Development of Accident Tolerant SIC/SIC Composite For Nuclear Reactor Channel Box

Suyama, Shoko; Ukai, Masaru; Uchihashi, Masayuki; Heki, Hideaki; Tajima, Satoko; Okonogi, Kazunari; Kakiuchi, Kazuo

doi:10.1002/9781119211709.ch4

Cited by 1 publication

(3 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, this process is suitable for forming thin-walled structures, such as the channel box (rectangular structure with thin walls) and the cladding tube (cylindrical structure with thin walls). For the reasons stated above, the CVI process is an effective method for producing SiC/SiC composites that satisfy the requirements of core structures, though issues relating to hydrothermal corrosion, porosity, scalability, and manufacturing costs remain [5].…”

Section: Methodsmentioning

confidence: 99%

“…Silicon carbide matrix composites are being considered for use as a material for hot section parts of jet engines and gas turbines, and for fusion structural materials [1][2][3]. Recent high-profile events, such as the incident at the Fukushima Daiichi nuclear power plant, have turned attention to SiC/SiC composites as potential candidates for structural materials to be used in accident-tolerant fuel (ATF) systems of light water reactor (LWR) applications [4][5][6][7][8][9][10][11]. In the incident at the Fukushima Daiichi nuclear power plant, the oxidation of metallic components in high-temperature steam generated hydrogen and caused the explosion of the reactor building.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, many research institutions and industry leaders have formed collaborative teams to start ATF development programs in order to apply SiC/SiC composites to LWR applications [8][9][10]. Toshiba has started designing materials for applying the SiC/SiC composites to the accident-tolerant LWR fuel cladding and core structures and has been developing process technologies for thin-walled and elongated CVI-SiC/SiC-based tubes and boxes [5,6]. Small-scale prototypes of thin-walled CVI-processed SiC composite tubes and boxes made from SiC fibrous pre-forms have been fabricated [6,8].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Hydrothermal Corrosion Behaviors of Constituent Materials of SiC/SiC Composites for LWR Applications

et al. 2019

Self Cite

View full text Add to dashboard Cite

The corrosion behaviors of SiC/SiC composite constituent materials in pure water at operating conditions, such as 300 °C and 8.5 MPa, were studied for potential application in accident-tolerant light water reactor (LWR) fuel cladding and core structures. Five kinds of SiC fibers, four kinds of SiC matrices, and three kinds of fiber/matrix interphase materials were examined in autoclaves. The potential constituent materials for future use in SiC/SiC composites were selected by considering corrosion rates and residual strength characteristics. The mass changes and the residual strength of each specimen were measured. SEM images of the surface layers were also inspected. The SiC fibers, regardless of their purity, crystallinity or stoichiometric ratio, decreased in strength due to the hydrothermal corrosion. For its part, the hydrothermal corrosion resistance of CVD-SiC, as a SiC matrix, was found to be affected by manufacturing conditions such as raw material gas type and synthesis temperature, as well as post-machining morphology. The CVD-carbon (CVD-C), as a fiber/matrix interphase material, showed good hydrothermal corrosion resistance. In order to protect the SiC fibers and the SiC matrices from hydrothermal corrosion, it would appear to be necessary to apply a dense CVD-C coating to both every fiber and the entire surface of the SiC matrices.

show abstract

Section: Methodsmentioning

confidence: 99%