Estimation of neutron yields produced from SS316L, CuCrZr, and graphite targets for MeV-energy electrons toward JT-60 Tokamak fusion device

Sukegawa, Atsuhiko M.; Okuno, Koichi; Tanaka, Seiichiro

doi:10.1016/j.fusengdes.2018.07.008

Cited by 1 publication

(3 citation statements)

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“… ( a ) Tokamak device in the nuclear industry; ( b ) schematic of Tokamak device structure; ( c ) cross-section of a vacuum radiation shielding structure [ 2 ]. …”

Section: Figurementioning

confidence: 99%

“…The vacuum radiation shielding structure is of high research value as the core component of heat insulation and radiation protection. A typical cross-section of a vacuum radiation shielding structure is shown in Figure 1 c [ 2 ]. In this structure, CuCrZr serves the function of heat dissipation, while a double-wall configuration comprising an SS316L plate and an internal radiation shielding material is employed to shield fusion neutrons.…”

Section: Introductionmentioning

confidence: 99%

“…Although this technique has a smaller heat-affected zone and is less prone to stress concentrations than HIP diffusion joining and conventional welding techniques, it is observed that the hardness degradation is more pronounced. (c) cross-section of a vacuum radiation shielding structure [2].…”

Section: Introductionmentioning

confidence: 99%

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Microhardness and Tensile Strength Analysis of SS316L/CuCrZr Interface by Laser Powder Bed Fusion

Jin,

Hoo,

Jin

et al. 2024

Materials

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Metallic joints within tokamak devices necessitate high interface hardness and superior bonding properties. However, conventional manufacturing techniques, specifically the hot isostatic pressing (HIP) diffusion joining process, encounter challenges, including the degradation of the SS316L/CuCrZr interface and CuCrZr hardness. To address this, we explore the potential of laser powder bed fusion (LPBF) technology. To assess its viability, we fabricated 54 SS316L/CuCrZr samples and systematically investigated the impact of varied process parameters on the microhardness and tensile strength of the dissimilar metal interfaces. Through comprehensive analysis, integrating scanning electron microscopy (SEM) imagery, we elucidated the mechanisms underlying mechanical property alterations. Notably, within a laser volumetric energy density range of 60 J/mm3 to 90 J/mm3, we achieved elevated interface hardness (around 150 HV) and commendable bonding quality. Comparative analysis against traditional methods revealed a substantial enhancement of 30% to 40% in interface hardness with additive manufacturing, effectively mitigating CuCrZr hardness degradation.

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“… ( a ) Tokamak device in the nuclear industry; ( b ) schematic of Tokamak device structure; ( c ) cross-section of a vacuum radiation shielding structure [ 2 ]. …”

Section: Figurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%