Boccaccini, L.V.

Franza, F.

Maione, I.A.

Pomella Lobo, T.

English

Maione, I. A.

Boccaccini, L. V.

KITopen

KIT – The Research University in the Helmholtz Association www.kit.eduA Time-Dependent Fuel Cycle developed forMulti-Timescale Systems-Codes to study technology integration in advanced Fusion Power PlantsT. Pomella Lobo1*, F. Franza1, I. A. Maione1, L. V. Boccaccini11 Institute for Neutron Physics and Reactor Technology (INR), Karlsruhe Institute of Technology (KIT), Karlsruhe, GermanyAbstractSystems-Codes (SCs) are fundamental tools in Fusion Energy research that allow for parameter space exploration during conceptual design phases of power plants. They may also be used to discover relevant dependencies throughparametric studies, which are especially important to evaluate technology integration in reactors. However, current state-of-the-art SCs do not to address this concern on a power plant level, in part due to the inherent difference intimescale in which each plant system predominantly operates. Thus, a novel Multi-Timescale SC approach is currently under study.This work introduces the new methodology adopted, being developed at the Karlsruhe Institute of Technology (KIT). As example, it shows the implementation of a power plant’s Fuel Cycle (FC) in the form of a new SC module,considered essential to explore fuel scenarios in the power plant’s lifetime timescale. Future coupling of this module to a SC will allow one to study system inter-dependencies that affect the fuel balance at this timescale. The simulatorwas designed using Simulink®, with a library of generic FC components developed using a Residence-Times mathematical model. This aimed at reducing the module’s required computational power, to comply with SCs requirements. Themodule was verified by building and running a Demonstration Powerplant (DEMO) FC model and comparing the results with other studies in literature. The model was deemed versatile and sufficiently quick for future application in a SCframework.Keywords: DEMO, Fuel Cycle, Systems-Codes, Nuclear Fusion TechnologyDEMO Fuel Cycle Simulink time-dependent model (TD)STORAGEMISPMSCFS HCPBREACTORTESTORHBSHPSHCSDIRMFSVPSVRSINNEREPSPRSIRSOUTERCPSGDSISSSTKT2 Results (scenarios simulated with TD model)Conclusions & OutlookVideoconference (PIN: 0000)https://conf.dfn.de/webapp/conference/979154332q Develop time-dependent Fuel Cycle simulator for the MIRA Systems-Code.q Coupling of simulator with other MIRA modules allows for technology integration studies.q Current coupling:• Torus Exhaust module (to compute dwell-time, based on Battes-2015).Objectiveq Pulsed scenarios in TD result in lower inventories than in SS, due to ratios between the pulse length and residence-times.q Thus, SS simulations output conservative inventory estimates in comparison to TD.q Future simulations foresee more complex pulsed scenarios with:• addition of maintenance periods;• HCPB-Coolant flow variation during pulse; …q Simulates inventories dynamics for: T2, D2, H2, He3, He4, N2, Xe, Ar.q Generic components with simplified approach: Residence-Times model.q Residence-Times (τ) computed by a pre-run Steady-State model (SS), that only models flat-top and whose outputs were verified against literature.*Contact: t.pomella-lobo@kit.eduFC Section SystemTD response(g or g/year)SS response(g or g/year)Deviation (%)(SS-TD)/TDStorageMIS Matter Injection 5593.1 5616.5 0.4PMS Purge Make-up 0 0 -CFS Coolant Filling 0 0 -ReactorTOR Torus 0.51 0.51 -2.38 x 10-3HBS HCPB Breeding 24.96 25.85 3.56HPS HCPB Purging 0.13 0.14 4.35HCS HCPB Cooling 1.00 x 10-2 1.01 x 10-2 5.66TES Tritium Extraction 450.24 484.06 7.51DIRMFS Metal Foil 15.04 15.04 -1.96 x 10-4VPS Vacuum Permeate 9.05 9.05 -4.40 x 10-4VRS Vacuum Retentate 4.76 4.76 -5.65 x 10-4InnerEPS Exhaust Processing 20.00 20.00 -5.26 x 10-3PRS Protium Removal 158.55 165.05 4.10IRS Isotope Rebalancing 145.81 152.67 4.70OuterCPS Coolant Purification 9.20 9.91 7.68GDS General Detritiation 730.02 790.19 8.24ISS Isotope Separation 771.77 833.33 7.98STK Stack 7.2 8.5 19.1(1) steady-state: retrieves SS model inventories within 1% deviation (not displayed)(2) pulsed, dwell-time computed by Exhaust module, no maintenance:pulse length < τHBS⇒InvTD < InvSS

A Time-Dependent Fuel Cycle developed for Multi-Timescale Systems Codes to study technology integration in advanced Fusion Power Plants

https://publikationen.bibliothek.kit.edu/1000124688/89938490

A Time-Dependent Fuel Cycle developed for Multi-Timescale Systems Codes to study technology integration in advanced Fusion Power Plants

Abstract

Similar works

Full text

Available Versions

KITopen