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Shimada, Taro; Nemoto, Hiromi*; Takeda, Seiji
Hoken Butsuri (Internet), 57(1), p.5 - 29, 2022/03
Of the asbestos-containing wastes arising from the dismantling activities of nuclear facilities, those with radioactive concentrations that do not need to be treated as radioactive substances will be cleared from the nuclear regulatory control. Those will be disposed of or recycled as specially controlled industrial waste based on the Waste Management and Public Cleansing Act. The authors constructed evaluation scenarios according to the treatment manual for asbestos-containing waste and evaluated public exposure doses per year for 33 radionuclides. Based on the evaluated doses, the radioactive concentration corresponding to the dose criteria of 10 
Sv/y for clearance was calculated for each radionuclide and scenario. As a result, the evaluated concentration was equal to or higher than the current clearance level. It was confirmed that the application of the current clearance level for asbestos-containing wastes did not affect safety.
Endo, Akira
Hokeikyo Nyusu, (68), P. 1, 2021/10
This article introduces resumption of utilization of the research reactor JRR-3 at the Nuclear Science Research Institute, JAEA. JRR-3 resumed its operation in July 2021 for the first time in 10 years and 7 months, after the confirmation of its conformity to the new regulatory requirements established by the Nuclear Regulatory Commission following the accident at the TEPCO's Fukushima Daiichi Nuclear Power Plant in March 2011. JRR-3 is expected to produce many research results in academic and industrial applications as a research center for neutron science in collaboration with the Materials and Life Science Facility (MFL) of the Japan Proton Accelerator Research Complex (J-PARC).
Matsue, Hideaki
Hoshasen (Internet), 45(2), p.77 - 88, 2019/07
JRR-3 operated by Japan Atomic Energy Agency (JAEA) is 20 MW grade research reactor for widely used for various academic research and industrial applications in many fields from utilization of internal irradiation to utilization of neutron beam. Although JRR-3 has not been operated due to respond to the new regulation standard established after the Great East Japan Earthquake of March 11, 2011, JRR-3 will resume operation in October 2020. This article reports neutron utilization such as various kinds of reactor irradiation, prompt gamma-ray analysis, neutron radiography and neutron residual stress analysis, and the efforts of the JRR-3 user 's office aiming for a one - stop office.
Tamai, Hiroshi
Hiroshima Repoto 2017-Nen Ban; Kakugunshuku, Kakufukakusan, Kakusekyuritei O Meguru 2016-Nen No Doko, p.163 - 165, 2017/03
The series of Nuclear Security Summit, initiated by President Barack Obama, was held biennially, four times since 2010, and played an important role in promoting international efforts to enhance nuclear security. Despite Russia's refusal to participate in the fourth meeting, these summit-level meetings have gained both international and domestic attention, which have led to remarkable improvements in the field of nuclear security of each participating country. Therefore, there is an urgent need to take continuous measures to keep this momentum alive even after the final Nuclear Security Summit concluded in 2016. The challenges in strengthening nuclear security, prospects in the post-Nuclear Security Summit phase, as well as efforts and measures that Japan should pursue are investigated.
Nishimura, Akihiko; Takenaka, Yusuke*
Sumato Purosesu Gakkai-Shi, 6(2), p.74 - 79, 2017/03
no abstracts in English
Matsubayashi, Masahito; Kawabata, Yuji*
Hoshasen To Sangyo, (107), p.4 - 15, 2005/09
no abstracts in English
Matsue, Hideaki; Tanji, Akira; Miyata, Satoru; Yasuda, Ryo; Matsubayashi, Masahito; Nakanishi, Tomoko
Dai-5-Kai Hoshasen Ni Yoru Hihakai Hyoka Shimpojiumu Koen Rombunshu, p.45 - 48, 2005/02
no abstracts in English
Matsubayashi, Masahito; Yasuda, Ryo; Tanji, Akira; Miyata, Satoru; Matsue, Hideaki; Nakanishi, Tomoko
Dai-5-Kai Hoshasen Ni Yoru Hihakai Hyoka Shimpojiumu Koen Rombunshu, p.35 - 36, 2005/02
no abstracts in English
Takeda, Masayasu
Hamon, 14(1), p.48 - 49, 2004/02
no abstracts in English
Minehara, Eisuke
Proceedings of ARTA 2004, p.75 - 76, 2004/00
The JAERI superconducting RF linac-based free-electron laser has successfully produced the tunable, 6% or more efficient, a few hundreds femtoseconds, and 2.34kW high average power laser light firstly. Here we discuss and report what kinds of the accelerator and free-electron laser technologies we need in order to make a large-scale and popular industrial FEL applications possible, to increase the average power drastically, to realize the JAERI FEL to be a non-ionizing radiation generating device, and to miniaturize the device volume and weight. In the discussion as a specific example of the large-scale and popular industrial applications, we discuss the nuclear energy related example, and the required technologies of the accelerator and non-accelerator related.
Watanabe, Hiroshi
Genshiryoku eye, 48(9), p.70 - 71, 2002/09
no abstracts in English
Oda, Yoshihiro; Funasaka, Hideyuki; Wang, X.*; Obara, Kenji*; Wada, Hitoshi*
JNC TY8400 2000-002, 47 Pages, 2000/03
JNC-TY8400-2000-002.pdf:2.53MB
no abstracts in English
; ; Toyama, Shinichi; Hasegawa, Makoto
JNC TN9410 2000-005, 182 Pages, 2000/03
JNC-TN9410-2000-005.pdf:5.73MB
According to the Long-term Program for Partitioning and Transmutation which was published by the Atomic Energy Commission in 1988, study on the transmutation using an electron accelerator, which was a part of the program, has been carried out in the O-arai Engineering Center. It is the study on converting radioactive fission products for example Strontium and Cesium to stable nuclides by photonuclear reaction caused by high energy gamma-ray made by an electron accelerator. It was thought that a 100mA-100Mev (10MW output power) accelerator would be needed in order to carry out the transmutation study in engineering phase. Therefore, development of the High-Current Electron Accelerator whose target had been 20mA-10Mev (200kW output power) accelerator was carried out as development of elemental technologies on beam stabilization. Construction of the accelerator was completed in March, 1997, afler development of the elemental devices. After the facility assessment, the full-scale experiment of the accelerator was started in January, 1999. However, the reform of the Power Reactor and Nuclear Fuel Development Corporation caused by the fire and explosion accident in the Asphalt Bitumenizing Facility was hardly discussed between the completion and the starting the experiment. It was decided that development of the accelerator would be terminated until the fiscal year 1999, results of the development would be summarized, and the developed accelerator would be planed to utilize as a beam utilization facility, in the Medium-Long-term Project Program of the Japan Nuclear Fuel Cycle Development Institute which was in March, 1999. It showed the direction that research and development for transmutation would be terminated. According to the Medium-Long-Term Project Program, the utilization of the accelerator was discussed, and research themes of the utilization of the accelerator in the various fields as well as nuclear field were investigated.
Mochiji, Toshiro;
JNC TN1450 2000-001, 122 Pages, 2000/03
JNC-TN1450-2000-001.pdf:6.39MB
no abstracts in English
Mochiji, Toshiro;
JNC TN1200 2000-001, 13 Pages, 2000/03
JNC-TN1200-2000-001.pdf:2.94MB
no abstracts in English
*
JNC TJ9400 99-001, 78 Pages, 1999/03
For studies on incineration of long-lived fission products (LLFPs) in a fast reactor, detailed characteristics of reactor core such as incineration performance have to be investigated. Therefore, accurate neutron cross section data of LLFPs become necessary. In the present study, in order to perform the precise measurements of keV-neutron capture cross sections of Tc-99, which is one of most important LLFPs, the details of the Tc-99 sample and the measurements with our experimental facilities were investigated.
*; *; *; *
JNC TJ1420 2000-003, 1020 Pages, 1999/03
JNC-TJ1420-2000-003.pdf:110.99MB
no abstracts in English
Takahashi, Takeshi; ; ; Kashiwazaki, Hiroshi; Fujita, Tomoo; Nomura, Kazunori; Yamana, Satoshi
JNC TN8420 99-005, 48 Pages, 1999/01
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