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The 22nd RADIOISOTOPES Research Promotion Award for Young Scientists

2018.07.31


M. Kaneko

Dr. Masashi Kaneko of Research Group for Radiochemistry received “The 22nd RADIOISOTOPES Research Promotion Award for Young Scientists” in 5, July 2018. The title of awarded study was “Bonding Study on Trivalent Europium Complexes by Combining Mössbauer Isomer Shifts with Density Functional Calculations” (Radioisotopes, Vol.66, 289-300, (2017)).

Japan Atomic Energy Agency has developed the separation process of long-lived nuclides, especially minor-actinides (MAs), for partitioning and transmutation strategy of high-level liquid waste (HLLW). The awarded study contributed to the elucidation of chemical bonding properties of lanthanides, which are analogues of MAs, by density functional calculations as a part of the development of computational chemical methodology to predict the separation performance of minor-actinides from HLLW. The chemical bonds in a compound can be classified by mainly two classes when considering the property of the interaction between the atoms or ions. One is “ionic bond”, which corresponds to electrostatic interaction between positive and negative charges. The other is “covalent bond”, which corresponds to the electronic interaction between atomic orbitals. However, the existence of the covalent contribution to the chemical bonding in lanthanide compounds has not been understood in detail. In this study, we combined the electron densities calculated by density functional theory and the experimental parameters by previously reported Mössbauer spectroscopy to apply to the chemical bonding analysis in trivalent europium complexes. The result indicated that the electronic contribution of d- and f-orbitals in europium ion to the covalent interaction originates in the strength and weakness of covalency in the europium complexes. We expect that this study contributes to design novel separation material of MAs from lanthanides as well as to elucidate and predict the separation behavior of MAs from lanthanides.

2017 Atomic Energy Society of Japan Distinguished Technical Award

2018.05.01


K. Tada, S. Kunieda

Dr. Kenichi Tada, a researcher of research group for reactor physics and standard nuclear code system, and Dr. Satoshi Kunieda, an assistant principal researcher of nuclear data center, received the Prize of “Atomic Energy Society of Japan Distinguished Technical Award 2017” for the work entitled “Development of Advanced Nuclear Data Processing System FRENDY”.

Japan Atomic Energy Agency (JAEA) has been developing the database on the reaction probability (cross-section) between neutron and nuclide, i.e., an evaluated nuclear data file JENDL (Japanese Evaluated Nuclear Data Library) and such particle transport simulation programs as PHITS and MVP. These are widely used in numerous institutes including research laboratories.

In advance executing particle transport simulation programs, we need a step processing nuclear data library.

In Japan, we have been using the nuclear data processing systems developed by foreign countries. However, we have been suffering the difficulty when making the cross-section data libraries from JENDL. There is serious concern about the export control by other countries becomes more strict, which prevent us from using foreign computer codes. Since this problem has also been pointed out in other countries as well as in Japan, development of the domestic nuclear data processing system is strongly recognized as one of the most important issues in the field of the computer program development and utilization.

Doctors Tada and Kunieda have been developed the purely domestic nuclear data processing system FREDNY, not only for resolving the problem mentioned above but also for ensuring maintainability and extensibility. They succeeded further sophisticated process of the nuclear data library as well as resolved problems funded in the widely used nuclear data processing system.

By achievement of these technical developments, it is expected that FREDNY is widely used in many countries, not limited to Japan.

The 13th The Reprocessing and Recycle Technology Division Award of Atomic Energy Society of Japan, Achievement Award

2018.04.26


T. Matsumura, K. Tsujimoto

Dr. Kazufumi Tsujimoto of Partitioning and Transmutation technology Division, Dr. Tatsuro Matsumura of research Group for Partitioning and Dr. Takumi Sato of Research Group Nuclear Science and Engineering Center was awarded the Achievement Award of the 13th The Reprocessing and Recycle Technology Division Award of Atomic Energy Society of Japan on March 28, 2018. This was awarded for the publication on the textbook of nuclear fuel cycle.

Dr. Tsujimoto, Dr. Matsumura and Dr. Sato wrote the sections of “Significance of Partitioning and Transmutation” and “ADS fuel cycle” in “Chapter 8 Partitioning and Transmutation” in the textbook. This textbook was written about the scientific and objective information of the fuel cycle to send to the general public. This has been published on the internet.

The 50th AESJ Best Paper Award from the Atomic Energy Society of Japan

2018.04.23


N. Iwamoto, O. Iwamoto

Drs. Nobuyuki Iwamoto and Osamu Iwamoto of Nuclear Data Center received the 50th AESJ Best Paper Award from the Atomic Energy Society of Japan for the paper entitled, "Correction of the thermal neutron capture cross section of 241Am obtained by the Westcott convection, Journal of Nuclear Science and Technology, Vol.54, No.1, pp.74-80 (2017).,” on the 27th of March 2018.

Accuracy improvement of neutron capture cross section of 241Am is one of the important issues for the design of nuclear transmutation system of minor actinides. However, there had existed large discrepancies among the measured thermal neutron capture cross sections reported previously. The activation measurements with the Cd-ratio method, which was used to derive the thermal capture cross section, had shown a trend of overestimation, compared with the other methods. In this work, we quantified the influence of resonances below the Cd cut-off energy on the Westcott convention often used in activation measurements, and developed a method to correct it in the derivation of cross section. By applying our correction method to the previously measured data, we have succeeded to improve the discrepancies among the cross sections significantly. It is expected that the accuracy of thermal capture cross section for other nuclides with low-energy resonances becomes better.

The 50th Award for Distinguished Technology from the Atomic Energy Society of Japan

2018.04.23


T.Furuta, D.Satoh, F.Takahashi

Dr. Daiki Satoh, Dr. Takuya Furuta, and Dr. Fumiaki Takahashi of Research Group for Radiation Transport Analysis received the 50th Award for Distinguished Technology from the Atomic Energy Society of Japan for the technology entitled "Development of a dose-assessment method for external exposure of the public to radiations from radioactive cesium distributed in the environment", on 27 March 2018.

The recipients of the award developed a high-efficiency simulation technique of radiation transport in the environment modeled by semi-infinite air and soil layers contaminated with radioactive cesium. Using the technique, they evaluated the coefficients to convert the activity concentration of radioactive cesium to the age-dependent effective dose. A rationality of radiation protection for the public based on radiation monitoring in the contaminated environment was also confirmed quantitatively by clarifying the relationship between the effective dose and the monitoring doses, that is ambient dose equivalent and personal dose equivalent. In addition, they analyzed the indoor dose reduction rate systematically for typical Japanese houses and buildings to assess the individual dose reflecting residents' lifestyle. The results have been used in establishing medium- and long-term activities for the return of residents to the areas affected by the nuclear accident of the Fukushima Diichi Nuclear Power Plant.

JNST Most Cited Article Award 2017

2018.04.23


K.Furutaka, N.Iwamoto, O.Iwamoto
A.Ichihara, K.Shibata, S.Kunieda

The JNST Most Cited Article Award 2017 was presented to the paper of K. Shibata et al. (Nuclear Data Center) entitled “JENDL-4.0: A New Library for Nuclear Science and Engineering” (J. Nucl. Sci. Technol., Vol.48, 1-30 (2011), which has been frequently cited during the first 5 years since its publication.

The paper describes the development of JENDL-4.0 and its data characteristics. This work received the Technical Award with a Special Prize from the Atomic Energy Society of Japan in FY2011. Improvement of evaluated data was performed by using the latest experimental data and reliable theoretical predictions. In addition to neutron-induced reaction data, we prepared other data such as fission-product yields. Those data are disseminated to users worldwide via the Internet. The data can be downloaded from the following URL: http://wwwndc.jaea.go.jp/jendl/j40/j40.html

JNST Most Cited Article Award 2017

2018.04.23


H. Terada, H. Nakayama, H. Nagai

Dr. Masamichi Chino, former Director General of Nuclear Science and Engineering Center and co-authors of Research Group for Environmental Science received the Prize of “JNST Most Cited Article Award 2017” for the paper entitled, “Preliminary Estimation of Release Amounts of 131I and 137Cs Accidentally Discharged from the Fukushima Daiichi Nuclear Power Plant into the Atmosphere” (J. Nucl. Sci. Technol., Vol.48, 1129-1134, 2011).

The Fukushima Daiichi nuclear power plant accident in Japan caused the month-long discharge of radioactive materials into the atmosphere. It was urgent to assess the radiological dose to the public resulting from this release. In this study, we estimated the release rates of radionuclides by coupling environmental monitoring data with atmospheric dispersion simulations, assuming unit release rate. We clarified it for the period from 12 March to 5 April 2011 for the first time in the world. The estimated results of the release rates were utilized as reference data in many analyses to reconstruct the process of atmospheric release and dispersion by domestic and foreign institutes.

JNST Most Cited Article Award

2018.04.23


H. Kawamura

Dr. Hideyuki Kawamura of Research Group for Environmental Science received the Prize of “JNST Most Cited Article Award” for the paper entitled “Preliminary Numerical Experiments on Oceanic Dispersion of 131I and 137Cs Discharged into the Ocean because of the Fukushima Daiichi Nuclear Power Plant Disaster” (J. Nucl. Sci. Technol., Vol. 48, 1349–1356 (2011)).

In this study, we estimated the amount of radionuclides released directly into the ocean because of the Fukushima Daiichi Nuclear Power Plant Disaster and carried out oceanic dispersion simulations to understand the impact of the released radionuclides on the marine environment. The direct release amount into the ocean was estimated based on observed radionuclide concentrations in sea water. The estimated result and the deposition amount at the sea surface calculated by atmospheric dispersion simulations were taken into account as the source term of the radionuclides in the oceanic dispersion simulations. The simulated radionuclide concentrations relatively well agreed with the radionuclide concentrations observed in seawater in the coastal ocean near Fukushima Prefecture. It was indicated that the radionuclides released directly into the ocean mainly dispersed along the coast in the south and subsequently dispersed in the east by Kuroshio current.

JNST Most Popular Article Award 2017

2018.04.23


J. Koarashi

Dr. Jun Koarashi of Research Group for Environmental Science received the Prize of “JNST Most Popular Article Award 2017” for the paper entitled, “Atmospheric discharge of 14C from the Tokai reprocessing plant: comprehensive chronology and environmental impact assessment” (J. Nucl. Sci. Technol., Vol. 53, 546-553 (2016)).

In this study, Dr. Koarashi and his colleagues found a strong correlation between the monthly amounts of atmospheric 14C discharge and spent fuel reprocessed at the Tokai reprocessing plant (TRP), and on the basis of the correlation, established the complete chronology of atmospheric 14C discharges from the TRP over the entire operation period (1977-2014) for the first time. They also assessed 14C activity concentration levels around the TRP in the past using tree-ring 14C analysis and model calculations with the established 14C discharges, and successfully demonstrated that atmospheric 14C discharges form the TRP had only a very slight radiological impact on the environment and public throughout the entire operation period.

The 28th Thermal Hydraulics Division Award of Atomic Energy Society of Japan, Encouragement Award

2018.04.23


S. Uesawa

Dr. Shinichiro Uesawa of Nuclear Science and Engineering Center was awarded the Encouragement Award of the 28th Thermal Hydraulics Division Award of Atomic Energy Society of Japan on March 27, 2018. This was awarded for the study on heat transfer behavior of seawater in a reactor vessel to evaluate a thermal fluid behavior during the accident at the Fukushima Daiichi nuclear power station.

Dr. Uesawa performed the heat-transfer experiment with seawater, including boiling conditions, in order to understand the influence of seawater on the heat transfer behavior, which is required to simulate a heat up process during the accident of the Fukushima Daiichi Nuclear Power station. The obtained results are useful not only for evaluating the accident, but also for improvements safety and accident management of light water reactors. In addition, effects of deposited seawater components on the boiling behavior and the heat transfer performance were clarified. This award was sent for these results included new knowledge in academic terms as well.

Award for Encouragement of Research in Materials Science in the 27th Annual Meeting of The Materials Research Society of Japan (MRS-J)

2018.04.23


T. Tsuru

Dr. Tomohito Tsuru of research group for radiation materials engineering received “Award for Encouragement of Research in Materials Science in the 27th Annual Meeting of The Materials Research Society of Japan (MRS-J)” on 7 December, 2017.

The recipient of the award has established a non-empirical approach for the materials behavior such elongation and fracture. In conjunction with both experiment and interfacial fracture mechanics, electronic structure calculations were implemented via supercomputer system in JAEA to evaluate the effect of solute elements on interfacial segregation and fracture in Mg alloys. Based on the assumption of brittle fracture in Mg alloys, the interfacial separation caused by segregated solutes in Mg can be efficiently described by the energy-based criterion of fracture, which is in good agreement with the fracture toughness obtained by experimental tests of Mg–M binary alloys. Further analysis for the electronic structures elucidated that the electronic interaction—that is, the change in the electronic state between the interface and surface—mainly influences the ideal work of separation regardless of the type of interface.

Award for contribution to the work of the International Commission on Radiological Protection (ICRP)

2017.12.15


A. Endo

Dr. Akira Endo, a Deputy Director General of Nuclear Science and Engineering Center, received a plaque from the International Commission on Radiological Protection (ICRP) as an honor for his contribution in the development of ICRP Publication entitled “ICRP Publication 133: The ICRP Computational Framework for Internal Dose Assessment for Reference Adults: Specific Absorbed Fractions” (ICRP133) used for international radiological protection guidelines.

Since 1928, ICRP has developed the international system of radiological protection used as the common basis for protection of humans and the environment. ICRP133 provides the technical basis for assessment of internal doses from intakes of radionuclides. The Publication is used for the development of dose coefficients and limits for the intake of radionuclides required for the implementation of the Commission’s recommendations.

Dr. Endo contributed to the development of ICRP133 using the general purpose Monte Carlo particle and heavy ion transport code system PHITS and the Japanese Evaluated Nuclear Data Library JENDL-4, which are both being developed in Nuclear Science and Engineering Center.

Dr. Endo has been working for ICRP since 2002 and contributed to the development of three ICRP Publications. These Publications have been utilized for the development of reference data for dose assessment adopted world-wide as the basis for radiological protection standards and practice, such as Federal Guidance of the United States and Council Directive of the European Union for radiological protection. ICRP113 will be used in various applications in radiological protection, nuclear medicine, and so on.

Best Presentation Award of RSC Tokyo International Conference 2017

2017.10.16


S. Asai

Dr. Shiho Asai, a researcher at Research Group for Analytical Chemistry was awarded Best Presentation Award of RSC Tokyo International Conference 2017. The conference was jointly organized by the Royal Society of Chemistry and JAIMA (JAPAN Analytical Instruments Manufacturers’ Association). The title of the poster presentation awarded was “Direct measurement of Pd-107 in Pd metal recovered from spent nuclear fuel with laser ablation ICP-MS”.

The presentation covered a newly developed analytical technique for Pd-107. The technique utilizes laser-induced photoreduction that provides preferential precipitation of Pd. Because of its highly-selective and non-contact separation capability, the developed technique can be suitable for highly radioactive samples, such as spent nuclear fuel. The resulting Pd precipitates can be converted into tiny particles by laser-ablation, which enables direct measurement of Pd-107 with a mass spectrometer. It eliminates time-consuming preparation steps. With those distinctive features, the significance of the developed technique was appreciated in the field of analytical chemistry and the “Best Presentation Award” was given. Now, applications of the developed technique to other samples, for example, high level radioactive waste (HLW), is expected.

The Japanese Society for Multiphase Flow Award 2016, Award for Distinguished Technology

2017.09.29


H. Yoshida

Dr. Hiroyuki Yoshida of Nuclear Science and Engineering Center was awarded Award for Distinguished Technology of the Japanese Society for Multiphase Flow Award 2016 on August 20, 2017. This was awarded for the development of detailed two-phase flow simulation code: TPFIT.

Dr. Yoshida constructed new simulation technique to resolve numerical diffusion at the gas-liquid interface. The numerical diffusion at the gas-liquid interface is one of the most important issues to simulate detailed gas-liquid two-phase flow behavior precisely. Based on constructed simulation technique, he developed new gas-liquid two-phase flow simulation code: TPFIT. The TPFIT was applied to fluid mixing phenomena that is important phenomena for the design of nuclear reactor fuels. Gas-liquid two-phase flow appeared in various equipment and system, such as electric power plant systems, the TPFIT can be applied to clarify phenomena that include gas-liquid interface.

Award of Industrial Machinery Chemical Safety Department of the Japan Society of Mechanical Engineers 2016

2017.06.01


K. Oba

Ms. Kyoko Oba of Nuclear Science and Engineering Center was awarded Thesis Award of the Industrial Machinery Chemical Safety Department of the Japan Society of Mechanical Engineers 2016 on May 17, 2017. This was awarded to the lecture paper "Business Continuity Plan and Resilience Engineering (Consideration for Enhancement of Disaster Prevention and Mitigation Based on Case Studies of Great East Japan Earthquake)" at the Annual Meeting of the Japan Society of Mechanical Engineers 2016.

Ms. Oba extracted the elements necessary for the Business Continuity Plan (BCP), whose importance has been further pointed out since the Great East Japan Earthquake that caused much damage due to earthquakes and tsunamis far beyond preparations in advance. For this extraction, she analyzed cases of medical, civil engineering (road), and nuclear response, which helped to speed up the recovery of damaged or damaged areas in the Great East Japan Earthquake, referring to the concept of resilience engineering. Since the extracted element is an element common to a number of fields, it can be said that it is a lesson useful for disaster prevention or reduction of various social and technical systems.

The Young Scientists' Prize for the Commendation for Science and Technology by the Minister of Education, Culture, Sports, Science and Technology in 2017

2017.04.20


T. Tsuru

Dr. Tomohito Tsuru of research group for radiation materials engineering received “The Young Scientists' Prize for the Commendation for Science and Technology by the Minister of Education, Culture, Sports, Science and Technology in 2017” on 19 April, 2017.

The recipient of the award focused on the defect structures determining mechanical properties of materials and developed massively parallel atomistic simulations method. Taking advantage of super computer system in JAEA, he implemented large scale simulations of several hundred million atoms and revealed the fundamental dynamic behavior of defect structures. In addition, elements strategy becomes important to investigate alternative materials of rare metals. He dedicated to establish a new approach based on computational methods based on first-principles and elasticity theory of dislocations.

2017 AESJ Thesis Award

2017.04.10


K. Yokoyama

Mr. Kenji Yokoyama of research group for reactor physics and standard nuclear code system and professor Akio Yamamoto of graduate school of engineering, Nagoya university, received the 49th “Thesis Award” from the Atomic Energy Society of Japan for the paper entitled, "Cross-section adjustment methods based on minimum variance unbiased estimation,” on 28 March 2017.

In order to improve the safety and economy of nuclear reactors, it is necessary to improve the prediction accuracy by calculation through quantification of the uncertainty induced by the nuclear reaction probability data, i.e., nuclear data between neutron and nuclide in nuclear design analysis. As one of the measures, the cross-section adjustment method has been used from long time ago. In this research, a theoretical formula of the cross-section adjustment method was newly derived based on the minimum variance unbiased estimation, not the maximum likelihood estimation that was conventionally used. By this derivation, the authors showed for the first time that the theoretical formulas of the extended bias factor method and the cross-section adjustment method, which had been thought to be different theories, can be unified. This result could be a fundamental theory of the cross-section adjustment method under various conditions. We expect that the application of the cross-section adjustment method would be expanded to the great extent.

2016 AESJ Special Award for Distinguished Technology

2017.04.05


A. Ohzu, M. Kureta, S. Nakashima, M. komeda, Y. Nakatsuka

Dr. Akira Ohzu, Dr. Masao Komeda, and Dr. Masatoshi Kureta of Research Group for Nuclear Sensing, and Mr. Shinichi Nakajima and Mr. Yoshiaki Nakatsuka of Ningyo-toge Environmental Engineering Center, received the 49th Special Award for Distinguished Technology from the Atomic Energy Society of Japan for the technology entitled, " Advanced non-destructive assay technique for accurate determination of uranium mass contained in actual radioactive waste drum ", on 28 March 2017.

The recipients of the award developed an innovative correction method that is utilized in the measurements of nuclear materials by the fast neutron direct interrogation technique, and established as the accurate method that is not affected by the contents of waste drums. They successfully designed and installed a non-destructive assay system (JAWAS-N, JAEA Active Waste Assay System-Ningyo) at NIngyo-toge environmental engineering center (NEEC) site in JAEA. In addition, their studies demonstrated the effectiveness of the method using simulated waste drums which contained many kinds of solid materials. As the result, the ability of JAWAS-N as a measurement device for nuclear material accountancy has been highly regarded by IAEA, and therefore JAWAS-N was started to measure waste drums. At present, JAWAS-N has been put to practical use for uranium accountancy of actual waste drums which are filled with a variety of matrix, such as dismantling metal waste and solid uranium absorbent, etc.

JNST Most Popular Article Award 2016

2017.04.03


T. Kobayashi

Dr. Takuya Kobayashi of Research Group for Environmental Science received the Prize of “JNST Most Popular Article Award 2016” for the paper entitled, “Development of ocean dispersion concentration maps of the contaminated water released from the Fukushima Dai-ichi Nuclear Power Plant” (J. Nucl. Sci. Technol., Vol.52, 769-772 (2015)).

In this study, ocean dispersion concentration maps were developed to gain an understanding of the migration behavior of contaminated water leaking from the Fukushima Dai-ichi Nuclear Power Plant. The authors used ensemble mean values to define the semi-climatological seasonal field in calculations of the trajectories of the contaminated water. The maps were validated by comparing with actual release events in two different seasons. The results showed that the proposed method, despite its simplicity, yield relatively good reproducibility of the measurements.

Jun Koarashi receives Award for Eminent Achievements in Nuclear Science and Technology

2017.04.03


J. Koarashi

Dr. Jun Koarashi of Research Group for Environmental Science received the “Award for Eminent Achievements in Nuclear Science and Technology” on 28 March 2017, from the Atomic Energy Society of Japan (AESJ), for his comprehensive study on the behavior of radiocarbon in the terrestrial environment: atmospheric discharge from nuclear facilities, environmental behavior, and radioecological impact assessment.

Of the radionuclides discharged from the nuclear fuel cycle, radiocarbon (14C) is of particular interest from the perspective of dose estimation because of the role of carbon in the metabolism of all life forms. Dr. Koarashi has developed a variety of research methodologies that enables us to evaluate the atmospheric discharge of 14C from nuclear facilities and understand the behavior of 14C in the terrestrial environment. Using these methodologies, he obtained 14C data in and around the Tokai reprocessing plant for many years, and successfully characterized spatiotemporal atmospheric dispersion and vegetation uptake of 14C and thereby assessed the radioecological impact of the 38-year operation of the reprocessing plant. He also developed a scenario to test environmental 14C models on the basis of the observation data, and with the scenario, he led the first 14C-modelling exercise in the framework of the IAEA’s EMRAS program to establish the confidence in the predictions of environmental 14C models. He has also succeeded in revealing the long-term (over several decades) accumulation and cycling behavior of 14C in the terrestrial environment, using a new, bomb-14C tracer approach. Hence, this prize was awarded for his significant achievements in nuclear science and technology, particularly in the research field related to nuclear safety and environmental assessments.

Encouragement Award 2016 of The Japan Society of Nuclear and Radiochemical Sciences

2016.09.29


M. Kaneko

Dr. Masashi Kaneko (research group for radiochemistry) was awarded "Encouragement Award 2016 of The Japan Society of Nuclear and Radiochemical Sciences" in 11, September 2016. The title of awarded study was "Bonding study on d, f-block complexes using Mössbauer spectroscopic parameters and density functional theory."

The study contributed to the optimization of computational and analytical methods and to the precision of the theoretical calculations in order to evaluate the bonding properties of metal complexes including minor-actinides (MA) and lanthanides (Ln) ions being important for the development of partitioning and transmutation. It has been required to theoretically estimate the chemical bonding of MA or Ln ions with separation reagents and to elucidate the difference in their bonding properties for understanding MA/Ln separation behavior, leading to the development of the novel separation reagents with high selectivity toward MA ions. Density functional theory (DFT) has been useful to describe the electronic states of metal complexes, but should be discussed more carefully to estimate the bonding nature in f-block compounds including MA or Ln complexes. In this study, the computational model was optimized by means of benchmarking with Mössbauer spectroscopic parameters and the analytical method was indicated to precisely estimate the bonding properties of MA and Ln complexes. Furthermore, applying the present procedure to MA/Ln separation, it was suggested that the difference of covalent interaction with separation reagent between MA and Ln ions attributed to the selectivity of MA and Ln ions.

2016 JSCE Award for Go Okamoto's Memorial Lecture

2016.07.15


M. Yamamoto

Dr. Masahiro Yamamoto, Deputy Director General, have received "2016 JSCE Award for Go Okamoto's Memorial Lecture" from Japan Society of Corrosion Engineering (JSCE) on 26 May 2016. The prize is awarded for his significant achievement in the field of corrosion engineering. He gave a lecture titled "Estimation of corrosion mechanisms from the data obtained by the reproduced experiments considering the actual environments - Maritime structures and nuclear facilities" to participants of JSCE Materials and Environments 2016.

This prize was awarded for his research achievements of the elucidation of corrosion mechanisms in the conditions such as maritime structures in seawater, nuclear power plant structural materials in high-temperature high-pressure water, and nuclear fuel reprocessing plant materials in nitric acid solutions. Since he has made significant achievements in the academic progress and development in the field of corrosion, he was selected to the instructor to perform the prestigious lecture to increase the knowledge and interest of JSCE members.

2016 JSCE Thesis Award

2016.07.15


M. Yamamoto, T. Motooka, A. Komatsu,
F. Ueno, M. Makino(Ascend Co., Ltd.)

Dr. Atsushi Komatsu of Research Group for Corrosion Resistant Materials, Dr. Takafumi Motooka of Collaborative Laboratories for Advanced Decommissioning Science, Dr. Fumiyoshi Ueno of Fuels and Materials Engineering Division and Dr. Masahiro Yamamoto of Nuclear Science and Engineering Center received "2016 JSCE Thesis Award" from Japan Society of Corrosion Engineering (JSCE) for the paper titled "Effect of local segregation of phosphorous on intergranular corrosion of type 310 stainless steel in boiling nitric acid" (Zairyo-to-Kankyo, Vol.63, No.3, pp98-103 (2014)) on 26 May 2016.

In this paper, authors revealed the effect of phosphorus distribution at grain boundaries on corrosion of stainless steel in boiling nitric acid solution. Formerly, it had been significantly difficult to detect very small amount of phosphorus in grain boundary. Authors applied the electrochemical method to corrode very slightly under control of corrosion potential and quantity of electricity, and also applied the nanoscopic techniques of sample machining and elemental analysis. Using these methods, intergranular corrosion was understood to occur at the grain boundary where phosphorus concentrated.

2016 JSCE Technology Award

2016.07.15


C. Kato

Dr. Chiaki Kato of Research Group for Corrosion Resistant Materials received "2016 JSCE Technology Award" from Japan Society of Corrosion Engineering (JSCE) on 26 May 2016. The Prize is awarded for "Formalization and revision of standards of the methods of stress corrosion cracking test in high-purity water at high temperatures¡É.

This award was presented to the contribution for developing JSCE standard testing to evaluate the stress corrosion cracking (SCC) in high temperature water simulated for light water reactor environments, as the board of commissioner for establishing standard tests of JSCE. This standard test method for uniaxial constant load testing in high-purity water at high temperatures is standardized as JSCE standard (JSCE S1501: 2015 "Method of uniaxial constant load test for evaluating time to failure of metals and alloys due to stress corrosion cracking in high-purity water at high temperatures") that define the test methods such as test environment, the test procedure due to no common testing method standardized between many institutes. Moreover, the Japanese industrial standard (JIS G0511 "Stress corrosion cracking testing of metals and alloys using reverse U-bend test method"), that was the reverse U-bending test method for evaluating SCC in PWR primary water originated by JSCE, was revised. It is expected that these standards be applied in the technical testing procedure for evaluating the SCC initiation in the high-temperature water.

2016 JSCE Young Scientist Award

2016.07.15


A. Komatsu

Dr. Atsushi Komatsu of Research Group for Corrosion Resistant Materials received "2016 JSCE Young Scientist Award" from Japan Society of Corrosion Engineering (JSCE) for study on corrosion mechanism of nuclear materials using electrochemical method on 26 May 2016.

This award was given for his research achievement of the elucidation of corrosion mechanism of nuclear materials using electrochemical techniques. For an example, he studied the corrosion mechanism of titanium in boiling nitric acid, or studied the effect of phosphorus distribution at grain boundaries on intergranular corrosion of stainless steel in transpassive region. Especially, he studied about the reduction mechanism of nitric acid on titanium to reveal why titanium corroded in nitric acid solution. He revealed the reduction of titanium oxide had an important role in reduction of nitric acid and suggested the reduction of titanium oxide was the reason why titanium corroded in nitric acid solution.

The Prize for Science and Technology by the Minister of Education, Culture, Sports, Science and Technology

2016.05.18


A. Kimura, H. Harada, Y. Toh

Dr. Hideo Harada, Division Head, Dr. Atsushi Kimura, Assistant Principal Researcher, and Dr. Yosuke Toh, Principal Researcher, have received the Prize for Science and Technology (Research Category) of the 2016 Commendation for Science and Technology by the Minister of Education, Culture, Sports, Science and Technology. The Prize is awarded for " Developments of innovative neutron resonance spectroscopy and its applications" on 20 April 2016.
Highlights of achievements: Click here.

The 2016 Thesis Award

2016.05.18


T. Matsunaga, K. Tsuduki, N. Yanase

Dr. Takeshi Matsunaga and Dr. Katsunori Tsuduki of Research Group for Environmental Science, and Dr. Nobuyuki Yanase of Research Group for Green Chemistry received "Thesis Awarded" from the Atomic Energy Society of Japan for the paper entitled, "Increase in rare earth element concentrations controlled by dissolved organic matter in river water during rainfall events in a temperate, small forested catchment" (J. Nucl. Sci. Technol., Vol.52, 514-529 (2015)) on 27 March 2016.

This paper contributed to clarify the migration behavior of transuranic elements (TRU) in the natural environment, by use of rare earth elements (REEs) which exhibit chemical similarity to TRU. There is a general difficulty to use the nuclear bomb test derived TRU in their environmental behavior research because of their limited presence on the ground. The authors have shown a scheme that a part of dissolved REEs (surrogates of TRU) in soil water migrate into adjacent river water in a form combined with dissolved natural organic matter during rainfall events. This dynamic scheme is based on repeated field observations with fine temporal increments. This study suggests that mobile TRU in the soil-water environment can be largely controlled by the natural organic matter (humic substances).

2015 AESJ Award for Encouragement

2016.05.18


S. Abe

Dr. Shin-ichiro Abe of Research Group for Radiation Transport Analysis received "2015 AESJ Award for Encouragement" from the Atomic Energy Society of Japan (AESJ) for ¡ÈImprovement of a simulation technique for radiation-induced temporal malfunction on electronic devices¡É on 27 March 2016.

In the study concerning the award, models were developed in order to evaluate a rate of radiation-induced temporal malfunction (so-called soft error rate, SER) in a microelectronic device. It is important to improve accuracy and computational speed for radiation-induced nuclear reaction in device and charge collection models for SER analysis. An algorithm of deposited energy calculation with forced collision method was constructed to improve computational speed for the calculation of nuclear reaction by Particle and Heavy Ion Transport code System PHITS. As a model for collected charge calculation, the multiple sensitive volume (MSV) model was developed to take into account for spatial dependence of the charge collection efficiency. Finally, a model combining MSV with PHITS (PHITS+MSV) was established for soft error analysis.

The 2016 Thesis Award

2016.05.18


K. Shibata

Dr. Keiichi Shibata of Nuclear Data Center received a Thesis Award from the Atomic Energy Society of Japan for the paper entitled, ¡ÈEvaluation of Neutron Nuclear Data on Iodine Isotopes¡É (J. Nucl. Sci. Technol. Vol. 52, 1174-1185 (2015)) on the 27th of March 2016.

The Japan Atomic Energy Agency (JAEA) released the evaluated nuclear data library JENDL-4.0, which contains data for 406 nuclides, in 2010. After that, we have continued to evaluate fission product (FP) data. The paper deals with evaluation of neutron cross-sections of iodine-127, 128, 129, 130, 131, 135 in the energy region from 10^-5 eV to 20 MeV. In the energy region above resonances, we used a nuclear reaction model code developed in JAEA together with optimized model parameters. As a result, the present evaluation reproduces the measurements for iodine-127, 129, and it is much better than JENDL-4.0 and other libraries. The use of sophisticated nuclear reaction models and optimized parameters leads to improvements of iodine-128, 130, 131, 135 data for which measurements are few. The presently evaluated data will be compiled into the next release of JENDL, and utilized for the development of nuclear energy and other applications.
eprint: http://www.tandfonline.com/eprint/KBrWnz3y63DzkvI5RGdU/full.

JNST Most Cited Article Award 2015

2016.05.18


O. Iwamoto

JNST Most Cited Article Award 2015 was presented to the paper of Osamu Iwamoto et al. in Nuclear Data Center, entitled "JENDL Actinoid File 2008" published in JNST Vol. 46, page 510-528, 2009 for being frequently cited during the first 5 years after its publication.

The paper described the evaluated nuclear data file, JENDL Actinoid File 2008, which was released in March 2008. It included the nuclear data of neutron-induced reactions for 79 actinide nuclides extensively updated based on a newly developed nuclear reaction model code CCONE and the latest experimental data. It is expected to improve accuracies to simulate nuclear reactors with this file. Its major part is adopted by the latest general purpose file JENDL-4.0 released in 2010.
The data can be downloaded from http://wwwndc.jaea.go.jp/ftpnd/jendl/jendl-ac-2008.html.

2016 AESJ Award for Distinguished Technology Development

2016.05.18


M. Koizumi, P. Schillebeeck, H. Harada

On 27 March 2016, the 48th Award for Distinguished Technology Development of the Atomic Energy Society of Japan was presented to the joint NRD (Neutron Resonance Densitometry) development team for their work of "Development of Neutron Resonance Densitometry for Accounting Nuclear Materials with Complex Geometries and Compositions". The team was composed of researchers from JAEA-NSEC (Nuclear Science and Engineering Center), EC-JRC-IRMM (Institute for Reference Materials and Measurement) and JAEA-ISCN (Integrated Support Center for Nuclear Nonproliferation and Nuclear Security). Drs. H. Harada (JAEA-NSEC), P. Schillebeeckx (EC-JRC-IRMM), and M. Koizumi (JAEA-ISCN) received the commendation plaque on behalf of the joint NRD development team.
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