Experimental modeling of transient thermohydraulic processes in a power plant

Having half a century of experience in the design and operation of marine nuclear power plants, when designing new installations, the struggle is for increased resource characteristics of equipment and, in particular, the resource of the reactor core. To achieve the desired result, a deep analysis of all physical and chemical processes occurring in the main equipment of the reactor plant is carried out. An important role in this work is played by the study of transient thermohydraulic processes. Such processes are inertial and introduce oscillatory perturbations of the first order of smallness into the system. It is also important to investigate systems for dynamic stability. This aspect of the study is important not only for ship installations with their inherent maneuverability, but also for large-scale power units. Analysis and research of mathematical models is a difficult process, because even for the simplest two-circuit installation, such a model will consist of several nonlinear differential equations. In this case, it is advisable to use either numerical methods or simplified mathematical models. To study the transient thermal-hydraulic processes in this work, an experimental stand FT-100 was used, which is a model of a two-circuit installation. Several nominal operation modes were implemented. The results obtained are checked for agreement with the simplest mathematical model, and can serve as a starting point for further calculation of the installation parameters. Also, the value of the obtained data array lies in the possibility of verifying the calculated codes of dynamics and automatic control systems. These codes are a valuable tool in design, and obtaining new experimental data helps to increase the accuracy of the calculation.

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