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Journal Articles

Reconstruction of residents' thyroid equivalent doses from internal radionuclides after the Fukushima Daiichi Nuclear Power Station accident

Oba, Takashi*; Ishikawa, Tetsuo*; Nagai, Haruyasu; Tokonami, Shinji*; Hasegawa, Arifumi*; Suzuki, Gen*

Scientific Reports (Internet), 10(1), p.3639_1 - 3639_11, 2020/02

 Times Cited Count:7 Percentile:76.34(Multidisciplinary Sciences)

Internal doses of residents after the Fukushima Daiichi Nuclear Power Station accident have been reconstructed. In total 896 behaviour records in the Fukushima Health Management Survey were analysed to estimate thyroid doses via inhalation, using a spatiotemporal radionuclides concentration database constructed by atmospheric dispersion simulations. After a decontamination factor for sheltering and a modifying factor for the dose coefficient were applied, estimated thyroid doses were close to those estimated on the basis of direct thyroid measurement. The median and 95th percentile of thyroid doses of 1-year-old children ranged from 1.2 to 15 mSv and from 7.5 to 30 mSv, respectively.

JAEA Reports

Development of waste management system

Mitsuda, Motoyuki; Sasaki, Toshiki

JAEA-Technology 2015-013, 29 Pages, 2015/06

JAEA-Technology-2015-013.pdf:0.96MB

For implementation of disposal of the radioactive waste generated from Japan Atomic Energy Agency, Waste Management System which manages all of the waste data has been developed. We surveyed the kinds of data needed for the waste management at each site, and we set the standard waste management data items. We developed conceptual design for the waste management system and established the system for major sites, Nuclear Science Research Institute, Ningyo-toge Environmental Engineering Center, Fugen Decommissioning Engineering Center, Oarai Research and Development Center, Nuclear Fuel Cycle Engineering Laboratories. For other small sites, we accumulate waste data to the common waste storage database. Therefore, we have developed the system which manages the quality assurance waste data depending on waste treatment situation in JAEA.

Journal Articles

Effective 3D data visualization in deep shaft construction

Inagaki, Daisuke*; Tsusaka, Kimikazu*; Aoyagi, Kazuhei; Nago, Makito*; Ijiri, Yuji*; Shigehiro, Michiko*

Proceedings of ITA-AITES World Tunnel Congress 2015 (WTC 2015)/41st General Assembly, 10 Pages, 2015/05

JAEA Reports

Study of decommissioning cost evaluation technique for nuclear reactor dismantlement; Calculation of decommissioning cost by COSMARD

Oshima, Soichiro; Shiraishi, Kunio; Shimada, Taro; Sukegawa, Takenori; Yanagihara, Satoshi

JAERI-Tech 2005-046, 46 Pages, 2005/09

JAERI-Tech-2005-046.pdf:3.43MB

A model for estimating decommissioning costs consisting of labor cost, device cost and expense, was developed for items which OECD/NEA had standardized, and was installed into the computer system for planning and management of reactor decommissioning (COSMARD). Input data files and databases for the decommissioning of JPDR were prepared, and the decommissioning cost was calculated with COSMARD. In addition, the decommissioning cost for a large scale BWR power plant was also calculated on the assumption of the advantage of scale. The calculations have shown that it is useful and efficient for studying the decommissioning costs for nuclear reactors to apply the COSMARD with database for cost estimation to the decommissioning cost calculation.

Journal Articles

Problem Solving Environment for supporting large-sclae simulation

Ueshima, Yutaka

PSE Book, p.69 - 82, 2005/03

no abstracts in English

JAEA Reports

Proceedings of Conferences on the Large Data Management; January 29-31, 2003, Advanced Photon Research Center, Kyoto

Advanced Photon Research Center; Center for Promotion of Computational Science and Engineering

JAERI-Conf 2004-002, 81 Pages, 2004/03

JAERI-Conf-2004-002.pdf:7.77MB

no abstracts in English

Journal Articles

Development of Decommissioning Engineering Support System(DEXUS) of the Fugen Nuclear Power Station

Iguchi, Yukihiro*; Kanehira, Yoshiki*; Tachibana, Mitsuo*; Johnsen, T.*

Journal of Nuclear Science and Technology, 41(3), p.367 - 375, 2004/03

The Fugen Nuclear Power Station (NPS) was shut down permanently in March 2003, and preparatory activities are underway to decommission the Fugen NPS. An engineering system to support the decommissioning is being developed to create a dismantling plan using state-of-the-art software such as 3-dimentional computer aided design (3D-CAD) and virtual reality (VR). In particular, an exposure dose evaluation system using VR has been developed and tested. The total system can be used to quantify radioactive waste, to visualize radioactive inventory, to simulate the dismantling plan, to evaluate workload in radiation environments and to optimize the decommissioning plan. The system will also be useful for educating and training workers and for gaining public acceptance.

JAEA Reports

Development of computer systems for planning and management of reactor decommissioning; A Study on influence of work difficulty factors on project management data and simplification of work breakdown structures (Contract research)

Oshima, Soichiro; Sukegawa, Takenori; Shiraishi, Kunio; Yanagihara, Satoshi

JAERI-Tech 2001-086, 83 Pages, 2001/12

JAERI-Tech-2001-086.pdf:5.23MB

Project management data on dismantling the Japan Power Demonstration Reactor (JPDR) was calculated using the Code System for Planning and Management of Reactor Decommissioning (COSMARD), and then its validity was studied by comparing the calculation results with actual data. In addition, work breakdown structure models and database were modified to meet an evaluation with changing work difficulty of preparation and cleanup activities, and calculations were further conducted to analyze feasibility by changing various conditions on cutting and conditioning activities. As the results, COSMARD was verified to be useful by confirming calculation capability on reflection of actual work conditions and relatively good agreement between actual data and calculations. Moreover, it was cleared that main parameters such as work difficulty of preparation and cleanup activities and the cutting speed in demolition work could affect to manpower within 30% in each calculations.

JAEA Reports

Data analysis on worker dose in dismantling of Japan Power Demonstration Reactor (JPDR) (Contract research)

Shiraishi, Kunio; Sukegawa, Takenori; Yanagihara, Satoshi

JAERI-Data/Code 2001-028, 86 Pages, 2001/11

JAERI-Data-Code-2001-028.pdf:6.31MB

The data on worker dose in dismantling of the Japan Power Demonstration Reactor (JPDR) was analyzed to characterize its features. It was appeared from the study that the collective dose to the workers was 306 man-mSv, in which maximum individual dose was 8.5 mSv, almost all doses were received in the activities for dismantling of reactor internals, the reactor pressure vessel and the biological shield, and that the worker dose distribution was similar to that in the maintenanee of the facilities which was characterized by the hybrid log normal distribution model. Farthermore, it was found that the dismantling activities were categorized into three groups depending on dose rates in workplaces, then contribution factors for radiation exposure in terms of dose rates in different groups were derived based on the analysis. The study would be useful for estimation of worker dose in future decommissioning of commercial nuclear power plants in Japan.

JAEA Reports

Data analysis on waste arising in dismantling of Japan Power Demonstration Reactor (JPDR) (Contract research)

Shiraishi, Kunio; Sukegawa, Takenori; Yanagihara, Satoshi

JAERI-Data/Code 99-050, p.113 - 0, 2000/01

JAERI-Data-Code-99-050.pdf:5.95MB

no abstracts in English

Journal Articles

Design of JRR-4 operation supporting system

Takahashi, Hiroki; ; Yamamoto, Kazuyoshi; Yoritsune, Tsutomu

JAERI-Conf 99-006, p.125 - 130, 1999/08

no abstracts in English

JAEA Reports

Data analysis on work activities in dismantling of Japan Powor Demonstration Reactor, JPDR (Contract research)

; Sukegawa, Takenori; Yanagihara, Satoshi

JAERI-Data/Code 98-010, 186 Pages, 1998/03

JAERI-Data-Code-98-010.pdf:7.12MB

no abstracts in English

Journal Articles

Demonstration of D&D technologies by Japn Power Demonstration Reactor decommissioning program

Yanagihara, Satoshi; ; Tachibana, Mitsuo

Decommissioning,Decontamination and Reutilization Worldwide Experience-DD&R What Does it Mean, 0, p.132 - 138, 1996/00

no abstracts in English

Journal Articles

The Japan Power Demonstration Reactor decommissioning program; Experience and data analysis on dismantling procedures

Yanagihara, Satoshi; Tachibana, Mitsuo; ;

Proc., The 1994 Int. Symp. on Decontamination & Decommissioning, 0, 6 Pages, 1994/00

no abstracts in English

Journal Articles

Analysis of accident management in steam generator tube rupture event

Ishigami, Tsutomu; Kobayashi, Kensuke

Nihon Genshiryoku Gakkai-Shi, 35(6), p.549 - 560, 1993/06

 Times Cited Count:0 Percentile:0.01(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Estimating the costs for Japans JPDR project

Yanagihara, Satoshi; Tanaka, Mitsugu

Energy J., Vol. 12 (Special Issue), p.135 - 148, 1991/00

no abstracts in English

Journal Articles

Application and development of computer code systems for the management of nuclear power plant decommissioning; Canadian and Japanese approach

G.Pratapagiri*; Yanagihara, Satoshi; Fujiki, Kazuo; J.Liederman*; Tanaka, Mitsugu

Low and Intermediate Level Radioactive Waste Management,Vol. 1, p.615 - 623, 1991/00

no abstracts in English

JAEA Reports

ROSA-IV/LSTF Experimental Data Reduction and Management Software System(Version1)

; ; ; *; R.R.Rohrdanz*

JAERI-M 85-121, 101 Pages, 1985/09

JAERI-M-85-121.pdf:2.75MB

no abstracts in English

Oral presentation

Case study of research data policy development in JAEA

Kumazaki, Yui

no journal, , 

The Japan Atomic Energy Agency (JAEA) is preparing a research data policy that defines a policy for the management and open of research data. We conducted some surveys of the current handling and open of research data and interviewed with researchers. In the discussions so far, the following are discussed: (1) prudent judgment is necessary for open due to the characteristics of JAEA's R&D; (2) difficulty in establishing a unified policy due to the diversity of R&D fields; and (3) necessity to ensure the quality and reliability of our research data. This time, I would like to introduce the status of these surveys and studies, and consider the management of research data in organizations.

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