Sandia prototypes robotic system to automate repackaging of spent nuclear fuel rods

A presenter demonstrated a laboratory prototype developed by Sandia National Laboratories intended to automate the repackaging of spent nuclear fuel rods into modern storage casks.

The presenter said the system was built to address high storage costs and workforce radiation risk associated with manual repackaging, and that the U.S. Department of Energy has a legal obligation to manage the disposition of commercial spent nuclear fuel (no statute was cited). "To tackle the high costs, Sandia National Laboratories has prototyped a robotic system to automate the repackaging of spent nuclear fuel rods," the presenter said.

The demonstration used half-sized mock fuel rods in a simulated pool setting. The presenter described the design as split into four subassemblies: an extraction subassembly that moves into place and lowers a gripping unit; a gripping unit that aligns, grasps and pulls rods out of the mock fuel assembly; consolidation modules that support and raise rods while hinged actuators prevent them from falling; and a descent subassembly that inserts the rods into the new cask. A cam in each consolidation module rotates to adjust rod spacing to match the geometry of the receiving cask, and clutched rollers in the descent unit provide a limited push-down force to mitigate jams caused by minor rod-geometry imperfections.

The presenter noted that spent fuel rods produce heat from radioactive decay and typically require cooling in spent-fuel pools for roughly 10 to 20 years, and that modern cask designs aim to increase the number of rods stored in wet and dry storage. The presenter also cautioned that repackaging into modern casks carries "high initial costs and workforce risk due to radiation hazards." The prototype simulates the process in a laboratory setting with half-sized mock rods, and the speaker said a potential final design would be deployed in a spent nuclear fuel pool if subsequent development and approvals proceed.

The demonstration concluded after a walkthrough of the mechanical sequence and stated process repetition: once rods are fully inserted, the cycle begins again. The transcript does not specify the demonstrator's affiliation beyond the mention of Sandia National Laboratories nor a date for the demonstration, and it includes no formal action, vote or procurement decision.