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Yamamoto, Masahiko; Mori, Eito; Surugaya, Naoki
JAEA-Technology 2015-024, 19 Pages, 2015/09
JAEA-Technology-2015-024.pdf:19.11MB
Environmental Sampling from the hot cell in the Operating Testing Laboratory (OTL) of the Tokai Reprocessing Plant is implemented as an inspection of International Atomic Energy Agency (IAEA) for the first time. The specified sampling place requested from IAEA inspector is a device inside the hot cell. Since it is expected to be highly radioactive, the dose rates of samples and inside the hot cell are evaluated in advance. Also, the threshold dose rates of samples are determined. Subsequently, the sampling procedure describing radiation protection has been prepared. The environmental sampling from OTL hot cell is safely performed in accordance with the procedure and the radioactivity of sample is measured. The samples are categorized as Excepted Package according to the transport regulation and are transported to Safeguards Analytical Services of IAEA.
Toya, Naruhisa*; Ogawa, Ken*; Iwatsuki, Teruki; Onuki, Kenji
JAEA-Technology 2015-023, 35 Pages, 2015/09
JAEA-Technology-2015-023.pdf:9.44MB
One of the major subjects of the ongoing geoscientific research program is the Mizunami Underground Research Laboratory (MIU) Project in the Tono area, central Japan is accumulation of knowledge about a recovery of the geological environment during and after the facility closure. Then it's necessary to plan the observation system which can use after the backfill of research tunnels. The main purpose of this report is contribution to the detailed design for relocation of the underground monitoring systems to ground surface. We discussed the restriction and requirement for the underground monitoring systems which can use after the backfill. Furthermore, we made the conceptual design for relocation of the current underground monitoring systems to ground surface.
Umeda, Koji; Yasue, Kenichi; Kokubu, Yoko; Niwa, Masakazu; Asamori, Koichi; Fujita, Natsuko; Shimizu, Mayuko; Matsubara, Akihiro; Tamura, Hajimu; Yokoyama, Tatsunori; et al.
JAEA-Review 2015-019, 42 Pages, 2015/09
JAEA-Review-2015-019.pdf:4.64MB
This report is a plan of research and development (R&D) on geosphere stability for long-term isolation of high-level radioactive waste (HLW) in JAEA, in fiscal year 2015. The objectives and contents in fiscal year 2015 are described in detail based on the outline of 7 years plan (fiscal years 2015-2021). Background of this research is clarified with the necessity and the significance for site investigation and safety assessment, and the past progress in this report. In addition, the plan framework is structured into the following categories: (1) Development and systematization of investigation techniques, (2) Development of models for long-term estimation and effective assessment, (3) Development of dating techniques.
Geoscientific Research Department, Tono Geoscience Center
JAEA-Review 2015-015, 39 Pages, 2015/09
JAEA-Review-2015-015.pdf:28.06MB
In 2014, the JAEA presented the remaining critical issues based on synthesizing R&D results up to date, performed in the approach of whole JAEA reform reflecting the maintenance problems at the fast-breeder reactor "Monju". In this revision, research program of Phase III are restructured based on the critical issues presented in the approach of the whole JAEA reform.
Center for Computational Science & e-Systems; Research info Artifacts, Center for Engineering, The University of Tokyo*
JAEA-Review 2015-011, 72 Pages, 2015/09
JAEA-Review-2015-011.pdf:9.01MB
This report provides an overview of the joint research of the Center for Computational Science & e-Systems (CCSE), JAEA and Research into Artifacts, Center for Engineering, the University of Tokyo in fiscal year 2013 (April 1, 2013 to March 31, 2014). The primary results of the research and development activities are the development of the middleware which assists large scale simulations such as the structural analysis in high precision and/or high efficiency, and the model construction to evaluate the safety of the materials. Other results of the activity are holding a joint workshop and seminars. Overview of the activity is included in this report.
Advanced Science Research Center
JAEA-Evaluation 2015-007, 263 Pages, 2015/09
JAEA-Evaluation-2015-007.pdf:8.66MB
JAEA consulted an assessment committee, "Evaluation Committee of Research Activities for Advanced Science Research" for final evaluation and prior assessment of "Advanced Science Research," in accordance with "General Guideline for the Evaluation of Government R&D Activities" by Cabinet Office, "Guideline for Evaluation of R&D in MEXT" and "Regulation on Conduct for Evaluation of R&D Activities" by the JAEA. In response to the JAEA's request, the Committee assessed the research programs and activities of the ASRC for the period of five years from April 2010 and the research programs from April 2015. The Committee evaluated the management and the research programs of the ASRC based on the explanatory documents prepared by the ASRC and the oral presentations with questions-and-answers by the Director and the research group leaders. This report summarizes the result of the assessment by the Committee with the Committee report.
Sector of Fast Reactor Research and Development
JAEA-Evaluation 2015-006, 43 Pages, 2015/09
JAEA-Evaluation-2015-006.pdf:1.15MB
JAEA-Evaluation-2015-006-appendix(CD-ROM).zip:21.35MB
Japan Atomic Energy Agency (JAEA) asked the advisory committee "Evaluation Committee of Research and Development Activities for Fast Reactor Cycle" (the Committee) to assess "The Third Basic Plan on FR/FR Cycle technologies during the period between FY2015 and FY2021", in accordance with "General Guideline for the Evaluation of Government R&D Activities" by Japanese Cabinet Office, "Guideline Evaluation of R&D in Ministry of Education, Culture, Sports, Science and Technology" and "Regulation on Conduct for Evaluation R&D Activities" by JAEA. This report summarizes the result of proposal by the Committee.
Sector of Fast Reactor Research and Development
JAEA-Evaluation 2015-005, 77 Pages, 2015/09
JAEA-Evaluation-2015-005.pdf:1.9MBJAEA-Evaluation-2015-005-appendix(CD-ROM).zip:54.13MB
Japan Atomic Energy Agency (JAEA) asked the advisory committee "Evaluation Committee of Research and Development Activities for Fast Reactor Cycle" (the Committee) to assess "R&D Programs on FBR/FR Cycle Technologies" and "R&D Programs on Prototype Fast Breeder Reactor Monju and its Related Activities" during the period between FY2010 and FY2014, in accordance with "General Guideline for the Evaluation of Government R&D Activities" by Japanese Cabinet Office, "Guideline Evaluation of R&D in Ministry of Education, Culture, Sports, Science and Technology" and "Regulation on Conduct for Evaluation R&D Activities" by JAEA. This report summarizes results of proposal by the Committee.
Sector of Fukushima Research and Development
JAEA-Evaluation 2015-004, 96 Pages, 2015/09
JAEA-Evaluation-2015-004.pdf:2.95MB
Japan Atomic Energy Agency (JAEA) consulted an assessment committee, "Evaluation Committee of Research and Development Activities for Fukushima Environment" (Committee) for ex-post and ex-ante evaluations of "Research and Development of the technologies for Fukushima Environment Recovery" in accordance with national guidelines and JAEA's regulations including "General Guideline for the Evaluation of Government Research and Development (R&D) Activities" by Cabinet Office. In response to the JAEA's request, the Committee evaluated the R&D activities during the 2nd Period of Mid-Term Research Plan (from March 2011 to March 2015) as ex-post evaluation and the R&D plans during the 3rd Period of Mid- to Long-Term Research Plan (from April 2015 to March 2022) as ex-ante evaluation. The Committee evaluated the R&D activities and programs based on the explanatory materials prepared by JAEA and its oral presentations with Q&A sessions. This report presents the results of the evaluation.
Nakayama, Masashi; Ono, Hirokazu; Nakayama, Mariko*; Kobayashi, Masato*
JAEA-Data/Code 2015-013, 53 Pages, 2015/09
JAEA-Data-Code-2015-013.pdf:9.78MBJAEA-Data-Code-2015-013(errata).pdf:0.37MBJAEA-Data-Code-2015-013-appendix(CD-ROM).zip:5.76MB
The Horonobe Underground Research Laboratory (URL) Project has being pursued by Japan Atomic Energy Agency (JAEA) to enhance the reliability of relevant disposal technologies through investigations of the deep geological environment within the host sedimentary formation at Horonobe, northern Hokkaido. The URL Project consists of two major research areas, "Geoscientific Research" and "Research and Development on Geological Disposal Technologies", and proceeds in three overlapping phases, "Phase I: Surface-based investigations", "Phase II: Investigations during tunnel excavation" and "Phase III: Investigations in the underground facilities", over a period of around 20 years. Phase III investigation was started in 2010 fiscal year. The in-situ experiment for performance confirmation of engineered barrier system (EBS experiment) had been prepared from 2013 to 2014 fiscal year at G.L.-350m gallery, and heating by electric heater in simulated overpack had started in January, 2015. One of objectives of the experiment is acquiring data concerned with Thermal-Hydrological-Mechanical-Chemical (THMC) coupled behavior. These data will be used in order to confirm the performance of engineered barrier system. This report summarizes the measurement data acquired from the EBS experiment. The period of data acquisition is from December, 2014 to March, 2015. It will be periodically published summarized data of EBS experiment.
Sugawara, Takanori; Yamaguchi, Kazushi
JAEA-Technology 2015-022, 21 Pages, 2015/08
JAEA-Technology-2015-022.pdf:9.18MB
The oxygen sensors to measure the oxygen concentration in liquid LBE (lead-bismuth eutectic) were fabricated for future use in LBE-cooled ADS (accelerator-driven system) or LBE test loops. Two types of oxygen sensors were fabricated and used for the measurement under the oxygen saturated condition. Through the measurement experiment, it was confirmed that the electromotive force (EMF) from Pt-type sensor was reliable under 350
C to 450C LBE temperature. The Pt-type sensor will be the first candidate for the use in LBE test loops.
Imamura, Hiroaki; Hayakawa, Masato; Handa, Takuya*; Namiki, Katsuo*
JAEA-Technology 2015-020, 85 Pages, 2015/08
JAEA-Technology-2015-020.pdf:24.15MB
Sodium using for past experiments was maintained at the sodium technology development facility in Oarai Research and Development Center. But the oldest dump tank of the sodium was fabricated over forty years ago. It is necessary to keep it safer and more stable condition. Therefore transportation of the sodium from the facility to a new facility was planned not only to keep it safer and more stable condition but also to reuse it for other sodium experiments. Such a large amount of sodium has never been transported between two facilities in Japan. Pipe transportation between two facilities was selected by considering safety, operating efficiency and cost. The transportation equipment with over 200 meters long pipes was constructed and sodium transportation was operated. Total amount of the transported sodium was about 270 m
and the flow rate was 12m/h on average.
R&D Cooperation Section
JAEA-Review 2015-014, 40 Pages, 2015/08
JAEA-Review-2015-014.pdf:3.13MB
This report summarizes the overview on the results of the cooperation research for preceding basic engineering study of issues concerning the fast breeder reactor, radiation safety, geological disposal and geoscience that were carried out in 2014 fiscal year.
Onoe, Hironori; Kosaka, Hiroshi*; Takeuchi, Ryuji; Saegusa, Hiromitsu
JAEA-Research 2015-008, 146 Pages, 2015/08
JAEA-Research-2015-008.pdf:76.46MB
Mizunami Underground Research Laboratory (MIU) Project is being carried out by Japan Atomic Energy Agency (JAEA) in the Cretaceous Toki granite in the Tono area, central Japan. The MIU Project has three overlapping phases: Surface-based Investigation (Phase I), Construction (Phase II) and Operation (Phase III). In this study, calibration of hydrogeological model and groundwater flow simulation using the data obtained by the Phase I and Phase II were carried out in order to develop the methodology for construction and update of hydrogeological model on Site Scale. As a result, hydrogeological model on Site Scale, which is able to simulate comprehensively the obtained data regarding groundwater pressure distribution before excavation of the MIU facilities, hydraulic responses and inflow volume during excavation of the MIU facilities, was constructed.
Hama, Katsuhiro; Mizuno, Takashi; Sasao, Eiji; Iwatsuki, Teruki; Saegusa, Hiromitsu; Sato, Toshinori; Fujita, Tomoo; Sasamoto, Hiroshi; Matsuoka, Toshiyuki; Yokota, Hideharu; et al.
JAEA-Research 2015-007, 269 Pages, 2015/08
JAEA-Research-2015-007.pdf:68.65MBJAEA-Research-2015-007(errata).pdf:0.07MB
We have synthesised the research results from Mizunami/Horonobe URLs and geo-stability projects in the second mid-term research phase. It could be used as technical bases for NUMO/Regulator in each decision point from sitting to beginning of disposal (Principal Investigation to Detailed Investigation Phase). High quality construction techniques and field investigation methods have been developed and implemented and these will be directly applicable to the National Disposal Program (along with general assessments of hazardous natural events and processes). It will be crucial to acquire technical knowledge on decisions of partial backfilling and final closure by actual field experiments in Mizunami/Horonobe URLs as main themes for the next phases.