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Aihara, Jun; Ueta, Shohei; Honda, Masaki*; Kasahara, Seiji; Okamoto, Koji*
JAEA-Research 2024-012, 98 Pages, 2025/02
Concept of Pu-burner high temperature gas-cooled reactor (HTGR) was proposed for the purpose of more safely reducing amount of recovered Pu. In Pu-burner HTGR concept, coated fuel particle (CFP), with ZrC coated yttria stabilized zirconia (YSZ) containing PuO (PuO
-YSZ) small particle and with tri-structural isotropic (TRISO) coating, is employed for very high burn-up and high nuclear proliferation resistance. ZrC layer is oxygen getter. In research project of Pu-burner HTGR carried out from fiscal year of 2014 to fiscal year of 2017, simulated CFPs were fabricated using Ce to simulate Pu. Moreover, simulated fuel compacts were fabricated using fabricated simulated CFPs. In this report, results of microstructural observation of CeO
-YSZ and ZrC layer at each fabrication step are reported.
Aihara, Jun; Goto, Minoru; Ueta, Shohei; Tachibana, Yukio
JAEA-Data/Code 2019-018, 22 Pages, 2020/01
Concept of Pu-burner high temperature gas-cooled reactor (HTGR) was proposed for purpose of more safely reducing amount of recovered Pu. In Pu-burner HTGR concept, coated fuel particle (CFP), with ZrC coated yttria stabilized zirconia (YSZ) containing PuO (PuO
-YSZ) small particle and with tri-structural isotropic (TRISO) coating, is employed for very high burn-up and high nuclear proliferation resistance. ZrC layer is oxygen getter. On the other hand, we have developed Code-B-2.5.2 for prediction of pressure vessel failure probabilities of SiC-tri-isotropic (TRISO) coated fuel particles for HTGRs under operation by modification of an existing code, Code-B-2. The main purpose of modification is preparation of applying code for CFPs of Pu-burner HTGR. In this report, basic formulae are described.
Kato, Masato; Nakamura, Hiroki; Watanabe, Masashi; Matsumoto, Taku; Machida, Masahiko
Defect and Diffusion Forum, 375, p.57 - 70, 2017/05
The basic properties of PuO were reviewed, and the equilibrium defects in PuO
were evaluated from the experimental data of the oxygen potential and electrical conductivity as well as the Ab-initio calculation results. Consistency among various properties was confirmed, and the mechanistic models for thermal property representations were derived.
Nakamichi, Shinya; Hirooka, Shun; Sunaoshi, Takeo*; Kato, Masato; Nelson, A.*; McClellan, K.*
Transactions of the American Nuclear Society, 113(1), p.617 - 618, 2015/10
Cerium dioxide has been used as a surrogate material for plutonium dioxide. Dorr et al reported the use of hyper-stoichiometric conditions causes the start of shrinkage of (U,Ce)O at low temperature compared with the sintering in reducing atmosphere. However, the precise stoichiometry of the samples investigated was not controlled or otherwise monitored, preventing any quantitative conclusions regarding the similarities or differences between (U,Ce)O
and (U,Pu)O
. The motivation for the present work is therefore to compare the sintering behavior of MOX and the (U,Ce)O
MOX surrogates under controlled atmospheres to assess the role of oxygen defects on densification in both systems.
Sakamura, Yoshiharu*; Inoue, Tadashi*; Iwai, Takashi; Moriyama, Hirotake*
Journal of Nuclear Materials, 340(1), p.39 - 51, 2005/04
Times Cited Count:47 Percentile:92.96(Materials Science, Multidisciplinary)A new chlorination method using ZrCl in a molten salt has been investigated for the pyrometallurgical reprocessing of spent oxide fuels. UO
, PuO
and rare earth oxides(La
O
, CeO
, Nd
O
and Y
O
) were allowed to react with ZrCl
in a LiCl-KCl eutectic salt at 500
C to give a metal chloride solution and a precipitate of ZrO
. By keeping the system quite still, the solution settled so that the ZrO
precipitate could be separated.
Albiol, T.*; Serizawa, Hiroyuki; Arai, Yasuo
Journal of Nuclear Science and Technology, 39(Suppl.3), p.834 - 837, 2002/11
no abstracts in English
Serizawa, Hiroyuki; Nakajima, Kunihisa; Arai, Yasuo; Yamashita, Toshiyuki; Kuramoto, Kenichi; Kinoshita, H.*; Yamanaka, Shinsuke*; Uno, Masayoshi*; Kurosaki, K.*
Progress in Nuclear Energy, 38(3-4), p.237 - 240, 2001/02
Times Cited Count:5 Percentile:38.37(Nuclear Science & Technology)no abstracts in English
Serizawa, Hiroyuki; Arai, Yasuo
Journal of Alloys and Compounds, 312(1-2), p.257 - 264, 2001/00
Times Cited Count:11 Percentile:57.04(Chemistry, Physical)no abstracts in English
Serizawa, Hiroyuki; Arai, Yasuo; Suzuki, Yasufumi
Journal of Nuclear Materials, 280(1), p.99 - 105, 2000/06
Times Cited Count:22 Percentile:77.89(Materials Science, Multidisciplinary)no abstracts in English
Usuda, Shigekazu; Sakurai, Satoshi; ; Hirata, Masaru
JAERI-M 92-005, 13 Pages, 1992/02
no abstracts in English
Yanagisawa, Kazuaki
JAERI-M 90-120, 320 Pages, 1990/08
no abstracts in English
J. Chem. Soc., Faraday Trans., I, 84(4), p.1195 - 1197, 1988/00
no abstracts in English
;
JAERI-M 85-208, 53 Pages, 1986/01
no abstracts in English
Neutron Radiography, p.365 - 368, 1983/00
no abstracts in English
Murakami, Kiyonobu; ; ; Ono, Akio*; ; ; ;
JAERI-M 9876, 83 Pages, 1982/01
no abstracts in English
Journal of Nuclear Science and Technology, 19(8), p.638 - 645, 1982/00
Times Cited Count:3 Percentile:40.62(Nuclear Science & Technology)no abstracts in English
; ; ; ;
JAERI-M 9147, 46 Pages, 1980/11
no abstracts in English
; ; ;
JAERI-M 8865, 44 Pages, 1980/05
no abstracts in English
Ono, Akio; ; ; ; Murakami, Kiyonobu; Matsuura, Shojiro
Journal of Nuclear Science and Technology, 17(1), p.26 - 36, 1980/00
Times Cited Count:0 Percentile:0.00(Nuclear Science & Technology)no abstracts in English
; ; ; Ono, Akio; Murakami, Kiyonobu; Matsuura, Shojiro; ; ; ;
Journal of Nuclear Science and Technology, 15(3), p.166 - 182, 1978/03
Times Cited Count:3no abstracts in English