Simulation modeling of nuclear steam generator water level process - a case study

Simulation modeling of the nuclear steam generator (SG) water level process in Qinshan Nuclear Power Plant (QNPP) is described in this paper. A practi cal methodology was adopted so that the model is both simple and accurate f or control engineering implementation. The structure of the model is in the form of a transfer function, which was determined based on first-principle s analysis and expert experience. The parameters of the model were obtained by taking advantage of the recorded historical response curves under the e xisting closed-loop control system. The results of process dimensional data verification and experimental tests demonstrate that the simulation model depicts the main dynamic characteristics of the SG water level process and is in accordance with the field recorded response curves. The model has bee n successfully applied to the design and test of an advanced digital feedwa ter control system in QNPP. (C) 2000 Elsevier Science Ltd. All rights reser ved.