Thermal cycling experiments on a 1 meter long divertor mock-up with a rigid support structure

Journal Article · Tue Dec 31 04:00:00 EST 1996 · Fusion Technology

OSTI ID:447381

Suzuki, Satoshi; Sato, Kazuyoshi; Araki, Masanori; Nakamura, Kazuyuki; Dairaku, Masayuki; Yokoyama, Kenji; Akiba, Masato ^[1]

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1. Japan Atomic Energy Research Inst., Ibaraki (Japan)

To evaluate the thermal fatigue behavior for the rigid support structure, a 1 m long divertor mock-up has been developed that consists of 36 armor tiles, soft copper (OFHC-Cu) heat sink, and an OFHC-Cu cooling tube. Thermal cycling experiment was performed in an area of 25 x 50 mm{sup 2} at an incident heat flux of 25 MW/m{sup 2} for a pulse duration of 10 s. As a result, a water leakage from the cooling tube between the heated armor tiles occurred at 1247th thermal cycle. In the SEM observation, the striation was clearly observed at the fracture surface of the cooling tube. The 3-D finite element for the simulation of the experiment was also performed, and the large strain amplitude was found at the heated side of the cooling tube. Thus, the fatigue cracking of the cooling tube could mainly be attributable to this large strain amplitude. 8 refs., 7 figs., 1 tab.

• OSTI ID: 447381
• Report Number(s): CONF-9606116--
• Journal Information: Fusion Technology, Journal Name: Fusion Technology Journal Issue: 3 Vol. 30; ISSN 0748-1896; ISSN FUSTE8
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
DEFORMATION
DIVERTORS
FABRICATION
FINITE ELEMENT METHOD
ITER TOKAMAK
MATERIALS TESTING
MOCKUP
NUMERICAL DATA
PLASMA IMPURITIES
SCANNING ELECTRON MICROSCOPY
STRESS ANALYSIS
SUPPORTS
THERMAL CYCLING