核电站一回路中颗粒物对管路延寿影响的研究

PWR nuclear power plant primary circuit as the "aorta" and its security in the entire nuclear power plant is very important. In the reactor operation, due to the fuel rods, reactor components and other components will be affected by coolant through corrosion, erosion, abrasion-corrosion, FAC effect, etc., will produce many of the small particles. These particles will enter primary circuit with the coolant, and the formation of Liquid-solid two phase flow in the loop. Within the calculation scope of this study, through the study found, compared with the pure phase fluid, two-phase flow makes primary circuit of heat transfer significantly increase, this will have effect on heat transfer of the primary circuit, and occur the deterioration of partial heat transfer, affect the pipe of using life. In addition, the particles will enter primary circuit with the coolant, and it will be primary circuit produce physical abrasion, corrosion, abrasion-corrosion, FAC effects, etc. they will affect the performance of primary circuit, even undermine the integrity of primary circuit.