JAEA Abstracts

-Research results below have been sorted by order of journals name.

-Sorry, some research results below have no English abstract.

May 2006

34000475
A New visualization technique for the study of the accumulation of photoassimilates in wheat grains using [¹¹C]CO₂
Matsuhashi, Shimpei; Fujimaki, Shu; Uchida, Hiroshi*; Ishioka, Noriko; Kume, Tamikazu
Applied Radiation and Isotopes 64(4), p.435-440(2006) ; (JAEA-J 00594)

34000476
Neutron powder diffraction study on the crystal and magnetic structures of BiCoO₃
Belik, A. A.*; Iikubo, Satoshi; Kodama, Katsuaki; Igawa, Naoki; Shamoto, Shinichi; Niitaka, Seiji*; Azuma, Masaki*; Shimakawa, Yuichi*; Takano, Mikio*; Izumi, Fujio*; Muromachi, Eiji*
Chemistry of Materials 18(3), p.798-803(2006) ; (JAEA-J 00595)

The crystal and magnetic structures of polycrystalline BiCoO₃ have been determined by the Rietveldmethod from neutron diffraction data measured at temperatures from 5 to 520 K. BiCoO₃ (space groupP4mm; Z=1; a=3.72937(7) Å and c=4.72382(15) Å at room temperature; tetragonality c/a=1.267)is isotypic with BaTiO₃ and PbTiO₃ in the whole temperature range. BiCoO₃ is an insulator with a Neeltemperature of 470 K. A possible model for antiferromagnetic order is proposed with a propagationvector of k=(1/2, 1/2, 0). In this model, magnetic moments of Co³⁺ ions are parallel to the c directionand align antiferromagnetically in the ab plane. The antiferromagnetic ab layers stack ferromagneticallyalong the c axis, forming a C-type antiferromagnetic structure. Refined magnetic moments at 5 and 300K are 3.24(2)μ_B and 2.93(2)μ_B, respectively. The structure refinements revealed no deviation fromstoichiometry in BiCoO₃. BiCoO₃ decomposed in air above 720 K to give Co₃O₄ and sillenite-like Bi₂₅CoO₃₉.

34000477
Case study on tritium inventory in the fusion DEMO plant at JAERI
Nakamura, Hirofumi; Sakurai, Shinji; Suzuki, Satoshi; Hayashi, Takumi; Enoeda, Mikio; Tobita, Kenji; DEMO Plant Design Team
Fusion Engineering and Design 81(8-14), p.1339-1345(2006) ; (JAEA-J 00596)

34000478
Safety handling characteristics of high-level tritiated water
Hayashi, Takumi; Ito, Takeshi*; Kobayashi, Kazuhiro; Isobe, Kanetsugu; Nishi, Masataka
Fusion Engineering and Design 81(8-14), p.1365-1369(2006) ; (JAEA-J 00597)

In a fusion reactor, high-level tritiated water of more than GBq/ml will be generated and stored temporally in the various areas. High level tritiated water decomposes by itself and generates hydrogen and oxygen, and becomes to tritiated hydrogen peroxide water, however, effective G-values from tritiated water are different from those obtained γ-ray experiments in our previous report. Furthermore, tritiated water of about 250GBq/ml has been stored for several years safely and checked its characteristics. Using the above experiences, this paper summarizes safety requirements for storage of high-level tritiated water and discusses design issues of the safety storage system. Concerning gaseous species, storage tank should be maintained at negative pressure and purged periodically or constantly to dedicated tritium removal system. Specially, it is important that the G-value of high-level tritiated water is increasing with decreasing the tritium concentration. The pH and ORP (Oxidation Reduction Potential) of tritiated water have been also changed depending on the tritium concentration and maintained for more than several years in glass vessel. High-level tritiated water of more than GBq/ml was acid and became to be corrosive depending on the dissolved species. Large amount of tritiated water will be stored in the various tanks of stainless steel, therefore, it should be monitored so that the liquid situation is maintained not to be corrosive.

34000479
Sorption and desorption of tritiated water on four kinds of materials for ITER
Kobayashi, Kazuhiro; Hayashi, Takumi; Nishi, Masataka; Oya, Yasuhisa*; Okuno, Kenji*
Fusion Engineering and Design 81(8-14), p.1379-1384(2006) ; (JAEA-J 00598)

In facilities of ITER, various construction materials are possibly exposed by tritium during periodical maintenances and an accident. It is required to establish the effective surface decontamination methods for the above construction materials of ITER. In tritium decontaminating, so-called "soaking" effect is important. This effect is based on sorption of tritiated water on the materials and subsequent desorption from them. In order to obtain and summarize data on the amount of tritium adsorption on the various materials, a series of tritiated water vapor exposure experiments have been carried out as a function of time. The amounts of tritium adsorption on the materials saturated almost within the period from several weeks to 1 month. The adsorption rate of the epoxy was found to be the largest. In the exposure time less than 2 hrs, the adsorption coefficients for the examined materials were found to be in the same order as those reported by F.Ono. It will be also discussed from viewpoint of kinetics for adsorption and desorption.

34000480
Real-time monitoring and analysis of nutrient transportation in a living plant using a positron emitting tracer imaging system (PETIS)
Matsuhashi, Shimpei
Gamma Field Symposia (43), p.71-79(2004) ; (JAEA-J 00599)

We visualized the uptake and transportation of nutrition in a living plant using positron-emitting tracers and mathematical analysis of the data. We have been developing a positron-imaging technique to visualize the uptake and transportation of nutrients in a plant by a positron-emitting tracer-imaging system (PETIS) using positron-emitting nuclide-labeled compounds. The PETIS data is analyzed mathematically to understand the physiological meaning of the physical parameters. In this study, the results on the uptake and transportation of nutrients, which were obtained with the use of a positron-imaging method, are introduced.

34000481
Mechanisms of uranium mineralization by the yeast saccharomyces cerevisiae
Onuki, Toshihiko; Ozaki, Takuo; Yoshida, Takahiro*; Sakamoto, Fuminori; Kozai, Naofumi; Wakai, Eiichi; Francis, A. J.; Iefuji, Haruyuki*
Geochimica et Cosmochimica Acta 69(22), p.5307-5316(2005) ; (JAEA-J 00600)

34000482
Improved method of fission track sample preparation for detecting particles containing fissile materials in safeguards environmental samples
Lee, C. G.; Iguchi, Kazunari; Esaka, Fumitaka; Magara, Masaaki; Sakurai, Satoshi; Watanabe, Kazuo; Usuda, Shigekazu
Japanese Journal of Applied Physics, Part 2 45(10), p.L294-L296(2006) ; (JAEA-J 00601)

We have developed an effective method for fission track (FT) sample preparation to perform particle analysis of the safeguards environmental samples by the FT-thermal ionization mass spectrometry (TIMS) method. In this method, a fission track detector and the layer containing particles are separated. The main feature of the developed FT sample is that the detection of a particle from the corresponding fission track can be performed correctly and in a simple manner by fixing each one end of the detector and the particle layer and by using an etching tool. It is expected that this method will enhance the effectiveness of particle analysis.

34000483
Electrochemical behavior of actinides and actinide nitrides in LiCl-KCl eutectic melts
Shirai, Osamu*; Yamana, Hajimu*; Arai, Yasuo
Journal of Alloys and Compounds 408-412, p.1267-1273(2006) ; (JAEA-J 00602)

34000484
Phenomenological nuclear level densities using the KTUY05 nuclear mass formula for applications off-stability
Kawano, Toshihiko*; Chiba, Satoshi; Koura, Hiroyuki
Journal of Nuclear Science and Technology 43(1), p.1-8(2006) ; (JAEA-J 00603)

34000485
Application of PZC to ¹⁸⁸W/¹⁸⁸Re generators
Matsuoka, Hiromitsu; Hashimoto, Kazuyuki; Hishinuma, Yukio*; Ishikawa, Koji*; Terunuma, Hitoshi*; Tatenuma, Katsuyoshi*; Uchida, Shoji*
Journal of Nuclear and Radiochemical Sciences 6(3), p.189-191(2005) ; (JAEA-J 00604)

Applicability of Mo adsorbent PZC(Poly Zirconium Compound) for ¹⁸⁸W/¹⁸⁸Re generator was investigated. Long term stability of adsorption of ¹⁸⁸W to the PZC column, elution of ¹⁸⁸Re from PZC column, desorption of ¹⁸⁸W from PZC column, and labeling of Hydroxyethylidene Diphosphonic Acid(HEDP) and Mercaptoacetyltriglycine(MAG3) with ¹⁸⁸Re eluted from PZC column were tested. The PZC generator gave reproducible ¹⁸⁸Re elution yields with low ¹⁸⁸W parent breakthrough for a long period of time(about 5 months), that is the ¹⁸⁸W/¹⁸⁸Re generator using PZC has a potential for practical use.

34000486
Labeling of bifunctional chelating agent, MAG3, with carrier-free ¹⁸⁸WRe
Hashimoto, Kazuyuki; Wan, K. W. H. B. B.*; Matsuoka, Hiromitsu
Journal of Nuclear and Radiochemical Sciences 6(3), p.193-196(2005) ; (JAEA-J 00605)

The radioisotopes of rhenium (¹⁸⁶Re and ¹⁸⁸WRe) are attractive radionuclides for radiotherapy because of their energetic beta particles and gamma rays suitable for imaging. Mercaptoacetyltriglycine, MAG3 (N₃S ligand), is a useful bifunctional ligand in labeling monoclonal antibodies with metallic radionuclides. In this study, the labeling of MAG3 with carrier-free ¹⁸⁸Re from a ¹⁸⁸W/¹⁸⁸Re generator was investigated in detail. The ¹⁸⁸Re-MAG3 complex was synthesized by the direct labeling method and by the indirect labeling method using a transfer ligand (citric acid or gluconic acid). The dependence of the labeling yield upon the reaction conditions such as the concentrations of tin(II) chloride dihydrate as a reducing agent, S-benzoyl MAG3 and the transfer ligand, pH, temperature, reaction time and the addition of a carrier was examined. The labeling yield of ¹⁸⁸Re-MAG3 synthesized by the all method was over 90% under the optimum conditions.

34000487
Study on electrolytic reduction of pertechnetate in nitric acid solution for electrolytic extraction of rare metals for future reprocessing
Asakura, Toshihide; Kim, S.-Y.; Morita, Yasuji; Ozawa, Masaki*
Journal of Nuclear and Radiochemical Sciences 6(3), p.267-269(2005) ; (JAEA-J 00606)

An electrolytic extraction (EE) method, i.e. electro-reductive deposition, of Tc from nitric acid aqueous solution was studied for future reprocessing. After 30 min of constant potential electrolysis by carbon electrode at -0.3 V vs. SSE (Standard Silver Electrode), Tc concentration in 3 M nitric acid decreased to 93 % of the initial value, which corresponds to 7 % of deposition. With co-existence of Pd, the value reached to 15 % of deposition equivalent by electrolysis at ±0.0 V vs. SSE for 60 min. An acceleration effect of Pd on Tc deposition (promoter effect) was suggested. The concentration, however, increased to the initial value after further electrolysis and competing re-dissolution of deposited Tc was also suggested. In cyclic voltammetry measurements, it was found that the deposit from Tc-Pd-Ru-Rh solution dissolved easier than that from Pd-Ru-Rh did. In electrolyzed Tc solution, an absorption peak at 482 nm was found. It can be attributed to the complex with nitrite anion, and the complex formation is proposed as one possible mechanism of Tc re-dissolution.

34000488
Technetium separation for future reprocessing
Asakura, Toshihide; Hotoku, Shinobu; Ban, Yasutoshi; Matsumura, Masakazu; Morita, Yasuji
Journal of Nuclear and Radiochemical Sciences 6(3), p.271-274(2005) ; (JAEA-J 00607)

Tc extraction and separation experiments were performed basing on PUREX technique with using spent UO₂ fuel with burn-up of 44 GWd/t. The experimental results were examined with performing calculations by a simulation code ESSCAR (Extraction System Simulation Code for Advanced Reprocessing). It was demonstrated that Tc can be almost quantitatively extracted from a dissolver solution and that Tc can also be almost quantitatively recovered by scrubbing. Further, it was clearly presented from the calculation results of ESSCAR that the extraction mechanism of Tc is dominated by the synergistic effect of Zr and U.

34000489
BiScO₃: Centrosymmetric BiMnO₃-type oxide
Belik, A. A.*; Iikubo, Satoshi; Kodama, Katsuaki; Igawa, Naoki; Shamoto, Shinichi; Maie, Makoto*; Nagai, Takuro*; Matsui, Yoshio*; Stefanovich, S. Y.*; Lazoryak, B. I.*; Muromachi, Eiji*
Journal of the American Chemical Society 128(3), p.706-707(2006) ; (JAEA-J 00608)

The crystal structure of BiScO₃ have been determined by neutron diffraction and electron diffraction measurements. All experimental results shows space group of BiScO₃ is C2/c, which has a center of symmetry.

34000490
Determination of ionization potential of calcium by high-resolution resonance ionization spectroscopy
Miyabe, Masabumi; Geppert, C.*; Kato, Masaaki; Oba, Masaki; Wakaida, Ikuo; Watanabe, Kazuo; Wendt, K. D. A.*
Journal of the Physical Society of Japan 75(3), p.034302_1-034302_10(2006) ; (JAEA-J 00609)

High-resolution resonance ionization spectroscopy has been utilized to determine a precise ionization potential of Ca. Three-step resonance excitation with single-mode extended cavity diode lasers populates long and unperturbed Rydberg series of 4snp (1P1) and 4snf (1F3) states in the rage of n=20-150. By using an extended Ritz formula for quantum defect, the series convergence limit has been determined to be 49305.9240 (20) cm^-1 with the accuracy improved one order of magnitude higher than previously reported ones.

34000491
Discovery of the "Devil's flower" in a charge-ordering system; Synchrotron X-ray diffraction study of NaV₂O₅
Owada, Kenji; Fujii, Yasuhiko; Nakao, Hironori*; Murakami, Yoichi*; Isobe, Masahiko*; Ueda, Yutaka*
Modern Physics Letters B 20(5), p.199-214(2006) ; (JAEA-J 00610)

We review recent synchrotron diffraction studies of NaV₂O₅. The resonant X-ray scattering performed on a monoclinically-split single domain of NaV₂O₅ shows a critically enhanced contrast between V⁴⁺ and V⁵⁺ ions. The results has led us to the unequivocal conclusion of the charge-order pattern of low-temperature phase of NaV₂O₅ below T_c = 35 K. In spite of the possible four types of configuration of the zig-zag-type charge-order patterns in the ab-plane (A, A', B and B'), the stacking sequence along the c-axis is determined as the AAA'A' type by comparison with model calculations. By assigning the A and A' configurations to Ising spins ↑ and ↓, one can reasonably explain the previously discovered "devil's staircase"-type behavior with respect to the modulation of layer-stacking sequences at high pressures and low temperatures, which clearly resembles the global phase diagram theoretically predicted by the ANNNI model, called "devil's flower". This is the first case that the devil's flower appears in such a charge-ordering system, where charge-order patterns are regarded as Ising spins.

34000492
Electronic properties of transuranium compounds with HoCoGa₅-type tetragonal crystal structure
Maehira, Takahiro*; Hotta, Takashi; Ueda, Kazuo*; Hasegawa, Akira*
New Journal of Physics (Internet) 8(24), 20p.(2006) ; (JAEA-J 00611)

By using a relativistic band-structrue calculation method, we investigate energy band structures and the Fermi surfaces of NpTGa₅, PuTGa₅, and AmCoGa₅ with transition metal atoms T. It is found in common that the energy bands in the vicinity of the Fermi level are mainly due to the large hybridization between 5f and Ga 4p electrons. For PuTGa₅, we observe several cylindrical sheets of Fermi surfaces with large volume for T=Co, Rh, and Ir. It is also found that the Fermi surfaces of NpFeGa₅, NpCoGa₅, and NpNiGa₅ are similar to those of UCoGa₅, UNiGa₅, and PuCoGa₅, respectively, except for small details. For AmCoGa₅, the Fermi surfaces are found to consist of large cylindrical electron sheets and small closed hole sheets, similar to PuCoGa₅. The similarity is basically understood by a rigid-band picture.

34000493
Analysis on split failure of cladding of high burnup BWR rods in reactivity-initiated accident conditions by RANNS code
Suzuki, Motoe; Saito, Hiroaki*; Fuketa, Toyoshi
Nuclear Engineering and Design 236(2), p.128-139(2006) ; (JAEA-J 00612)

A computer code RANNS was developed to analyze fuel rod behaviors in the RIA conditions. The code performs thermal and FEM-mechanical calculation for a single rod in axis-symmetric geometry to predict temperature profile, PCMI contact pressure, stress-strain distribution and their interactions. An experimental analysis by RANNS begins with pre-test conditions of irradiated rod which are given by FEMAXI-6. Analysis was performed on the simulated RIA experiments in NSRR, FK-10 and FK-12, of high burnup BWR rods in a cold start-up conditions, and PCMI process was discussed extensively. It was revealed that pellet thermal expansion dominates cladding deformation and subjects the cladding to bi-axial stress state, and thermal expansion in the cladding makes the stress in the inner region significantly lower than that in the outer region. Simulation calculations with wider pulses were carried out and the resulted cladding hoop stress was compared with the failure stress estimated in the NSRR experiments.

34000494
Observation of the interaction between the geodesic acoustic mode and ambient fluctuation in the JFT-2M tokamak
Ido, Takeshi*; Miura, Yukitoshi; Hoshino, Katsumichi; Kamiya, Kensaku; Hamada, Yasuji*; Nishizawa, Akimitsu*; Kawasumi, Yoshiaki*; Ogawa, Hiroaki; Nagashima, Yoshihiko*; Shinohara, Koji; Kusama, Yoshinori; JFT-2M Group
Nuclear Fusion 46(5), p.512-520(2006) ; (JAEA-J 00613)

The electrostatic fluctuation spectrum and the fluctuation-induced particle flux of the JFT-2M tokamak were estimated using the hevy ion beam probe (HIBP) measurement. A geodesic acoustic mode (GAM) of the frequency about15kHz was identified in the L-mode. The GAM has its peak at about 3cm inside of the separatrix with the electric field of about 1.4kV/m. The estimated turbulent particle flux is found to be intermittent. It is found that the density fluctuation is modulated by the GAM in the wide frequency range and the coherence analysis shows that the flucruation-induced particle flux is partially contributed by the GAM. In the H-mode the GAM disappears and the fluctuation and the flux is much decreased.The mechanism of the large burst-like flux in the L-mode is not understood yet and left as the future problem.

34000495
X-ray absorption fine structure and photon-stimulated ion desorption from solid MoO₃ at molybdenum 3p_1/2, 3p_3/2, and oxygen 1s edges
Wu, G.*; Sekiguchi, Tetsuhiro; Baba, Yuji; Shimoyama, Iwao
Nuclear Instruments and Methods in Physics Research B 245(2), p.406-410(2006) ; (JAEA-J 00614)

We investigated photon-stimulated ion desorption (PSID) from solid MoO₃ following Mo 3p_1/2, 3p_3/2 and O 1s inner-shell excitations. The photon-energy dependences of O+ ion desorption yields were measured using quadrupole mass spectrometry. Near-edge X-ray absorption fine structure (NEXAFS) spectra were measured by the total electron yield method and were compared with the desorption yield curves. Relatively high desorption yields were observed in O 1s → e_g resonance compared with that in O 1s → t_2g resonance, while no enhanced yields were observed in either the Mo 3p_1/2 or Mo 3p_3/2 edge. The enhancement effect in the O 1s → e_g resonance was attributed to fast bond breakage induced by the antibonding nature of the σ-like e_g orbital. On the other hand, the non-enhancement following the Mo 3p_1/2 and 3p_3/2 edges was ascribed to the de-excitation of the excited electrons via very fast Coster-Kronig transitions, which can take place only following Mo 3p_1/2 and 3p_3/2 excitations.

34000496
Replica symmetry breaking for the Ising spin glass within cluster approximations
Yokota, Terufumi
Physica A 363(2), p.161-170(2006) ; (JAEA-J 00615)

Within a class of cluster approximations, the Ising spin glass model on a d-dimensional hypercubic lattice is solved near the spin glass transition temperature. Spin glass order parameter function and Almeida-Thouless line are obtained.

34000497
Spin, charge, and orbital correlations in the one-dimensional t_2g-orbital Hubbard model
Xavier, J. C.*; Onishi, Hiroaki; Hotta, Takashi; Dagotto, E.*
Physical Review B 73(1), p.014405_1-014405_9(2006) ; (JAEA-J 00616)

We present the zero-temperature phase diagram of the one-dimensional t_2g-orbital Hubbard model, by using the density-matrix renormalization group and Lanczos techniques. Emphasis is given to the case for the electron density n=5, of relevance to Co-based compounds. Several other cases for electron densities between n=3 and 6 are also studied. At n=5, our results indicate a first-order transition between a paramagnetic (PM) insulator phase and a ferromagnetic (FM) state by tuning the Hund's coupling. The results also suggest a transition from the n=5 PM insulator phase to a metallic regime by changing the electron density. The behavior of the spin, charge, and orbital correlation functions in the FM and PM states are discussed.

34000498
Induced orbital polarization of Ga ligand atoms in UTGa₅ (T=Ni, Pd, and Pt)
Kuzushita, Kaori*; Ishii, Kenji; Wilkins, S. B.*; Janousova, B.*; Inami, Toshiya; Owada, Kenji; Tsubota, Masami; Murakami, Yoichi; Kaneko, Koji; Metoki, Naoto; Ikeda, Shugo; Haga, Yoshinori; Onuki, Yoshichika*; Bernhoeft, N.*; Lander, G. H.*
Physical Review B 73(10), p.104431_1-104431_5(2006) ; (JAEA-J 00617)

We report a resonant X-ray scattering study of antiferromagnetic uranium compounds UTGa₅ (T=Ni, Pd, and Pt) at the Ga K-edge. A large resonant signal is observed below the N'eel temperatures. The azimuth dependence in both π-π' and π-σ polarization channels establishes that the resonant signal has the symmetry of the magnetic dipole. This resonance with the band electrons is interpreted within a semi-localized model as an orbital polarization of the Ga 4p states induced through strong hybridization with U 5f valence level. These results demonstrate that resonant magnetic X-ray scattering at the anions, taken in combination with symmetry arguments, can be used to determine the configuration of the U 5f moments and provide information about the hybridization.

34000499
Structure of a quantized vortex near the BCS-BEC crossover in atomic fermi gas
Machida, Masahiko; Koyama, Tomio*
Physical Review Letters 94(14), p.140401_1-140401_4(2005) ; (JAEA-J 00618)

34000500
Opacity effect on extreme ultraviolet radiation from laser-produced tin plasmas
Fujioka, Shinsuke*; Nishimura, Hiroaki*; Nishihara, Katsunobu*; Sasaki, Akira; Sunahara, Atsushi*; Okuno, Tomoharu*; Ueda, Nobuyoshi*; Ando, Tsuyoshi*; Tao, Y.*; Shimada, Yoshinori*; Hashimoto, Kazuhisa*; Yamaura, Michiteru*; Shigemori, Keisuke*; Nakai, Mitsuo*; Nagai, Keiji*; Norimatsu, Takayoshi*; Nishikawa, Takeshi*; Miyanaga, Noriaki*; Izawa, Yasukazu*; Mima, Kunioki*
Physical Review Letters 95(23), p.235004_1-235004_4(2005) ; (JAEA-J 00619)

34000501
Homodimeric cross-over structure of the human granulocyte colony-stimulating factor (GCSF) receptor signaling complex
Tamada, Taro; Honjo, Eijiro; Maeda, Yoshitake*; Okamoto, Tomoyuki*; Ishibashi, Matsujiro*; Tokunaga, Masao*; Kuroki, Ryota
Proceedings of the National Academy of Sciences of the United States of America 103(9), p.3135-3140(2006) ; (JAEA-J 00620)

A crystal structure of the signaling complex between human granulocyte colony-stimulating factor (GCSF), and a ligand binding region of GCSF receptor (GCSF-R), has been determined to 2.8Å resolution. The GCSF:GCSF-R complex formed a 2:2 stoichiometry via a cross-over interaction between the Ig-like domains of GCSF-R and GCSF. The conformation of the complex is quite different to that between human GCSF and the CRH domain of mouse GCSF-R, but similar to that of the interleukin-6 (IL-6)/gp130 signaling complex. The Ig-like domain cross-over structure necessary for GCSF-R activation is consistent with previously reported thermodynamic and mutational analyses.

34000502
Decomposition of p-nonylphenols in water and elimination of their estrogen activities by ⁶⁰Co γ-ray irradiation
Kimura, Atsushi; Taguchi, Mitsumasa; Otani, Yoshimi*; Takigami, Machiko; Shimada, Yoshitaka*; Kojima, Takuji; Hiratsuka, Hiroshi*; Namba, Hideki
Radiation Physics and Chemistry 75(1), p.61-69(2006) ; (JAEA-J 00621)

Decomposition of p-Nonylphenols (NPs) in water at 1 μmol dm^-3 was decreased exponentially with absorbed dose when NPs were irradiated by ⁶⁰Coγ-rays. Two products having molecular weight of 236, presumably OH adducts of NPs, were detected by LC-MS analyses. The elimination of estrogen activity of aqueous NPs solution including such irradiation products at 5000 Gy (J kg^-1) was confirmed by the yeast two hybrid assay. These results should expand the application of ionizing radiation to the treatment of NPs.

34000503
Characteristics study on suspended fine particles in aqueous phenol solution formed by electron beam irradiations
Taguchi, Mitsumasa; Zennyoji, Yoshihiro*; Takigami, Machiko*; Baldacchino, G.*; Kimura, Atsushi; Hiratsuka, Hiroshi*; Namba, Hideki; Kojima, Takuji
Radiation Physics and Chemistry 75(5), p.564-571(2006) ; (JAEA-J 00622)

The suspended fine particles formed in aqueous phenol solution under high dose irradiation were studied using the MeV electron beam and ⁶⁰Co γ-ray irradiations. The fine particle's size was 100-800 nm in diameter and became bigger at higher dose and lower dose rate. The distributions of the particle size became narrower for irradiation at higher dose rate. The fine particles were regarded to consist of molecules of about 1.9×10² molecular weight.

34000504
Calculations for the availability of photoneutron using synchrotron radiation
Asano, Yoshihiro; Kawashima, Yoshitaka*
Radiation Protection Dosimetry 115(1-4), p.176-180(2005) ; (JAEA-J 00623)

34000505
High intensity proton accelerator project in Japan (J-PARC)
Tanaka, Shunichi
Radiation Protection Dosimetry 115(1-4), p.33-43(2005) ; (JAEA-J 00624)

High Intensity Proton Accelerator Project, named as J-PARC, was started on April 1, 2001 at Tokai-site of JAERI. The accelerator complex of J-PARC consists of three accelerators: 400MeV Linac, 3GeV rapid cycle synchrotron and 50GeV synchrotron, and four major experimental facilities: Material and Life Science Facility, Nuclear and Particle Physics Facility, Nuclear Transmutation Experiment Facility and Neutrino Facility. The outline of the J-PARC is presented with the present status of construction.

34000506
Shielding design of the ITER NBI Duct for nuclear and bremsstrahlung radiation
Sato, Satoshi; Iida, Hiromasa; Yamauchi, Michinori*; Nishitani, Takeo
Radiation Protection Dosimetry 116(1-4), p.28-31(2005) ; (JAEA-J 00625)

34000507
Comparison of thermal neutron distributions within shield materials obtained by experiments, SN and Monte Carlo code calculations
Asano, Yoshihiro; Sugita, Takeshi*; Suzaki,Takenori; Hirose, Hideyuki
Radiation Protection Dosimetry 116(1-4), p.284-289(2005) ; (JAEA-J 00626)

34000508
Characterization of radionuclides formed by high-energy neutron irradiation
Yokoyama, Sumi; Sato, Kaoru; Noguchi, Hiroshi; Tanaka, Susumu; Iida, Takao*; Furuichi, Shinya*; Kanda, Yukio*; Oki, Yuichi*; Kaneto, Taihei*
Radiation Protection Dosimetry 116(1-4), p.401-405(2005) ; (JAEA-J 00627)

The physicochemical property of radionuclides suspended in the air is an important parameter to evaluate internal doses due to the inhalation of the airborne radionuclides and to develop the air monitoring system in high-energy proton accelerator facilities. This study focuses on the property of radioactive airborne chlorine (³⁸Cl and ³⁹Cl) and sulfur (³⁸S) formed from Ar gas by irradiation with high-energy neutrons. As a result of the irradiation to a mixture of Ar gas and dry air, ³⁸Cl and ³⁹Cl existed as non-acidic gas and ³⁸S was present as acidic gas. Further, it was found that in the high-energy neutron irradiation to aerosol containing-Ar gas, the higher the amount of radioactive aerosols becomes, the lower that of radioactive acidic gas becomes.

34000509
Experiment and analyses for 14 MeV neutron streaming through a dogleg duct
Yamauchi, Michinori*; Ochiai, Kentaro; Morimoto, Yuichi*; Wada, Masayuki*; Sato, Satoshi; Nishitani, Takeo
Radiation Protection Dosimetry 116(1-4), p.542-546(2005) ; (JAEA-J 00628)

34000510
High sensitive gasochromic hydrogen sensors using tungsten oxide thin films
Takano, Katsuyoshi; Yamamoto, Shunya; Yoshikawa, Masahito; Inoue, Aichi; Sugiyama, Akira
Transactions of the Materials Research Society of Japan 31(1), p.223-226(2006) ; (JAEA-J 00629)

34000511
Gasochromic property of oriented tungsten oxide thin films
Inoue, Aichi; Takano, Katsuyoshi; Yamamoto, Shunya; Yoshikawa, Masahito; Nagata, Shinji*
Transactions of the Materials Research Society of Japan 31(1), p.227-230(2006) ; (JAEA-J 00630)

34000512
X-ray topography on piezoelectric La₃Ga₅SiO₁₄ single crystal
Yoneda, Yasuhiro; Okajima, Yuka*; Takeda, Hiroaki*; Shiosaki, Tadashi*; Mizuki, Junichiro
Transactions of the Materials Research Society of Japan 31(1), p.7-10(2006) ; (JAEA-J 00631)

34000513
Current status of research and development at Japan Atomic Energy Agency (in Japanese)
Ichimura, Toshio; Uetsuka, Hiroshi
Denki Hyoron 91(2), p.62-80(2006) ; (JAEA-J 00632)

34000514
Advanced light water reactors for sustainable energy supply (in Japanese)
Nakatsuka, Toru
Dennetsu 44(189), p.9-14(2005) ; (JAEA-J 00633)

34000515
Perspective toward commercialization of FR cycle technology around 2050; Pursuit of a harmonious solution to energy and environment issues (in Japanese)
Mukai, Kazuo
Enerugi Rebyu 26(4), p.8-11(2006) ; (JAEA-J 00634)

34000516
Measurements of deuteron-induced activation cross sections for IFMIF accelerator structural materials (in Japanese)
Nakao, Makoto; Hori, Junichi*; Ochiai, Kentaro; Kubota, Naoyoshi; Sato, Satoshi; Yamauchi, Michinori; Ishioka, Noriko; Nishitani, Takeo
FAPIG (172), p.3-7(2006) ; (JAEA-J 00635)

The IFMIF (International Fusion Materials Irradiation Facility) is in the design planning stage as neutron source to test fusion reactor materials for high fluence neutron. In the design of it long-term operation that total facility is 70 % at least is required. However, deuteron beam activates the structural materials and these activation limits maintenance and makes long-term operation difficult. Thus the accurate estimation of deuteron-induced activity and the selection of structural materials are important. In this work, measurements of deuteron-induced activation cross sections for aluminum, iron, copper, tantalum, and tungsten were performed.

34000517
Transmutation experimental facility (in Japanese)
Oigawa, Hiroyuki
Genshikaku Kenkyu 50(4), p.113-121(2006) ; (JAEA-J 00636)

The Partitioning and Transmutation technology for long-lived nuclear wastes is important to utilize the nuclear energy in sustainable manner. In the J-PARC project, the "Transmutation Experimental Facility (TEF)" is planned to be constructed aiming at the experimental study on the accelerator-driven transmutation system (ADS) for effective transmutation of minor actinides and other transmutation systems including fast reactors. TEF consists of two buildings: the Transmutation Physics Experimental Facility where the reactor physics and the controllability of ADS are to be studied using MA-bearing fuel and a low-power proton beam, and the ADS Target Test Facility where the technological development of a spallation target and related materials for ADS is to conducted using a 200kW proton beam.

34000518
Research items at ADS target test facility (in Japanese)
Kikuchi, Kenji
Genshikaku Kenkyu 50(4), p.131-149(2006) ; (JAEA-J 00637)

Development on lead bismuth spallation target techniques is planned at the ADS target test facility in the J-PARC, Japan Proton Accelerator Research Complex. It aims at realizing an accelerator driven transmutation system to reduce the negative effect of waste disposals. Achievements of lead bismuth target technology are described from research and development activities of high-energy proton beam irradiation and lead bismuth corrosion-erosion tests with referring the 800MW ADS plant model. Experimental items in J-PARC test facilities is mentioned.

34000519
Neutron science to be performed in the material life science facility of J-PARC (in Japanese)
Arai, Masatoshi
Genshikaku Kenkyu 50(4), p.59-67(2006) ; (JAEA-J 00638)

34000520
Specific absorbed fractions for photon and electron to a simple stomach model considering stem cells (in Japanese)
Kinase, Sakae; Watanabe, Ritsuko; Saito, Kimiaki
Hoken Butsuri 40(4), p.360-364(2005) ; (JAEA-J 00640)

The aim of the present work is the development of logical dosimetry for human alimentary tract. In this work, a simple stomach model with stem cells has been developed. Also, specific absorbed fractions for photon and electron to the stomach model have been evaluated in the energy range 10 keV-4MeV using Monte Calro simulation. Furthermore, S values to the stomach model have been evaluated for several positron sources: ¹¹C, ¹³N, ¹⁵O and ¹⁸F. Consequently, it was found that photon SAFs to stem cells in the stomach are greater than those to the whole stomach wall. Electron SAFs to stem cells in the stomach were also found to be less than those used in the radiological protection. The stomach wall S values are less than those used in the radiological protection. It is concluded that the determination of target tissue in the stomach is very important for the SAF and S value evaluations.

34000521
Development of dose assessment code for accidental tritium releases; ACUTRI
Yokoyama, Sumi; Noguchi, Hiroshi; Kurosawa, Naohiro*
Hoken Butsuri 40(4), p.376-384(2005) ; (JAEA-J 00641)

A computer code named ACUTRI has been developed to assess tritium doses due to inhalation to the general public. ACUTRI can calculate the radiological impact of tritium gas (HT) and tritiated water (HTO) released accidentally to the atmosphere. The models in this code consist of a tritium transfer model including the oxidation of HT to HTO and the reemission of HTO from soil to the atmosphere and a dose calculation model. The atmospheric dispersion of the primary HT and HTO plumes and secondary HTO plume, which is reemitted from soil to the atmosphere, is calculated by using the Gaussian plume model. In this calculation, it is possible to analyze statistically on meteorology in the same way as a conventional dose assessment method according to the meteorological guideline of the Nuclear Safety Commission of Japan. Tritium concentrations in air and their resultant doses were calculated using the ACUTRI code under some conditions. In order to validate the model, calculations were compared with experimental results.

34000522
Wave propagation properties of framed structures based on the Timoshenko beam theory (in Japanese)
Miyazaki, Akemi
Kozo Kogaku Rombunshu 52B, p.119-124(2006) ; (JAEA-J 00643)

Since it is generally difficult to predict the occurrence of natural disasters such as earthquakes, a performance management system that always maintains the safety and functionalities of structures is required, especially for critical ones like nuclear power plants. In order to realize such a system, it is becoming important to carry out modeling procedures and analyses in detail to better understand the real phenomena. Such details are important in understanding the phenomena occurring in frame structures such as piping systems which are considered to be one of the vulnerable parts in nuclear power plants. The aim of our research is to solve the dynamic behavior of piping systems in nuclear power plants which are complicated assemblages of parts. The spectral element method is adopted in this work and the formulation considering a shear deformation of a frame element is described. The Timoshenko beam theory is introduced for the purpose of this formulation. The validity of the presented element will be shown through comparisons made with the conventional beam.

34000523
Residual stress measurement technique using X-ray and neutron diffraction methods (in Japanese)
Suzuki, Hiroshi
Netsu Shori 46(1), p.11-18(2006) ; (JAEA-J 00644)

34000524
Helium gas turbine of high temperature gas cooled reactor (in Japanese)
Takada, Shoji; Takizuka, Takakazu; Yan, X.; Kunitomi, Kazuhiko
Nippon Gasu Tabin Gakkai-Shi 34(2), p.94-99(2006) ; (JAEA-J 00645)

Gas Turbine High Temperature Gas Reactor GTHTR300 is a direct cycle system in which reactor outlet helium gas at 850^°C is used to drive gas turbine. The design direction was to improve economics by combining existing technologies without breakthrough far from current technology level. The power conversion system design employed non-inter cooled regenerative cycle. The 3-dimensional blade design of the turbine and compressor, in which inlet blade angle was matched with inlet angle of flow, achieved high polytropic efficiencies of 93% and 90%, although they have disadvantages of high boss ratio and stage numbers. As the results of the design, the electric cost was estimated to be below 4 yen/kWh showing the economic competitiveness against LWRs. To establish design method of high efficiency helium gas compressor, a 1/3 scale compressor model aerodynamic performance test was carried out to design the inlet blade angle around the endwall to reduce endwall boundary layer thickness, as well as to modify coefficients of correlations for design. The design of high efficiency helium gas compressor was completed to fulfill the target efficiency of 90.5%.

34000525
Development of sulfuric acid decomposer for thermochemical hydrogen production IS process (in Japanese)
Terada, Atsuhiko; Ota, Hiroyuki; Noguchi, Hiroki; Onuki, Kaoru; Hino, Ryutaro
Nippon Genshiryoku Gakkai Wabun Rombunshi 5(1), p.68-75(2006) ; (JAEA-J 00646)

The Japan Atomic Energy Agency has been conducting R&D on high-temperature gas-cooled reactor (HTGR) technology and also on thermo-chemical water splitting hydrogen production technology by using an iodine-sulfur cycle (IS process) in the high temperature engineering test reactor (HTTR) project. The sulfuric acid (H₂SO₄) decomposer is one of the key equipments in the IS process, in which concentrated sulfuric acid is evaporated and decomposed into SO₃ and H₂O with the heat of high temperature helium gas supplied by HTGR. A concept of the decomposer consisting of multi-block-type heat exchanger made of SiC ceramics was proposed, and its feasibility was examined by preliminary analyses of thermal-hydraulic and structural strength and test-fabrication of SiC block components as well as elementary tests of seal performance in SiC blocks and metal flanges.

34000526
R&D challenges for the 21st century; Development of knowledge management system for geological disposal (in Japanese)
Umeki, Hiroyuki
Nippon Genshiryoku Gakkai-Shi 48(3), p.166-171(2006) ; (JAEA-J 00647)

34000527
Influence of radioluminescence on optically stimulated luminescence from natural quartz grains
Fujita, Hiroki; Hashimoto, Tetsuo*
Radioisotopes 55(3), p.117-123(2006) ; (JAEA-J 00648)

The causes of the different optically stimulated luminescence (OSL) sensitivities for quartz aliquots from different origins were investigated concerning influence of radioluminescence (RL) during artificial irradiation. All RL spectra from red-thermoluminescence (RTL) quartz grains consist of two broad RL emission peaks, assignable to a violet region (V-RL) of a 400 nm peak and a red one (R-RL) of a 630 nm one from an on-line RL-spectrometric analysis. The OSL sensitivities were affected on the total amounts of V-RL intensities during irradiation of a fixed total dose (20 Gy) with different dose rates. Additionally, the bleaching effects of RL with shorter wavelength than blue-region were assured from another experiment with the combination of quartz slices and optical filter. Conclusively, it is suggested that the V-RL emissions appreciably affect the residual or naturally accumulated doses when OSL/SAR protocol was applied.

34000528
Hydrogen isotopes removal from the vacuum vessel using discharges (in Japanese)
Nakamura, Hirofumi; Higashijima, Satoru
Shinku 49(2), p.62-68(2006) ; (JAEA-J 00650)

34000529
Microbeam system for heavy ions from cyclotron to irradiate living cells
Yokota, Wataru; Ohara, Yoshihiro; Arakawa, Kazuo
Proceedings of 36th ICFA Advanced Beam Dynamics Workshop (NANOBEAM 2005) (CD-ROM) , 6p.(2005) ; (JAEA-J 00651)

34000530
Radionuclide releases from UO₂ and MOX fuel under severe accident conditions
Kida, Mitsuko; Kudo, Tamotsu; Nakamura, Takehiko; Fuketa, Toyoshi
Proceedings of Technical Meeting on Severe Accident and Accident Management (CD-ROM) , 10p.(2006) ; (JAEA-J 00653)

34000531
Enhancement of cesium release from fuel due to fuel oxidation and dissolution under severe accident conditions
Kudo, Tamotsu; Nakamura, Takehiko; Kida, Mitsuko; Fuketa, Toyoshi
Proceedings of Technical Meeting on Severe Accident and Accident Management (CD-ROM) , 11p.(2006) ; (JAEA-J 00654)

The radionuclide release from fuel under severe accident conditions was investigated in the VEGA program. In this program, the forth test VEGA-4 was performed in the steam atmosphere using a cladded fuel. The release of cesium from the fuel in the test was slightly larger than that in an inert helium atmosphere of test VEGA-1 which used the same fuel without cladding. Oxidation of UO₂ by steam has been known as an important mechanism, which could increase the volatile fission product release considerably. In addition, considerable amount of fuel liquefaction by the interaction with the cladding was observed in test VEGA-4. The fuel dissolution by molten zircaloy could also affect the fission product release. This report summarizes the test VEGA-4, and impacts on the cesium release from fuel by the UO₂ oxidation and the dissolution are discussed.

34000532
Development of a three-dimensional CDA analysis code; SIMMER-IV, and its first application to reactor case
Yamano, Hidemasa; Fujita, Satoshi; Tobita, Yoshiharu; Sato, Ikken; Niwa, Hajime
Proceedings of Technical Meeting on Severe Accident and Accident Management (CD-ROM) , 12p.(2006) ; (JAEA-J 00655)

For the transition phase analysis of core disruptive accidents, the development of a three-dimensional reactor safety analysis code, SIMMER-IV, has been carried out based on the technology of the two-dimensional SIMMER-III code. The world first application of SIMMER-IV to a small-sized sodium-cooled fast reactor was also attempted to clarify event progression in the early stage of the transition phase. This SIMMER-IV calculation was compared to the two-dimensional case calculated by SIMMER-III, neglecting the presence of control rod guide tubes. The present analysis with the three-dimensional representation suggested that the conventional scenario leading to rather early high-mobility fuel-pool formation is unrealistic and the degraded core tends to keep low mobility in the early stage of transition phase.

34000533
The Result of medium scale in-pile experiment conducted under the EAGLE-project
Konishi, Kensuke; Toyooka, Junichi; Kamiyama, Kenji; Sato, Ikken; Kubo, Shigenobu*; Kotake, Shoji*; Koyama, Kazuya*; Vurim, A. D.*; Gaidaichuk, V. A.*; Pakhnits, A. V.*; Vassiliev, Y. S.*
Proceedings of Technical Meeting on Severe Accident and Accident Management (CD-ROM) , 16p.(2006) ; (JAEA-J 00656)

34000534
A Strategy for the application of steam explosion codes to reactor analysis
Moriyama, Kiyofumi; Nakamura, Hideo
Proceedings of Technical Meeting on Severe Accident and Accident Management (CD-ROM) , 18p.(2006) ; (JAEA-J 00657)

The steam explosion is one of the phenomena that may threat theintegrity of containment vessel during severe accidents of light waterreactors (LWRs), and has been drawing attention in the field of nuclear safety as well as in many other industrial fields for decades. We developed a code, JASMINE, for the assessment of steam explosion impacts on the LWR safety, and applied the code for simulation of steam explosion experiments and also reactor scale parametric studies. Based on the analytical experiences with JASMINE code and aconsideration on the inter-relation among various fundamental aspects in the steam explosion process, we developed a technical view on aproper application of mechanistic steam explosion analysis codes for plant analysis.

34000535
Summary of safety research on the geological disposal of HLW in JAEA; 2001-2005 (in Japanese)
Umeki, Hiroyuki; Osawa, Hideaki; Sonobe, Hitoshi; Miyamoto, Yoichi
Dai-5-Kai Anzen Kenkyu Seika Hokokukai Koenrokushu; Hoshasei Haikibutsu No Chiso Shobun Ni Tsuite , p.5-29(2006) ; (JAEA-J 00658)

34000536
Use of waste structural material of nuclear power facilities, 3 (in Japanese)
Nishio, Shigeru*
Heisei-16-Nendo Zaidan Hojin Wakasawan Enerugi Kenkyu Senta Kenkyu Seika Hokokushu, 7 , p.54-57(2005) ; (JAEA-J 00659)

34000537
Natural analogue study of geological environment (in Japanese)
Sasao, Eiji; Iwatsuki, Teruki; Amano, Yuki
Hoshasei Haikibutsu Anzen Kenkyu Nenji Keikaku (Heisei-13-Nendo~Heisei-17-Nendo) Kenkyu Seika Hokokushu , p.105-110(2006) ; (JAEA-J 00660)

34000538
Model development and validation for groundwater evolution (in Japanese)
Sasamoto, Hiroshi; Kurosawa, Susumu; Isogai, Takeshi*; Yoshikawa, Hideki
Hoshasei Haikibutsu Anzen Kenkyu Nenji Keikaku (Heisei-13-Nendo~Heisei-17-Nendo) Kenkyu Seika Hokokushu , p.146-152(2006) ; (JAEA-J 00661)

34000539
Study on Long-term stability for geological environment (in Japanese)
Nakatsuka, Noboru; Nohara, Tsuyoshi; Umeda, Koji; Moriya, Toshifumi; Asamori, Koichi; Niwa, Masakazu
Hoshasei Haikibutsu Anzen Kenkyu Nenji Keikaku (Heisei-13-Nendo~Heisei-17-Nendo) Kenkyu Seika Hokokushu , p.50-56(2006) ; (JAEA-J 00662)

34000540
Large-scale multi-physics numerical simulations for thermo-hydraulics phenomena of sodium-cooled fast breeder reactors (in Japanese)
Muramatsu, Toshiharu
Nippon Kikai Gakkai Kanto Shibu Dai-12-Ki Sogo Koenkai Koen Rombunshu , p.231-232(2006) ; (JAEA-J 00663)

In-vessel large-scale thermohydraulic analyses for a sodium-cooled fast breeder reactor generating 1500 MWe were carried out using a computer code system for multi-scale and multi-physics simulations to realize optimum upper plenum geometry against free surface behavior. The system consisted of three thermohydraulics computer programs and three thermomechanical computer programs to simulate fluid-structure thermal interaction phenomena in various applications. Furthermore, a response surface methodology was applied to find efficiently the optimum upper plenum geometry. From the large-scale analyses with approximately 1,800,000 computational meshes, it was concluded that the maximum swelling and the maximum horizontal flow velocity at the free surface in an optimal case were decreased largely by 1/3 and one-half, respectively.

34000541
Fluctuations of electron and photon flux by a thundercloud electric field and the runaway air breakdown
Torii, Tatsuo; Sugita, Takeshi*
KEK Proceedings 2005-10 (CD-ROM) , p.27-31(2005) ; (JAEA-J 00667)

The fluctuations on the ground which seemed to be caused by thunderstorm activity have also been detected on the coastal area facing the Sea of Japan during winter thunderstorm activities. Then, assuming the injection of primary cosmic-rays at the upper atmosphere, the generation of secondary cosmic-rays are calculated by the GEANT4 code. Furthermore, in order to simulate the transport of energetic electrons produced by secondary cosmic-rays in a winter thundercloud electric field, we have made a user code of the EGS5 code incorporating the effect of external electric fields. We have also carried out the transport analysis of energetic electrons within and below the thundercloud.As the result, it is confirmed that the electron and photon flux increased rapidly in the region with high electric field. In particular, since the density of electron flux increases greatly in the high field region, it is suggested that the runaway air breakdown can be occurred by the generation of the electromagnetic shower as the result of the injection of energetic radiation.

34000542
Incorporating combinatorial geometry to the EGS5 code and its speed-up
Sugita, Takeshi*; Torii, Tatsuo; Takamura, Atsushi*
KEK Proceedings 2005-10 (CD-ROM) , p.7-21(2005) ; (JAEA-J 00668)

In order to calculate particle transport easily even in the case with various complex geometrical configurations, we have developed a CG (Combinatorial Geometry) user-routine in the EGS5 code. Furthermore, we have improved this routine for speed-up of the calculation. As the result, the calculation speed is several times faster than the original ones speed, and comparable with the speed with the non-CG routine.

34000543
Development of a plant structure integrity monitoring system for a fast reactor based on optical fiber technology (in Japanese)
Matsuba, Kenichi; Kawahara, Hirotaka; Ito, Chikara; Yoshida, Akihiro; Nakai, Satoru
UTNL-R-0453 , p.12_1-12_10(2006) ; (JAEA-J 00669)

34000544
Development of techniques for minor actinides transmutation using fast reactor; Irradiation tests for Am and Np containing fuel in experimental fast reactor JOYO (in Japanese)
Soga, Tomonori; Sekine, Takashi; Takamatsu, Misao; Kitamura, Ryoichi; Aoyama, Takafumi
UTNL-R-0453 , p.13_1-13_8(2006) ; (JAEA-J 00670)

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