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Journal Articles

Good practices of the online training on physical protection of nuclear materials and facility

Noro, Naoko; Scharmer, C.*; Kawakubo, Yoko; Sekine, Megumi; Okuda, Masahiro; Inoue, Naoko

Proceedings of INMM & ESARDA Joint Annual Meeting (Internet), 10 Pages, 2021/08

In the amid of COVID-19 pandemic, Integrated Support Center for Nuclear Nonproliferation and Nuclear Security (ISCN) of Japan Atomic Energy Agency (JAEA) developed and conducted regional training course on physical protection of nuclear materials and facility (PP RTC) for Asian countries in October 19-30, 2020 as an online course. Maintaining the quality of in-person two-week training through online platforms was a big challenge. For effective learning, ISCN combined e-learning (self-study) and interactive learning (virtual classroom) for its online PP RTC, and engaged participants through group exercise via Zoom meeting. The paper will describe efforts of ISCN and SNL to develop the online curriculum of PP RTC and share lessons learned and good practices for course development and course implementation. The paper will also explore future application of online contents in nuclear security capacity building even after the pandemic.

Journal Articles

Conducting an online workshop on the supply chain risk in nuclear security; A Case study of designing an online event using recorded theater scene and integrating its findings for professional development

Okuda, Masahiro; Van Dassen, L.*; Lock, B.*; Inoue, Naoko; Noro, Naoko; Kawakubo, Yoko; Sekine, Megumi

Proceedings of INMM & ESARDA Joint Annual Meeting (Internet), 9 Pages, 2021/08

Journal Articles

Development and implementation of online trainings at ISCN/JAEA

Inoue, Naoko; Noro, Naoko; Kawakubo, Yoko; Sekine, Megumi; Okuda, Masahiro; Hasegawa, Nobuhiko*; Naoi, Yosuke

Proceedings of INMM & ESARDA Joint Annual Meeting (Internet), 10 Pages, 2021/08

Integrated Support Center for Nuclear Nonproliferation and Nuclear Security (ISCN) of Japan Atomic Energy Agency (JAEA) celebrated its 10th anniversary in December 2020. One of its pillars is capacity building support mainly to Asian countries. 183 trainings were implemented with more than 4,600 participants since its establishment, however, the COVID-19 pandemic impacted in the implementation of the trainings. ISCN/JAEA has started to develop the online trainings since April 2020, and implemented two regional trainings, Physical Protection and State System of Accounting for and Control (SSAC) for IAEA Safeguards in October and November 2020, respectively. The efforts continue in further development of trainings/workshops, including the regional training on Additional Protocol for IAEA Safeguards Agreement Commodity Identification Training, and other two national workshops with foreign instructors. Online training can provide not only training opportunities for those who have difficulty in traveling for security and safety reasons including under the travel restriction by COVID-19 pandemic, but also could serve in making them more effective and efficient, especially by the combination with in-person trainings. The pandemic, as a result, accelerate ISCN/JAEA to develop and implement the online trainings, which key is the international collaboration with the partners including IAEA, DOE/NNSA and Sandia National Laboratories and International Nuclear Nonproliferation and Security Academy (INSA) of the Korea Institute of Nuclear Nonproliferation and Control (KINAC). This paper will provide the efforts of ISCN/JAEA how to address the online training development and implementation, current status, lesson learned, and future plan.

Journal Articles

Dynamics of proteins with different molecular structures under solution condition

Inoue, Rintaro*; Oda, Takashi*; Nakagawa, Hiroshi; Tominaga, Taiki*; Saio, Tomohide*; Kawakita, Yukinobu; Shimizu, Masahiro*; Okuda, Aya*; Morishima, Ken*; Sato, Nobuhiro*; et al.

Scientific Reports (Internet), 10, p.21678_1 - 21678_10, 2020/12

 Times Cited Count:0 Percentile:0(Multidisciplinary Sciences)

Incoherent quasielastic neutron scattering (iQENS) is a fascinating technique for investigating the internal dynamics of protein. However, both low flux of neutron beam and absence of analytical procedure for extracting the internal dynamics from iQENS profile have been obstacles for studying it under physiological condition (in solution). Thanks to the recent development of neutron source, spectrometer and computational technique, they enable us to decouple internal dynamics, translational and rotational diffusions from the iQENS profile. The internal dynamics of two proteins: globular domain protein (GDP) and intrinsically disordered protein (IDP) in solution were studied. It was found that the average relaxation rate of IDP was larger than that of GDP. Through the detailed analyses on their internal dynamics, it was revealed that the fraction of mobile H atoms in IDP was much higher than that in GDP. Interestingly, the fraction of mobile H atoms was closely related to the fraction of H atoms on highly solvent exposed surfaces. The iQENS study presented that the internal dynamics were governed by the highly solvent exposed amino acid residues depending upon protein molecular architectures.

Journal Articles

A Prospect of development and use of the virtual tour of the physical protection exercise field

Nakagawa, Yosuke; Sukegawa, Hidetoshi; Naoi, Yosuke; Inoue, Naoko; Noro, Naoko; Okuda, Masahiro

Dai-41-Kai Nihon Kaku Busshitsu Kanri Gakkai Nenji Taikai Kaigi Rombunshu (Internet), 4 Pages, 2020/11

The physical protection exercise field, a facility equipped with various types of equipment such as sensors, cameras and fences that are used at nuclear facilities, is an effective tool for training on nuclear security at ISCN/JAEA, if it is carried out in-person. Due to the COVID-19 pandemic, the virtual tour of the facility is developed for the online training courses so that they could be more effective. The article explains the initial development of the virtual tour with some improvement inspired by using it on some occasions as well as a prospect of effective use of the virtual tour based on its characteristics.

Journal Articles

Piezoluminescence and liquid crystallinity of 4,4'-(9,10-Anthracenediyl)bispyridinium salts

Komoto, Shigeo*; Chuko, Tomotaka*; Hisamatsu, Shugo; Okuda, Yasuhiro*; Masu, Hyuma*; Takahashi, Masahiro*; Kishikawa, Keiki*

Crystal Growth & Design, 15(6), p.2723 - 2731, 2015/05

 Times Cited Count:9 Percentile:64.62(Chemistry, Multidisciplinary)

Piezoluminescence and liquid crystallinity of anthracene-based bispyridinium salts were investigated in stimulus responsive luminescent organic crystals and luminescent ionic liquid crystals. The salts possess an anthracene moiety as a fluorophore in their center, and the pyridiniums attached to the anthracene moiety are substituted with trialkoxybenzyl groups. Single crystals of the salts bearing two trimethoxybenzyl groups were obtained as solvates. Ethyl acetate, acetone, and dioxane solvates of the chlorides have almost the same crystal structures with one-dimensional channels. Grinding of the solvated crystals caused the extrusion of the included solvent molecules, which resulted in the red shifts of their fluorescence in the solid state. Tris(octyloxy)benzyl and tris(dodecyloxy)benzyl derivatives exhibited rectangular columnar liquid crystals upon being heated for their bromide and tetrafluoroborate salts and upon being cooled for their hexafluorophosphate salts.

Journal Articles

Stability of ideal MHD ballooning modes and its stabilization by toroidal rotation shear near separatrix

Furukawa, Masaru; Tokuda, Shinji; Wakatani, Masahiro*

Plasma Physics and Controlled Fusion, 46(2), p.409 - 421, 2004/02

 Times Cited Count:7 Percentile:24.51(Physics, Fluids & Plasmas)

In the H-mode (high-confinement mode) pedestal region of a static or a toroidally rotating D-shaped tokamak plasma, the separatrix or the X-point affects the high-n ballooning stability (n: toroidal mode number) only in a thin layer in the pedestal region. Therefore, D-shaping effectively stabilizes the ballooning modes even for a toroidally rotating plasma with a separatrix.

Journal Articles

Geometrical improvements of rotational stabilization of high-$$n$$ ballooning modes in tokamaks

Furukawa, Masaru; Tokuda, Shinji; Wakatani, Masahiro*

Nuclear Fusion, 43(6), p.425 - 429, 2003/06

We have found numerically that damping phases appear in the time evolution of the perturbation energy of high-$$n$$ ballooning modes in the presence of toroidal shear flows. The damping dominates exponential growth which occurs in the bad curvature region, resulting in stabilization of ballooning modes. D-shaping of plasma cross-section, reduction of aspect ratio, and arrangement of X-point at inner side of the torus enhance the stabilization effect of the toroidal flow through this mechanism.

Journal Articles

Geometrical improvements of rotational stabilization of high-$$n$$ ballooning modes in tokamaks

Furukawa, Masaru; Tokuda, Shinji; Wakatani, Masahiro*

Nuclear Fusion, 43(6), p.425 - 429, 2003/06

 Times Cited Count:10 Percentile:33.42(Physics, Fluids & Plasmas)

We have found numerically that damping phases appear in the time evolution of the perturbation energy of high-$$n$$ ballooning modes in the presence of toriodal flow shear, where n is a toroidal mode number. The damping dominates exponential growth which occurs in the bad curvature region, resulting in stabilization of ballooning modes. D-shaping of plasma cross-section, reduction of aspect ratio, and arrangement of an X-point at inner side of the torus enhance the stabilization effect of the toroidal flow shear through this mechanism.

Journal Articles

Gyrokinetic theory of drift waves in negative shear tokamaks

Idomura, Yasuhiro; Tokuda, Shinji; Kishimoto, Yasuaki; Wakatani, Masahiro*

Nuclear Fusion, 41(4), p.437 - 445, 2001/04

 Times Cited Count:13 Percentile:42.47(Physics, Fluids & Plasmas)

no abstracts in English

Journal Articles

Stability of E$$times$$B zonal flow in electron temperature gradient driven turbulence

Idomura, Yasuhiro; Wakatani, Masahiro*; Tokuda, Shinji

Physics of Plasmas, 7(9), p.3551 - 3566, 2000/09

 Times Cited Count:55 Percentile:84.04(Physics, Fluids & Plasmas)

no abstracts in English

Journal Articles

Gyrokinetic particle simulation using the orbit average electron drift-kinetic equation

*; Tokuda, Shinji; Wakatani, Masahiro*

Purazuma, Kaku Yugo Gakkai-Shi, 75(2), p.131 - 142, 1999/02

no abstracts in English

Journal Articles

Onset condition of ELMs in JT-60U

Kamada, Yutaka; Yoshino, Ryuji; Neyatani, Yuzuru; Sato, Masayasu; Tokuda, Shinji; Azumi, Masafumi; Takeji, Satoru; Ushigusa, Kenkichi; Fukuda, Takeshi; Mori, Masahiro; et al.

Plasma Physics and Controlled Nuclear Fusion, 38(8), p.1387 - 1391, 1996/08

 Times Cited Count:45 Percentile:80.23(Physics, Fluids & Plasmas)

no abstracts in English

Journal Articles

Prospect and attractiveness of fusion research and development toward an experimental reactor

Seki, Masahiro; ; Matsuda, Shinzaburo; *; *; *; Nishi, Masataka; *; Tokuda, Shinji; *; et al.

Denki Gakkai Gijutsu Hokoku, 0(613), 102 Pages, 1996/00

no abstracts in English

Oral presentation

Needs based curriculum development of regional training course on nuclear forensics

Noro, Naoko; Kimura, Yoshiki; Okuda, Masahiro

no journal, , 

The presentation focuses on ISCN's methodology for needs analysis and curriculum development using the existing nuclear energy cooperation framework. The method applied to develop its nuclear forensics training course.

Oral presentation

Capacity building support activities under COVID-19 pandemic and proposal for future training methods

Noro, Naoko; Kawakubo, Yoko; Sekine, Megumi; Okuda, Masahiro; Numata, Masaaki; Inoue, Naoko

no journal, , 

COVID-19 pandemic severely impacted capacity building support activities. Due to the travel restrictions, it became impossible to conduct in-person training for Asian participants, and domestic courses had to overcome various challenges as well. With the prolonged pandemic, it is essential to continue providing capacity building support in nuclear security field. The paper will share the experience of ISCN/JAEA on its capacity building support activities under COVID-19, and propose methods for capacity building support in the post COVID-19.

Oral presentation

A Consideration on strengthening nuclear security culture promotion activities; Through discussions at the Workshop on Nuclear Security Culture Self-Assessment

Okuda, Masahiro; Noro, Naoko; Inoue, Naoko

no journal, , 

Evaluation and improvement of nuclear security culture promotion activity is one of the challenges for nuclear operators. Under such situation, ISCN held a workshop on nuclear security culture self-assessment to introduce IAEA's guideline and share experts' assessment methods from Indonesia, Bulgaria, and Japan. This presentation introduces contents of the workshop and discusses ways to strengthen nuclear security culture promotion activity.

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