Modular Modeling System Validation: Transients in Fossil and Nuclear Power Plants

摘要

The Modular Modeling System (MMS), a flexible, easy-to-use system for modeling transients in steam electric power plants on a general purpose computer, has been used to model transients in the combined boiler and balance of plant of a 550 MW oil-fired power plant, in the reactor coolant system and steam generators of a pressurized water reactor (PWR) with once through steam generators, and in the same systems of a pressurized water reactor with recirculating steam generators. The models were assembled from preprogrammed modules, each representing the theoretical behavior of an identifiable component of the power plant and requiring only the addition of parameters representing its quantified characteristics and the addition of interconnection instructions to permit it to be incorporated in the model. All three models were used to simulate test transients performed on actual power plants and the results are compared with plant test data. In most cases the dynamic accuracy of the simulation was satisfactory, although in the case of several component modules some question remains as to whether discrepancies between amplitudes of transients as modeled and as measured in the plant lie in the module's predictions or in recorded plant data. The MMS proved to be easy to learn to use (two of the modelers being relatively inexperienced engineers). The cost of computation was also reasonable, varying from a few tens of dollars to a few hundred dollars per transient run, depending on the complexity of the model and the rate of change and duration of the transient. (ERA citation 08:031599)