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FRAPCON/FRAPTRAN activity at VTT

FRAPCON/FRAPTRAN activity at VTT. FRAPCON users group meeting V. Tulkki, A. Arffman VTT Technical Research Centre of Finland. Code use at VTT. Past activity Current and near-future projects. Recent Projects.

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FRAPCON/FRAPTRAN activity at VTT

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  1. FRAPCON/FRAPTRAN activity at VTT FRAPCON users group meetingV. Tulkki, A. ArffmanVTT Technical Research Centre of Finland

  2. Code use at VTT • Past activity • Current and near-future projects

  3. RecentProjects • Simulation of past Halden LOCA testsin cooperation with Quantum Technology (Sweden) [1] • VTT uses FRAPTRAN-GENFLO for referencecalculation and TH boundaryconditions for QT’smodified FRAPTRAN calculations • Ongoing for IFA-650.5-> • Simulation of Halden VVER LOCA test IFA-650.11 • Rupturelocation and timewellreplicated, however • Difficulty to replicatetemperatureevolutionafter the rupture (similareffect in someother LOCA teststoo) • [1] Tero Manngård, Ali Massih, Jan-Olof Stengård, Evaluation of the Halden IFA-650 loss-of-coolant accident experiments 2, 3 and 4, http://dspace.mah.se/handle/2043/13443

  4. RecentProjects • Statistical full-core LOCA evaluation • Presentedin TopFue l2011 [2] • Upgrading of FRAPTRAN-GENFLO TH coupling for boundaryconditionsallowing for totalchannelemptyingand downwardsflow • LOCA conditions in largereactorsquiteharsh • FRAPCON used in SCANAIR initialization [3] • Initializationmoduleby IRSN • Interpretation of gapduring RIA [2] 2011 Water Reactor Fuel Performance Meeting, paperT3-028 [3] A. Arffman, A. Moal, Georgentum, V, Evaluation and Adaptation of the RIA code SCANAIR for modelling BWR fuel and conditions, TopFuel 2012

  5. Currentsituation and futureissues • Tradition of keepingourownmodified version • Major modificationspresented in usersgroupmeetingadjanced to Topfuel 2010 • Our person responsible for FRAPTRAN and FRAPCON maintenance is about to retire • Knowledge transferongoing • LOCA damagedrodestimation for EPR still a currentissue • <10% rodsdamaged in LBLOCA • Participation in OECD uncertaintyanalysis in bestestimatemodelling (UAM) workshop with both FRAPCON and ENIGMA codes • Enhancingourcapability for uncertaintyestimations

  6. VTT - 70 years oftechnology for business and society

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