1. The reactor coolant pump provides sufficient forced circulation flow to ensure adequate heat transfer.
1. 主泵提供足夠的強(qiáng)迫循環(huán)流量，以保證有充分的熱傳遞能力。
2. The reactor coolant pump is vertical, single stage, centrifugal pump to pump large volumes of reactor coolant at high temperature and pressure.
2. 主泵為立式，單級(jí)離心泵，大流量，能承受高溫、高壓。
3. The pump consists of three sections from bottom to top: the hydraulic section, the shaft seal section and the motor section.
3. 主泵由三個(gè)部分組成(由下而上)：水力部件，軸密封部件和電機(jī)部件。
4. The hydraulic section consists of the inlet and outlet nozzles, casing, flange, impeller, diffuser, pump shaft, pump bearing, thermal barrier and thermal barrier heat exchanger.
4. 水力部件由以下組成：出入口管，殼體，法蘭，葉輪，導(dǎo)葉，泵軸，泵軸承，熱屏和熱屏熱交換器。
5. The shaft seal section consists of the number one, controlled leakage seal and the number two and three rubbing face seals. These seals are located within the main flange and seal housing.
5. 軸密封組件由一級(jí)，控制泄漏密封和二、三級(jí)機(jī)械密封組成。這些密封位于主法蘭和密封殼里。
6. The motor section consists of a vertical, squirrel cage; induction motor with an oil lubricated double Kingsbury thrust bearing, two oil lubricated radial bearings, a flywheel and help establish natural circulation.
6. 電機(jī)部件包括一個(gè)立式，鼠籠感應(yīng)式電機(jī)，一個(gè)油潤滑雙導(dǎo)向推力軸承，兩個(gè)油潤滑徑向軸承，和一個(gè)有助于建立自然循環(huán)的飛輪。
7. A flywheel extends flow coastdown after a loss of power to maintain flow through the core and appropriate support equipment.
7. 飛輪延長了失電情況下的主泵惰走時(shí)間，能延長失電時(shí)通過堆芯及其輔助設(shè)備的流量供應(yīng)。
8. An anti-reverse rotation device prevents the pump from turning backwards which would increase core bypass flow and pump starting current.
8. 止逆裝置用于防止泵反轉(zhuǎn)，反轉(zhuǎn)將導(dǎo)致堆芯旁通流量增加和泵啟動(dòng)電流增加。
9. Shaft sealing is accomplished by a film riding controlled leakage seal with a backup rubbing face seal.
9. 軸密封原理是控制通過機(jī)械密封動(dòng)靜環(huán)之間的水膜泄漏來完成密封的。
10. The operation of the seal package assures near zero leakage from reactor coolant system at the reactor coolant pump shaft.
10. 軸密封的運(yùn)行保證了在主泵軸密封處沒有主冷卻劑的泄漏。
11. Seal water injection through the thermal barrier heat exchanger cools and lubricates the seal and pump bearing.
11. 通過熱屏熱交換器的軸密封水對(duì)密封和軸承起到冷卻和潤滑作用。
12．Cooling for the motor bearing and barrier heat exchanger is from the component cooling water system.
12. 冷卻電機(jī)軸承和熱屏熱交換器的水來自設(shè)備冷卻水系統(tǒng)。
