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Oral presentation

Neutron irradiation tests of structural materials for nuclear reactors using JRR-3 and WASTEF, 4; Design and fabrication of vertical irradiation capsule

Fuyushima, Takumi; Ushijima, Hiroki; Mitsui, Kento; Endo, Yasuichi; Matsui, Yoshinori; Okada, Yuji; Ha, Yoosung; Hata, Kuniki; Ishijima, Yasuhiro; Nio, Daisuke; et al.

no journal, , 

no abstracts in English

Oral presentation

None

Takeda, Ryoma; Omori, Takazumi; Mitsui, Kento; Takeuchi, Tomoaki; Ushijima, Hiroki; Matsui, Yoshinori; Nio, Daisuke; Endo, Yasuichi; Okada, Yuji; Ide, Hiroshi

no journal, , 

no abstracts in English

Oral presentation

Neutron irradiation tests of structural materials for nuclear reactors using JRR-3 and WASTEF, 5; Post-irradiation examination of irradiated reactor pressure vessel steels

Ha, Yoosung; Hata, Kuniki; Okada, Yuji; Ushijima, Hiroki; Mitsui, Kento; Fuyushima, Takumi; Ishijima, Yasuhiro; Nio, Daisuke; Watanabe, Masaya; Tagami, Susumu; et al.

no journal, , 

no abstracts in English

Oral presentation

Automation of temperature control system for the capsule irradiation of JRR-3

Ushijima, Hiroki; Okada, Yuji; Mitsui, Kento; Nakamura, Takemi; Inoue, Shuichi

no journal, , 

We are renewing the aging equipment of JRR-3 to irradiate capsules with temperature control. The conventional equipment had to be manually adjusted whenever the capsule temperature fluctuates according to the position change of control rod. Hence, the goal of this renewal is to automate the capsule temperature control from before reactor startup to after shutdown. The new system uses vacuum control and heater control. We performed cold tests to check the performance of the equipment. It was found that the device performed satisfactorily by varying the mock capsule to several temperatures. In addition, reactor power values are captured by the new system. The target temperature in conventional equipment was maintained by feedback of changes in capsule temperature. On the other hand, the new equipment starts in conjunction with the reactor power before the capsule temperature changes, so that we expect improved accuracy in temperature maintenance.

Oral presentation

Neutron irradiation tests of structural materials for nuclear reactors using JRR-3 and WASTEF, 1; An Overview of the neutron irradiation test for reactor pressure vessel steels

Hata, Kuniki; Okada, Yuji; Ha, Yoosung; Ushijima, Hiroki; Mitsui, Kento; Fuyushima, Takumi; Ishijima, Yasuhiro; Nio, Daisuke; Watanabe, Masaya; Katsuyama, Jinya

no journal, , 

no abstracts in English

Oral presentation

Neutron irradiation tests of structural materials for nuclear reactors using JRR-3 and WASTEF, 3; Temperature control technology of the JRR-3 vertical irradiation facility

Ushijima, Hiroki; Mitsui, Kento; Fuyushima, Takumi; Okada, Yuji; Endo, Yasuichi; Matsui, Yoshinori; Ha, Yoosung; Hata, Kuniki; Nakamura, Takemi

no journal, , 

no abstracts in English

Oral presentation

Neutron irradiation tests of structural materials for nuclear reactors using JRR-3 and WASTEF, 2; Enhanced performance of the JRR-3 vertical irradiation facility

Mitsui, Kento; Ushijima, Hiroki; Ogasawara, Reira; Okada, Yuji; Suzuki, Makoto; Kimura, Kazuya; Ouchi, Satoshi; Nio, Daisuke; Ishijima, Yasuhiro; Endo, Yasuichi; et al.

no journal, , 

no abstracts in English

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