Manufacturing design of the ITER vacuum vessel lower port in Korea

Kim, H.S.; Park, Chulkyu; Hong, K.H.; Jin, Shijiu; Ahn, Hyun-Joo; Lee, H.G.; Kim, Y.G.; Lee, J.S.; Kim, T.S.; Won, J.G.; Sa, J.W.; Utin, Y.; Jun, Chang; Choi, Changhwan

doi:10.1016/j.fusengdes.2015.06.196

Cited by 2 publications

(5 citation statements)

References 3 publications

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“…A full‐scale mock‐up of the lower port stub extension #16 was fabricated to verify the fabrication feasibility and setup of the fabrication sequence for the lower port stub extension. Finally, for welding of inner shells and T ribs, the entire fabrication sequence including welding and nondestructive examination methods (e.g., ultrasonic test or examination) has been established in Korea as the suppliers have a mission with challenging tolerance and inspection requirements …”

Section: Progress Of the Iter Projectmentioning

confidence: 99%

“…Finally, for welding of inner shells and T ribs, the entire fabrication sequence including welding and nondestructive examination methods (e.g., ultrasonic test or examination) has been established in Korea as the suppliers have a mission with challenging tolerance and inspection requirements. 13,14…”

Section: Vv Portsmentioning

confidence: 99%

“…There has been a report on the fabrication procedure of preparing a full‐scale mock‐up of the ITER VV port and lower port in Korea. A full‐scale mock‐up of the lower port stub extension #16 was fabricated to verify the fabrication feasibility and setup of the fabrication sequence for the lower port stub extension.…”

Section: Progress Of the Iter Projectmentioning

confidence: 99%

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Fusion energy development status in Korea

et al. 2017

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SummaryThis overview discusses the status of fusion energy development in the Republic of Korea. Korea studies fusion energy through research and development in 2 ways: one by performing the Korea Superconducting Tokamak Advanced Research (KSTAR) for a domestic approach and the other by participating in the international collaboration project ITER. Korea had remarkable progresses not only in KSTAR but also in the ITER project in 2016. In KSTAR, a world record of more than 70 seconds in high-performance plasma (H-mode) operation in the superconducting tokamak has been achieved. For the ITER project, toroidal field conductors have been successfully accomplished and the other major equipment such as vacuum vessel sectors, ports, and assembly tooling seem to be reaching an end. This paper deals with current research and development results on both fields of KSTAR study and ITER project progress.

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Section: Progress Of the Iter Projectmentioning

confidence: 99%

Section: Vv Portsmentioning

confidence: 99%

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Fusion energy development status in Korea

et al. 2017

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“…Based on its role as the first safety barrier and mechanical support for plasma-facing components, the ITER VV is classified as a safety-important component and a protectionimportant component [12]. Specifically, it is classified as category IV pressure equipment under the French Decree on the design and construction of pressure equipment (ESP) and as Nuclear level N2 under the French Order Concerning Nuclear Pressure Equipment because pressurized cooling water (i.e., up to 1.1 MPa in normal operation) is applied during its operation [13,14].…”

Section: Introductionmentioning

confidence: 99%

“…Specifically, it is classified as category IV pressure equipment under the French Decree on the design and construction of pressure equipment (ESP) and as Nuclear level N2 under the French Order Concerning Nuclear Pressure Equipment because pressurized cooling water (i.e., up to 1.1 MPa in normal operation) is applied during its operation [13,14]. Moreover, it is categorized as a class-2 welded box structure with supporting and leak-tight components according to RCC-MR 2007, which is the relevant technical guideline pertaining to its design and construction [12][13][14]. The manufactured ITER VV must comply with the assigned codes, regulations, and ITER requirements, including all manufacturing processes.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the functional acceptability of the ITER vacuum vessel

et al. 2022

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The International Thermonuclear Experimental Reactor (ITER) vacuum vessel (VV) is one of the critical components of the ITER tokamak fusion reactor. The first sector of the ITER VV was delivered to ITER Organization in 2020, and it is ready to assemble into the tokamak system. After manufacturing the ITER VV, an evaluation should ensure that the components are designed and manufactured to meet the functional requirements, such as vacuum leak tightness and structural integrity. The factory acceptance test (FAT) is essential for confirming acceptance in engineering and manufacturing. This paper introduces the engineering process and technical method of the FAT, which is applied explicitly to the first-of-a-kind ITER VV. We establish a visual inspection, pre-pumping assessment, pressure test, helium (vacuum) leak test, and final dimensional inspection for the FAT. The visual inspection revealed no blockages in the cooling channels of the double walls. The pre-pumping assessment conducted to check the vacuum level and residual gas condition, concluded that the inside of the VV was flawless and thus met the leak test requirements of 1 × 10-8 Pa m3/s. We confirmed no leakage or deformation through the pressure test under reduced pressure. The helium leak test demonstrated engineering soundness with leak tightness of 6.08 × 10-9 Pa m3/s, which is more stringent than the allowable limit. Furthermore, three-dimensional metrology was utilized to determine the as-built dimensions of the manufactured sector. Due to unavoidable weld deformation and tight tolerances, the as-built result does not perfectly meet the assigned tolerance level. Nevertheless, it can be considered as advanced information for assembly with in-vessel components and other sectors. Based on the conformance and suitability of the suggested FAT for the first ITER VV sector, we will determine the acceptability of the upcoming VV sectors, which will be manufactured and delivered by Korea shortly.

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Manufacturing design of the ITER vacuum vessel lower port in Korea

Cited by 2 publications

References 3 publications

Fusion energy development status in Korea

Fusion energy development status in Korea

Evaluation of the functional acceptability of the ITER vacuum vessel

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