1 / 6

Recent FRAPCON and FRAPTRAN activity at VTT

Recent FRAPCON and FRAPTRAN activity at VTT. Users group meeting V. Tulkki VTT Technical Research Centre of Finland. Recent FRAPCON & FRAPTRAN use at VTT. Statistical studies OECD/NEA benchmark on uncertainty analysis of best estimate modelling of light water reactors Support to STUK

rina-guthrie
Download Presentation

Recent FRAPCON and FRAPTRAN activity at VTT

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. RecentFRAPCON and FRAPTRANactivity at VTT Users group meetingV. TulkkiVTT Technical Research Centre of Finland

  2. Recent FRAPCON & FRAPTRAN use at VTT • Statistical studies • OECD/NEA benchmark on uncertainty analysis of best estimate modelling of light water reactors • Support to STUK • EPR LBLOCA • Halden LOCA experiment simulations • FRAPTRAN-GENFLO bundle simulations

  3. Statistical studies • FRAPCON used for a statisticalstudy on input interactions • Sobol’ variancedecompositionused in analysis • Providesinformation on higherorderinteractions • Downside: ~106 FRAPCON runs • Traditionalfirst-order ranking methodscommonlyused in sensitivityanalysisnotalwayssufficientdue to complexinteractions • Discussed in OECD/NEA UAM workshops and Halden uncertainty workshop thisfall • ”The importance of input interactions in the uncertainty and sensitivityanalysis of the nuclearfuelbehavior”, T. Ikonen and V. Tulkki, submitted to Nuclear Engineering and Design • Workcontinues with FRAPTRAN analysis

  4. LBLOCA • Comparativeanalysis for STUK on number of failedrodsduring EPR LBLOCA • Regulatoryrequirement <10% • For reference / information to STUK, notpart of officialprocess • System code APROS used for 59 globalsimulations of plantstate • 59x1000 FRAPTRAN/GENFLO subchannelanalysisused with localvariations • Resultsextended to wholecore with neuralnetworks • -> fraction of failedrods • Work in progress

  5. Study on impact of variation of heatingpower for future Halden LOCA test • Also, simulation of the effect of spacergridsimulation • Shouldbeimplementable in the FEA model • Extension of FRAPTRAN/GENFLO hotchannelmode to bundlemodel with severalconcurrent FRAPTRAN simulations • Coupling of FRAPCON to Serpent 2 MC reactorphysicscode via universalmultiphysicsinterface • Use of FRAPTRAN for benchmarkingour FINIX fuelmodule • FINIX initializationfrom FRAPCON restart • FRAPTRAN to beused in IAEA CRP FUMAC and possibly OECD RIA phase II benchmark

  6. VTT creates business from technology

More Related