International SOS Clinic Nanjing. Address: 1st floor of Hilton Hotel, No.319 at Zhongshan Donglu. Opening hours. Monday to Friday 9am to 6pm. Saturday 24hr emergency care only.
Control Rods. The nuclear chain reaction may be controlled using a device called a control rod. Control rods are made of materials which absorb neutrons. Thus, when a control rod is inserted into a nuclear reactor it reduces the number of free neutrons available to cause the uranium atoms to fission.
The cluster design is based on the realization that a single, large control rod in the nuclear reactor would create very nonuniform temperature and fission dynamics. By instead using a large number of evenly spaced, smaller control rods, uniform densities of neutrons and fissions can be achieved.