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Yoshinaka, Kazuyuki; Shimizu, Kazuyuki; Sugiyama, Takayuki
JAEA-Review 2021-008, 112 Pages, 2021/07
We had drastically been improving quality assurance system for Tokai Reprocessing Plant (TRP), through applying new regulatory requirements, giving up ISO certification from FY2012 to 2019. In revising QA system, it is obviously necessary to satisfy the regulatory requirements, but it is important to continuously improve the QA system considering effectiveness to safety performance based on earlier experiences. In this report, the background of QA system revision, interpretation and thinking way of conformation and application to new regulation and "Application Guide to Quality Assurance Code for Safety in Nuclear Power Plants (JEAC 4111)" to TRP, issues considered. And matters that require attention for future QA activities are described. Key points are "in work processes planning, relationship with other sections and responsibility boundaries should be clearly defined with such as flow chart", "to manage decision-making processes is important, including input information, judgment criteria and so on", "concerning process monitoring and measurement, not only focusing on scheduling but also viewpoints toward conditions of facilities/systems, conformance to regulatory requirements and process improvement are necessary", and "in documentation, matching for existing system, clear relation to other fundamental documents are necessary".
Kotaki, Hideyuki; Daito, Izuru; Kando, Masaki; Hayashi, Yukio; Kawase, Keigo; Kameshima, Takashi*; Fukuda, Yuji; Homma, Takayuki; Ma, J.*; Chen, L. M.*; et al.
Physical Review Letters, 103(19), p.194803_1 - 194803_4, 2009/11
Times Cited Count:58 Percentile:88.26(Physics, Multidisciplinary)Suzuki, Junichi; Shinohara, Takenao; Takata, Shinichi; Oku, Takayuki; Suzuya, Kentaro; Aizawa, Kazuya; Arai, Masatoshi; Otomo, Toshiya*; Sugiyama, Masaaki*
Nihon Kessho Gakkai-Shi, 50(1), p.24 - 28, 2008/02
no abstracts in English
Tsutagi, Koichi; Shimizu, Ryo; Sugiyama, Takayuki; Nakazawa, Y.; Tanaka, Hitoshi; Watahiki, Masaru; Muto, Hideyo
Saikuru Kiko Giho, (21), p.33 - 40, 2003/00
This report describes the outline of the measurement system of HALW storage tank and a measurement situation, and a thickness measurement result.
Goibuchi, Takayuki*; Wada, Yukio; Tomiyasu, Hiroshi*; Sugiyama, Wataru*
PNC TY8607 95-002, 197 Pages, 1995/05
None
Shinohara, Takenao; Takata, Shinichi; Suzuki, Junichi; Oku, Takayuki; Suzuya, Kentaro; Aizawa, Kazuya; Otomo, Toshiya*; Sugiyama, Masaaki*; Arai, Masatoshi
no journal, ,
no abstracts in English
Takata, Shinichi; Suzuki, Junichi; Shinohara, Takenao; Oku, Takayuki; Suzuya, Kentaro; Aizawa, Kazuya; Otomo, Toshiya*; Sugiyama, Masaaki*; Arai, Masatoshi
no journal, ,
For the clarification and enhancement of function of biological molecules with nm size, we believe that small-angle neutron scattering measurement in wide- range giving structural information of the molecules with atomic resolution is important. We have thus designed the high-intensity small-angle neutron scattering instrument HI-SANS for the J-PARC in order to carry out the efficient measurement in wide- range including high-q range of 1100 nm. In order to use effectively the information on the structure over wide- rang, we have performed the simulation of neutron scattering function from typical proteins in solution using Debye formula. The result showed that change of the scattering function from = 0.1 to 5 is important for the new structural analysis which added the information on an internal structure.
Suzuki, Junichi; Shinohara, Takenao; Takata, Shinichi; Oku, Takayuki; Suzuya, Kentaro; Aizawa, Kazuya; Arai, Masatoshi; Otomo, Toshiya*; Sugiyama, Masaaki*
no journal, ,
no abstracts in English
Kameshima, Takashi; Kotaki, Hideyuki; Kando, Masaki; Daito, Izuru; Kawase, Keigo; Fukuda, Yuji; Chen, L. M.; Faenov, A. Y.; Pikuz, T. A.*; Homma, Takayuki; et al.
no journal, ,
In recent years, It is noted to use of discharge capillary for laser plasma electron acceleration in order to solve the limit owing to laser focal distance. As the higher plasma density is, the lower the refraction index is, laser propagetes into and interacts plasma, keeping its focal size because discharge plasma behaves like optical fiber. This tequnique would make acceleration space much longer, compared to conventional method with several mm length. This time, we measured plasma density profile inside capillary in order to research optimum distribution of the refraction index, which is very important for R&D of capillary. Here, we will talk about the experimental result.
Takata, Shinichi; Shinohara, Takenao; Suzuki, Junichi; Oku, Takayuki; Suzuya, Kentaro; Aizawa, Kazuya; Otomo, Toshiya*; Sugiyama, Masaaki*; Arai, Masatoshi
no journal, ,
The high-intensity smaller-angle neutron scattering instrument (HI-SANS) is designed for efficient measurements in wide-q range including higher q range of 110 to 50 []. By obtaining structural information from such wide-q range, the instrument is expected to contribute significantly to clarify hierarchical structures such as protein, polymer, and metal nanoparticles. Heretofore, the analysis method used in conventional SANS instruments was enough to treat the data measured in the q range limited below about 0.2 []. However, for the HI-SANS, it is important to develop a new analysis method, which is taken into account the information of the material structure in atomic scale to micrometer scale. We will present the development of such wide-q analysis method along with the contrast variation analysis of proteins in hydrated water and the reverse Monte Carlo analysis.
Kameshima, Takashi; Kotaki, Hideyuki; Kando, Masaki; Daito, Izuru; Kawase, Keigo; Fukuda, Yuji; Chen, L. M.; Homma, Takayuki; Kondo, Shuji; Bulanov, S. V.; et al.
no journal, ,
Recently, it is noticed to generate plasma by using capillary discharge in order to solve a limit due to focal distance of laser, which is one of problems in laser plasma electron acceleration. Since the higher its plasma density, the lower plasma refraction index is, a laser propagates in plasma with its focal size kept and interacts plasma in same principle of optical fiber by distributing plasma as its outside is more dense than its inside. In 2006, KEK, JAEA, and Chinese Academy Engineering Physics(CAEP) carried out a collaboration experiment, where we succeed in generating 560MeV electron beam by using discharge capillary. The result will be informed.
Kameshima, Takashi; Kotaki, Hideyuki; Kando, Masaki; Daito, Izuru; Kawase, Keigo; Fukuda, Yuji; Chen, L. M.; Homma, Takayuki; Kondo, Shuji; Bulanov, S. V.; et al.
no journal, ,
Recently, it is noticed to use discharge capillary for removing an acceleration length limit due to laser focus, which is one of problems to solve in laser plasma electron acceleration. Inside discharge plasma, laser propagates with its initial spot size kept and interacts plasma because the plasma distribution has the same refraction structure as optical fiber. In 2006, KEK, JAEA and Chinese Academy Engineering Physics (CAEP) carried out collaboration experiment. We succeeded the production of 560MeV electron beam by using discharge capillary. The experimental result will be reported.
Suzuki, Junichi; Shinohara, Takenao; Takata, Shinichi; Oku, Takayuki; Kira, Hiroshi; Suzuya, Kentaro; Aizawa, Kazuya; Arai, Masatoshi; Otomo, Toshiya*; Sugiyama, Masaaki*
no journal, ,
Small-angle neutron scattering (SANS) technique has been indispensable in research of microstructures and hierarchical structures in materials science and life science. However, recent progress in nanotechnology and research of complex multi-component or multi-phase systems and non-equilibrium systems has required the SANS technique to enable to produce structural information more efficiently with higher structural and time resolution. The time-of-flight SANS instrument HI-SANS constructed at the 1MW neutron source of J-PARC has potential to satisfy such requirements by simultaneous coverage of wide q-range with high q-resolution by using large area detectors located at positions with short total flight path of neutrons and with polarizing and magnetic focusing devices.
Kotaki, Hideyuki; Daito, Izuru; Kando, Masaki; Hayashi, Yukio; Kawase, Keigo; Kameshima, Takashi; Fukuda, Yuji; Homma, Takayuki; Ma, J.*; Chen, L. M.*; et al.
no journal, ,
no abstracts in English
Kameshima, Takashi; Kotaki, Hideyuki; Kando, Masaki; Daito, Izuru; Kawase, Keigo; Fukuda, Yuji; Chen, L. M.*; Homma, Takayuki; Kondo, Shuji; Esirkepov, T. Z.; et al.
no journal, ,
The acceleration method of laser plasma electron acceleration has very strong electric field, however, the acceleration length is veryshort. Hence, the energy gain of electron beams were confined to be approximately 100 MeV. Recently, this problem was solved by using discharge capillary. The feature of plasma was used that high dense plasma has low refractive index. Distributing plasma inside capillary as low dense plasma is in the center of capillary and high dense plasma is in the external side of capillary can make a laser pulse propaget inside capillary with initial focal spot size. Experiments with capillary were performed in China Academy of Engineering Physics (CAEP) and Japan Atomic Energy Agency (JAEA). We obtained the results of 4.4 J laser pulse optical guiding in 4 cm capillary and 0.56 GeV electron production in CAEP in 2006, and 1 J laser pulse optical guiding in 4 cm capillary and electron beams productions.
Kotaki, Hideyuki; Daito, Izuru; Kando, Masaki; Hayashi, Yukio; Kawase, Keigo; Kameshima, Takashi; Fukuda, Yuji; Homma, Takayuki; Ma, J.*; Chen, L. M.*; et al.
no journal, ,
Shinohara, Takenao; Takata, Shinichi; Suzuki, Junichi; Oku, Takayuki; Kira, Hiroshi; Suzuya, Kentaro; Aizawa, Kazuya; Arai, Masatoshi; Otomo, Toshiya*; Sugiyama, Masaaki*
no journal, ,
no abstracts in English
Takata, Shinichi; Shinohara, Takenao; Suzuki, Junichi; Oku, Takayuki; Kira, Hiroshi; Suzuya, Kentaro; Aizawa, Kazuya; Arai, Masatoshi; Otomo, Toshiya*; Sugiyama, Masaaki*
no journal, ,
no abstracts in English
Tajikara, Masayoshi; Yasue, Kenichi; Sugiyama, Shinji*; Takada, Keita*; Kato, Takayuki*; Sugai, Toshihiko; Morita, Yoshimune*; Furusawa, Akira*
no journal, ,
no abstracts in English
Suzuki, Junichi; Takata, Shinichi; Shinohara, Takenao; Oku, Takayuki; Kira, Hiroshi; Suzuya, Kentaro; Aizawa, Kazuya; Arai, Masatoshi; Otomo, Toshiya*; Sugiyama, Masaaki*
no journal, ,
no abstracts in English