Nuclear reactor core flooding by control of shroud leakage and f

Details Nuclear reactor core flooding by control of shroud leakage and f Nuclear reactor core flooding by control of shroud leakage and f

1996-03-11

1999-02-23

Wasil, Daniel D.

Induced nuclear reactions: processes, systems, and elements

Reactor protection or damage prevention

Fluid flow reversal protection

376352, G21C 1502

Patent

active

058752226

ABSTRACT:
The bypass opening of the tie plate of a fuel assembly of a nuclear reactor is provided with a flow restricting or check valve such that flow during normal operation upwardly through the tie plate and bypass opening is maintained. In the event of a loss of coolant accident, and degradation of a core spray sparger system, backflow leakage through the tie plate is minimized or eliminated by the valves, enabling the core spray sparger system to flood the core about the fuel assemblies and provide spillover coolant into the open top ends of the fuel assemblies. Additionally, because the fuel assemblies change in length over time, a uniform coolant flow distribution into the fuel assemblies upon loss of coolant accident is achieved by providing metering holes through the channels whereby each channel receives substantially the same flow of coolant from the flooded core.

REFERENCES:
patent: 4716011 (1987-12-01), Taleyarkhan
patent: 5167911 (1992-12-01), Fujimura et al.

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