Cadmium shot is primarily used in nuclear reactors as a neutron-absorbing material due to its high neutron capture cross-section. It is commonly employed in control rods to regulate the fission process by absorbing excess neutrons, helping maintain reactor stability and safety. The shot form allows for easier integration into control rod assemblies and ensures consistent performance under high-radiation environments. Additionally, cadmium shot has been used in certain types of solder and low-melting alloys, though such applications are limited today due to the toxicity of cadmium. Its use is largely restricted to specialized industrial and nuclear applications where its unique neutron absorption properties are essential.