Modeling of Gas Mixed Saturated Steam Water Spaces Using Coupled Single Equation Method

Jacob K Philip (Nuclear Power Corporation of India Limited & VJTI - Mumbai University, India)

Saturated Steam Water Spaces based equipment are employed in thermal and nuclear power plants. Single Equation Method based approach significantly improved the modelling of Saturated Steam Water Spaces, as it uses a mixed-phase analysis instead of conventional two phase multiple equation approach. The combined properties based single equation method, the Mass Factor-Volume Factor approach, further simplified the Single Equation methods and made modelling of Saturated Steam Water Spaces more efficient and computation friendly. When air or non-condensable gases are mixed into a saturated steam water space, the single equation method cannot be applied directly. Modelling of these spaces becomes relevant as most steam and water spaces contains small amount of non-condensable gases. These models are employed in the analysis of nuclear power plant containment, as steam or water at high temperatures leak into these spaces especially during accidents. A coupled steam water vapour space is proposed in this paper with the air space and the steam space coupled together as one model, still maintaining the single equation characteristics. The model was simulated using the combined properties approach and the simulation results are also discussed.

Journal: International Journal of Simulation- Systems, Science and Technology- IJSSST V22

Published: no date/time given

DOI: 10.5013/IJSSST.a.22.01.15