JAPAN ATOMIC INDUSTRIAL FORUM, INC.

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1 March, 2021

Japan Research Reactor No. 3 Resumes Operation

On February 26, the Japan Atomic Energy Agency (JAEA) announced that it had resumed operation of its research reactor—the Japan Research Reactor No. 3 (JRR-3), with a maximum thermal output of 20 MW—in Tokai Village, Ibaraki Prefecture.

In November 2018, after some four years of safety examinations by the Nuclear Regulation Authority (NRA), JAEA obtained approval to make changes to the reactor installation (basic design approval) so as to achieve compatibility with the new regulatory standards. After seismic retrofitting and other work at the building was completed, the operator successfully carried out a periodic inspection. Full-scale operation available to outside users is scheduled to begin at the end of June. JRR-3, built in 1962 as Japan’s first domestic research reactor, contributed to a range of research activities in the incipient period of nuclear power in the country. At its peak in FY08, the number of total use-days (neutron beam test equipment multiplied by the days of operation) reached 5,270. Indus...more
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