| With the progress of the energy industry,the energy consumption is skyrocketing.Years of continuous mining has led to the depletion of shallow non-renewable energy on the surface.The cost of resource underground and deep sea is rising,and the mining technology has achieved lots of breakthrough.Nuclear power energy is of great importance to solve the current dilemma.The benefits of commercial nuclear power are obvious,but the dismantlement after retirement also consumes a lot.The disassembly technology is related to the rise and fall of nuclear power and imperative for decommissioned nuclear power.The dismantlement of containment block by block serves as the first step in the dismantlement of the nuclear containment.This paper plans to design a diamond rope saw and its carrier,and complete the structural design according to the technical requirements for construction.The rope saw can cut,lift,move horizontally and turnover.The vehicle can transport the rope saw to any designated position on the containment wall.After the two cooperate,the efficient removal of the nuclear containment can be realized.The selection and design of key components are completed,and finally the disassembly of nuclear containment by diamond rope saw and its vehicle is formulated.The disintegration of the containment of decommissioned nuclear power plant by rope saw can be regarded as the cutting work of diamond particles on reinforcement and concrete.The cutting depth and cutting speed parameters are changed successively by using the finite element analysis method,and the cutting force and force variance of particles under each parameter are analyzed.The relationship between cutting efficiency and the service life of diamond particles is studied,and the existing cutting parameters are optimized to provide more reasonable cutting parameters for wire saw disassembly of nuclear power containment.Combined with the cutting performance of diamond particles on concrete and reinforcement,it is concluded that the cutting speed of Beaded rope should be in the range of 24m/s～26m/s and the cutting depth should be 20μm～30μm.To avoid diamond particles falling off before wear failure,a new research method of holding force is to be explored.The functional relationship between tangential force and normal force during diamond particle cutting is deduced,and then the total cutting force during diamond particle cutting is obtained;At the same time,the holding force of diamond particles embedded in the surface layer of the matrix is studied,and the critical holding force of diamond particles under different parameters is obtained.The difference between the total cutting force on diamond particles and the critical holding force under corresponding parameters is regarded as safety margin.The safety margin of each group is analyzed,and combined with the mean value and variance of cutting force,it is further determined that the cutting speed of bead rope cutting containment wall should be 26m/s and the single cutting depth should be 25 μm.The diamond bead rope needs to pass through the drilling hole on the nuclear containment to realize the disassembly of the containment.The matching model between the bead rope and the perforation spacing is analyzed,and the functional relationship between the volume of material to be removed by the bead rope to cut off the wall in the two perforation spacing and the moving distance of the bead rope is deduced;The cutting experiment of bead rope on concrete and reinforcement is carried out,the cutting distance of the experimental bead rope before wear failure is obtained respectively,and it is converted into the cutting distance that the bead rope on the designed diamond rope saw can move before complete wear.Finally,according to the life criterion,the mathematical model for optimizing the perforation spacing on the nuclear containment is established,It provides a theoretical basis for pre drilling of nuclear containment and improves the disassembly efficiency of nuclear installation. |
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