A team of researchers from the Korea Institute of Machinery and Materials ( KIMM ) has developed underwater laser cutting technology that enables the safe and more precise dismantling of nuclear structures.
Underwater technology that improves nuclear decommissioning
This project is led by Dr. In-Deok Park, who is leading a KIMM research team to design an underwater laser cutting system that can cut stainless steel up to 100 mm thick and under 10 meters of water.
The technology uses high-power lasers , optimizing the cutting width to 2 mm and reducing the gas flow rate to 600 l/min, contributing to efficient operation with a cutting speed of up to 50 mm/min. These features help minimize secondary contamination and reduce the generation of radioactive waste.
For testing in conditions similar to those of nuclear decommissioning , the team developed and patented a 30-meter-deep pressurized tank, the first of its kind in the world. This tank allows simulating high-pressure underwater environments, ensuring that cutting is carried out in a controlled manner and with minimal risk. In addition, KIMM developed an anti-collision device that protects the cutting nozzle, improving safety in complex environments.
According to Dr. Park, underwater laser cutting technology can address critical challenges in decommissioning nuclear facilities, as many nuclear reactors are expected to be decommissioned by 2050.
The testing of this technology was supported by several Korean universities in collaboration with the Korean Ministry of Trade, Industry and Energy and is part of a larger effort to improve safe decommissioning capabilities and reduce risks in the process.
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Source and photo: KIMM
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