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Core shroud, in particular for cladding a reactor core in a boiling-water nuclear reactor and a method for repairing a core shroud
Core shroud, in particular for cladding a reactor core in a boiling-water nuclear reactor and a method for repairing a core shroud
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机译:堆芯护罩,特别是用于包覆沸水核反应堆中的反应堆堆芯的方法以及堆芯护罩的修复方法
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摘要
Core shrouds are conventionally welded together from cylindrical parts and annular flanges, wherein cracks have recently occurred in the region of weld seams in reactors of the boiling-water type. A core shroud, in particular for cladding a reactor core in a boiling-water nuclear reactor and a method for repairing a core shroud, include recesses disposed transversely relative to the circumferentially extending weld seams. The recesses have a middle part which passes through a region that is thermally influenced during welding as well as transverse grooves or widenings located in front of ends of the middle part and lying outside the thermally influenced region. A clamp which is fitted into the recess is disposed approximately flush with a shroud surface and is wedged in one of the transverse grooves.
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