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Some CEA research activities in support of Fukushima Daiichi fuel debris retrieval [PDF]

Nuclear Engineering and Design
Fuel debris retrieval is one of the important challenges in view of Fukushima Daiichi decommissioning. Indeed, hundreds of tons of fuel debris will have to be cut and collected in the 3 units that have been subject to core meltdown in March 2011. A large R&D effort has been supported by the Japanese stakeholders in support of this retrieval.
Christophe Journeau, Laurent Brissonneau   +1 more
exaly   +5 more sources

Numerical Simulation and Validation of Aerosol Particle Removal by Water Spray Droplets With OpenFOAM During the Fukushima Daiichi Fuel Debris Retrieval [PDF]

Frontiers in Energy Research, 2020
In the decommissioning of damaged Fukushima Daiichi reactors, the melted and re-solidified fuel debris in the bottom of the reactor pressure vessel and primary containment vessel need to be cut into small pieces before removing them from reactor ...
Hui Liang, Nejdet Erkan, Virginie Solans, Shunichi Suzuki   +3 more
doaj   +4 more sources

Development of a numerical simulation method for air cooling of fuel debris by JUPITER [PDF]

Mechanical Engineering Journal, 2023
A detailed evaluation for air cooling of fuel debris in actual reactors will be essential in fuel debris retrieval under dry conditions. To understand the heat transfer in and around fuel debris, which is assumed as a porous medium in the primary ...
Susumu YAMASHITA, Shinichiro UESAWA, Ayako ONO, Hiroyuki YOSHIDA   +3 more
doaj   +2 more sources

Analysis of gadolinium oxide using microwave-enhanced fiber-coupled micro-laser-induced breakdown spectroscopy [PDF]

Scientific Reports, 2023
We report on the analysis of pure gadolinium oxide (Gd2O3) and its detection when mixed in surrogate nuclear debris using microwave-enhanced fiber-coupled micro-laser-induced breakdown spectroscopy (MWE-FC-MLIBS).
Yuji Ikeda, Joey Kim Soriano, Hironori Ohba, Ikuo Wakaida   +3 more
doaj   +2 more sources

A NEW CONCEPT FOR LARGE-SCALE FUEL DEBRIS RETRIEVAL

Proceedings of the International Topical Workshop on Fukushima Decommissioning Research, 2022
Suzuki, Shunichi, Satomi, Sui, Ozdemir, Erdal, Noda, Atsushi   +3 more
exaly   +2 more sources

Fuel debris retrieval and robot technology

Atomos, 2023
exaly   +2 more sources

Development of Robot Simulating Fuel Debris Retrieval

Journal of Robotics and Mechatronics, 2022
A creative robot contest for decommissioning was held as part of human resources development for decommissioning of the Fukushima Daiichi Nuclear Power Station of Tokyo Electric Power Co., Inc. In the 5th creative robot contest for decommissioning, robots were developed for fuel-debris retrieval from the lower part of the pedestal.
Shigekazu Suzuki, Hiroha Toba, Takumi Takeda, Yuta Togashi, Takahiro Akao   +4 more
openaire   +1 more source

Developments of Robots for Fuel Debris Retrieval by Side Entry Method

Journal of the Robotics Society of Japan, 2018
Ken Onishi
exaly   +3 more sources

Characterization of Oxidic Fuel Debris Simulants with Different Compositions and Heat Treatments for Evaluation of Airborne Release During Fuel Debris Retrieval

Proceedings of the International Topical Workshop on Fukushima Decommissioning Research
Kinya Nakamura, Tadafumi Koyama, Masaki Yoda   +2 more
exaly   +2 more sources

EVALUATION OF AIRBORNE RELEASE BEHAVIOURS DURING CUTTING FUEL DEBRIS FOR FUTURE SAFETY ASSESSMENT OF FUEL DEBRIS RETRIEVAL - PROJECT OVERVIEW -

Proceedings of the International Topical Workshop on Fukushima Decommissioning Research
Koichi Uozumi, Kinya Nakamura, Tadafumi Koyama   +2 more
exaly   +2 more sources