Here is a robotic system that can help with monitoring nuclear accidents. RAM consists of an unmanned ground vehicle with all-terrain capability, a drone, and a radiation sensor module. It has a max speed of 60km/h and payload of 160 kg. It has an operating range of 1km.
The drone can be used to monitor accidents from the air. It has a flight range of over 1km. The sensor is used for radiation dose map generation.