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    • 4. 发明授权
    • Method for weld repairing of structures in nuclear reactors
    • 核反应堆结构焊缝修复方法
    • US5674419A
    • 1997-10-07
    • US498485
    • 1995-07-05
    • Hiroo KoideYasumasa TamaiJunichiro MorisawaToshimi MatsumotoKeiichi Uraki
    • Hiroo KoideYasumasa TamaiJunichiro MorisawaToshimi MatsumotoKeiichi Uraki
    • G21C19/02B23K9/00B23K9/04B23K31/02
    • B23K31/02
    • Disclosed is a highly reliable weld repairing method to repair a crack defect in structures and apparatus inside pressure vessels of nuclear reactors, while preventing generation of new crack defects in the structures and apparatus during the repairing. These structures and apparatus are made of any of stainless steel and Ni-base alloys, and are irradiated with high energy corpuscular ray during operating period of the reactor. The repairing method includes the steps of eliminating a region of the structure or the apparatus including a portion having the crack defect, and executing spot welding at a surface of the region continuously or interruptedly in a manner so as to form a first welded layer in a manner that each of the spot welded spots is half-overlapped with adjacent welded spots. Additionally, welding for forming at least a second layer, on the first welded layer, so that the at least a second layer is not deeper than a weld penetration thickness of the first welded layer can be performed.
    • 公开了一种高度可靠的焊接修复方法,用于修复核反应堆压力容器内的结构和设备中的裂纹缺陷,同时防止在修复期间在结构和设备中产生新的裂纹缺陷。 这些结构和装置由不锈钢和镍基合金中的任何一种制成,并且在反应器运行期间被照射高能量红外线。 修复方法包括以下步骤:消除结构的区域或包括具有裂纹缺陷的部分的设备,并且以连续或间断的方式在该区域的表面上进行点焊以形成第一焊接层 每个点焊点与相邻焊接点半重叠的方式。 此外,可以进行在第一焊接层上形成至少第二层的至少第二层的焊接,使得至少第二层不比第一焊接层的焊接穿透厚度更深。