Development of Virtual Measurement technology of secondary sodium flow rate

The 'Virtual Measurement' method, utilizing neural networks that are trained with plant data enables the indirect estimation of objective physical quantities even when plant signal are incomplete and/or when anomalous states of the plant are encountered. This study applied the technique of virtual measurements to estimate sodium flow rate in the secondary heat transport system and proposed a framework for the isolation of erroneous estimates caused by faulty components. As result, it was demonstrated that, with the use of the virtual measurement method, credible measurements of objective physical quantities could be obtained even if under conditions where comprehensive information is lacking. (author)