Induced nuclear reactions: processes – systems – and elements – Reactor structures – Orifice or fluid control at inlet or outlet of coolant channels
Patent
1994-07-07
1996-04-30
Wasil, Daniel D.
Induced nuclear reactions: processes, systems, and elements
Reactor structures
Orifice or fluid control at inlet or outlet of coolant channels
G21C 1500, G21C 3322
Patent
active
055132332
ABSTRACT:
Improved operability and economy of a nuclear reactor can be obtained by attaining a mixing of the flows of coolant in the lower plenum of the fuel assemblies of the nuclear reactor, a high flow stability of the two-phase flow in the fuel assemblies and a small pressure loss in the core. To achieve this, there is provided a coolant guide tube 60 that communicates with the inside of the fuel support piece 12 inserted in the control rod guide tube and the passage 16, wherein there is formed a coolant guide passage 61 along which coolant descends in the area outside of the coolant guide tube in the fuel assemblies from opening 79. The coolant guide passage along which the coolant descends from the opening is formed in an area outside of the coolant guide tube in the fuel support piece.
REFERENCES:
patent: 3873419 (1975-03-01), Sletten
patent: 4654194 (1987-03-01), Christiansen et al.
patent: 4826653 (1989-05-01), Nylund et al.
Hidaka Masataka
Kashiwai Shin-ichi
Kawasaki Terufumi
Saito Yoshinori
Hitachi , Ltd.
Wasil Daniel D.
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