Method and means for abruptly terminating the flow of fluid in c

Details Method and means for abruptly terminating the flow of fluid in c Method and means for abruptly terminating the flow of fluid in c

1973-09-04

1978-02-14

Croyle, Carlton R.

Rotary kinetic fluid motors or pumps

Plural runners having different type flow paths

415147, 138 46, F03B 1506, F04D 110, F01D 1700, F15D 100

Patent

active

040735958

ABSTRACT:
A nuclear steam supply system wherein each of a plurality of centrifugal pumps begins to operate with full cavitation in response to an abrupt drop of system pressure in the event of leakage. This is achieved by influencing the net positive suction head of each pump over the entire range of fluid flow and/or by influencing the net positive suction head upstream of the pumps. The first mode of causing the pumps to operate with full cavitation includes an appropriate selection of the inlet angle and/or inlet diameter of pump impeller, or the provision of suitably curved guide vanes in the pumps. The second mode includes interrupting the admission of undercooled fluid into the system upstream of the pumps.

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