German engineering firm Bilfinger and research institute Fraunhofer IOSB are developing a tele-operated system to retrieve radioactive waste from the Asse II mine. The project, commissioned by Federal Company for Radioactive Waste Disposal (BGE), aims to safely recover roughly 126,000 barrels buried deep underground.

Engineers face unstable storage conditions, corrosion, and decades-old infrastructure. The effort marks one of Germany’s most complex environmental recovery operations and could shape future nuclear cleanup strategies worldwide.

Extreme recovery conditions

The Asse II mine presents a uniquely hostile environment. The storage chambers sit hundreds of meters below ground. Moisture and salt have degraded containers over time. Some barrels remain stacked, while others lie scattered or buried.

These unpredictable conditions complicate retrieval. Workers cannot safely operate directly in many areas, making remote-controlled systems essential.

Bilfinger is designing machines specifically for this challenge. The company is building a multifunctional test excavator to handle delicate recovery tasks. Engineers will equip it with specialized tools, including grapples, cutters, and buckets.

The system must balance strength with precision. It needs to move fragile, potentially leaking barrels without triggering further contamination. At the same time, it must withstand corrosive salt environments and limited visibility.

Robotics and control systems

Fraunhofer IOSB is leading the robotics and automation side. The institute brings experience from hazardous environment robotics, including its ROBDEKON research program.

Engineers are integrating sensor fusion and 3D perception systems into the machines. These tools help operators understand the underground environment in real time. Instead of relying only on camera feeds, operators will see a detailed spatial model.

Inverse kinematics plays a key role. Operators can guide tools to a target position intuitively. The system calculates the movement path automatically. This reduces human error and improves efficiency.

The team also plans to automate repetitive tasks. For example, the system could place recovered barrels into transport containers without manual control. That reduces operator workload and speeds up operations.

Remote operation and digital twin

The system centers on remote operation from a control room. Operators will work at a safe distance from radiation and unstable structures. Advanced assistance systems will guide their actions.

A digital twin of the recovery system adds another layer of control. Engineers can simulate movements, loads, and environmental conditions before real deployment. This allows teams to test scenarios and refine strategies without risk.

Bilfinger is also building a test environment that replicates the mine’s conditions. This setup helps align mechanical systems, sensors, and software before field use.

The project highlights a broader shift in nuclear cleanup. It combines robotics, heavy engineering, and simulation technologies to tackle problems beyond current capabilities.

For U.S. audiences, the implications are clear. Similar legacy waste challenges exist at sites like Hanford and other Cold War-era facilities. Technologies developed in Germany could inform future remediation efforts in the United States.

As development continues, the Asse II project stands as a test case. It shows how advanced engineering can address long-standing environmental risks while keeping workers out of harm’s way.