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Development and trial manufacturing of 1/2-scale partial mock-up of blanket box structure for fusion experimental reactor

Technical Report:

Abstract

Conceptual design of breeding blanket has been discussed during the CDA (Conceptual Design Activities) of ITER (International Thermonuclear Experimental Reactor). Structural concept of breeding blanket is based on box structure integrated with first wall and shield, which consists of three coolant manifolds for first wall, breeding and shield regions. The first wall must have cooling channels to remove surface heat flux and nuclear heating. The box structure includes plates to form the manifolds and stiffening ribs to withstand enormous electromagnetic load, coolant pressure and blanket internal (purge gas) pressure. A 1/2-scale partial model of the blanket box structure for the outboard side module near midplane is manufactured to estimate the fabrication technology, i.e. diffusion bonding by HIP (Hot Isostatic Pressing) and EBW (Electron Beam Welding) procedure. Fabrication accuracy is a key issue to manufacture first wall panel because bending deformation during HIP may not be small for a large size structure. Data on bending deformation during HIP was obtained by preliminary manufacturing of HIP elements. For the shield structure, it is necessary to reduce the welding strain and residual stress of the weldment to establish the fabrication procedure. Optimal shape of the parts forming the manifolds, welding locations and welding  More>>
Authors:
Hashimoto, Toshiyuki; Takatsu, Hideyuki; Sato, Satoshi [1] 
  1. Japan Atomic Energy Research Inst., Naka, Ibaraki (Japan). Naka Fusion Research Establishment; and others
Publication Date:
Jul 01, 1994
Product Type:
Technical Report
Report Number:
JAERI-Tech-94-009
Reference Number:
SCA: 700450; PA: JPN-94:012092; EDB-95:026558; SN: 95001319900
Resource Relation:
Other Information: PBD: Jul 1994
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ITER TOKAMAK; BREEDING BLANKETS; MOCKUP; MODULAR STRUCTURES; PERFORMANCE TESTING; FIRST WALL; STAINLESS STEELS; ELECTRON BEAM WELDING; 700450; BLANKETS AND COOLING SYSTEMS
OSTI ID:
10109235
Research Organizations:
Japan Atomic Energy Research Inst., Tokyo (Japan)
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Other: ON: DE95737184; TRN: JP9412092
Availability:
OSTI; NTIS; INIS
Submitting Site:
JPN
Size:
78 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Hashimoto, Toshiyuki, Takatsu, Hideyuki, and Sato, Satoshi. Development and trial manufacturing of 1/2-scale partial mock-up of blanket box structure for fusion experimental reactor. Japan: N. p., 1994. Web.
Hashimoto, Toshiyuki, Takatsu, Hideyuki, & Sato, Satoshi. Development and trial manufacturing of 1/2-scale partial mock-up of blanket box structure for fusion experimental reactor. Japan.
Hashimoto, Toshiyuki, Takatsu, Hideyuki, and Sato, Satoshi. 1994. "Development and trial manufacturing of 1/2-scale partial mock-up of blanket box structure for fusion experimental reactor." Japan.
@misc{etde_10109235,
title = {Development and trial manufacturing of 1/2-scale partial mock-up of blanket box structure for fusion experimental reactor}
author = {Hashimoto, Toshiyuki, Takatsu, Hideyuki, and Sato, Satoshi}
abstractNote = {Conceptual design of breeding blanket has been discussed during the CDA (Conceptual Design Activities) of ITER (International Thermonuclear Experimental Reactor). Structural concept of breeding blanket is based on box structure integrated with first wall and shield, which consists of three coolant manifolds for first wall, breeding and shield regions. The first wall must have cooling channels to remove surface heat flux and nuclear heating. The box structure includes plates to form the manifolds and stiffening ribs to withstand enormous electromagnetic load, coolant pressure and blanket internal (purge gas) pressure. A 1/2-scale partial model of the blanket box structure for the outboard side module near midplane is manufactured to estimate the fabrication technology, i.e. diffusion bonding by HIP (Hot Isostatic Pressing) and EBW (Electron Beam Welding) procedure. Fabrication accuracy is a key issue to manufacture first wall panel because bending deformation during HIP may not be small for a large size structure. Data on bending deformation during HIP was obtained by preliminary manufacturing of HIP elements. For the shield structure, it is necessary to reduce the welding strain and residual stress of the weldment to establish the fabrication procedure. Optimal shape of the parts forming the manifolds, welding locations and welding sequence have been investigated. In addition, preliminary EBW tests have been performed in order to select the EBW conditions, and fundamental data on built-up shield have been obtained. Especially, welding deformation by joining the first wall panel to the shield has been measured, and total deformation to build-up shield by EBW has been found to be smaller than 2 mm. Consequently, the feasibility of fabrication technologies has been successfully demonstrated for a 1m-scaled box structure including the first wall with cooling channels by means of HIP, EBW and TIG (Tungsten Inert Gas arc)-welding. (author).}
place = {Japan}
year = {1994}
month = {Jul}
}