Development of a high-resolution imaging camera for alpha dust and high-dose rate monitor (Contract research); FY2023 Nuclear Energy Science & Technology and Human Resource Development Project

Collaborative Laboratories for Advanced Decommissioning Science; Tohoku University*

JAEA-Review 2025-048, 56 Pages, 2026/02

JAEA-Review-2025-048.pdf:2.89MB

The Collaborative Laboratories for Advanced Decommissioning Science (CLADS), Japan Atomic Energy Agency (JAEA), had been conducting the Nuclear Energy Science & Technology and Human Resource Development Project (hereafter referred to "the Project") in FY2023. The Project aims to contribute to solving problems in the nuclear energy field represented by the decommissioning of the Fukushima Daiichi Nuclear Power Station, Tokyo Electric Power Company Holdings, Inc. (TEPCO). 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 FY2022, this report summarizes the research results of the "Development of a high-resolution imaging camera for alpha dust and high-dose rate monitor" conducted in FY2023. The present study aims to develop a high-resolution imaging camera for alpha dust and a high-dose rate monitor. To realize the high-resolution imaging camera for alpha dust, we have developed novel scintillation materials with emission bands of 500-800 nm. Moreover, we have prepared several materials for the camera and software. We have also developed novel scintillation materials with emission bands of 650-1,000 nm, and simulation studies have been conducted for the high-dose-rate monitor system consisting of optical fiber. In addition, we demonstrated this monitoring system, and the dose-rate dynamic range was found to be 20 mSv/h to 1 kSv/h.

Development of high-resolution imaging camera for alpha dust (Contract research); FY2021 Nuclear Energy Science & Technology and Human Resource Development Project

Collaborative Laboratories for Advanced Decommissioning Science; Tohoku University*

JAEA-Review 2022-065, 111 Pages, 2023/03

JAEA-Review-2022-065.pdf:6.8MB

The Collaborative Laboratories for Advanced Decommissioning Science (CLADS), Japan Atomic Energy Agency (JAEA), had been conducting the Nuclear Energy Science & Technology and Human Resource Development Project (hereafter referred to "the Project") in FY2021. The Project aims to contribute to solving problems in the nuclear energy field represented by the decommissioning of the Fukushima Daiichi Nuclear Power Station, Tokyo Electric Power Company Holdings, Inc. (TEPCO). 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 "Development of high-resolution imaging camera for alpha dust" conducted from FY2018 to FY2021. Since the final year of this proposal was FY2021, the results for four fiscal years were summarized. The present study aims to develop a novel alpha-ray camera consisting of imaging and an energy spectrometer to find the alpha dust to reduce the risk of health damage in decommissioning. We have developed the camera with a position resolution of less than 10 m, and the measurement test for the energy spectra was operated using several alpha-ray sources with an unfolding method.

Infrared absorption and Raman scattering spectra of water under pressure via first principles molecular dynamics

Ikeda, Takashi

Journal of Chemical Physics, 141(4), p.044501_1 - 044501_8, 2014/07

https://doi.org/10.1063/1.4890369

From both the polarized and depolarized Raman scattering spectra of supercritical water a peak located at around 1600 cm, attributed normally to bending mode of water molecules, was experimentally observed to vanish, whereas the corresponding peak remains clearly visible in the measured infrared (IR) absorption spectrum. In this computational study a theoretical formulation for analyzing the IR and Raman spectra is developed via first principles molecular dynamics combined with the modern polarization theory. We demonstrate that the experimentally observed peculiar behavior of the IR and Raman spectra for water are well reproduced in our computational scheme. We discuss the origins of a feature observed at 1600 cm in Raman spectra of ambient water.

X-ray and fourier transformed infrared investigation of -SiC growth by ion Implantation

Zhang, Z.; Narumi, Kazumasa; Naramoto, Hiroshi; Yamamoto, Shunya; Miyashita, Atsumi

Journal of Physics D; Applied Physics, 32(17), p.2236 - 2240, 1999/09

https://doi.org/10.1088/0022-3727/32/17/313

no abstracts in English

Infrared multiphoton dissociation mechanism of 1,2-dichlorotrifluoroethane in a molecular beam

; Yokoyama, Keiichi;

Bulletin of the Chemical Society of Japan, 68, p.3355 - 3363, 1995/00

https://doi.org/10.1246/bcsj.68.3355

no abstracts in English

Statistical thermodynamic properties of uranium hexafluoride

Oda, Tetsuzo

JAERI-M 93-052, 49 Pages, 1993/03

JAERI-M-93-052.pdf:1.11MB

no abstracts in English

Infrared microspectroscopy of minerals; A new microphase characterization technique in earth science.

Nihon Denshi Nyusu, 27(1-2), p.12 - 17, 1987/02

no abstracts in English

IR spectroscopic studies of some uranyl tetrachloride complexes

Owada, Ken

Journal of Inorganic and Nuclear Chemistry, 40(7), p.1369 - 1374, 1978/07

https://doi.org/10.1016/0022-1902(78)80052-9

no abstracts in English

Evaporation of alpha bearing aqueous wastes on a laboratory scale

;

Radiochem.Radioanal.Lett., 18(2), p.51 - 59, 1974/02

no abstracts in English

Infrared-absorption studies on some organic phosphates

Owada, Ken

Applied Spectroscopy, 21(5), p.332 - 335, 1967/00

http://www.opticsinfobase.org/as/abstract.cfm?URI=as-21-5-332

no abstracts in English