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General Atomic Company

Johann Friedrich Gulich

Jack S Yampolsky

George E Lockett

James P Elliott

Max H Weber

Paul S Hunt

The erosion caused by cavitation in components through which fluid flows, such as, for example, a pump (1), can be derived by detecting the vibration in the pump casing. The fluid-borne noise caused by cavitation is transferred to the pump casing and is detected by a sensor (7b) of a structure-borne noise measuring device (7a), amplified, filtered and digitalized in a signal processing unit (10) and transmitted to a computer (11). Further measuring data detection devices such as the outlet pressure measuring device (6), the suction pressure measuring device (8), the fluid temperature measuring device (9) or the revolution counter (4) enable the computer (11) for example to calculate the flow rate or the correlation between the flow rate and the erosion rate. The values determined can be displayed via an output unit (13); for example, if a boundary value preset via an input unit (12) is exceeded, the output unit (13) activates a warning, for example.

Process and a device for determining the erosion caused by cavitation in

A vapor generator and heat exchanger, particularly suited for use in a substantially cylindrical cavity in a pressure vessel includes high and low temperature sections of the vapor generator positioned coaxially with the annular outer section terminating a distance from the end of the central or axial section to form at the one end an annulus arranged between the central or axial section and the pressure vessel wall. A plurality of reheater or heat exchanger sections and various inlet and outlet conduits are positioned in the annulus. A heating fluid is directed first transversely over the tubes of the reheater sections, then along the tubes of the central or axial high temperature section after passing over the outer annular low temperature section.

Vapor generator

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Winterthur, Switzerland

Johann Friedrich Gulich