HTTR(高温工学試験研究炉)の高温連続運転完遂,5; 運転管理

Completion of long term high temperature operation of HTTR (High Temperature Engineering Test Reactor), 5; Operation and maintenance

清水 厚志 ; 川本 大樹; 栃尾 大輔 ; 本間 史隆; 澤畑 洋明 ; 古澤 孝之 

Shimizu, Atsushi; Kawamoto, Taiki; Tochio, Daisuke; Homma, Fumitaka; Sawahata, Hiroaki; Furusawa, Takayuki

HTTRの高温連続運転に向けて、定格連続運転の実績に基づいて設備・機器等の課題を抽出しその対策を立て改善・改良等を施した。その結果、昼夜にわたる外気の変動等の外乱に対しても、1次冷却材及び2次冷却材の温度,流量,圧力等の変動は少ないこと,プラント全体が本運転中安定して稼動していたことを確認した。このことから、2次ヘリウムガスを安定供給できることを明らかにした。今後の高温ガス炉開発に有用となる高温機器の性能、長期間のヘリウム漏えい率、1次ヘリウム純化設備ガス循環機の性能、1次上部遮へい体の昇温防止性能等、高温ガス炉特有の設備・機器等の運転管理に関する知見を得た。

For the long term high temperature operation with HTTR, issues for systems and components, which were extracted based on result of long term rated operation, were solved. As the result, the followings were confirmed; deviation of temperature, flow rate and pressure of the primary and secondary coolant were sufficiently restricted against the disturbance of temperature of atmosphere during day and night. The whole plant was operated stable. It was confirmed that the secondary coolant was stably supplied. New findings were acquired for the operation and maintenance of systems and components for future HTGR development.