Nuclear reactor primary coolant loop flowmeter with phase shift

Details Nuclear reactor primary coolant loop flowmeter with phase shift Nuclear reactor primary coolant loop flowmeter with phase shift

1978-09-28

1980-11-04

Willis, Davis L.

Radiant energy

Invisible radiant energy responsive electric signalling

Flow metering

250435, G01F 100

Patent

active

042322243

ABSTRACT:
An improved nuclear reactor primary loop flowmeter having two spaced N-16 detectors (12 and 14) positioned along the primary loop piping for monitoring the N-16 activity within the coolant at the respective detector locations. The outputs of the two detectors are cross-correlated to determine the transit time of corresponding N-16 perturbations viewed at the two detector locations. The improvement comprises means for switching (34 and 36) the respective detector output electronic processing channels (18 and 20) between detectors (12 and 14) and measuring the maximum cross-correlation function (30 and 32) with the detector output channels in their original and switched positions to determine the true coolant transit time between detector locations and any phase shift induced by the detector output channels.

REFERENCES:
patent: Re28686 (1976-01-01), Coulthard
patent: 3818231 (1974-06-01), Gopal et al.

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