The report presents the assumptions and the activation calculation results for all the materials (from the centre void up to the biological shield) in the equatorial plane of ITER. A discussion of the results obtained and a comparison with the former GSSR activation calculation is also in the report. The analysis refers to the case 3) (that is a combination Case 1 + 2) defined in EFDA Task TW6-TSS-SEA4.1 (EFDA Contract 07- 1702/1574, ITER reference TA-DRWG2-EU-05) and it represents the milestone 5 of the task. The calculation scheme considered is similar to the one used for ITER GSSR. The FENDL/E-2 transport library has been used for radiation transport assessment to obtain the neutron flux spectra (175-n groups) needed for the material activation calculation, that has been performed using the EASY-2005.1 code package (Fispact 2005 activation code and EAF2005.1 neutron activation library). All the input data and calculation results have been stored in a CDROM-1 that have been sent to EFDA-CSU (Dr. J. Furlan) and to ITER-Cadarache (Dr. N. Taylor). A copy of the CD-ROM-1 will stay archived, for at least 5 years, at the ENEA Fusion and Nuclear Presidium (FPN), Nuclear Fusion Technologies, Via E. Fermi 45, I- 00044, Frascati (Rome). The report presents also an analysis aiming to point out the impact on the Tungsten PL activation characteristics of the use of small mesh size at the surface of tungsten layers, to take properly into account self shielding effects. Moreover, new tungsten activation calculations have been performed, by considering the composition of the pure compact tungsten produced by Metallwerk Plansee (guaranteed analyses) that includes more impurities (and different wt.% values) with respect to those considered to obtain the calculation results contained into the CD-ROM-1. Those new tungsten calculation results will be included into a new CD-ROM-2, by February 2008. The impact of the increased fluence has been assessed by comparing the Case 3) results (1 MWa/m2) with the corresponding ones of the Case 2) calculation (0.5 MWa/m2).
G. Cambi, D.G. Cepraga (2008). ITER Material Activation Report. Case 3): Tungsten as First Wall PFC with First Wall average fluence 1.0 MWa/m2. FRASCATI (ROMA) : ENEA.
ITER Material Activation Report. Case 3): Tungsten as First Wall PFC with First Wall average fluence 1.0 MWa/m2
CAMBI, GILIO;
2008
Abstract
The report presents the assumptions and the activation calculation results for all the materials (from the centre void up to the biological shield) in the equatorial plane of ITER. A discussion of the results obtained and a comparison with the former GSSR activation calculation is also in the report. The analysis refers to the case 3) (that is a combination Case 1 + 2) defined in EFDA Task TW6-TSS-SEA4.1 (EFDA Contract 07- 1702/1574, ITER reference TA-DRWG2-EU-05) and it represents the milestone 5 of the task. The calculation scheme considered is similar to the one used for ITER GSSR. The FENDL/E-2 transport library has been used for radiation transport assessment to obtain the neutron flux spectra (175-n groups) needed for the material activation calculation, that has been performed using the EASY-2005.1 code package (Fispact 2005 activation code and EAF2005.1 neutron activation library). All the input data and calculation results have been stored in a CDROM-1 that have been sent to EFDA-CSU (Dr. J. Furlan) and to ITER-Cadarache (Dr. N. Taylor). A copy of the CD-ROM-1 will stay archived, for at least 5 years, at the ENEA Fusion and Nuclear Presidium (FPN), Nuclear Fusion Technologies, Via E. Fermi 45, I- 00044, Frascati (Rome). The report presents also an analysis aiming to point out the impact on the Tungsten PL activation characteristics of the use of small mesh size at the surface of tungsten layers, to take properly into account self shielding effects. Moreover, new tungsten activation calculations have been performed, by considering the composition of the pure compact tungsten produced by Metallwerk Plansee (guaranteed analyses) that includes more impurities (and different wt.% values) with respect to those considered to obtain the calculation results contained into the CD-ROM-1. Those new tungsten calculation results will be included into a new CD-ROM-2, by February 2008. The impact of the increased fluence has been assessed by comparing the Case 3) results (1 MWa/m2) with the corresponding ones of the Case 2) calculation (0.5 MWa/m2).I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
