Definition of a dynamic source term module within RASTEP

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dc.contributor.authorDi Dedda, Francesco
dc.contributor.departmentChalmers tekniska högskola / Institutionen för teknisk fysiksv
dc.contributor.departmentChalmers University of Technology / Department of Applied Physicsen
dc.date.accessioned2019-07-03T13:08:07Z
dc.date.available2019-07-03T13:08:07Z
dc.date.issued2013
dc.description.abstractRASTEP (RApid Source TErm Prediction) is a computerized tool developed by Scandpower AB for use in the fast online diagnosis of accidents at nuclear power plants. The tool is based on a Bayesian Belief Network (BBN) that is used to determine the most likely plant state, which is associated with pre-calculated source terms. In its current design, the source term predictions are not flexible enough. A previous study evaluated different methods for enhancing the source term module of RASTEP. This thesis work follows that approach and explores the integration of a fast running deterministic code within RASTEP in order to make the predictions more realistic. The MARS software, developed by Fauske & Associates, has been chosen as best candidate for this purpose. Literature studies, along with interviews with experts, and conceptual reasoning have been carried out in order to identify the best linking process. Two modes for coupling the BBN with the deterministic code MARS (integrated and iterative) have been proposed and evaluated. In both approaches, the strength of the probabilistic predictions is kept and the capabilities of MARS are proven also in a linked configuration. It is concluded from the study that this method can be used to enhance RASTEP and it is feasible for implementation in the short term.
dc.identifier.urihttps://hdl.handle.net/20.500.12380/174710
dc.language.isoeng
dc.relation.ispartofseriesCTH-NT - Chalmers University of Technology, Nuclear Engineering : 270
dc.setspec.uppsokPhysicsChemistryMaths
dc.subjectEnergi
dc.subjectAnnan fysik
dc.subjectÖvrig teknisk fysik
dc.subjectEnergy
dc.subjectOther Physics Topics
dc.subjectOther engineering physics
dc.titleDefinition of a dynamic source term module within RASTEP
dc.type.degreeExamensarbete för masterexamensv
dc.type.degreeMaster Thesisen
dc.type.uppsokH
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