Post-LOCA core flushing system

Details Post-LOCA core flushing system Post-LOCA core flushing system

1976-03-17

1980-01-01

Engle, Samuel W.

176 58R, 176 62, G21C 900

Patent

active

041815700

ABSTRACT:
A system is disclosed for flushing the core of a nuclear reactor after a loss-of-coolant accident. A pump causes flow of liquid-phase fluid from the containment-vessel sump. This flow is used to provide the motivating force for an eductor that causes suction at the hot leg of the reactor. The eductor suction can draw gas-phase coolant out of the hot leg. As a result, it can reduce pressure which may be preventing the flow of liquid-phase coolant out of the hot leg. By causing liquid-phase flow through the reactor, the system ensures that particles and boric acid are flushed out of the core. The system thereby eliminates the build-up of particles and the concentrations of boric acid in the core that could result if the coolant were to leave the pressure vessel exclusively in the gas phase.

REFERENCES:
patent: 3575807 (1971-04-01), Ripley
patent: 3859166 (1975-01-01), Flynn et al.
patent: 3929567 (1975-12-01), Schabert et al.
patent: 4051892 (1977-10-01), Reinsch

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