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Analys av nivåproblematik i dränagetank på Ringhals 1
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
2012 (Swedish)Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesisAlternative title
Analysis of high level in the drainage tank on Ringhals 1 (English)
Abstract [en]

The focus of this project has been on the drainage tank of the reheater on Ringhals 1. This tank has on two previous occasions received such a high water level that the system automatically emergency stopped. For this reason, events and various readings from these two occasions has been specifically studied and analyzed. In order to prove theories about what causes these problems a model of the system was created in the program Dymola. Using simulation results from the model, we have been able to demonstrate how the system's measured values should look likeunder normal conditions with respect to flows, pressures, temperatures, valve positions and water level in the drainage tank. The project has provided a basis for the parameters that should be investigated further and to facilitate this we have given suggestions on some new measure points in the system. Analysis results also gave a clearer picture of how the high levels in the tank have emerged. The previous theory that the high levels occurred due to vaporization in the tank has more or less been disproved. Analyses of the measurements indicate that the high level is not only caused by steam, but to an unusually large amount of water in the tank at the high-profile occasions.

Place, publisher, year, edition, pages
2012. , 38 p.
Keyword [sv]
kärnkraft
National Category
Other Engineering and Technologies not elsewhere specified
Identifiers
URN: urn:nbn:se:uu:diva-195311ISRN: UTH-INGUTB-EX-KKI-2012/06-SEOAI: oai:DiVA.org:uu-195311DiVA: diva2:607471
Educational program
Bachelor Programme in Nuclear Engineering
Uppsok
Technology
Supervisors
Examiners
Available from: 2013-03-05 Created: 2013-02-23 Last updated: 2013-03-05Bibliographically approved

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