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Refurbishment status and future program of Japan Materials Testing Reactor (JMTR)

材料試験炉(JMTR)の改修の現状と将来計画

石原 正博 ; 河村 弘; 新見 素二; 神永 雅紀  ; 堀 直彦 ; 長尾 美春  

Ishihara, Masahiro; Kawamura, Hiroshi; Niimi, Motoji; Kaminaga, Masanori; Hori, Naohiko; Nagao, Yoshiharu

JMTRは、1968年に初臨界を達成した軽水減速タンク型の試験研究炉で、軽水炉の燃料・材料の照射試験や高温ガス炉,核融合炉の開発のための照射試験さらにはRIの製造に利用されてきた。しかしながら、2006年8月にいったん原子炉を停止し、2007年から4年間かけて現在原子炉の改修を行っている。再稼働後、2011年から約20年間の運転を予定しており、利用者の視点から原子炉稼働率の向上,照射費用の低減などの利用性向上にかかわる検討を進めている。本報告では、原子炉機器の更新状況について述べるとともに、JMTRの将来計画について述べる。

The JMTR is a light water cooling tank typed reactor with first criticality in March 1968. The JMTR has been applied to fuel/material irradiation tests for LWRs, HTGR, fusion reactor and RI production. However, the JMTR operation was once stopped at August 2006, and the refurbishment works are now conducting. The reactor facilities will be renewed taking four years from the beginning of FY 2007, and necessary examination and works are carrying out on schedule. The renewed JMTR will be started from FY 2011, and be operated for a period of about 20 years until around FY 2030. The usability improvement of the JMTR, e.g. higher reactor availability-factor, shortening turnaround time to get irradiation results, attractive irradiation cost, business confidence, is also discussing with users as the preparations for re-operation. In the paper, status of the refurbishment of reactor facilities are introduced, moreover the future program using the JMTR will be prescribed.

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