Core catcher device

Details Core catcher device Core catcher device

1978-06-23

1981-07-28

Miles, Edward F.

176 65, G21C 900, G21C 1302

Patent

active

042808723

ABSTRACT:
In a fast reactor having a diagrid structure supported on the bottom wall of a reactor vessel containing the core and liquid metal coolant, a core catcher serves in the event of core melt-down to prevent hot debris carried down by the liquid metal from coming into contact with the vessel walls. The core catcher comprises a single collecting tray having a large area, a central chimney and a bearing shell extending parallel to the bottom wall of the reactor vessel. An enclosed space is formed between the bottom wall, the diagrid support structure and the diagrid and contains the collecting tray. Under melt-down conditions, the temperature differences produced by the molten fuel deposited on the tray and the presence of the central chimney have the effect of setting up a natural circulation of liquid metal and consequently of cooling the fuel.

REFERENCES:
patent: 3554868 (1971-01-01), Thorp
patent: 3719556 (1973-03-01), Snyder
patent: 3992256 (1976-11-01), Lleres
patent: 4011132 (1977-03-01), Kumpt
patent: 4062724 (1977-12-01), Broadley

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