Development of low decontaminated MOX fuel containing MA I; Influence of Np on sintering behavior and phase separation for (Pu,Np,U) O

Morimoto, Kyoichi; Kato, Masato; Nishiyama, Motokuni; Endo, Hideo; Kono, Shusaku; Uno, Hiroki*; Tamura, Tetsuya*; Sugata, Hiromasa*

JNC TN8400 2003-011, 32 Pages, 2003/01

JNC-TN8400-2003-011.pdf:0.62MB

MOX fuel containing Neptunium is being developed as candidate fuel for an advanced nuclear fuel recycle. In this report, influence of Np on the sintering behavior, phase separation behavior of MOX fuel pellets and the homogeneity of MOX fuel pellets were evaluated. It was observed that the high Np containing pellets had a low sintered density and the microstructure changes of the pellets during the sintering were slow compared with MOX without Np. The pellets were also analyzed via Ceramography, X-ray diffraction measurement and an electron probe microanalysis. The phase separation behavior of MOX with Np was similar to that of MOX. The homogeneity of the pellet produced with this experiment was acceptable to the fuel specification.

Irradiation embrittlement of 2.25Cr-1Mo steel at 400C and its electrochemical evaluation

Nishiyama, Yutaka; Fukaya, Kiyoshi; Suzuki, Masahide; Eto, Motokuni

Journal of Nuclear Materials, 258-263, p.1187 - 1192, 1998/00

https://doi.org/10.1016/S0022-3115(98)00184-6

no abstracts in English

Post-irradiation fatigue test of 21/4Cr-1Mo steel for the pressure vessel material of the HTTR

; Fukaya, Kiyoshi; Nishiyama, Yutaka; Suzuki, Masahide; Eto, Motokuni; Omi, Masao; Mimura, Hideaki; Ooka, Norikazu

JAERI-Research 96-028, 33 Pages, 1996/06

JAERI-Research-96-028.pdf:1.85MB

no abstracts in English

Estimation of toughness degradation by microhardness and small punch tests

Suzuki, Masahide; Eto, Motokuni; Nishiyama, Yutaka; Fukaya, Kiyoshi;

Small Specimen Test Techniques; ASTM STP 1204, p.217 - 227, 1993/00

no abstracts in English

Development of a miniaturized bulge test(small punch test) for post-irradiation mechanical property evaluation

Eto, Motokuni; *; *; Suzuki, Masahide; Nishiyama, Yutaka; Fukaya, Kiyoshi; Jitsukawa, Shiro

Small Specimen Test Techniques; ASTM STP 1204, p.241 - 255, 1993/00

no abstracts in English

Small specimen test techniques for the evaluation of toughness degradation

Suzuki, Masahide; Eto, Motokuni; Nishiyama, Yutaka; Fukaya, Kiyoshi; *; *

Journal of Nuclear Materials, 191-194, p.1023 - 1027, 1992/00

https://doi.org/10.1016/0022-3115(92)90629-Y

no abstracts in English

Electrochemical evaluation of thermal aging embrittlement of 21/4Cr-1Mo steel for the pressure vessel of High Temperature Engineering Test Reactor

Nishiyama, Yutaka; Fukaya, Kiyoshi; Suzuki, Masahide; Eto, Motokuni; *

Tainetsu Kinzoku Zairyo Dai-123-Iinkai Kenkyu Hokoku, 32(2), p.169 - 175, 1991/00

no abstracts in English