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Indexed by:会议论文

Date of Publication:2011-12-01

Included Journals:EI、CPCI-S、Scopus

Volume:455-456

Page Number:314-319

Key Words:SBLOCA; nuclear main pump; half mass flow rate time; idle; transient

Abstract:In this paper, the transient of the flow field of the nuclear main pump has been analyzed in the SBLOCA and the half mass flow rate time is obtained through the simulation. The results of the simulation show that, as nuclear main pump runs down, the mass flow rate and head of the pump drops as well. The blade surface pressure is not evenly distributed. The blade bears the force of the flow. So Pump unit should have sufficient moment of inertia, so that when the reactor in an emergency shuts down caused by the failure of power supply, nucleate burning down can be avoided by cooling the core. On the braking operation condition, the half mass flow rate time required should be guaranteed. Through simulation, we find when the half time is equal to 10s, the half mass flow rate time is about 4.6s Though it is a little shorter than 5s required, the AP1000 model selected basically meet the idle requirement.