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Journal Articles

Fission gas release from irradiated mixed-oxide fuel pellet during simulated reactivity-initiated accident conditions; Results of BZ-3 and BZ-4 tests

Kakiuchi, Kazuo; Udagawa, Yutaka; Amaya, Masaki

Annals of Nuclear Energy, 155, p.108171_1 - 108171_11, 2021/06

 Times Cited Count:0 Percentile:0.01(Nuclear Science & Technology)

Journal Articles

Utilizing PUNITA experiments to evaluate fundamental delayed gamma-ray spectroscopy interrogation requirements for nuclear safeguards

Rodriguez, D.; Koizumi, Mitsuo; Rossi, F.; Seya, Michio; Takahashi, Tone; Bogucarska, T.*; Crochemore, J.-M.*; Pedersen, B.*; Takamine, Jun

Journal of Nuclear Science and Technology, 57(8), p.975 - 988, 2020/08

 Times Cited Count:3 Percentile:57.22(Nuclear Science & Technology)

Journal Articles

Electrochemical behaviors of PuN and (U, Pu)N in LiCl-KCl eutectic melts

Shirai, Osamu; Kato, Tetsuya*; Iwai, Takashi; Arai, Yasuo; Yamashita, Toshiyuki

Journal of Physics and Chemistry of Solids, 66(2-4), p.456 - 460, 2005/02

 Times Cited Count:8 Percentile:38.06(Chemistry, Multidisciplinary)

Electrochemical behaviors of PuN and (U, Pu)N in the LiCl-KCl eutectic melt containing UCl$$_{3}$$ and PuCl$$_{3}$$ at 773 K were investigated by cyclic voltammetry. The electrochemical dissolution of PuN and (U, Pu)N began nearly at -1.0 V vs. the Ag/AgCl reference electrode. The rest potentials of PuN and (U, Pu)N were observed at about 0.15 V more negative potential than that of UN since the equilibrium potential of UN is about 0.15 V more positive than that of PuN. In the cyclic voltammogram measured by using (U, Pu)N as the working electrode, a steep rise of the positive current was observed at more positive potential than -0.4 V in analogy with the cyclic voltammogram measured by using UN as the working electrode. In addition, there were two anodic current waves in the voltammogram with (U, Pu)N, though the wave form was not clear. This indicates that UN and PuN would be dissolved independently irrespective of formation of the solid solution, (U, Pu)N.

Journal Articles

Fission gas release in irradiated UO$$_{2}$$ fuel at burnup of 45 GWd/t during simulated Reactivity Initiated Accident (RIA) condition

Amaya, Masaki; Sugiyama, Tomoyuki; Fuketa, Toyoshi

Journal of Nuclear Science and Technology, 41(10), p.966 - 972, 2004/10

 Times Cited Count:7 Percentile:46.21(Nuclear Science & Technology)

Pulse irradiation simulating RIA condition was carried out for test rod prepared from fuel irradiated in a commercial reactor. After the pulse irradiation, optical microscopy (OM) and scanning electron microscopy (SEM) observations and electron probe micro analysis (EPMA) were conducted for the test rod as a part of destructive tests. Fission gas release behavior during pulse irradiation was investigated by EPMA and puncture test. Xeon depression was observed in the fuel pellet after pulse irradiation at periphery and center region. It is considered that fission gas was mainly released from the pellet center region during pulse irradiation. The amount of xenon release during pulse irradiation was estimated to be 10-12% from the EPMA results and this estimated value was comparable with the puncture test result. Comparing the estimated value with other results of out-of-pile annealing tests, it was concluded that most fission gas, which was accumulated at grain boundary during base irradiation, was released from the center region of test fuel pellet during pulse irradiation.

Journal Articles

Strength proof evaluation of diffusion-jointed W/Ta interfaces by small punch test

Li, J.-F.*; Kawai, Masayoshi*; Kikuchi, Kenji; Igarashi, Tadashi*; Kurishita, Hiroaki*; Watanabe, Ryuzo*; Kawasaki, Akira*

Journal of Nuclear Materials, 321(2-3), p.129 - 134, 2003/09

 Times Cited Count:13 Percentile:65.83(Materials Science, Multidisciplinary)

For the development of tantalum-clad tungsten targets for spallation neutron sources, the bonding strength of tantalum-tungsten interface was investigated by means of an easy-to-use and miniaturized small punch (SP) test, in which a punching load is vertically applied to the center of a jointed disk. Cracks initiated and propagated in the tungsten side for all the samples hot-isostatically pressed (HIPed) at temperatures from 1673 to 2073 K, whereas nocrack and debonding were observed in the interface, indicating that the jointed interface is strongly bonded. The re-crystallization of tungsten occurs and results in its strength reduction, consequently the crack-initiating load decreases with HIPing temperature. The finite element analysis of the measured SP testing results shows that the maximum bonding strength can exceed 1000 MPa. The present study shows that SP test is suitable for the strength evaluation of jointed tantalum-tungsten interfaces.

Journal Articles

Fission gas release behavior of high burnup UO$$_{2}$$ fuel under reactivity initiated accident conditions

Sasajima, Hideo; Nakamura, Jinichi; Fuketa, Toyoshi; Uetsuka, Hiroshi

Journal of Nuclear Science and Technology, 36(11), p.1101 - 1104, 1999/11

 Times Cited Count:2 Percentile:21.63(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Actinide nitrides and nitride-halides in high-temperature systems

Ogawa, Toru; Kobayashi, Fumiaki; Sato, Tadashi; R.G.Haire*

Journal of Alloys and Compounds, 271-273, p.347 - 354, 1998/00

 Times Cited Count:16 Percentile:68.56(Chemistry, Physical)

no abstracts in English

JAEA Reports

Journal Articles

Thermodynamics of carbothermic synthesis of actinide mononitrides

Ogawa, Toru; Shirasu, Yoshiro; Minato, Kazuo; Serizawa, Hiroyuki

Journal of Nuclear Materials, 247, p.151 - 157, 1997/00

 Times Cited Count:15 Percentile:75.08(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Fluctuations and the many-body Lyapunov exponent

D.M.Barnett*; Tajima, Toshiki*

Physical Review E, 54(6), p.6084 - 6092, 1996/12

 Times Cited Count:11 Percentile:49.04(Physics, Fluids & Plasmas)

no abstracts in English

JAEA Reports

Study on transition between heat conduction and convection using particle methods

Watanabe, Tadashi;

JAERI-Research 96-046, 50 Pages, 1996/09

JAERI-Research-96-046.pdf:1.58MB

no abstracts in English

Journal Articles

Development of post-irradiation examination techniques at the reactor fuel examination facility

Yamahara, Takeshi; Nishino, Yasuharu; Amano, Hidetoshi;

IAEA-TECDOC-822, 0, p.43 - 54, 1995/09

no abstracts in English

Journal Articles

Thermodynamic properties of (U,Pu)N$$_{1-x}$$ with a sublattice formalism; Equilibria involving the nonstoichiometric nitrides

Ogawa, Toru

Journal of Nuclear Materials, 201, p.284 - 292, 1993/00

 Times Cited Count:12 Percentile:75.05(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Methods and devices for small specimen testing at the Japan Atomic Energy Research Institute

Jitsukawa, Shiro; Kizaki, Minoru; ; Shiba, Kiyoyuki; Hishinuma, Akimichi

Small Specimen Test Techniques; ASTM STP 1204, p.289 - 307, 1993/00

 Times Cited Count:15 Percentile:98.62

no abstracts in English

Journal Articles

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

Journal Articles

Nondestructive evaluation of transient fission gas release from a pulse-irradiated PWR segment fuel by counting krypton 85

Yanagisawa, Kazuaki

Journal of Nuclear Science and Technology, 29(9), p.909 - 918, 1992/09

no abstracts in English

Journal Articles

Search for chaotic character of the time series of reactor signals

Suzudo, Tomoaki; Hayashi, Koji

Proc. of a Symp. on Nuclear Reactor Surveillance and Diagnostics,Vol. 1, 12 Pages, 1991/00

no abstracts in English

Journal Articles

Determination of nitrogen in UN, PuN and (U, Pu)N by oxidation in circulating oxygen and gas chromatographic measurement of the combustion gases

Handa, Nuneo; Shiozawa, Kenichi; Iwai, Takashi; Arai, Yasuo

Analytica Chimica Acta, 239, p.107 - 113, 1990/00

 Times Cited Count:9 Percentile:47.5(Chemistry, Analytical)

no abstracts in English

Journal Articles

Mass spectrometric study of ternary compounds PuMC$$_{2}$$(M=Fe.Co,Ni)

; ; ;

Journal of Nuclear Materials, 115, p.187 - 191, 1983/00

 Times Cited Count:0 Percentile:0.02(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Ternary compounds PuNiC$$_{2}$$ and PuCoC$$_{2}$$

; ; ;

Journal of Nuclear Science and Technology, 19(3), p.257 - 260, 1982/00

 Times Cited Count:3 Percentile:54.87(Nuclear Science & Technology)

no abstracts in English

25 (Records 1-20 displayed on this page)