A method is developed for performing statistical analysis of the uncertainty of the thermophysical calculations. This method makes it possible to construct with a prescribed reliability the confidence interval for the estimated parameter, determine the factors which have a large effect on the computational result, and estimate how close the variant calculations are to the base (undeviated) calculation. The methodology has been approved, within the framework of a deeper substantiation of the safety of the No. 1 unit of the Kursk nuclear power plant, for analysis of two types of accidents, using the RELAP5/MOD3.2 computer code, with rupture of the group distribution collector.

The article presents a numerical study of vapor condensation appearing in an ejector. The ejector is a part of a device developed by the authors and used to purify air emissions. The article considers condensation of pure water vapor and condensation of vapor in a mixture of vapor and carrier gas. The system of axisymmetric Navier-Stokes equations and the system of moment equations are considered as a mathematical model for describing two-dimensional non-stationary gas-dynamic processes and processes of phase transitions in the device. The general system of equations is numerically solved using the finite volume method.

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