Progress in the initial design activities for the European DEMO divertor: Subproject “Cassette”

You, J.-H.; Mazzone, G.; Bachmann, C.; Coccorese, D.; Cocilovo, V.; Meis, Domenico De; Maio, P.A. Di; Dongiovanni, Danilo Nicola; Frosi, P.; Gironimo, Giuseppe Di; Garitta, S.; Mariano, G.; Marzullo, D.; Porfiri, M.T.; Ramogida, G.; Vallone, E.; Villari, R.; Zucchetti, Massimo

doi:10.1016/j.fusengdes.2017.03.018

Cited by 51 publications

(40 citation statements)

References 12 publications

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“…Also, the maximum vertical deflection of the cassette of 1.3 mm is close to the one reported in Ref. [10] (1.4 mm). The observed differences may be attributed to different current loadings but also to different material properties used in the analyses (not reported in Ref.…”

Section: Vde Current Of 410 Kasupporting

confidence: 88%

“…The maximum von Mises stress of 260 MPa (located in the clamped regions of the supports) is very close to the one presented in Ref. [10] (250 MPa). Also, the maximum vertical deflection of the cassette of 1.3 mm is close to the one reported in Ref.…”

Section: Vde Current Of 410 Kasupporting

confidence: 86%

“…(4) and to validate the approach with the results published in Ref. [10]. The analysis for each of the current paths is decomposed into two uncoupled simulations.…”

Section: Methodsmentioning

confidence: 99%

“…The observed differences may be attributed to different current loadings but also to different material properties used in the analyses (not reported in Ref. [10]).…”

Section: Vde Current Of 410 Kamentioning

confidence: 99%

“…In this way, a critical VDE current of I V DE = 410 kA per divertor is obtained. Note that a slightly lower value of 360 kA was used in a similar electromagnetic force analysis for the divertor cassette [10] (but not for the water-cooling pipes) when using a 54 divertor design option.…”

Section: Vde Current Of 410 Kamentioning

confidence: 99%

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Study of electromagnetic disruption forces for plasma detachment measurements in DEMO

Shawish

Giannone

Kallenbach

2019

Fusion Engineering and Design

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Global plasma instabilities such as plasma disruptions and vertical displacement events (VDEs) can generate huge transient electrical currents in the conductive parts of the divertor. The interaction of the currents with the magnetic field induces Lorentz force loads. Particularly, the force induced by a VDE can impose a critical impact on the divertor water-cooling pipes due to high current density. A recently proposed isolated-target design solution for the DEMO divertor introduces a shunt element between the target plate and the cassette body to divert electrical current towards more massive cassette body. Such a design solution is also considered as a diagnostic tool for measuring thermo currents (voltages) through a shunt resistor to control plasma detachment.In this study, a finite-element analysis is performed to provide a conservative upper value for the shunt resistance by investigating the impact of the electromagnetic disruption forces on the integrity of water-cooling pipes in the isolated-target design solution of the DEMO divertor. In the analysis, a maximum allowed pipe current is estimated assuming realistic material properties and magnetic fields, and true geometries of the divertor cassette and water-cooling pipes fixed to the cassette. The results show that local pipe yielding (representing damage initiation) develops for electrical currents larger than ∼3.5 kA, which sets a conservative (assuming extreme VDE halo currents) upper value for the shunt resistance to ∼40 µΩ.

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Section: Vde Current Of 410 Kasupporting

confidence: 88%

Section: Vde Current Of 410 Kasupporting

confidence: 86%

“…(4) and to validate the approach with the results published in Ref. [10]. The analysis for each of the current paths is decomposed into two uncoupled simulations.…”

Section: Methodsmentioning

confidence: 99%

“…The observed differences may be attributed to different current loadings but also to different material properties used in the analyses (not reported in Ref. [10]).…”

Section: Vde Current Of 410 Kamentioning

confidence: 99%

Section: Vde Current Of 410 Kamentioning

confidence: 99%

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