Hydrogen isotopes permeation evaluation in the advanced material for nuclear fusion blanket use

Minami, Tsutomu; Niigawa, S.; Ueno, Yukihisa; Hinoki, Tatsuya; Yamämoto, Yasushi; Konishi, Satoshi

doi:10.1109/fusion.2007.4337867

Cited by 4 publications

(4 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The hydrogen permeation coefficient of monolithic chemical vapor deposition (CVD) SiC is found to be very low [38], [39]. One measurement found monolithic SiC to have permeability four orders of magnitude lower than SS316 at 550 • C, with the SiC at 950 • C having similar permeability to steel (SS316) at 550 • C [40].…”

Section: A Sic F /Sicmentioning

confidence: 99%

Overview of Kyoto Fusioneering’s SCYLLA© (“Self-Cooled Yuryo Lithium-Lead Advanced”) Blanket for Commercial Fusion Reactors

Pearson¹,

Baus²,

Konishi³

et al. 2022

IEEE Trans. Plasma Sci.

View full text Add to dashboard Cite

This article outlines Kyoto Fusioneering's (KF's) initial engineering and development activities for its self-cooled lithium lead-type blanket: Self-Cooled Yuryo Lithium-Lead Advanced (SCYLLA©). We provide details on overall design, including an initial tritium breeding ratio (TBR) assessment via neutronics analysis, as well as the status of SCYLLA©-relevant R&D. This includes silicon carbide composite (SiC f /SiC) manufacturing techniques, tritium extraction, materials compatibility, and heat transfer, which are being explored via collaboration with Kyoto University. Results of previous work in relation to this R&D are presented. Permeability coefficients indicate a promising property of SiC f /SiC tritium hermeticity at high temperatures. Tritium extraction technology via vacuum sieve tray (VST) is shown to be demonstrated at engineering scale. A local TBR of up to 1.4 can be achieved with the SCYLLA© configuration. Fabrication methods for various SiC f /SiC components including the blanket module, heat exchanger, and flow path components are provided. A tritium compatible high-temperature SiC f /SiC heat exchanger is discussed. Commercial viability and reactor adaptability are considered as a theme throughout. Finally, KF's plans to build a facility for demonstration reactor relevant testing of a SCYLLA© prototype in the mid-2020s, which will provide a significant step toward commercial fusion energy, are presented.

show abstract

Section: A Sic F /Sicmentioning

confidence: 99%

Overview of Kyoto Fusioneering’s SCYLLA© (“Self-Cooled Yuryo Lithium-Lead Advanced”) Blanket for Commercial Fusion Reactors

Pearson¹,

Baus²,

Konishi³

et al. 2022

IEEE Trans. Plasma Sci.

View full text Add to dashboard Cite

show abstract

“…The permeation measurement device is almost same one described in [3]. The sample was fixed between two 1/2 inch VCR couplings with metal gaskets.…”

Section: A Permeability Measurement Devicementioning

confidence: 99%

“…Comparison of pressure increase rate [Pa/sec] (permeation flow rate) obtained by experiments and model calculation were summarized in Table I, where we assumed SS316 permeability was K ′ = 5.12 × 10 −2 (− 3120⁄ ), based our previous experimental results [3].…”

Section: Comparison With Experimentsmentioning

confidence: 99%

“…But number of reported data of hydrogen diffusion coefficient of SiC is limited and there is several order difference between them. Therefore, we have been making measurements of deuterium permeability of SiC materials using a device developed by ourselves [3,4]. In the experiments, it is important to suppress wraparound flows through sample holder made by 316 stainless steel (SS316) at high temperature ( > 600 °C) for measurements of the small permeation flow through SiC sample, as hydrogen isotope permeability of SiCs is expected to be smaller than that of SS316 by 1-3 order at those high temperature.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Error evaluation in hydrogen isotope permeability measurement and the required degree of vacuum

Yamamoto

Takemoto

Murakami

et al. 2013

2013 IEEE 25th Symposium on Fusion Engineering (SOFE)

Self Cite

View full text Add to dashboard Cite

In the measurement of the hydrogen isotope permeability of Silicon-Carbide, control and the evaluation of the wraparound through the sample holder is important problem. For this purpose, the heated holder part is enclosed by a glass tube and kept at vacuum during experiments, but detail examination about required degree of the vacuum has not be made. In this paper, the amount of the wraparound flow was evacuated by experiments and model calculations. It is found in the experiments, the flow rate from glass tube to the low pressure line is linear dependence on the tube pressure at 0.1~100 Pa, although that from high pressure line into the glass tube is proportional to square-root of pressure of the high pressure line as expected. The ratio of the wraparound flow to the mail flow during permeation measurement condition was estimated to be 6~10 % from the extrapolation of experiments results. On the other hand, the model calculation results were still one order higher than observed even when first-order dependency was assumed. The impurities on outer surface of the holder or gas are considered to limit the permeation in the experiments.

show abstract

Diffusion and solution of hydrogen isotopes in lithium-lead blanket materials

Nadaoka

Uriu

Yamämoto

et al. 2009

2009 23rd IEEE/NPSS Symposium on Fusion Engineering

View full text Add to dashboard Cite

Hydrogen isotopes permeation evaluation in the advanced material for nuclear fusion blanket use

Cited by 4 publications

References 11 publications

Overview of Kyoto Fusioneering’s SCYLLA© (“Self-Cooled Yuryo Lithium-Lead Advanced”) Blanket for Commercial Fusion Reactors

Overview of Kyoto Fusioneering’s SCYLLA© (“Self-Cooled Yuryo Lithium-Lead Advanced”) Blanket for Commercial Fusion Reactors

Error evaluation in hydrogen isotope permeability measurement and the required degree of vacuum

Diffusion and solution of hydrogen isotopes in lithium-lead blanket materials

Contact Info

Product

Resources

About