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JAEA Reports

Challenge to investigation of fuel debris in RPV by an advanced super dragon articulated robot arm (Contract research); FY2020 Nuclear Energy Science & Technology and Human Resource Development Project

Collaborative Laboratories for Advanced Decommissioning Science; Tokyo Institute of Technology*

JAEA-Review 2021-045, 65 Pages, 2022/01

JAEA-Review-2021-045.pdf:3.41MB

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 FY2020. 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 FY2019, this report summarizes the research results of the "Challenge to investigation of fuel debris in RPV by an advanced super dragon articulated robot arm" conducted in FY2020. The present study aims to develop the implementation techniques of the remote sensing method on a robot arm for monitoring the structure status in the reactor and the distribution of nuclear materials by a long-articulated robot arm with controlling and grasping the position and posture of the robot arm hand. In FY 2020, we have conducted fundamental operation check of the robot arm in the simulated environment, prototype construction of telescopic articulated arm and cable storage mechanism, investigation of drive wire specifications, improvement of LIBS probe, prototype construction of microchip

JAEA Reports

Challenge to investigation of fuel debris in RPV by an advanced super dragon articulated robot arm (Contract research); FY2019 Nuclear Energy Science & Technology and Human Resource Development Project

Collaborative Laboratories for Advanced Decommissioning Science; Tokyo Institute of Technology*

JAEA-Review 2020-040, 55 Pages, 2021/01

JAEA-Review-2020-040.pdf:3.95MB

JAEA/CLADS had been conducting the Nuclear Energy Science & Technology and Human Resource Development Project in FY2019. Among the adopted proposals in FY2019, this report summarizes the research results of the "Challenge to Investigation of Fuel Debris in RPV by an Advanced Super Dragon Articulated Robot Arm" conducted in FY2019.

Journal Articles

Theory of transport properties in the $$p$$-wave superconducting state of Sr$$_2$$RuO$$_4$$; A Microscopic determination of the gap structure

Nomura, Takuji

Journal of the Physical Society of Japan, 74(6), p.1818 - 1829, 2005/06

 Times Cited Count:24 Percentile:73.44(Physics, Multidisciplinary)

We provide a detailed quantitative analysis of transport properties in the $$p$$-wave superconducting state of Sr$$_2$$RuO$$_4$$. Specifically, we calculate ultrasound attenuation rate and electronic thermal conductivity within the mean field approximation. The momentum dependence of the gap function is determined by solving the Eliashberg equation for a three-band Hubbard model with the realistic electronic structure of Sr$$_2$$RuO$$_4$$. Consequently, we obtain the temperature dependence of the transport coefficients in agreement with the experimental results.

Journal Articles

Measurement and monitoring of phase interfaces between gas-liquid and liquid-liquid using ultrasonic wave

Akino, Norio; Koyano, Kiyoshi*; Usui, Yoshiko*; Ota, Naomi*

Kashika Joho Gakkai-Shi, 21(Suppl.2), p.147 - 148, 2001/09

no abstracts in English

JAEA Reports

Basic experiment on preprocessing of ultrasonic signal by inverse filtering technique

Ishikawa, Nobuyuki; Fujii, Yoshio; Shinohara, Yoshikuni

JAERI-M 92-171, 24 Pages, 1992/11

JAERI-M-92-171.pdf:0.66MB

no abstracts in English

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