IAEA Technical Meeting on IFMIF, Karlsruhe, 4-6 October 2005

1. Forschungszentrum Karlsruhe in der Helmholtz-Gemeinschaft IAEA Technical Meeting on IFMIF, Karlsruhe, 4-6 October 2005 S.P. Simakov, U.Fischer, V. Heinzel Association FZK-Euratom, Forschungszentrum Karlsruhe F. Wasastjerna a) , P.P.H. Wilson b) a) Association Euroatom-Tekes, Helsinki, Finland b)Fusion Technology Institute,University of Wisconsin, Madison, USA IFMIF neutronics and activation analyses: Li target, High Flux Test Module and Test Cell

2. Computational Tools and Nuclear Data Base • IFMIF neutron source simulation, neutron transport and nuclear responses calculations: • McDeLicious code - for the neutron source simulation (using d-Li evaluated cross sections, updated by P.Pereslavtsev) and neutron transport • neutron cross sections from INPE/FZK-50, LA-150 general libraries – for transport and nuclear responses • Radioactive inventory calculations: • deuteron induced inventories in the Li loop - by McDeLicious code using evaluated Li(d,x)3H and Li(d,x)7Be cross sections files • neutron induced inventories in the IFMIF components by ALARA inventory code with IEAF-2001 activation data library (up to 150 MeV) • IFMIF test cell model (F.Wasastjerna): • detailed 3d geometry model describing all principal sub systems of the IFMIF test cell (d-beam tubes, Li-loop and target, test modules, test cell walls) IAEA Technical Meeting on IFMIF, Karlsruhe, 4-6 October 2005

3. D-Li Neutron yields: Validation vs. thick target experiment Experiment set-up with pin d-beam and point n-detector: Neutron Spectra at well defined angles: n-detector DQ = 1o Li-target d-beam Peak at energy 15 MeV is clearly visible in well fine angle geometry. This peak is reproduced by 2005 updated d-Li evaluation within 10% IAEA Technical Meeting on IFMIF, Karlsruhe, 4-6 October 2005

4. Does IFMIF neutron spectra have 14 MeV peak ? Neutron Spectra at Atom point IFMIF fragment: CFTM-rods HFTM-rigs Li-jet d-beam DQ = +/-10o Angular smearing and multiple scattering smooth a 14 MeV neutron peak in HFTM, resulting to the shape without local extremes IAEA Technical Meeting on IFMIF, Karlsruhe, 4-6 October 2005

5. Transport cross sections and nuclear responses Evaluated neutron cross sections(LANL – solid, INPE/FZK – dash) Responses in HFTM/IFMIF vs. Libraries(uncertainties due to XS data) Expected uncertainties of IFMIF nuclear responses due to the transport cross sections data - (5- 15)% IAEA Technical Meeting on IFMIF, Karlsruhe, 4-6 October 2005

6. 3-dimensional nuclear responses in HFTM (40MeV@250mA) HFTM Matrix & Nuclear Responses(averaged over the rig volume) HFTM equatorial plane view IAEA Technical Meeting on IFMIF, Karlsruhe, 4-6 October 2005

7. Li Li inject inject tank tank Front wall Liner Front wall Liner Front wall Liner TRM TRM TRM Li Li Li - - - jet jet jet LFTM LFTM LFTM d d - - beam beam C C C HFTM HFTM HFTM W W W UTM UTM UTM BP Li Li quench quench tank tank Nuclear Responses in the IFMIF sub-systems Neutron energy fluxes in the IFMIF Test Cell global model Neutron fluxes & dpa in the IFMIF components IAEA Technical Meeting on IFMIF, Karlsruhe, 4-6 October 2005

8. Induced Radioactivity in the IFMIF sub-systems IFMIF Test Cell γ- Dose vs. Cooling Time after 1 year run Induced activity is assessed for every IFMIF Test Cell component IAEA Technical Meeting on IFMIF, Karlsruhe, 4-6 October 2005

9. Activation analyses of Eurofer and SS-316 steels (long term irradiation in the IFMIF components) Eurofer & SS-316 composition γ- dose of steels after 10 years irradiation in Universal Test Machine (UTM) frame Reduced contents of Al, Ni and Mo in Eurofer steel result in lower activation in comparison with SS-316 IAEA Technical Meeting on IFMIF, Karlsruhe, 4-6 October 2005

10. Transmutation analyses of Eurofer (HFTM/IFMIF vs. FW/DEMO) Elemental transmutation may reach 30% per fpy IAEA Technical Meeting on IFMIF, Karlsruhe, 4-6 October 2005

11. d-Li radioactive inventory (3H and 7Be) cross sections and thick target yields Li(d,x)3H and 7Be cross sections 3H and 7Be yields in thick Li target IAEA Technical Meeting on IFMIF, Karlsruhe, 4-6 October 2005

12. Li Li inject inject tank tank Front wall Liner Front wall Liner Front wall Liner TRM TRM TRM Li Li Li - - - jet jet jet LFTM LFTM LFTM d d - - beam beam C C C HFTM HFTM HFTM W W W UTM UTM UTM Li Li quench quench tank tank Tritium and Be-7 Inventories in the IFMIF Li Loop Geometry model of Test Cell & Li -loop 3H and 7Be production rates in Li-loop sub-systems IAEA Technical Meeting on IFMIF, Karlsruhe, 4-6 October 2005

13. d-Li gamma-ray source and IFMIF “photonics” γ-ray spectrum in HFTM IFMIF: neutronics vs. photonics IAEA Technical Meeting on IFMIF, Karlsruhe, 4-6 October 2005

14. Updated d-Li evaluated cross sections were validated for neutrons, tritium and beryllium-7 yields (uncertainties at the level of 10% are expected) No experimental data exist for g-ray yields Detailed 3-d geometry model of the IFMIF test cell has been implemented in the Monte Carlo neutronics calculations Nuclear responses (dpa, heat and gas production) have been calculated for principal IFMIF sub-systems. 3H and 7Be radioactive inventories have been assessed for the whole Li-loop Activation and transmutation analyses has been performed for the IFMIF test cell and main structural materials Summary IAEA Technical Meeting on IFMIF, Karlsruhe, 4-6 October 2005