Nuclear reactor with low-level core coolant intake

Details Nuclear reactor with low-level core coolant intake Nuclear reactor with low-level core coolant intake

1991-11-27

1993-02-02

Walsh, Donald P.

Induced nuclear reactions: processes, systems, and elements

Reactor structures

Orifice or fluid control at inlet or outlet of coolant channels

376353, 376377, G21C 1500

Patent

active

051836270

ABSTRACT:
A natural-circulation boiling-water reactor has skirts extending downward from control rod guide tubes to about 10 centimeters from the reactor vessel bottom. The skirts define annular channels about control rod drive housings that extend through the reactor vessel bottom. Recirculating water is forced in through the low-level entrances to these channels, sweeping bottom water into the channels in the process. The sweeping action prevents cooler water from accumulating at the bottom. This in turn minimizes thermal shock to bottom-dwelling components as would occur when accumulated cool water is swept away and suddenly replaced by warmer water.

REFERENCES:
patent: 3888732 (1975-06-01), Berglund et al.

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