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Guide Tube Manufacturing Method for Nuclear Fuel Rod Assemblies and Guide Tube Molding Mandrel and Guide Tube for Nuclear Fuel Rod Assemblies
Guide Tube Manufacturing Method for Nuclear Fuel Rod Assemblies and Guide Tube Molding Mandrel and Guide Tube for Nuclear Fuel Rod Assemblies
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机译:核燃料棒组件的导管制造方法以及核燃料棒组件的导管成型芯棒和导管
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摘要
Successive axially spaced sections of a tubular blank (22) are pressed against different axially spaced sections (18,19) and (20,21) of a mandrel (14), which is shifted axially between pressing steps, to produce a tube of uniform external diameter but whose wall thickness varies axially. Also claimed is mandrel (14) which is rotationally symmetrical and whose external diameter varies axially from section (16) to section (21). Also claimed is a guide tube for a nuclear fuel assembly and presenting axially spaced sections with different wall thicknesses but uniform external diameter connected by a section of progressively varying wall thickness longer than 100 mm.
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