DefinePK

Abstract

The failure of a jet pump may produces a leakage in the slip joint or a rupture in the riser pipe. The failure occurs when the jet pumps are out of the range of their natural frequency. The aim of this work is study the reactor safety operation under the failure of a jet pump through the transient analysis. This work presents four scenarios that correspond to the severity of the jet-pump failure. The behavior of essential variables such as: power reactor, reactor water level, water mass flow rate in the core and recirculation, among others, are analyzed. The results show that the reactor self-controls without the need of the operator intervention in less than 20 seconds. When the failure is 100%, the power reactor decreases about 20% in approximately one and a half seconds and stabilizes at 94% of the nominal power. The mass flow in the core is stabilized above 96%. The total core flow is the most significant parameter in case the jet pumps failure for long period.