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Collaborative Laboratories for Advanced Decommissioning Science; Kyushu University*
JAEA-Review 2019-039, 104 Pages, 2020/03
JAEA-Review-2019-039.pdf:5.57MB
The Collaborative Laboratories for Advanced Decommissioning Science (CLADS), Japan Atomic Energy Agency (JAEA), had been conducting the Center of World Intelligence Project for Nuclear Science/Technology and Human Resource Development (hereafter referred to "the Project") in FY2018. The Project aims to contribute to solving problems in nuclear energy field represented by the decommissioning of the Fukushima Daiichi Nuclear Power Station, Tokyo Electric Power Company Holdings, Inc. For this purpose, intelligence was collected from all over the world, and basic research and human resource development were promoted by closely integrating/collaborating knowledge and experiences in various fields beyond the barrier of conventional organizations and research fields. The sponsor of the Project was moved from the Ministry of Education, Culture, Sports, Science and Technology to JAEA since the newly adopted proposals in FY2018. On this occasion, JAEA constructed a new research system where JAEA-academia collaboration is reinforced and medium-to-long term research/development and human resource development contributing to the decommissioning are stably and consecutively implemented. Among the adopted proposals in FY2018, this report summarizes the research results of the "Research and Development of Transparent Materials for Radiation Shield using Nanoparticles". The present study aims to reduce radiation exposure of workers in debris retrieval/analysis and reduce deterioration of optical and electronic systems in remote cameras. For these purposes, we develop transparent radiation shield by making the shield materials into nanoparticles, and dispersing/solidifying them in epoxy resin. By making B
C and W into nanoparticles, we will also develop a radiation shield that shields both neutrons and gamma-rays, and also suppresses secondary gamma-rays produced from neutrons.
Maekawa, Fujio
Hamon, 28(4), p.208 - 211, 2018/11
Adequate shielding of neutrons and associated 
-rays is of importance from viewpoints of the radiation safety of researchers and good experimental data taking by reducing the background. This article introduces basics of neutron shielding, physics and suitable materials for neutron and -ray shielding, and an example of conceptual shielding design for the 1-MW spallation neutron source of J-PARC MLF.
JAERI-Data/Code 96-020, 45 Pages, 1996/06
JAERI-Data-Code-96-020.pdf:1.1MB
no abstracts in English
Konno, Chikara; Maekawa, Fujio; Oyama, Yukio; Ikeda, Yujiro; Kosako, Kazuaki*; Maekawa, Hiroshi
JAERI-Research 94-043, 96 Pages, 1994/12
JAERI-Research-94-043.pdf:3.5MB
no abstracts in English
Shindo, Ryuichi; Murata, Isao; Sawa, Kazuhiro; Shiozawa, Shusaku; ; Mori, Tomoaki*
Proc. of the 8th Int. Conf. on Radiation Shielding, p.351 - 358, 1994/00
no abstracts in English
Suzuki, Tomoo*; ; Tanaka, Shunichi;
JAERI-M 93-143, 82 Pages, 1993/07
no abstracts in English
Yamano, Naoki*; Minami, Kazuyoshi*; ; Naito, Yoshitaka
JAERI 1316, 307 Pages, 1989/03
no abstracts in English
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JAERI-M 85-050, 117 Pages, 1985/04
no abstracts in English
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JAERI-M 84-102, 54 Pages, 1984/06
no abstracts in English
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JAERI-M 84-019, 66 Pages, 1984/02
no abstracts in English
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JAERI-M 82-202, 50 Pages, 1982/12
no abstracts in English
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JAERI-M 82-201, 60 Pages, 1982/12
no abstracts in English
; ; Shimooke, Takanori
JAERI-M 9562, 44 Pages, 1981/07
no abstracts in English
; ; ; Shin, Kazuo*; ; Nakazawa, Masaharu*; ; ; ; ; et al.
JAERI-M 8686, 170 Pages, 1980/02
no abstracts in English
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JAERI-M 8229, 62 Pages, 1979/05
no abstracts in English
; ; ; ; Nakazawa, Masaharu*; ; ; ; ; ; et al.
JAERI-M 7843, 219 Pages, 1978/09
no abstracts in English
