Создание экспериментальной базы и методики системной оценки влияния изменения пространственной ориентации на теплогидравлические процессы

Abstract

This paper discusses thermohydraulic processes in marine nuclear reactor in order to develop test models and testing methods for assessment of unsteady thermohydraulic processes in the hydraulic circuit of nuclear reactor taking into account external dynamic factors typical for marine environments, like motions and heel. This work was an experimental study on non-isothermal mixing in one and two motion planes, and mostly followed experimental methods (thermal probing), as well as the methods of visualization and system analysis. Non-isothermal mixing of flows in the channel of marine nuclear power plant was investigated for both static conditions and dynamic environment (uni- and bi-planar motions), which yielded a generalized model of motion effects upon thermohydraulic processes. Visualization methods served to identify hot/cold areas. The study also highlighted how spatial orientation of the reactor’s flow channel changes thermal parameters exactly at the boundary of thermal front. It is shown that flow channel of marine nuclear power plant is a complex unsteady system. Motion tests are practicable to perform varying not only the amplitude (angle) of motions, but also their period, as well as to discriminate between high- and low-frequency motions and investigate joint effect of different motion types that have to be simulated and analysed in its own way.