Prime pagine RA2010FUS:Copia di Layout 1 - ENEA - Fusione

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088 progress report 2010 chapter 4 superconductivity During 2010 the Superconductivity laboratory activities regarded manufacturing and testing of conductor samples for ITER (the way in latin) and its satellite facilities, in addition to characterization and research on conventional low–temperature superconducting (LTS) materials and high temperature superconductor (HTS) coated conductors. Concerning the cable–in–conduit conductor (CICC) production, ENEA was involved in manufacturing the two poloidal field (PF) conductor samples PF1 and PF2 for ITER, and in the compaction of ITER centrals solenoid (CS) empty tubes. Activities were also carried out for the feasibility verification of the superconducting toroidal field (TF) magnet system of the Fusion Advanced Studies Torus (FAST). Besides these activities, ENEA was involved in the heat exchanger design for the 30 kA current leads of ENEA CICC upgrade facility and in the study on the effect of strand bending on the voltage-current characteristic of Nb 3 Sn CICCs. R&D on LTS was devoted to transport and structural studies on NbTi and Nb 3 Sn strands. Direct inter– filament resistivity measurements were extended from Nb 3 Sn to NbTi samples; with the aim to clarify how the jacket affects the strain configuration in the complex system of multi–filamentary strands, ENEA carried out high–resolution x–ray diffraction measurements at the high–energy scattering beam–line ID15B of the European Synchrotron Radiation Facility (ESRF) in Grenoble. The ENEA 2–components pinning model for NbTi has been updated in order to take into account the temperature non–scaling. Several commercial Nb 3 Sn and NbTi samples have been characterized by means of inductive and transport measurements in the ENEA superconductivity facilities.
superconductivity (cont’d.) progress report 2010 089 4.1 Cable–in–Conduit Conductor Manufacturing of ITER poloidal field conductor samples ENEA is involved in the ITER program for the final qualification of the conductors before the production phase. In this framework ENEA was awarded two contracts, one from Iter Organization (IO) and one from Fusion for Energy (F4E), for the manufacturing of two PF conductor samples (PF1 and PF2, ITER/CT/09/4300000048 Support on ITER PF conductor sample design and preparation; F4E–2009–OPE–021 (MS–MG) PF conductor sample). The activities started at the end of 2009 and went on for the first months of 2010, and have been split between ENEA and Commissariat à l’Energie Atomique (CEA) laboratories. In particular, ENEA took care of jacketing and compacting the cables supplied by IO and F4E (PF1 cable manufactured by the Russian Domestic Agency and PF2 by Chinese Domestic Agency), of preparing the cables and designing, manufacturing and assembling the hairpin boxes. The hairpin box solution (fig. 4.1), an ENEA concept which avoids the use of a resistive joint between the two conductors, should diminish the possibility of current redistribution effects close to the high field sample zone. CEA prepared the upper terminations, assembled at ENEA laboratories, and performed the sample insulation (fig. 4.2) and instrumentation at CEA laboratories. As a result of these contracts’ activities, two samples have been delivered to Centre de Recherches en Physique des Plasmas (CRPP) and successfully tested there in the SULTAN facility. Figure 4.1 – Hairpin box Figure 4.2 – PF sample, clamping and insulation Compaction of ITER CS empty tubes To the purpose of obtaining a relevant stress–strain state to perform bending trials in preparation of the winding operations, IO placed a contract to ENEA to compact 10 empty tubes of 316LN steel. In this framework, ENEA took care of all the relevant activities concerned with the compaction (fig. 4.3). In particular, a deep inspection of the tubes external surface has been performed together with a comprehensive dimensional survey of Figure 4.3 – ITER CS during compaction
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Prime pagine RA2010FUS:Copia di Layout 1 - ENEA - Fusione

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