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| NKS Programme Area: | NKS-R | | Research Area: | Thermal hydraulics | | Report Number: | NKS-409 | | Report Title: | COPSAR-NKS Project; Summary report 2017 | | Activity Acronym: | COPSAR | | Authors: | Markku Puustinen, Timo Pättikangas, Pavel Kudinov, | | Abstract: | The COPSAR-NKS project has consisted of the combined effort by LUT, VTT and KTH to implement the ideas outlined in the NORTHNET Roadmap 3 document. To achieve the project objectives, a combined experimental/analytical/computational program has been carried out. LUT has been responsible for developing an experimental database on pool operation related phenomena in the PPOOLEX integral test facility and in the small-scale separate effect test facility. VTT and KTH have used the gathered experimental database for the development, improvement and validation of numerical simulation models. A small-scale separate effect test facility, SEF-POOL, has been designed and constructed at LUT based on a proposal from KTH with the aim to evaluate effective momentum for different condensation regimes. The facility allows the direct measurement of effective momentum induced by steam injection. Analysis of the preliminary steam injection tests by KTH showed that the steam momentum can be roughly predicted by the theoretical estimate and the frequencies obtained with the fast pressure transducer correlate well with the correlations proposed in the literature. Pre-test SEF-T000 performed on the SEF-POOL facility at LUT has been studied with Computational Fluid Dynamics (CFD) calculations at VTT. The simulation produced qualitatively correct description of the chugging oscillation observed in the experiment. | | Keywords: | Steam injection, Direct-contact condensation, Thermal stratification, Mixing, Pressure suppression pool, Containment, Sparger, Spray, Effective momentum, BWR, CFD, GOTHIC | | Publication date: | 27 Sept 2018 | | ISBN: | ISBN 978-87-7893-498-7 | | Number of downloads: | 1503 | | Download: |  NKS-409.pdf |
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