Device for measuring recirculating flow rate in a nuclear reacto

Induced nuclear reactions: processes – systems – and elements – Testing – sensing – measuring – or detecting a fission reactor... – Temperature or pressure measurement

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7386152, G21D 100

Patent

active

048428060

ABSTRACT:
The recirculating flow rate of the primary coolant recirculated a nuclear reactor pressure vessel by an internal pump disposed therein is measured by a device which comprises a flow passage resisting device located in the recirculating flow passage of the primary coolant for creating between the upstream and downstream sides thereof a pressure difference in the primary coolant flow and detectors disposed at the upstream and downstream sides of the flow passage resisting device to detect the pressure difference therebetween. The thus detected pressure difference is converted into a corresponding electric signal by a transmitter which then transmits the signal to a device for computing the recirculating flow rate of the primary coolant in response to the signal. The device may further comprise an auxiliary measuring device for measuring a core flow rate of the primary coolant in a manner similar to that in the pumping flow rate measurement described above.

REFERENCES:
patent: 3071160 (1963-01-01), Weichrod
patent: 3838598 (1974-10-01), Tompkins
patent: 3840051 (1974-10-01), Akashi et al.
patent: 4315800 (1982-02-01), Yoshimoto et al.
patent: 4422340 (1983-12-01), Kolodzey et al.
patent: 4662219 (1987-05-01), Nguyen

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