摘 要: AP1000核电站的一回路包括两个并联的环路、两个蒸汽发生器，屏蔽式主泵挂在蒸汽发生器下水室封头。本文介绍了AP1000屏蔽主泵的主要部件，分析了其用于核电站的优势和缺点，从制造、电机的冷却、可靠性和可用率、维修等几个方面论述了AP1000屏蔽泵可能面临的挑战。

Abstract: The AP1000reactor coolant system consists of two heat transfer circuits, each with a steam generator and two reactor coolant pumps under the channel of generator. It introduce the main parts of AP1000 canned pump, analysis the advantages and disadvantages of application in nuclear power station, state the challenges which pump will face in manufacturing, motor cooling, reliability and availability.