Control Rod Effect at Partial SCRAM: Upgrade of Plant Model for Forsmark 2 in BISON After Power Uprate
Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
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
nuclear power, bwr, boiling water reactor, BISON, POLCA, partial SCRAM modeling, control rod effect, transients
Energy Systems Energy Engineering Computational Mathematics
IdentifiersURN: urn:nbn:se:uu:diva-269360OAI: oai:DiVA.org:uu-269360DiVA: diva2:882861
Forsmark Kraftgrupp AB
Master Programme in Engineering Physics
Aspman, AnnaPalko, David
Nyberg, Tomas, ForskareQvist, Staffan, Forskare