Weighted temperature measurement using multiple sensors

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376247, G06G 712

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active

052531902

ABSTRACT:
Three fast response resistance temperature sensors (A, B, C) are spaced 120 degrees apart on a circular plane normal to fluid flow in the hotleg (14) from a nuclear reactor (10). Each sensor produces a temperature signal and is assigned a weighting factor, between zero and one hundred percent, in inverse proportion to the relative magnitude of the temperature fluctuation. The sensor with the smallest signal fluctuation receives the highest weighting factor. The sum of the factors equals one hundred percent. The temperature associated with a sensor (A, B, C) is multiplied by the sensor's respective weighting factor, to produce a second temperature. The actual temperature for the hotleg (14) is the sum of the second temperatures.

REFERENCES:
patent: 3998693 (1976-12-01), Musick
patent: 4926364 (1990-05-01), Brotherton
patent: 5024802 (1991-06-01), Srinivasan
Monitoring Temperature Reactivity Coefficient by Noise Method in a NPP at Full Power by O. Aguilar, Ann. Nuclear Energy, vol. 14, No. 10, pp. 521-526, 1987.
Temperature Measurement in Nuclear Reactors by Noise Thermometry by Brixy.
Nuclear Instruments and Methods 97(1971)75-80.
An In-Reactor Temperature Monitor by Hofman, Nuclear Technology, vol. 19, Sep. 1973, pp. (204-206).

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