Four 100 kg nuclear emergency response robots, designed by China General Nuclear Power Corporation (CGN) and the CAS Institute of Optics and Electronics serve at Daya Bay Nuclear Power Plant in Guangdong province since last November. They carry out both land and underwater missions, including salvaging and observations. They are able to withstand temperatures of up to 65 degrees Celsius and nuclear radiation at up to 10,000 Sv per hour.
CAS news release, June 23, 2017