1. ITER Computational Shield Benchmark IAEA TM on Nuclear Data Library for Advanced Systems – Fusion Devices. Vienna, October 31 – November 2, 2007 U. Fischer, A. Serikov Association FZK-Euratom Forschungszentrum Karlsruhe EFF-DOC-975 Forschungszentrum Karlsruhe in der Helmholtz-Gemeinschaft

2. U. Fischer, A. Serikov, ITER computational shield benchmark - IAEA TM, Vienna, October 31- November 2, 2007 Background FENDL-2.1 –Revision to FENDL-2.0 (1995/96) –Compiled November 2003, see report INDC(NDS)-451 –Working libraries prepared by IAEA/NDS, see INDC(NDS)-467 (2004) –New reference data library for ITER neutronics calculations –ITER nuclear analyses service – enabling activities (CAD – MCNP benchmark) –QA specification document for ITER neutronic analyses Need for –Qualification  benchmark analyses –Validation  fusion benchmark experiments Start with computational benchmark typical for ITER applications

3. U. Fischer, A. Serikov, ITER computational shield benchmark - IAEA TM, Vienna, October 31- November 2, 2007 ITER Computational Shield Benchmark ITER 1D blanket/shield/VV/TF-coil configuration –Set up as part of the FENDL-1 benchmarking efforts Reference: M. Sawan, FENDL Neutronics Benchmark: Specifications for the calculational and shielding benchmark, INDC(NDS)-316, December 1994 –Applied for benchmarking of FENDL-1.0 multigroup data against ENDF/B-V data using ONEDANT discrete ordinates code Reference: M. Sawan, Results of the neutronics and shielding calculational benchmark, IAEA Advisory Group Meeting on Completion of FENDL-1, Del Mar, CA, December 5-9, 1995 –Suitable computational benchmark for ITER neutronics calculations Benchmarking of FENDL-2.1 vs. FENDL-2.0 and –1.0 (MC data) –No benchmark results available for FENDL-1.0/2.0 MC data –Need to re-run benchmark for those data too!

4. U. Fischer, A. Serikov, ITER computational shield benchmark - IAEA TM, Vienna, October 31- November 2, 2007 FENDL Data Evaluations

5. U. Fischer, A. Serikov, ITER computational shield benchmark - IAEA TM, Vienna, October 31- November 2, 2007 FENDL-2.1 Original Data Sources

6. U. Fischer, A. Serikov, ITER computational shield benchmark - IAEA TM, Vienna, October 31- November 2, 2007 ITER Computational Shield Benchmark Horizontal cross-section Vertical cross-section

7. U. Fischer, A. Serikov, ITER computational shield benchmark - IAEA TM, Vienna, October 31- November 2, 2007 ITER Computational Shield Benchmark Inboard radial build

8. U. Fischer, A. Serikov, ITER computational shield benchmark - IAEA TM, Vienna, October 31- November 2, 2007 Total neutron fluxes

9. U. Fischer, A. Serikov, ITER computational shield benchmark - IAEA TM, Vienna, October 31- November 2, 2007 Total neutron flux profile (FENDL-2.1)

10. U. Fischer, A. Serikov, ITER computational shield benchmark - IAEA TM, Vienna, October 31- November 2, 2007 Total neutron flux profiles: FENDL-2.1 vs. 2.0 Relative difference (F2.1 – F2.0)/F2.1  100

11. U. Fischer, A. Serikov, ITER computational shield benchmark - IAEA TM, Vienna, October 31- November 2, 2007 Neutron flux spectra: FENDL-2.1 vs. 2.0 Relative difference (F2.1 – F2.0)/F2.1

12. U. Fischer, A. Serikov, ITER computational shield benchmark - IAEA TM, Vienna, October 31- November 2, 2007 Total photon flux profiles: FENDL-2.1 vs. 2.0 Relative difference (F2.1 – F2.0)/F2.1

13. U. Fischer, A. Serikov, ITER computational shield benchmark - IAEA TM, Vienna, October 31- November 2, 2007 Outboard nuclear heating profile: FENDL-2.1 vs. 2.0 Relative difference (F2.1 – F2.0)/F2.1

14. U. Fischer, A. Serikov, ITER computational shield benchmark - IAEA TM, Vienna, October 31- November 2, 2007 Helium production in SS-316 (FENDL-2.1) Total and elemental decomposition Ni

15. U. Fischer, A. Serikov, ITER computational shield benchmark - IAEA TM, Vienna, October 31- November 2, 2007 Helium production in SS-316: FENDL-2.1 vs. 2.0 Relative differences (F2.1 – F2.0)/F2.1 Ni

16. U. Fischer, A. Serikov, ITER computational shield benchmark - IAEA TM, Vienna, October 31- November 2, 2007 Helium production cross-sections of Fe FENDL-2.0 vs. 2.1 FENDL-2.0 FENDL-2.1

17. U. Fischer, A. Serikov, ITER computational shield benchmark - IAEA TM, Vienna, October 31- November 2, 2007 Hydrogen production in SS-316: FENDL-2.0 vs. 2.1 Relative differences (F2.1 – F2.0)/F2.1

18. U. Fischer, A. Serikov, ITER computational shield benchmark - IAEA TM, Vienna, October 31- November 2, 2007 Hydrogen production cross-sections of Fe FENDL-2.1 vs. 2.0 FENDL-2.1 FENDL-2.0 (total)

19. U. Fischer, A. Serikov, ITER computational shield benchmark - IAEA TM, Vienna, October 31- November 2, 2007 Hydrogen production cross-sections of Fe FENDL-2.0: total vs. partials total (n,p) (n,n’p)

20. U. Fischer, A. Serikov, ITER computational shield benchmark - IAEA TM, Vienna, October 31- November 2, 2007 Conclusions FENDL-2.1 vs. 2.0 –No significant differences of calculated neutron fluxes except for region of TF coil (deep penetration) where FENDL-2.1 results are 10-12 % higher. –Similar trend is observed for photon fluxes and nuclear heating. –Significant discrepancies found for He and H production data FENDL-2.0 total gas production cross-sections not reliable, use partials FENDL-2.1 total gas production cross-sections consistent with partials Differences in He production data severe, indication of deficient cross- sections in FENDL-2.0 Differences in hydrogen production correspond to differences in neutron fluxes (using partial production cross-sections) Experimental validation of gas production data required !