Induced nuclear reactions: processes – systems – and elements – Reactor protection or damage prevention – With pressurizer means
Patent
1984-06-19
1986-05-13
Kyle, Deborah L.
Induced nuclear reactions: processes, systems, and elements
Reactor protection or damage prevention
With pressurizer means
G21C 108
Patent
active
045885486
ABSTRACT:
Apparatus for reducing the pressure in a pressurizer of a pressurized water type cooling system for a nuclear reactor when a predetermined pressure value is reached including a closed tank which is provided with coolant fluid outlet and inlet pipes or conduits which extend respectively from the bottom and top of the tank, and which are connectable, via a normally closed self-actuated mechanical pressure relief valve, to a spray nozzle in the upper end of the pressurizer and to the vapor space within the upper portion of the pressurizer respectively. The tank is disposed vertically above the pressurizer and is partially filled with liquid coolant which is subcooled for the pressure existing in the pressurizer, while the four-way valve is set to open in response to the predetermined pressure being reached in the pressurizer. The opening of the valve causes liquid coolant from the tank to be sprayed into the vapor space in the upper portion of the pressurizer to quench the vapor, and the vapor in the vapor space to expand into the available volume at the top of the tank, whereby the pressure in the pressurizer is reduced.
REFERENCES:
patent: 3060110 (1962-10-01), Wainrib
patent: 3448797 (1969-06-01), Chevallier et al.
patent: 3523521 (1970-08-01), Goodwin
patent: 3877478 (1975-04-01), Longworth
patent: 4051892 (1977-10-01), Reinsch
R. E. Wascher et al., "Swing Check Valves have New Application", Power, (Apr. 19, 1970), two pages.
Olivon et al., Nuclear Engineering International, May 1984, pp. 40-43.
Asztalos Michael J.
Magee Robert D.
Trinh Vuong D.
Abeles Daniel C.
Kyle Deborah L.
Wendtland Richard W.
Westinghouse Electric Corp.
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