Casting technique optimization of the primary coolant bent pipes used for a pressurized water reactor nuclear power plant by ProCAST software
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摘要: 利用ProCAST軟件對壓水堆核電站一回路90°彎管的充型和凝固過程進行了模擬.結果表明,澆注過程中金屬液充型平穩,澆注系統設計符合順序凝固原則.利用固相率法預測了彎管易出現縮孔縮松的位置,優化設計后獲得了無縮孔縮松的彎管鑄造工藝.研究表明,運用ProCAST軟件有利于提高彎管鑄件的工藝出品率.Abstract: The filling and solidification processes of the primary coolant 90° bent pipes in pressurized water reactors(PWR) were simulated by ProCAST software.The simulation results show that molten steel can be filled smoothly,which demonstrates that the gating system plan meets the directional solidification principle.The locations of shrinkage and porosity in the bent pipes were predicted by using the solid fraction method.A series of technique optimizations were carried out in order to eliminate the shrinkage and porosity,so an optimized casting technique was finally obtained for the bend pipes.It is indicated that the casting yield of the bent pipes can be increased using ProCAST software analysis.
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Key words:
- nuclear power plants /
- pressurized water reactors /
- pipes /
- casting /
- computer simulation
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