A robot has successfully surveyed an underground radioactive ventilation duct in Dounreay’s redundant laboratories.
Dounreay Site Restoration Ltd (DSRL) and the Robotics and Artificial Intelligence in Nuclear (RAIN) Hub are working together to develop a robot capable of accessing areas that are inaccessible or unsafe for humans to work in. The RAIN Hub is a consortium of universities led by the University of Manchester.
In 2020 a group of engineers from RAIN brought a small surveying remotely operated vehicle equipped with sensors, cameras and a manipulator ‘arm’ to the two nuclear establishments on the north coast of Scotland. Initial trials in an inactive building provided useful information, the team said, and a limited survey in the laboratories took place last year.
As a result of this field research, a second-generation robot called Lyra was developed, with an improved package of surveying measures including lidar, multiple angle cameras, radiation probes and the ability to take swabs using the manipulator arm.
RAIN Hub director, Barry Lennox, said: “We wanted to demonstrate that the robot could be used successfully in active areas. We added fail safe devices, including a remote “reboot” switch, and a winch to enable us to physically retrieve the robot if it got stuck on the debris in the duct.”
In February, the robot returned to carry out a survey of the 140m long underfloor duct which runs under the central corridor between the laboratories, providing useful information that will help to solve the challenge of decommissioning it.
DSRL project manager, Jason Simpson, added: “Now the characterisation survey is complete we have built up a very comprehensive picture of the duct, which will help us make informed decisions on how the duct should be decommissioned.”
