Design of Heat-Resistant in-Vessel Components for Deuterium Beam-Aided Charge Exchange Recombination Spectroscopy in JT-60SA. (17th February 2022)

• Record Type: Journal Article
• Authors: Terakado, A.; Koide, Y.; Yoshida, M.; Nakano, T.; Homma, H.; Oyama, N.
• Is Part Of: Fusion science and technology. Volume 78:Number 2(2022)
• Page Start: 89
• Page End: 95
• Publication Date: 2022-02-17
• Subjects: JT-60SA -- charge exchange recombination spectroscopy -- thermomechanical analysis; Fusion reactors -- Periodicals; Nuclear fusion -- Periodicals; Fusion reactors; Nuclear fusion; Periodicals; 621.48405
• DOI: 10.1080/15361055.2021.1951529
• Languages: English
• ISSNs: 1536-1055

Abstract

Abstract: Heat-resistant in-vessel components, i.e., a heat sink, a front-end optics housing, and a diagnostic window have been designed in terms of heat-handling capability and thermal stress and mechanical stress by using a finite element method code. The heat sink, which is exposed to a plasma heat flux of up to 0.3 MW/m 2, consists of carbon tiles, a carbon sheet, and a stainless steel heat sink with a water-cooling channel. Analysis shows that at a water flow rate of 0.9 kg/s with a water pressure of 0.5 MPa, an increase in the carbon tile temperature is mitigated below the limit related with detrimental red-hot (900°C). The front-end optics housing temperature and the diagnostic window of sapphire glass temperature are within the allowable temperature. The thermal stress and mechanical stress are less than the allowable value, respectively.