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The Determination of Time Constants of Reactor Pressure and Temperature Sensors: The Dynamic Data System Method

S. M. Wu, M. C. Hsu, M. C. Chow

Nuclear Science and Engineering / Volume 72 / Number 1 / Pages 84-96

October 1979

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A new modeling technique is introduced for on-line sensor time constant identification, both for the resistance temperature detector (RTD) and for the pressure sensor using power plant operational data. The sensor's time constant is estimated from a real characteristic root of the fitted autoregressive moving average model The RTD's time constant values were identified to be 8.4 s, with a standard deviation of 1.2 s. The pressure sensor time constant was identified to be 28.6 ms, with a standard deviation of 3.5 ms.

 
 
 
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