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Development of operation and maintenance technology of HTTR (High Temperature engineering Test Reactor)

HTTR(高温工学試験研究炉)の運転保守技術開発

清水 厚志 ; 川本 大樹; 栃尾 大輔 ; 齋藤 賢司 ; 澤畑 洋明 ; 本間 史隆; 古澤 孝之; 七種 明雄 ; 篠崎 正幸

Shimizu, Atsushi; Kawamoto, Taiki; Tochio, Daisuke; Saito, Kenji; Sawahata, Hiroaki; Homma, Fumitaka; Furusawa, Takayuki; Saikusa, Akio; Shinozaki, Masayuki

HTTRでは、高温ガス炉の技術基盤の確立を目指し、平成22年1月から3月にかけて高温試験運転にて50日間の連続運転を実施した。高温ガス炉の運転管理においては、水素製造システムへの安定した熱供給を行うために、長期運転時のプラントの安定性、機器の信頼性を実証する必要がある。このため、事前に長期運転での技術的課題を抽出し、高温連続運転によりデータを取得し、評価を行った。その結果、高温機器の伝熱性能、ヘリウム漏えい管理、ヘリウム循環機等の動的機器の信頼性、遮へい体の昇温防止性能等、高温ガス炉特有の設備・機器について、長期連続運転での安定性、信頼性を実証した。本高温連続運転により高温ガス炉の運転管理・保守技術の基盤を確立した。

To establish the technical basis of HTGR, the long term high temperature operation using HTTR was carried out during 50-day in 2010. It is necessary to demonstrate the stability of plant during long-term operation and the reliability of components and facilities special to HTGRs, in order to attain the stable supply of the high temperature heat to the planned hydrogen production system of HTTR. Test data obtained in the operation were evaluated for the technical issues which were extracted before the operation. As the results, stability and reliability of the components and facility special to HTGRs was demonstrated by evaluating the heat transfer performance of high temperature components, the helium gas leak tightness, the reliability of the dynamic components such as helium gas circulators, the performance of heat-up protection of radiation shielding. Through the operation, the technical basis for the operation and maintenance technology of HTGRs were established.

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