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Main pump shaft seal water injection system of a nuclear power station

机译：核电站主泵轴封注水系统

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A main pump shaft seal water injection system of a nuclear power plant includes a jet pump 50, a high pressure cooler 51, a hydrocyclone 52, valves 600, 602, 620, 620, 630 and a main connection pipeline outside of a main pump, and an auxiliary pump 55 and an internal flow path inside the main pump. Inner and outer flow paths of the main pump are connected with a shaft seal water injection hole and a high temperature water drainage hole. The main connection pipeline is connected between an upper filling water pipeline of a RCV and a shaft seal water injection hole of a main flange. The jet pump, the high pressure cooler and the hydrocyclone are arranged on the main connection pipeline. A bypass pipeline 61 connected with the jet pump, the high pressure cooler and the hydrocyclone, the main connection pipeline is provided with a normally open main pipeline isolating valve. The bypass pipeline allows low temperature upper filling water in the RCV system to bypass the jet pump, the high pressure cooler and the hydrocyclone, and enter the shaft seal water injection hole of the main flange directly.
机译：核电厂的主泵轴封注水系统包括喷射泵50，高压冷却器51，水力旋流器52，阀600、602、620、620、630和主泵外部的主连接管道，辅助泵55和主泵内部的内部流路。主泵的内部和外部流动路径与轴封注水孔和高温排水孔连接。主连接管线连接在RCV的上部注水管线和主法兰的轴封注水孔之间。喷射泵，高压冷却器和水力旋流器布置在主连接管道上。与喷射泵，高压冷却器和水力旋流器连接的旁通管线61，主连接管线设有常开的主管线隔离阀。旁路管道允许RCV系统中的低温上部填充水绕过喷射泵，高压冷却器和水力旋流器，并直接进入主法兰的轴封注水孔。

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