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HTTR(高温工学試験研究炉)の試験・運転と技術開発; 2008年度

Operation, test, research and development of the High Temperature Engineering Test Reactor (HTTR); FY2008

高温工学試験研究炉部

Department of HTTR

日本原子力研究開発機構大洗研究開発センターのHTTR(高温工学試験研究炉)は熱出力30MWの黒鉛減速ヘリウムガス冷却型原子炉で、我が国初の高温ガス炉である。平成20年度は、次年度予定されている熱出力30MWの高温試験運転モードでの連続50日運転に先立ち、第4回施設定期検査受検のため運転を実施する予定であったが、スタンドパイプ固定装置の二重シールリングからの漏えいにより施設定期検査のための運転を延期した。一方、機器の製造,工事等については原子炉保護設備の改造,第2次燃料の搬入・貯蔵作業が終了するとともに、各種点検作業を進めた。本報告書は、平成20年度(2008年)のHTTRの運転と保守及び各種技術開発の状況等について紹介する。

The High Temperature Engineering Test Reactor (HTTR) constructed at the Oarai Research and Development Center of the Japan Atomic Energy Agency (JAEA) is the first high-temperature gas-cooled reactor (HTGR) in Japan. The HTTR is a graphite-moderated and helium gas-cooled reactor with 30MW of thermal power. In fiscal year 2008, a operation for periodical inspections was planned. However, the operation was postponed because of small leakage at stand-pipe closure. For maintenance work, a reactor protection system was modified for new safety demonstration tests. Assembling and storage of secondary fuel were performed. Other maintenance works were also carried out. This report summarizes activities and results of HTTR operation, maintenance, and several R&Ds, which were carried out in the fiscal year 2008.

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