Abstract
A lumped parameter type code, called HEPCAL, has been worked out in the
Institute of Thermal Technology of the Silesian University of Technology
for simulations of a pressurized water reactor containment transient
response to a loss-of-coolant accident. The HEPCAL code has been already
verified and validated against available experimental data, which in fact
have been taken from separate effect tests mainly. This work is devoted to
validation of the latest version of the HEPCAL code against experimental
data from more complex tests. These experiments have been performed on
three different test rigs (called TOSQAN,MISTRA and ThAI) and a part of
them became the basis of the International Standard Problem No. 47
(ISP-47) dedicated to containment thermal-hydraulics. Selected experiments
realized within the framework of the ISP-47 project have been simulated
using the HEPCAL-AD code. The obtained results allowed for drawing of some
important conclusions concerning heat and mass transfer models (especially
steam condensation), two-phase flow model and buoyancy effects.
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