Nuclear coupled Thermal Hydraulics in Supercritical channels under fast pressure loss

What is it about?

Using a nuclear point kinetics coupled thermal hydraulic model we have modeled some experimental tests in order to validate and further predict the behavior of supercritical water flowing in vertical channels of circular cross section. The phenomenon of deterioration in heat transfer as a result of fast pressure loss inside the channel is modeled and the possible failure of such a system is analyzed.

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Why is it important?

One of the key fixtures of this work is the modeling and prediction of supercritical pressure channels under fast depressurization as a function of different mass flow rates. Specifically significant are the test cases demonstrating the behavior of this system under heavy mass flow rates which are found to be good agreement with the experimental results.