| 摘要 |
PURPOSE: To reduce the exposure of plant workers to radiation by lessening the friction between a pin and a roller and the abrasion of them involved in the shutdown of nuclear power actuation and the rise and fall of output. CONSTITUTION: In a combination of a pin and a roller installed in a control rod drive mechanism, the roller which touches the pin and abrades by sliding is made of a composite material, which contains carbonized silicon as a matrix and is characteristically reinforced with carbonized silicon fibers or carbon fibers. In this case, it is desirable that the carbonized fibers or the carbon fibers be arranged the circumferential direction of the roller. |
