Post-irradiation examination on particle dispersed rock-like oxide fuel

Shirasu, Noriko; Kuramoto, Kenichi*; Yamashita, Toshiyuki; Ichise, Kenichi; Ono, Katsuto; Nihei, Yasuo

Journal of Nuclear Materials, 352(1-3), p.365 - 371, 2006/06

https://doi.org/10.1016/j.jnucmat.2006.03.002

To evaluate irradiation behavior of the ROX fuel, irradiation experiment was carried out using 20% enriched U instead of Pu. Three fuels were prepared; a single phase fuel of YSZ containing UO (U-YSZ), two particle-dispersed fuels of U-YSZ particle in spinel or corundum matrix. The U-YSZ particles were prepared by crashing presintered U-YSZ pellets and by sieving them. These fuels were irradiated in Japan Research Reactor No.3 for 13 cycles, about 300 days. Though many cracks were observed in the pellets by X-ray photographs, significant appearance changes were not observed for all fuel pins. Distribution of typical FPs was analyzed by the scanning over the fuel pin. Non-volatile nuclide remained in the fuel pellet. On the other hand, a part of Cs moved to the gaps between the pellets and to the insulators. Cs and Cs showed different distributions at the plenum. Fuel pellets were taken out from fuel pins without bonding. Spinel decomposition and subsequent restructuring were not observed probably due to low irradiation temperature.

Irradiation effects on yttria-stabilized Zirconia irradiated with neon ions

Hojo, Tomohiro; Aihara, Jun; Hojo, Kiichi; Furuno, Shigemi*; Yamamoto, Hiroyuki; Nitani, Noriko; Yamashita, Toshiyuki; Minato, Kazuo; Sakuma, Takaaki*

Journal of Nuclear Materials, 319, p.81 - 86, 2003/06

https://doi.org/10.1016/S0022-3115(03)00137-5

no abstracts in English

New Fuel ROX: Development of an innovative rock-like oxide fuel for burning plutonium

Yamashita, Toshiyuki

Look Japan, 49(567), P. 24, 2003/06

no abstracts in English

Efforts toward an innovative nuclear fuel "plutonium rock-like oxide fuel"

Yamashita, Toshiyuki

Science & Technology Journal, 11(11), p.54 - 55, 2002/11

About the research activity on plutonium rock-like oxide fuels and their burning in light water reactors, a plain description was given on such items as background, goals, main results, the frame for the research and future perspectives. The note is intended for the general public.

Behavior of rock-like oxide fuels under reactivity initiated accident conditions

Kusagaya, Kazuyuki*; Nakamura, Takehiko; Yoshinaga, Makio; Okonogi, Kazunari*; Uetsuka, Hiroshi

JAERI-Research 2001-010, 44 Pages, 2001/03

JAERI-Research-2001-010.pdf:9.91MB

no abstracts in English

Current status of researches on the plutonium rock-like oxide fuel and its burning in light water reactors

Yamashita, Toshiyuki; Akie, Hiroshi; Nakano, Yoshihiro; Kuramoto, Kenichi; Nitani, Noriko; Nakamura, Takehiko

Progress in Nuclear Energy, 38(3-4), p.327 - 330, 2001/02

https://doi.org/10.1016/S0149-1970(00)00127-X

no abstracts in English

Radiotoxicity hazard of inert matrix fuels after burning minor actinides in light water reactors

Shelley, A.*; Akie, Hiroshi; Takano, Hideki; Sekimoto, Hiroshi*

Progress in Nuclear Energy, 38(3-4), p.439 - 442, 2001/02

https://doi.org/10.1016/S0149-1970(00)00154-2

no abstracts in English

Evaluation on chemical state of irradiated rock-like oxide fuels by nuclear and chemical modeling

Nitani, Noriko; Kuramoto, Kenichi; Yamashita, Toshiyuki; Omichi, Toshihiko*

Progress in Nuclear Energy, 38(3-4), p.435 - 438, 2001/02

https://doi.org/10.1016/S0149-1970(00)00153-0

no abstracts in English

Rock-like oxide fuels for burning excess plutonium in LWRs

Yamashita, Toshiyuki; Kuramoto, Kenichi; Akie, Hiroshi; Nakano, Yoshihiro; Nitani, Noriko; Nakamura, Takehiko; Kusagaya, Kazuyuki*; Omichi, Toshihiko*

Proceedings of Workshop on Advanced Reactors with Innovative Fuels (ARWIF 2001) (CD-ROM), 10 Pages, 2001/00

no abstracts in English

ROX-LWR system for almost complete burning of plutonium

Yamashita, Toshiyuki; Akie, Hiroshi; Kimura, Hideo; Takano, Hideki; Muromura, Tadasumi

IAEA-TECDOC-1122, p.309 - 320, 1999/11

no abstracts in English