福清核电厂汽轮发电机组非核蒸汽冲转可行性研究分析及优化

Feasibility Analysis and Optimization for Turbo-Generator Rushing with Non-Nuclear Steam in Fuqing Nuclear Power Plant

汽轮发电机组非核蒸汽冲转相较于核蒸汽冲转能够提前验证汽轮发电机组设计、制造、安装质量,缩短后续机组整组启动调试的工期,创造经济效益。依据热力学第一定律建立了汽轮发电机组非核蒸汽冲转热平衡计算公式,并得出汽轮发电机组在1500 r·min-1平台稳定时间、汽轮发电机组冲转耗能、一、二回路补水等冲转关键参数。福清核电厂1号汽轮发电机组非核蒸汽冲转顺利结束后,结合实际过程对理论计算公式进行了进一步校核,证明了理论计算方法适用于实际冲转工况,并对3号汽轮发电机组非核冲转步骤进行了优化,从而减少了汽轮发电机组非核冲转过程中一、二回路关键参数的波动,降低机组控制的风险,延长冲转时间,进一步验证汽轮发电机组的质量。通过对比福清核电厂1、3号汽轮发电机组非核冲转参数变化,进一步证明了优化措施是有效的。

Compared with the rushing with nuclear steam, the turbo-generator rushing with non-nuclear steam can be used to verify the design, manufacture and installation quality of the turbo-generator, and shortens the timescale of the system commissioning of the nuclear power plant to create huge economic benefits. By establishing the thermal equilibrium calculation equation based on the first law of thermodynamics, this paper calculates the time of turbo-generator holding at 1500 rpm, the consumed energy of the rushing, the replenishment of loop 1 and loop 2.The theoretical calculation is further checked according to the actual process of Unit 1 in Fuqing No.1 non-nuclear steam rushing. It is proved that the theoretical calculation method agrees well with the actual process of the system. In the process of non-nuclear rushing of Unit 3 in Fuqing Nuclear Power Plant, the non-nuclear rushing step is optimized to reduce the fluctuation of the key parameters of loop 1 and loop 2 during the rushing process for reducing the risk of unit control and extend the non-nuclear rushing time for further verifying the quality of the steam turbine. After the non-nuclear rushing of Unit 3 in Fuqing Nuclear Power Plant, the optimization measures were proved to be effective by comparing the non-nuclear rushing parameters between Unit 1 and Unit 3.