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.
This is where control rods come in. The control rods are lowered into the reactor to absorb some of the neutrons produced during fission reactions to keep the ratio under control. As the temperature rises, the rods are lowered, and as the temperature drops, the rods are raised to allow more fission reactions to occur. In an emergency where the reactor appears to be getting out of control, the rods are fully lowered into the reactor to shut it down altogether. Also known as absorption rods, nuclear reactor control rods are designed to operate even during a crisis situation in which a human being is not available.