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Structural design of cryostat and port penetration of international thermonuclear experimental reactor (ITER)

Technical Report:

Abstract

Preliminary structural design of the ITER cryostat and port penetration based on concrete cryostat was conducted and the structural concept compatible with remote handling and nuclear shielding is proposed. The ITER cryostat was mainly composed of side wall, upper cover, upper port, horizontal port, vacuum port, cooling pipe penetration. The upper cover is designed to be fully detachable structure by remote handling for assembling/disassembling the poloidal field coils. In addition, the upper cover provides the biological shield for personal access for the blanket maintenance operation. The upper port is designed to meet the requirements of cooling pipe penetration, blanket maintenance and biological shield. The layout of the cooling pipe is defined by simple thermal stress analysis. There are 16 horizontal ports arranged around the cryostat to provide the access of heating and current drive system, fuel injection, blanket test modules, vacuum pump and remote handling manipulators. Each port should have the biological shield and bellows to prevent an excessive thermal stress due to thermal expansion. These bellows are non-circular cross-section and the reinforced structure to prevent buckling is proposed. A partial model of the seal mechanism applicable to large gate valves connected to the horizontal ports was fabricated and the  More>>
Authors:
Sawa, Masafumi; Kanamori, Naokazu; Shimizu, Katsuhiro; Nomura, Yukio; Ohkawa, Yoshinao; Shibanuma, Kiyoshi; Tada, Eisuke [1] 
  1. Japan Atomic Energy Research Inst., Naka, Ibaraki (Japan). Naka Fusion Research Establishment
Publication Date:
Jul 01, 1992
Product Type:
Technical Report
Report Number:
JAERI-M-92-094
Reference Number:
SCA: 700450; PA: JPN-92:011188; SN: 93000918593
Resource Relation:
Other Information: PBD: Jul 1992
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ITER TOKAMAK; CRYOSTATS; FEASIBILITY STUDIES; BELLOWS; DESIGN; VACUUM SYSTEMS; 700450; BLANKETS AND COOLING SYSTEMS
OSTI ID:
10111209
Research Organizations:
Japan Atomic Energy Research Inst., Tokyo (Japan)
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Other: ON: DE93753267; TRN: JP9211188
Availability:
OSTI; NTIS; INIS
Submitting Site:
JPN
Size:
110 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Sawa, Masafumi, Kanamori, Naokazu, Shimizu, Katsuhiro, Nomura, Yukio, Ohkawa, Yoshinao, Shibanuma, Kiyoshi, and Tada, Eisuke. Structural design of cryostat and port penetration of international thermonuclear experimental reactor (ITER). Japan: N. p., 1992. Web.
Sawa, Masafumi, Kanamori, Naokazu, Shimizu, Katsuhiro, Nomura, Yukio, Ohkawa, Yoshinao, Shibanuma, Kiyoshi, & Tada, Eisuke. Structural design of cryostat and port penetration of international thermonuclear experimental reactor (ITER). Japan.
Sawa, Masafumi, Kanamori, Naokazu, Shimizu, Katsuhiro, Nomura, Yukio, Ohkawa, Yoshinao, Shibanuma, Kiyoshi, and Tada, Eisuke. 1992. "Structural design of cryostat and port penetration of international thermonuclear experimental reactor (ITER)." Japan.
@misc{etde_10111209,
title = {Structural design of cryostat and port penetration of international thermonuclear experimental reactor (ITER)}
author = {Sawa, Masafumi, Kanamori, Naokazu, Shimizu, Katsuhiro, Nomura, Yukio, Ohkawa, Yoshinao, Shibanuma, Kiyoshi, and Tada, Eisuke}
abstractNote = {Preliminary structural design of the ITER cryostat and port penetration based on concrete cryostat was conducted and the structural concept compatible with remote handling and nuclear shielding is proposed. The ITER cryostat was mainly composed of side wall, upper cover, upper port, horizontal port, vacuum port, cooling pipe penetration. The upper cover is designed to be fully detachable structure by remote handling for assembling/disassembling the poloidal field coils. In addition, the upper cover provides the biological shield for personal access for the blanket maintenance operation. The upper port is designed to meet the requirements of cooling pipe penetration, blanket maintenance and biological shield. The layout of the cooling pipe is defined by simple thermal stress analysis. There are 16 horizontal ports arranged around the cryostat to provide the access of heating and current drive system, fuel injection, blanket test modules, vacuum pump and remote handling manipulators. Each port should have the biological shield and bellows to prevent an excessive thermal stress due to thermal expansion. These bellows are non-circular cross-section and the reinforced structure to prevent buckling is proposed. A partial model of the seal mechanism applicable to large gate valves connected to the horizontal ports was fabricated and the basic performance under cyclic loading has been investigated. As a whole, the design concept of the cryostat and port penetration has been successfully developed and more detailed analysis and critical technology development will be conducted in the Engineering Design Phase. (author).}
place = {Japan}
year = {1992}
month = {Jul}
}