Validation of VINCENTA modelling based on an experiment with the central solenoid model coil of the International Thermonuclear Experimental Reactor

Amoskov, Victor M.; Белов, А. В.; Belyakov, V. A.; Filatov, O.; Ilyasov, O.; Kalinin, V.V.; Kaparkova, Marina V.; Kukhtin, V.; Shatil, N.; Sytchevsky, S.; Vasiliev, V.

doi:10.1080/10519990500518001

Cited by 11 publications

(6 citation statements)

References 5 publications

(8 reference statements)

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“…All the pipes, safety valves and burst disks are sized to keep the overpressure below 4 bar. Our calculations with Vincenta [15] show that the pressure doesn't exceed 3.5 bar in a full quench case and 3.9 bar in the full fault scenario. We have also developed an innovative thermo-mechanical ferrule to maintain the cold mass temperature at 1.8 K and the eddy current shield temperature at 30 K.…”

Section: Introductionmentioning

confidence: 79%

“…The calculations have been computed with the Vincenta code [15] with the conservative conditions: At t = 0.1 s the coil is fully quenched, the initial temperature and pressure considered are 3 K and 1200 hPa. The water leak from the bore tube generates progressively 0.95 MW over a deviation of 11 s into the He vessel.…”

Section: Thermal Analysis and Thermo-hydraulics Of The Fault Scenariomentioning

confidence: 99%

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Cryogenic Design of the 43 T LNCMI Grenoble Hybrid Magnet

et al. 2015

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The association of two inner resistive coils (Polyhelix and Bitter) producing 34.5 T with an outer NbTi superconducting coil producing 8.5 T to obtain a 43 T hybrid magnet is a technical challenge. Accidental failure modes leading to complex electromagnetic behaviors and large transient dynamical forces should be anticipated. These considerations lead to a reinforced design and a thermo-hydraulic strategy to limit the overpressure. The cryostat has been designed with innovative thermomechanical supports sustaining the coil at 1.8 K-1200 hPa and the eddy current shield at 30 K, both being possibly overloaded by high dynamic forces in the worst accidental failure case.

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Section: Introductionmentioning

confidence: 79%

Section: Thermal Analysis and Thermo-hydraulics Of The Fault Scenariomentioning

confidence: 99%

Cryogenic Design of the 43 T LNCMI Grenoble Hybrid Magnet

et al. 2015

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“…The VINCENTA [ 39 ] simulation model couples the 1-D thermo-hydraulic model for the SC cables and 2-D thermal diffusion model for the transverse heat conduction at a few discrete locations. The 1-D model is used to simulate the transient behavior of compressible helium flow in CICC while the 2-D heat diffusion model is used to simulate the heat diffusion in the support structure.…”

Section: Cryogenic Fluid Flow and Heat Transfer In Fusion Devicementioning

confidence: 99%

“…This model can simulate the whole coil with its cryogenic loop, leading to a detailed but complex model. The validation of the VINCENTA model has been done for CSMC of ITER [ 39 ]. Also the simulation of the ITER TF coil has been performed with the VINCENTA model [ 40 ] which is also a basis for the specification of the cryogenic forced flow cooling loop of ITER [ 32 ].…”

Section: Cryogenic Fluid Flow and Heat Transfer In Fusion Devicementioning

confidence: 99%

Forced flow cryogenic cooling in fusion devices: A review

Vaghela

Lakhera

Sarkar

2021

Heliyon

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The constantly increasing energy consumption along with the depleting fossil fuel resources as well as owing to the fact that the nuclear fission not being an intrinsically safe method of energy generation, it has become necessary to look for other solutions to fulfil the future energy demands. Nuclear fusion, the source of energy for billions of stars, has attracted the attention of scientists and engineers despite a lot of technical challenges in the replication of the fusion process in laboratories. For fusion to take place in a device, one of the major challenges faced is the strong magnetic confinement of the plasma using large superconducting (SC) magnets, which need efficient cryogenic cooling techniques to maintain the required low temperatures for the superconducting state. In order to maintain the compactness, the SC magnets generally employ Cable in Conduit Conductor (CICC) windings, carrying high current densities, which are cooled by the forced flow of helium at ~4 K temperature to maintain the required superconducting temperatures. The construction of CICC aims to maintain the superconductivity state by optimization of various parameters such as thermal stability, the ratio of normal conductor to SC material, mechanical strength, low hydraulic impedance, current density, magnetic field, etc. The cryogenic thermal stability of the CICC is of prime importance for safe, stable and reliable operation of SC magnets. The prediction of thermal and hydraulic behavior of the CICC in large SC magnets is difficult due to the complex geometry involved, the variation in fluid properties, various heat in-flux incidences over the long length of CICC and a complex heat transport phenomenon. Another application which utilizes a forced flow cryogenic cooling in the fusion devices is a cryo-adsorption pump for creating clean and high vacuum with large pumping speed. This paper presents an overview of the forced flow cryogenic cooling schemes in fusion devices along with a systematic review of the thermal and hydraulic studies related to CICC and cryo-adsorption pump, thereby highlighting the challenges and opportunities for further improvement in their design and performance.

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“…The hydraulics circuit external to the magnet is modeled by the VINCENTA thermal hydraulics code [3]. The modeling takes account of the volume of helium in which the magnet is bathed, the exhaust pipe towards the two quench valves, the valves and the volumes of helium of the satellite as shown in Fig.…”

Section: B Example: Quench Of 43 Iseult Pancakesmentioning

confidence: 99%

Helium Pressure Increase During a Quench of the Iseult Coil

Meuris

Maksoud

Brédy

2012

IEEE Trans. Appl. Supercond.

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An experimental model has been studied to predict the pressure rise in the Iseult coil during a quench. The model is built of 10 copper equivalent pancake slices and 7 helium channels per pancake. The heat produced by a quench of the Iseult magnet is simulated by electrical heaters put inside each copper plate. Cryogenic pressure and temperature sensors have been fitted in the helium channels and in the bath. The model is cooled by pressurized superfluid helium at 1.8 K. Bath pressure measurements are given for various heating powers and various numbers of heated plates. A scaling law is put forward to extrapolate the model results to the Iseult pressure rise during a quench. Then the hydraulic circuit is numerically simulated to verify the efficiency of the quench valves to limit the pressure to 0.4 MPa.

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Validation of VINCENTA modelling based on an experiment with the central solenoid model coil of the International Thermonuclear Experimental Reactor

Cited by 11 publications

References 5 publications

Cryogenic Design of the 43 T LNCMI Grenoble Hybrid Magnet

Cryogenic Design of the 43 T LNCMI Grenoble Hybrid Magnet

Forced flow cryogenic cooling in fusion devices: A review

Helium Pressure Increase During a Quench of the Iseult Coil

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