Long-term high-temperature operation of the HTTR
HTTRにおける長期高温運転
後藤 実 ; 篠原 正憲 ; 栃尾 大輔 ; 島崎 洋祐 ; 濱本 真平 ; 橘 幸男
Goto, Minoru; Shinohara, Masanori; Tochio, Daisuke; Shimazaki, Yosuke; Hamamoto, Shimpei; Tachibana, Yukio
HTTRにおいて、定格運転モードによる30日間、及び高温試験運転モードによる50日間の長期高温運転を行い特性データを取得した。それらのデータを用いて、(1)HTTRの被覆燃料粒子のFP閉じこめ性能は世界最高性能であること,(2)炉内の測定温度は設計値と一致し炉内構造物の強度が保持されていること,(3)中間熱交換器は優れた熱交換性能を運転当初から保持していること,(4)HTTRの反応度制御における棒状可燃性毒物の有効性、及び(5)HTTRの炉心燃焼計算手法の妥当性を検証した。
30-days operation in rated operation mode and 50-days operation in high-temperature operation mode were performed to obtain various characteristic data of HTGR. The main test results are as follows:(1) Coated fuel particle (CFP) of the HTTR has excellent confinement ability of fission product which is the highest performance in the world, (2) The measurement temperature of the core internals is good agreement with the design value so that their structural integrity is maintained, and (3) The intermediate heat exchanger keeps excellent heat transfer performance from beginning of operation. Additionally, the following two issues were validated using the HTTR burnup data. (1) The effectiveness of rod-type burnable poisons on reactivity control in the HTTR, and (2) The whole core burnup calculation method for nuclear characteristics of the HTTR.