Liquid heaters and vaporizers – Safety devices – Fire extinguishers
Patent
1990-03-28
1991-03-12
Davis, Jr., Albert W.
Liquid heaters and vaporizers
Safety devices
Fire extinguishers
122456, 122346, 122347, 16510419, 165911, F22B 3742, F22D 508
Patent
active
049985094
ABSTRACT:
A suppression chamber in a nuclear reactor containment includes a heat exchanger disposed in a gas space above water in the suppression chamber. A gravity-driven pool contains a supply of make-up water that is gravity fed to the heat exchanger through a conventional level-maintaining valve such as a float valve. A top header in the heat exchanger includes a free surface area for permitting separation of steam from water, thereby permitting venting of vapor only, while retaining the liquid coolant in the heat exchanger. A downcomer tube permits return of excess water to a lower location for further use in the heat exchanger. The heat exchanger is normally sealed, whereby internal surfaces in the heat exchanger require only a small amount of low-volatility corrosion inhibitors to prevent corrosion on internal surfaces thereof. Locating the heat exchanger in the gas space in the suppression chamber reduces the amount of corrosion on its external surfaces. Condensate drips from the heat exchanger into the water below to disturb the water and thus enhance mixing and promote heat removal.
REFERENCES:
patent: 405344 (1889-06-01), Clark et al.
patent: 586677 (1897-07-01), Wakefield
patent: 1797571 (1931-03-01), Fox et al.
Gou Perng-Fei
Townsend Harold E.
Davis Jr. Albert W.
General Electric Company
Schroeder Robert R.
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