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Control Rod Effect at Partial SCRAM: Upgrade of Plant Model for Forsmark 2 in BISON After Power Uprate
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
2015 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

This study aims to improve the modeling of partial SCRAM in the BISON plant model for the Forsmark 2 nuclear reactor after power uprate. Validation of the BISON model against tests performed from March to May in 2013 have shown that this is one of the areas in which there is room for improvement. After partial SCRAM is performed, the model underestimates the reactor power, recirculation flow and steam flow when compared to the measurement data.

In BISON the partial SCRAM is modeled using a relative control rod effect vector (ASC vector). The aim is to replace the old values in this vector to improve the model. The new model was shown to give an improved result for the reactor power, recirculation flow and steam flow. The study gives recommendations on how to apply the new model and what values of the relative control rod effect vector that can be used in the future.

Place, publisher, year, edition, pages
UPTEC F, ISSN 1401-5757 ; 15069
Keyword [en]
nuclear power, bwr, boiling water reactor, BISON, POLCA, partial SCRAM modeling, control rod effect, transients
National Category
Energy Systems Energy Engineering Computational Mathematics
URN: urn:nbn:se:uu:diva-269360OAI: diva2:882861
External cooperation
Forsmark Kraftgrupp AB
Educational program
Master Programme in Engineering Physics
Available from: 2015-12-18 Created: 2015-12-15 Last updated: 2015-12-18Bibliographically approved

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Applied Nuclear Physics
Energy SystemsEnergy EngineeringComputational Mathematics

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