Calculation of cracking under pulsed heat loads in tungsten manufactured according to ITER specifications

Arakcheev, A. S.; Skovorodin, D. I.; Burdakov, A. V.; Shoshin, A. A.; Polosatkin, S. V.; Vasilyev, Aleksey; Поступаев, В. В.; Vyacheslavov, L. N.; Kasatov, A. A.; Huber, A.; Mertens, Philippe; Wirtz, M.; Linsmeier, Ch.; Kreter, A.; Löwenhoff, Th.; Begrambekov, L. B.; Grunin, A. V.; Sadovskiy, Ya. A.

doi:10.1016/j.jnucmat.2015.09.034

Cited by 27 publications

(11 citation statements)

References 27 publications

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“…The following three conditions will be sufficient for explanation of the crack formation: 1) the target temperature exceeds the ductile-to-brittle transition temperature; 2) the maximum value of plastic stress exceeds the ultimate tensile strength; 3) the initial temperature of the target is less than the material-specific threshold. The numerical results of the model demonstrate good agreement with experimental data obtained at the JUDITH-1, PSI-2 and GOL-3 facilities [11], [18]. Experiments show that major cracks (cell size of 1000 µm) are attributed to the ductileto-brittle transition during cooling stage [9], [19].…”

Section: Cracking Formationsupporting

confidence: 71%

Comparison of tungsten modification after irradiation at different facilities for PSI studies

Shoshin¹,

Arakcheev²,

Батаев³

et al. 2016

AIP Conference Proceedings

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Section: Cracking Formationsupporting

confidence: 71%

Comparison of tungsten modification after irradiation at different facilities for PSI studies

Shoshin¹,

Arakcheev²,

Батаев³

et al. 2016

AIP Conference Proceedings

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“…The outgassing tests have been carried out to confirm that boron carbide ceramics can be used in the ITER vacuum chamber and meet the IVH requirements [12], i.e., the outgassing rate is not more than 1 × 10 −7 Pa•m 3 •s −1 •m −2 for hydrogen and not more than 1×10 −9 Pa•m 3 •s −1 •m −2 for all other impurities. Previously, data on the outgassing rate of hot-pressed ceramics and preliminary data on sintered ceramics were obtained [1].…”

Section: Sintered Ceramic Outgassing Testmentioning

confidence: 99%

Section: Evaluation Of Gas Emission At the Iter Ep #11mentioning

confidence: 99%

“…The total area of EP #11 will be 1015 m 2 , it will produce a gas load of 1.1•10 −5 Pa•m 3 •s −1 . If all eight equatorial diagnostic ports use a unified design and, accordingly, use boron carbide for neutron protection, the total gas flow from eight ports will be 8.8 × 10 −5 Pa•m 3 •s −1 . On the basis of [12,paragraph 17.8.1,Appendix 17 IVH], an estimate of the gas budget for diagnostic ports was made, which was 10 × 10 −5 Pa•m 3 •s −1 [1], [13].…”

Section: Evaluation Of Gas Emission At the Iter Ep #11mentioning

confidence: 99%

“…If all eight equatorial diagnostic ports use a unified design and, accordingly, use boron carbide for neutron protection, the total gas flow from eight ports will be 8.8 × 10 −5 Pa•m 3 •s −1 . On the basis of [12,paragraph 17.8.1,Appendix 17 IVH], an estimate of the gas budget for diagnostic ports was made, which was 10 × 10 −5 Pa•m 3 •s −1 [1], [13]. Thus, the gas emission of diagnostic ports with ceramics does not exceed this limit and all ports can use boron carbide.…”

Section: Evaluation Of Gas Emission At the Iter Ep #11mentioning

confidence: 99%

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Qualification of Boron Carbide Ceramics for Use in ITER Ports

Shoshin

Бурдаков

Ivantsivskiy

et al. 2020

IEEE Trans. Plasma Sci.

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Boron carbide has been proposed for the neutron protection of equipment in the ITER diagnostic ports and for reducing the dose to maintenance personnel. The chemical composition, vacuum, and thermal properties of ceramics of boron carbide were studied. It is demonstrated that the outgassing rate of ceramics meets the requirements of the ITER Vacuum Handbook. Calculation of the total gas emission from the ITER equatorial port #11 is carried out. The contact thermal conductivity at the boundary between ceramics and bronze is measured. Manganese content is determined by the method of activation analysis in ceramics. It is shown that sintered and hot-pressed boron carbide ceramics can be used in the ITER diagnostic ports. Index Terms-Boron carbide ceramic material properties, ITER port mechanical engineering. I. INTRODUCTION O NE of the functions of ITER diagnostic port-plugs is neutron protection of the equipment installed in the port, as well as reducing the radiation background in the area of reactor elements periodically requiring access to maintenance personnel. The Budker Institute of Nuclear Physics (BINP) is an integrator of ITER diagnostic ports (equatorial port #11, upper ports #02, 07, and 08). The BINP has extensive experience in the study of materials for fusion facilities using various technologies [1], including electron [2]-[4] and proton [5]-[7] accelerators, synchrotron radiation [8], [9], and theoretical modeling [10], [11].

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Formation and Transportation of an Intense Sub-Millisecond Electron Beam in a Longitudinal Magnetic Field in the Source with a Mesh Plasma Cathode

et al. 2017

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Calculation of cracking under pulsed heat loads in tungsten manufactured according to ITER specifications

Cited by 27 publications

References 27 publications

Comparison of tungsten modification after irradiation at different facilities for PSI studies

Comparison of tungsten modification after irradiation at different facilities for PSI studies

Qualification of Boron Carbide Ceramics for Use in ITER Ports

Formation and Transportation of an Intense Sub-Millisecond Electron Beam in a Longitudinal Magnetic Field in the Source with a Mesh Plasma Cathode

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