1. In the boiling water reactor, carbonized turning powder is used as the absorber of the control rod. The carbonized turning powder is loaded into the stainless steel tube by vibration filling method, and the density is reached to 70% theoretical density by rotary forging.

2. In the pressurized water reactor, at the initial stage, nI - dC alloy was used as neutron absorbing material, and the outer key was used to fill. In the near future, the side of the control rod was also used to form a bundle of control rods in the stainless steel shell, and carbonized reversing block was also used as absorbing material.

3. The reactivity control of heavy water reactor is similar to that of pressurized water reactor, which is also controlled by control rod and chemical compensation agent.

Its control rod is the boron carbide powder into the stainless steel tube and composed of the ring - shaped components.

4. The high-temperature gas-cooled reactor has higher requirements on the radiation performance of materials due to its high working volume.In order to improve the anti - irradiation ability of boron carbide, often using boron carbide and carbon combined to make the cylindrical shape of the neutron absorber, into the stainless steel shell, made into a control holding for use.