PSI - Issue 24

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2019) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2019) 000 – 000

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ScienceDirect

Procedia Structural Integrity 24 (2019) 898–905

AIAS 2019 International Conference on Stress Analysis Structural assessment of TF superconducting magnet of the DTT device Andrea Chiappa a, *, Aldo Di Zenobio b , Francesco Giorgetti c , Corrado Groth a , Luigi Muzzi b , Stefano Porziani a , Simonetta Turtù b , Domenico Regine a , Marco Evangelos Biancolini a AIAS 2019 International Conference on Stress Analysis Structural assessment of TF superconducting magnet of the DTT device Andrea Chiappa a, *, Aldo Di Zenobio b , Francesco Giorgetti c , Corrado Groth a , Luigi Muzzi b , Stefano Porziani a , Simonetta Turtù b , Domenico Regine a , Marco Evangelos Biancolini a

a University of Rome “Tor Vergata”, Viale del Politecnico 1, Rome 00133, Italy b ENEA Frascati Research Center, Via E. Fermi 45, Frascati 00044, Italy c Università degli Studi della Tuscia, Largo dell’Università, Viterbo 01100, Italy a University of Rome “Tor Vergata”, Viale del Pol tecnico 1, Rome 0133, Italy b ENEA Frascati Research Center, Via E. Fermi 45, Frascati 00044, Italy c Università degli Studi della Tuscia, Largo dell’Università, Viterbo 01100, Italy

Abstract Abstract

© 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the AIAS2019 organizers © 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the AIAS2019 organizers The structural ass ssment has been perform d for the Single Nul (SN) reference scenario, a opting Ansys® Workbench™ a numerical to l. Elec romagnetic load has been evaluated by calculating with he TOSCA® code the magneti field components on a cloud of points within the TF winding pack. The pointwise inf rmation on Lorentz density of forces has been th transferred onto the FEA mesh usi g the software embedded interpolation tool. 3D FEM analysis of the TF coil as b en ccomplished consi ering the Winding Pack (WP) as h mogeneous body. The steel casing was the object of the stress assessment, evaluated along a path through the most critical location on the equatorial cross section. © 2019 The Authors. Published by Elsevier B.V. This is an ope acces article under CC BY-NC-ND lic nse (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the AIAS2019 organizers The paper presents the multi-physics study of the Toroidal Field (TF) coils of the DTT device, as defined according to the design of the “Divertor Tokamak Test facility Interim Design Report” also known as the “green book”. TF coils winding packs are constituted by 5 Double-Pancakes (DP), enclosed into a SS316LN casing for structural reinforcement. The conductor design is based on a 0.82 mm Nb 3 Sn strand similar to what already produced for the ITER TF coils. The structural assessment has been performed for the Single Null (SN) reference scenario, adopting Ansys® Workbench™ as numerical tool. Electromagnetic load has been evaluated by calculating with the TOSCA® code the magnetic field components on a cloud of points within the TF winding pack. The pointwise information on Lorentz density of forces has been then transferred onto the FEA mesh using the software embedded interpolation tool. The 3D FEM analysis of the TF coil has been accomplished considering the Winding Pack (WP) as a homogeneous body. The steel casing was the object of the stress assessment, evaluated along a path through the most critical location on the equatorial cross section. The paper presents the ulti-physi s study of the Toroidal Field (TF) coils of the DTT d vice, as defined accordi g to the design of the “Divertor T kamak Test facility Interim Design Report” also k own as the “gre n book”. TF coils winding packs are constituted by 5 Double-Panc kes (DP), enclosed into a SS316LN casing for structural reinforcement. The conductor design is based on a 0.82 mm Nb 3 Sn strand similar to what already produced for the ITER TF oils. Keywords: Divertor Tokamak Test Facility; Toroidal Field; structural assessment; FEM; smeared material; Radial Basis Functions Keywords: Divertor Tokamak Test Facility; Toroidal Field; structural assessment; FEM; smeared material; Radial Basis Functions

* Corresponding author. Tel.: +39-06-72597136 E-mail address: andrea.chiappa@uniroma2.it * Correspon ing author. Tel.: +39-06-72597136 E-mail address: andrea.chiappa@uniroma2.it

2452-3216 © 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the AIAS2019 organizers 2452-3216 © 2019 The Authors. Published by Elsevier B.V. This is an ope acces article under CC BY-NC-ND lic nse (http://creativecommons.org/licenses/by-nc-nd/4.0/)

Peer-review under responsibility of the AIAS2019 organizers

2452-3216 © 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the AIAS2019 organizers 10.1016/j.prostr.2020.02.079