Emergency cooling system for nuclear reactors

Details Emergency cooling system for nuclear reactors Emergency cooling system for nuclear reactors

1974-07-23

1976-08-31

Behrend, Harvey E.

Pipe joints or couplings

With casing, lining or protector

Insulated

176 87, 176 19R, 285 9R, 285375, G21C 900

Patent

active

039779408

ABSTRACT:
Upon the occasion of loss of coolant in a nuclear reactor as when a coolant supply or return line breaks, or both lines break, borated liquid coolant from an emergency source is supplied in an amount to absorb heat being generated in the reactor even after the control rods have been inserted. The liquid coolant flows from pressurized storage vessels outside the reactor to an internal manifold from which it is distributed to unused control rod guide thimbles in the reactor fuel assemblies. Since the guide thimbles are mounted at predetermined positions relative to heat generating fuel elements in the fuel assemblies, holes bored at selected locations in the guide thimble walls, sprays the coolant against the reactor fuel elements which continue to dissipate heat but at a reduced level. The cooling water evaporates upon contacting the fuel rods thereby removing the maximum amount of heat (970 BTU per pound of water) and after heat absorption will leave the reactor in the form of steam through the break which is the cause of the accident to help assure immediate core cooldown.

REFERENCES:
patent: 2926127 (1960-02-01), McCorkle
patent: 3346459 (1967-10-01), Prince et al.
patent: 3354040 (1967-11-01), Frame et al.
patent: 3357891 (1967-12-01), Wadmark
patent: 3481832 (1969-12-01), Rickert

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