Apparatus for magnetically detecting degradation of metal material using
superconductor sensor system and reference material data comparison
    1.
    发明授权
    Apparatus for magnetically detecting degradation of metal material using superconductor sensor system and reference material data comparison 失效
    使用超导传感器系统和参考材料数据比较来磁性检测金属材料退化的装置

    公开(公告)号:US5134368A

    公开(公告)日:1992-07-28

    申请号:US611426

    申请日:1990-11-08

    IPC分类号: G01N17/00 G01N27/72

    摘要: On the basis of a finding that a magnetic hysteresis of a metal material, among magnetization characteristics changing with secular degradation of the metal material, shows a clear correspondence with the degree of degradation of the metal material, a change in such a magnetization characteristic is measured to estimate the degree of secular degradation of the metal material. In a typical embodiment, a superconducting quantum interference device is used to detect the magnetization characteristic of a measuring object. According to the present invention, the degree of embrittlement of a metal material used in an environment of high temperatures can be quickly detected in a non-destructive fashion so that the danger of brittle fracture of the metal material can be reliably prevented.

    摘要翻译: 基于金属材料的磁滞特性随着金属材料的长期劣化而变化的磁化特性与金属材料的劣化程度明显对应的结果,测量了这种磁化特性的变化 以估计金属材料的长期退化程度。 在典型的实施例中,超导量子干涉装置用于检测测量对象的磁化特性。 根据本发明,可以以非破坏性的方式快速地检测在高温环境中使用的金属材料的脆化程度,从而可以可靠地防止金属材料脆性断裂的危险。

    Method of maintaining housing of reactor pressure vessel and heat
treatment equipment therefor
    4.
    发明授权
    Method of maintaining housing of reactor pressure vessel and heat treatment equipment therefor 失效
    维护反应堆压力容器及其热处理设备的方法

    公开(公告)号:US5329099A

    公开(公告)日:1994-07-12

    申请号:US704289

    申请日:1991-05-22

    摘要: A method of maintaining the housing of a reactor pressure vessel having: a reactor pressure vessel into which cooling water is introduced; a cylindrical housing which penetrates an end bracket of the reactor pressure vessel; and a circumferential weld for securing the intermediate portion of the housing to the reactor pressure vessel by welding, the method of maintaining a housing of a reactor pressure vessel comprising the steps of: remaining the cooling water in the reactor pressure vessel; preventing leakage of the cooling water in the reactor pressure vessel through the housing by sealing the housing; making the inside portion of the housing lower than the seal to be a hollow space of a gas atmosphere; heating a heat affected zone due to welding by using a heating device inserted into the hollow space from a lower portion so as to compressive-yield the inner surface of the housing in the heat affected portion upper than the circumferential weld and tensile-yield the outer surface; and cooling heated portion inside of the housing, which has been yielded, so as to tensile-yield the inner surface of the housing by using a cooling device inserted into the housing from a lower portion, whereby compressive stress is allowed to remain in the tensile-yielded portion.

    摘要翻译: 一种维持反应堆压力容器的壳体的方法,该反应堆压力容器具有:引入冷却水的反应堆压力容器; 圆柱形壳体,其穿过反应堆压力容器的端部支架; 以及用于通过焊接将壳体的中间部分固定到反应堆压力容器的圆周焊缝,保持反应堆压力容器的壳体的方法,包括以下步骤:在反应堆压力容器中保留冷却水; 防止反应堆压力容器内的冷却水通过密封壳体而通过壳体泄漏; 使壳体的内部低于密封件成为气体气氛的中空空间; 通过使用从下部插入到中空空间中的加热装置来加热受热影响区域,以便在高于周向焊缝的热影响部分中压缩屈服于壳体的内表面并拉伸屈服外侧 表面; 以及已经产生的壳体内部的冷却加热部分,以便通过使用从下部插入到壳体中的冷却装置来拉伸屈服壳体的内表面,由此使压缩应力保持在拉伸 硬部分。

    Method and apparatus for predicting deterioration of a member
constituting a part of equipment
    5.
    发明授权
    Method and apparatus for predicting deterioration of a member constituting a part of equipment 失效
    用于预测构成设备的一部分的部件的劣化的方法和装置

    公开(公告)号:US4987367A

    公开(公告)日:1991-01-22

    申请号:US406366

    申请日:1989-09-12

    摘要: Measurement of a physical property such as coercive force of a member to be inspected is performed at a plurality of locations in one region of the member. Similar measurement is performed in a plurality of different regions of the member and a maximum or minimum value (extreme value) is determined for each of the regions. On the basis of the extreme values thus determined, a recurrence period is determined in accordance with an extreme value statistic theory with the aid of a computer, whereon an estimated maximum value of the physical property of the member as a whole is determined from the recurrence period. On the basis of the estimated maximum value, the degree of deterioration of the member is predicted by the computer by consulting the data indicating the previously determined relation between the physical property and the degree of deterioration.

    摘要翻译: 在被检查部件的一个区域中的多个位置处进行诸如被检查部件的矫顽力的物理性能的测量。 在成员的多个不同区域中执行类似的测量,并且为每个区域确定最大值或最小值(极值)。 根据这样确定的极值,根据极值统计理论借助于计算机确定复发周期,从计算机估计整体成员的物理财产的最大值,从复发确定 期。 基于估计的最大值,通过咨询表示先前确定的物理性质和劣化程度的关系的数据,由计算机预测成员的劣化程度。

    Method and apparatus for detecting cracks
    7.
    发明授权
    Method and apparatus for detecting cracks 失效
    检测裂纹的方法和装置

    公开(公告)号:US4764970A

    公开(公告)日:1988-08-16

    申请号:US852313

    申请日:1986-04-15

    IPC分类号: G01N27/20 G06K9/00

    CPC分类号: G01N27/20

    摘要: The invention scans potential measurement terminals on the surface of a structural member to measure a potential distribution on the surface, detects the direction of a crack from the potential distribution and determining a detailed potential distribution in the direction of the crack thus detected. This potential distribution is compared with master curves of the potential distributions of cracks of various shapes, that have been obtained by analysis in advance, in order to detect the shape of the crack. The present invention can detect accurately a crack shape.

    摘要翻译: 本发明扫描结构构件表面上的潜在测量端子以测量表面上的电位分布,从电位分布检测裂纹的方向,并确定在所检测的裂纹方向上的详细电势分布。 将该电位分布与通过预先分析获得的各种形状的裂纹的电位分布的主曲线进行比较,以便检测裂纹的形状。 本发明可以准确地检测裂纹形状。

    Method of and apparatus for water-jet peening
    9.
    发明授权
    Method of and apparatus for water-jet peening 失效
    喷水喷丸的方法和装置

    公开(公告)号:US5305361A

    公开(公告)日:1994-04-19

    申请号:US8718

    申请日:1993-01-25

    摘要: A water jet peening method in which a pressurized water jet flow containing cavities is jetted through a nozzle having a velocity increasing orifice portion and a horn-like jetting hole formed continuously with the velocity increasing orifice portion to impinge against a surface of a metallic material immersed in water and to cause the cavities to collapse at the surface of the metallic member, and a tensile plastic deformation is caused in a surface layer of the metallic material by a local high pressure generated by the impingement and the collapse so that a residual tensile stress in the surface of the metallic member is reduced. In this method, the nozzle is vibrated so that vibration-induced cavities are formed in the vicinity of a nozzle wall surface, and the vibration-induced cavities are caused to impinge against the surface of the metallic member by the pressurized water jet flow containing cavities. It is thereby possible to promote the generation of cavities even in a case where pure water existing in a nuclear reactor and scant of nuclei from which cavities will be generated is used in peening of an internal structual member of the reactor.

    摘要翻译: 一种喷水喷丸法,其中通过具有速度增加孔部分的喷嘴喷射含有空腔的加压水射流,并且与增速孔部分连续形成的喇叭形喷射孔冲击浸入金属材料的表面 并导致空腔在金属构件的表面处塌陷,并且通过由冲击和塌陷产生的局部高压在金属材料的表面层中引起拉伸塑性变形,使得残余拉伸应力 在金属构件的表面减少。 在该方法中,喷嘴被振动,使得在喷嘴壁表面附近形成振动引起的空腔,并且使振动引起的空腔通过包含加压水射流的空腔与金属构件的表面碰撞 。 因此,即使在核反应堆中存在的纯水和将产生空腔的细小核的情况下,也可以促进空腔的产生,从而在反应器的内部结构构件的喷丸处理中使用。