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Nakamura, Kinya*; Kato, Tetsuya*; Ogata, Takanari*; Nakajima, Kunihisa; Iwai, Takashi; Arai, Yasuo
Proceedings of International Conference on Fast Reactors and Related Fuel Cycles (FR 2009) (CD-ROM), 12 Pages, 2012/00
The first irradiation campaign of U-Pu-Zr metal fuel in Japan is planned in the experimental fast reactor JOYO. In the fabrication of U-Pu-Zr fuel, two methods were adopted for preparing U-Pu alloy from the oxide; one is the electrochemical reduction and the other is the electrorefining followed by reductive extraction. Injection casting for U-Pu-Zr slug was carried out after adding U and Zr metals to meet the target specifications of the irradiated fuel. Several conditions of Na-bonding process were determined from the results of tests using simulated metal fuel pins. Based on these results, six U-Pu-Zr fuel pins for the irradiation tests are now being fabricated.
Nakamura, Kinya*; Ogata, Takanari*; Kikuchi, Hironobu; Iwai, Takashi; Nakajima, Kunihisa; Kato, Tetsuya*; Arai, Yasuo; Uozumi, Koichi*; Hijikata, Takatoshi*; Koyama, Tadafumi*; et al.
Nihon Genshiryoku Gakkai Wabun Rombunshi, 10(4), p.245 - 256, 2011/12
Sodium-bonded metallic fuel elements were fabricated for the first time in Japan for the irradiation test in the experimental fast test reactor JOYO. U-20Pu-10Zr fuel slugs of 200 mm in length and approximately 5 mm in diameter were fabricated in a small-scale injection casting furnace. Each fuel slug was loaded into the ferritic martenstic stainless steel (PNC-FMS) cladding tube with the sodium thermal bond, thermal insulator and reflector in a helium gas atmosphere glove box. After top-end plug welding to the cladding tube and heat treatment of the welding area, each fuel element was subjected to the sodium bonding process. After the inspection such as element length, gas plenum length and helium-leak tightness, six metallic fuel elements are transported to the JOYO site for the coming irradiation test.
Nakamura, Kinya*; Ogata, Takanari*; Kikuchi, Hironobu; Iwai, Takashi; Nakajima, Kunihisa; Kato, Tetsuya*; Arai, Yasuo; Koyama, Tadafumi*; Itagaki, Wataru; Soga, Tomonori; et al.
Proceedings of International Conference on Toward and Over the Fukushima Daiichi Accident (GLOBAL 2011) (CD-ROM), 8 Pages, 2011/12
CRIEPI and JAEA have fabricated sodium-bonded metallic fuel elements for the first time in Japan as a collaborative research, for use in the irradiation test at the experimental fast test reactor Joyo. The irradiation test aims to assess the irradiation behavior of the fuel and the internal wastage of the stainless-steel cladding by rare-earth fission products at a maximum cladding temperature above 873 K. U-20 wt% Pu-10 wt% Zr alloy fuel slugs of 200 mm length were fabricated in an injection-casting furnace using U metal, U-Pu alloy and Zr metal. Two types of fuel slug were fabricated, i.e., 5.05 mm and 4.95 mm in diameter, and loaded into a ferritic-martensitic stainless-steel cladding tubes, respectively. After top-end-plug welding to the cladding tube, each fuel element was subjected to sodium bonding to fill the annular gap between the fuel slug and the cladding with melted sodium. The fabrication results indicated that the characteristics of the fuel elements were within the required specifications.
Nakamura, Kinya*; Ogata, Takanari*; Kato, Tetsuya*; Nakajima, Kunihisa; Arai, Yasuo
Proceedings of International Conference on Advanced Nuclear Fuel Cycle; Sustainable Options & Industrial Perspectives (Global 2009) (CD-ROM), p.1487 - 1495, 2009/09
The U-Pu-Zr fuel slugs for the irradiation test in JOYO were manufactured in a small-scale injection casting furnace. The U-Pu alloy ingots as starting materials were prepared by means of electrochemical reduction of the dioxides. The U-Pu-Zr fuel slugs manufactured met all the specifications determined based on not only the results of preliminary tests but also the specification of EBR-II driver fuels. The americium to plutonium ratio in the fuel slugs slightly decreased after the injection casting process.
Kato, Tetsuya*; Nakamura, Kinya*; Nakajima, Kunihisa; Iwai, Takashi; Arai, Yasuo
Denryoku Chuo Kenkyusho Hokoku (L05010), 13 Pages, 2006/07
no abstracts in English
Nakamura, Kinya*; Kato, Tetsuya*; Iwai, Takashi; Arai, Yasuo
Denryoku Chuo Kenkyusho Hokoku (L05011), 14 Pages, 2006/07
no abstracts in English
Kato, Tetsuya*; Nakamura, Kinya*; Iwai, Takashi; Arai, Yasuo
no journal, ,
In the pyrometallugical reprocessing of spent metallic fuel, U and Pu are recovered into liquid Cd through molten salt and subsequentry purified by distillation of Cd. In this study, U and Pu in molten salt were extracted into liquid Cd that had contained Li metal as reductant. The product of Cd-U-Pu alloys was heated to distill Cd and then, the obtained U-Pu alloys were supplyed for fabrication test of U-Pu-Zr metallic fuels.
Kato, Tetsuya*; Nakamura, Kinya*; Sakamura, Yoshiharu*; Iwai, Takashi; Arai, Yasuo
no journal, ,
no abstracts in English
Kato, Tetsuya*; Nakamura, Kinya*; Iwai, Takashi; Arai, Yasuo
no journal, ,
no abstracts in English
Yamanishi, Takeshi; Sekiya, Yoshitomo; Sataka, Hiroyuki; Kitagawa, Yoshito*; Kato, Kinya*
no journal, ,
no abstracts in English
Yamanishi, Takeshi; Sekiya, Yoshitomo; Suzuki, Tatsuya; Kitagawa, Yoshito*; Kato, Kinya*; Saito, Ryosuke*
no journal, ,
no abstracts in English
Nakamura, Kinya*; Ogata, Takanari*; Nakajima, Kunihisa; Kato, Tetsuya*; Iwai, Takashi; Arai, Yasuo; Koyama, Tadafumi*; Itagaki, Wataru; Soga, Tomonori
no journal, ,
Irradiation test of metallic fuel at fast test reactor JOYO is planned. By using techniques of casting, fabrication, analysis and inspection, metallic fuel elements were made for the first time in Japan. In this paper, results of fabrication of U-Pu-Zr alloy fuel slug by emit casting method. Using U metal, U-Pu alloy metal and Zr metal as raw materials, fuel slugs were fabricated by emit casting apparatus in argon gas atmosphere glove box. By inspection, it was confirmed that the specifications were satisfied.
Itabashi, Hideharu; Sekiya, Yoshitomo*; Sataka, Hiroyuki; Shimada, Tomohiro*; Kato, Kinya*
no journal, ,
no abstracts in English
Nakamura, Kinya*; Ogata, Takanari*; Nakajima, Kunihisa; Kato, Tetsuya*; Iwai, Takashi; Arai, Yasuo; Koyama, Tadafumi*; Itagaki, Wataru; Soga, Tomonori
no journal, ,
Irradiation test of metallic fuel elements at fast test reactor JOYO is planned. By the development of fabrication technique of casting, structure, analysis and inspection, metallic fuel elements were fabricated. In this paper, the results of fabrication of U-Pu-Zr alloy fuel slugs are reported. The fuel slugs were fabricated using U metal, U-Pu alloy and Zr metal as raw materials by a casting equipment in an argon gas atmosphere glove box. By inspection, it was confirmed that the specifications were satisfied.
Kato, Kinya*; Itabashi, Hideharu; Sataka, Hiroyuki; Jo, Mayumi*
no journal, ,
no abstracts in English
Nakamura, Kinya*; Kato, Tetsuya*; Ogata, Takanari*; Kikuchi, Hironobu; Iwai, Takashi; Arai, Yasuo
no journal, ,
no abstracts in English
