DOE tests new sealing system for spent fuel canisters

July 18, 2025, 12:04PMRadwaste Solutions
Team members and the new closure welding system that seals canisters containing spent fuel. (Photo: DOE)

Teams from the Department of Energy’s Offices of Environmental Management and Nuclear Energy recently collaborated on the Road Ready Demonstration Project by testing new equipment to seal spent nuclear fuel into a safe and transportable system for future shipments out of Idaho.

DOE-EM and contractor Idaho Environmental Coalition (IEC), along with DOE-NE and contractor Battelle Energy Alliance (BEA), tested the capabilities and readiness of the closure welding system at the Idaho National Laboratory Site.

Designed by BEA, the system will allow DOE-EM and IEC to load spent fuel currently in an on-site dry storage facility at INL into canisters, which will then be sealed by the closure welding system.

How it works: According to the DOE, the welding system is unique in that it attaches to a canister and performs the closure weld automatically. It then uses ultrasonic testing technology to inspect the weld, ensuring that it is code-compliant and that the canister meets applicable closure requirements.

The Road Ready Demonstration Project is developing the designs, technology, processes, and licensing framework necessary to load and seal an initial “road-ready” system, which will consist of loaded canisters placed into multipurpose canisters stored inside larger transportable casks.

In addition, a transfer car has been modified to move the large transport casks containing spent fuel through a storage area.

The project: The demonstration occurred as a part of DOE-EM’s Idaho Cleanup Project, which is responsible for the management and oversight of the treatment, storage, and disposition of a variety of radioactive and hazardous waste streams, removal and disposition of targeted buried waste, and the removal of the DOE’s inventory of spent fuel and high-level waste from Idaho.


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