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Title:
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TIG rewelding facility in ECN Hot Cell Laboratory: installation, first experiments and optimisations NET deliverable PSM1 GB5 ECN-2 en GB6 ECN-1
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Author(s):
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Published by:
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Publication date:
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ECN
NUCLEAIR
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1998
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ECN report number:
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Document type:
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ECN-C--98-044
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ECN publication
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Number of pages:
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Full text:
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32
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Download PDF
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Abstract:
Austenitic stainless steel AISI316L(N) will be used as the mainconstruction material for ITER, the Next Step Fusion Device. During service,
components will have to be replaced and welding will be part of the repair
procedures. However, welding of neutron irradiated steel is known to be
problematic. This is probably caused by helium, which is formed due to
transformation reactions in the steel, which would cause cracking in or near
the weld by the formation and growth of helium bubbles, especially when high
heat inputs are used. This report describes the Tungsten Inert Gas (TIG)
welding (also known as Gas Tungsten Arc Welding or GTAW) facility developed
for welding experiments on irradiated steels. The installation in a shielded
cell in the ECN Hot Cell Laboratory is described, and the results of test
welds and optimization of welding parameters on AIS1316L plate material are
discussed. The TIG facility is shown to work properly in the Hot Cell
environment. Parameters for the welding of AISI316L plates were determined
and welds with good metallurgical quality were made. 2 refs.
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