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Tsujimura, Norio
Hokeikyo Nyusu, (71), p.2 - 5, 2023/04
The TLD badge, a personal dosimeter using a thermoluminescence dosemeter, currently in operation at the Nuclear Fuel Cycle Engineering Laboratories of the Japan Atomic Energy Agency (JAEA-NCL), was developed in collaboration with Matsushita Industrial Co., Ltd. (now Panasonic System Solutions Japan Co., Ltd.), and was put into operation in 1982. Since then, the TLD badge has been used not only at NCL but also in Japan and overseas for a long time. However, the TLD badge system will no longer be accepted for new production by the manufacturer in 2019, and maintenance and repair services for the TLD readers will cease in 2027. In addition, a performance accreditation system for personal dosimetry will be introduced in Japan, and accredited personal dosemeters will be required under the revised enforcement regulations of the RI Law (from October 2023). Given these changes in the circumstance, NCL has decided to abandon the in-house measurement service and switch to commercially available accredited personal dosemeters in the future. In this paper, the development history and design concept of the TLD badge are outlined along with the historical development of the operational quantities, and the findings obtained from more than 40 years of operational experience with the TLD badge are presented.
Sanada, Yukihisa
Hokeikyo Nyusu, (68), p.2 - 6, 2021/10
Due to the impact of the Fukushima Daiichi Nuclear Power Station accident (hereinafter referred to as the power station accident) of Tokyo Electric Power Company Holdings, Inc., the surrounding environment was contaminated with radioactive substances such as radioactive cesium. After the nuclear power plant accident, plastic scintillation fiber is one of the applied wire and surface radiation measurement techniques. This paper summarizes the development process from a series of development to the introduction of the actual machine.
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).
Oigawa, Hiroyuki
Hokeikyo Nyusu, (65), P. 1, 2020/04
JAEA has issued the future vision "JAEA2050+" in October, 2019, to indicate the direction of its research and development. In this vision, JAEA is willing to contribute to realization of carbon-free society and stable supply of energy. Moreover, JAEA is willing to induce various social innovations by cooperating with research fields outside of nuclear. Under this vision, the Nuclear Science Research Institute will facilitate various activities such as creating innovation by neutron science using JRR-3 and J-PARC, improving safety of nuclear plants, reducing burden of nuclear backend, and exploring emerging technology beyond the conventional scope of nuclear energy.
Ando, Masaki
Hokeikyo Nyusu, (63), p.2 - 5, 2019/04
This is a commentary on the measurement of air dose rates by walk survey using KURAMA-II within 80 km range from the Fukushima Dai-ichi Nuclear Power Plant, which has been conducted as a commissioned research from the Nuclear Regulation Authority. The outline of KURAMA-II, the distribution map of air dose rates obtained by walk surveys, and the result of analysis concerning the decreasing trend of air dose rates are introduced based on the previous reports and thesis.
Takamatsu, Kuniyoshi
Hokeikyo Nyusu, (56), p.2 - 4, 2015/10
JP, 2010-166333
Licensable Patent Information Database 
Patent publication (In Japanese)
In our study, we focused on a nondestructive inspection method by cosmic-ray muons which could be used to observe the internal reactor from outside the RPV and the CV. We conducted an observation test on the HTTR to evaluate the applicability of the method to the internal visualization of a reactor. We also analytically evaluated the resolution of existing muon telescopes to assess their suitability for the HTTR observation, and were able to detect the major structures of the HTTR based on the distribution of the surface densities calculated from the coincidences measured by the telescopes. Our findings suggested that existing muon telescopes could be used for muon observation of the internal reactor from outside the RPV and CV.
Minato, Kazuo
Hokeikyo Nyusu, (56), P. 1, 2015/10
The number of students who study nuclear engineering decreased after the accident at the Fukushima Dai-ichi Nuclear Power Station. Securing human resources and their development should be strongly promoted in cooperation with universities, industry, and research institutes since the universities hardly maintain and operate their nuclear facilities.
Am-Be sourcesNishino, Sho
Hokeikyo Nyusu, (52), p.2 - 4, 2013/10
no abstracts in English
Tanimura, Yoshihiko
Hokeikyo Nyusu, (47), p.2 - 3, 2011/05
Japan Atomic Energy Agency (JAEA) established ten mono-energetic neutron irradiation fields at the Facility of Radiation Standards (FRS). In these fields, mono-energetic neutrons can be stably generated over a wide energy range with five digits from 8 keV to 19 MeV using an accelerator and they are used for the performance test of the neutron detectors.
Yamaguchi, Yasuhiro
Hokeikyo Nyusu, (46), P. 17, 2010/10
At the 30th anniversary of the Institute of Radiation Measurements, a praise should be given to the Institute for its great contribution to the safe development of nuclear and radiological technology in Japan. Two significant contributions should be pointed out. One is the quality improvement of radiation measurement instruments in nuclear power stations applying techniques developed by JAEA, and the other is the enlightement of radiation knowledge over the society using user-friendly radiation meters.
Shimizu, Shigeru
Hokeikyo Nyusu, (45), p.4 - 5, 2010/04
In domestic JIS original bill making Committee, JIS original bill about the calibration method of the beta radiation dose equivalent meters were discussed newly, and it was reported to Japan Standards Association. Therefore I comment on the summary of this original bill and the future prospects including knowledge as the making committee.
Sato, Tatsuhiko
Hokeikyo Nyusu, (44), p.2 - 3, 2009/10
The International Commission on Radiological Protection (ICRP) released a new set of fundamental recommendations for a system of radiological protection in ICRP Publication 103. Consequently, the dose conversion coefficients for external exposure given in ICRP74 must be revised by following the new recommendations. The status of the revision of dose conversion coefficients is reviewed in this paper.
Cf neuton fields at the FRS of JAEASaegusa, Jun
Hokeikyo Nyusu, (43), p.4 - 5, 2009/04
A 2 GBq Cf neutron source at the Facility of Radiation Standards (FRS), JAEA, has been renewed in 2008. In accordance with the renewal, the reference values for the fast and thermal neutron calibration were re-evaluated. Methods and results of the re-evaluation are reported.
Shikaze, Yoshiaki
Hokeikyo Nyusu, (42), p.2 - 3, 2008/10
no abstracts in English
Shimizu, Shigeru
Hokeikyo Nyusu, (39), p.2 - 3, 2007/05
We have started the outside usage system of various irradiation equipment of Facility of Radiation Standards of JAEA in November, 2006. This article describes the outline of the facility, usage system, administrative procedure for use. In addition, it mentions the role of Institute of Radiation Measurement in relation to the outside usage of the facilities.
Saegusa, Jun
Hokeikyo Nyusu, (37), p.2 - 3, 2006/04
A brief summary of National Physical Laboratory (NPL) and the Neuton Metrology Group of NPL are mentioned. Present status of the neutron standards, which have been positioned as a national standards in the UK, and related studies at the group are also introduced.
Miyamoto, Yukihiro
Hokeikyo Nyusu, (32), p.2 - 3, 2003/10
no abstracts in English
Yoshizawa, Michio
Hokeikyo Nyusu, (29), p.2 - 5, 2002/05
no abstracts in English
Saegusa, Jun
Hokeikyo Nyusu, (28), p.2 - 5, 2001/10
no abstracts in English
Kato, Shohei
Hokeikyo Nyusu, (27), p.2 - 3, 2001/03
no abstracts in English