; Ishii, Toshimitsu; Omi, Masao; Shimizu, Michio; Abe, Yasuhiro*; Yoshitake, Tsunemitsu*; Nakamura, Yasuo*; Yamashita, Takuya*

原研とサイクル機構は、平成15年度から研究開発の効率的推進と研究の相乗的発展を目指す「融合研究」を開始した。本研究は、「融合研究」の一つとして、高速炉や軽水炉環境などの照射環境において生じる構造材料の照射劣化現象を対象に、劣化機構の解明,早期検出及び評価方法の開発を目的とした。平成16$$sim$$17年度は、本研究に用いる照射材対応の遠隔操作型の微少腐食量計測装置,腐食試験装置及び漏えい磁束密度測定装置を整備し、SUS304の照射後及び非照射クリープ試験片や照射後高純度モデル材を共通試料とし、両手法を用いた劣化検出を試みるとともに、比較のための非照射劣化模擬試料を用い、基礎的なデータを取得した。これらの結果に基づき、本研究において提案した劣化評価法の適用性を検討した。

JAERI and JNC have started a JAERI-JNC joint research program in fiscal year 2003, which has been aimed for efficient progress and synergistic effect on the research activities in both Institutes. This study has been chosen one of the joint research themes because it has been our common objective in the field of structural materials of FBR and LWR components. The purpose of the study is to clarify damage mechanism of structural materials used under irradiation, and then to develop the methods for damage evaluation and detection in earlier stage of progressing process of damage. In fiscal year 2004 and 2005, micro-corrosion measurement, electrochemical corrosion test and leakage magnetic flux density measurement apparatuses were developed and equipped in two hot facilities and irradiated and unirradiated crept specimens, irradiated high purity model austenitic stainless alloys were also prepared and applied to this study. These apparatuses and specimens were used for damage evaluation, and these feasibilities for nuclear power plant materials were studied.

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