Analyses of Low- and High-Margin Quench Propagation in the European DEMO TF Coil Winding Pack

Laura Savoldi, Roberto Bonifetto, Roberto Zanino, Luigi Muzzi

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The superconducting toroidal field (TF) coils composed of a winding pack (WP) without radial plates, encapsulated in a steel casing, are currently being studied in the framework of the EUROfusion work package magnets (WPMAG). The ENEA (Italian National Agency for New Technologies, Energy and Sustainable Economic Development) 2014 TF WP design consists of graded (Nb3Sn + NbTi), double-layer wound rectangular cable-in-conduit conductors, for which the operational as well as accidental transients must be carefully investigated. This paper presents the analysis of the quench propagation inside the TF WP proposed in 2014 by ENEA using the state-of-the-art thermal-hydraulic code 4C. Different locations are considered for the quench initiation: 1) at the maximum temperature margin Δ Tmaxmar, resulting in the most severe hotspot condition and 2) at the minimum temperature margin Δminmar, to analyze the most probable event. The evolution of voltage, normal zone, hotspot temperature, and maximum pressure in the TF WP is computed comparing the results from the two cases, highlighting the role of heat diffusion inside the TF WP.
Original languageEnglish
Article number7446346
Pages (from-to)1564 - 1570
Number of pages7
JournalIEEE Transactions on Plasma Science
Volume44
Issue number9
DOIs
Publication statusPublished - 1 Sep 2016
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Condensed Matter Physics

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