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1.发明授权
公开(公告)号：US4966746A
公开(公告)日：1990-10-30
申请号：US293158
申请日：1989-01-03
申请人： David L. Richardson , Jack P. Clark , Balasubramanian S. Kowdley , Peter M. Patterson , Richard W. Perry , Thurman D. Smith
发明人： David L. Richardson , Jack P. Clark , Balasubramanian S. Kowdley , Peter M. Patterson , Richard W. Perry , Thurman D. Smith
IPC分类号： G01N29/04 , G21C17/003 , G21C17/01
CPC分类号： G21C17/01 , G01N2291/0258 , G01N2291/044
摘要： In operation, the device is lowered with paired lines attached to both housing lugs but suspended under tension only from one line to one lug so that the streamline housing is vertically disposed. With the housing vertically disposed during lowering, obstacles can be avoided such as the guide rod for the steam separator and dryer as well as the feedwater and core spray spargers. When lowered to the vicinity of the ledge and cover plate to be inspected, the slack line is fished around any obstacle and thereafter placed under tension. The streamline housing is then lowered using both lines in a horizontal position so as to expose downwardly the pedestal and rubber foot. Lowering is completed with remote camera assistance. Sample sweeps with the ultrasound transducer of spaced apart sections of the cover plate weld are used for precise centering of the pedestal and rubber base with respect to the center of the cover plate. Repeatedly logging a longitudinal excursion of the ultrasound detector with indexed rotation of the housing permits scanning entirely around the weld of the cover plate. This enables remote ultrasound survey of the weld of the cover plate for stress corrosion cracking.
摘要翻译： 在操作中，装置被降下，成对的线连接到两个壳体凸耳，但是在张力下仅由一根线悬挂到一个凸耳，使得流线壳体垂直设置。 随着壳体在降低期间垂直设置，可以避免障碍物，例如用于蒸汽分离器和干燥器的导杆以及给水和核心喷雾器。 当下降到要检查的凸缘和盖板附近时，松弛线在任何障碍物周围被捕获，然后放置在张力下。 然后使用两条线在水平位置下降流线壳体，以向下暴露基座和橡胶脚。 通过远程摄像头协助完成降级。 使用覆盖板焊缝的间隔开的部分的超声波换能器进行样品扫描，用于相对于盖板的中心精确地对准基座和橡胶基座。 重复记录具有壳体的分度旋转的超声检测器的纵向偏移允许完全围绕盖板的焊缝进行扫描。 这允许对盖板的焊缝进行远程超声波测量以用于应力腐蚀开裂。
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2.发明授权Apparatus for ultrasonic examination of BWR shroud access cover plate retaining welds 失效用于超声波检查BWR护罩检修盖板保持焊缝的设备
公开(公告)号：US5009105A
公开(公告)日：1991-04-23
申请号：US476086
申请日：1990-02-07
申请人： David L. Richardson , Jack P. Clark , Balasubramanian S. Kowdley , Peter M. Patterson , Richard W. Perry , Thurman D. Smith
发明人： David L. Richardson , Jack P. Clark , Balasubramanian S. Kowdley , Peter M. Patterson , Richard W. Perry , Thurman D. Smith
IPC分类号： G21C17/01
CPC分类号： G21C17/01
摘要： An apparatus and process for the remote inspection for stress corrosion cracking of welded shut boiling water reactor shroud access cover plates is disclosed. The apparatus consists of a streamline housing having a top side with lugs for the attachment of lowering lines on either end of the housing. Medially of the streamline housing and projecting downwardly from the bottom of the streamline housing, there is provided a central rotating pedestal with a rubber base. The rotating pedestal and rubber base enable the entire housing to rest on and rotate relative to the pedestal and rubber base. A first motor interior of the housing rotates the housing at a bevel gear rigidly mounted to the central pedestal. A second motor rotates a threaded shaft driving a ball screw with an attached mount for an ultrasound transducer. The mount and transducer responsive to rotation of the ball screw traverse along the elongate dimension of the housing over an opening through the bottom of the housing. A focused ultrasound transducer passes above the metal to be inspected. This ultrasound transducer focuses the sound through the water at an oblique angle to and from the metal of the hatch cover plate for an ultrasonic examination for stress corrosion cracking.
摘要翻译： 公开了一种用于远程检查焊接闭合沸水反应堆护罩通道盖板的应力腐蚀开裂的装置和方法。 该装置由流线型壳体组成，其具有顶侧，其具有用于在壳体的任一端上附接下降线的凸耳。 在流线壳体的中部并且从流线壳体的底部向下突出，设置有具有橡胶基座的中心旋转基座。 旋转底座和橡胶底座可使整个外壳相对于底座和橡胶底座静止并旋转。 壳体的第一马达内部使壳体以刚性地安装到中心基座的锥齿轮旋转。 第二电动机使用驱动滚珠丝杠的螺纹轴旋转用于超声换能器的附接安装座。 响应于滚珠丝杠旋转的安装件和换能器沿着壳体的细长尺寸穿过穿过壳体底部的开口。 聚焦超声波换能器通过要检查的金属上方。 该超声波传感器将声音以与倾斜角度倾斜的角度对准来自舱口盖板的金属的超声波检查用于应力腐蚀开裂。
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公开(公告)号：US4818470A
公开(公告)日：1989-04-04
申请号：US91174
申请日：1987-08-31
IPC分类号： G21C17/003 , G01N29/04 , G01N29/265 , G21C17/00
CPC分类号： G01N29/265 , G01N2291/0258 , G01N2291/0421 , G01N2291/0422 , G01N2291/044 , G01N2291/2695
摘要： An apparatus for the remote examination of peripheral shroud hold down bolts on steam separators used in boiling water reactors is disclosed. The testing apparatus is used while the steam separator is in a holding pool. The testing apparatus includes a depending pole having attached at the bottom thereof an aluminum shoe. The shoe has a flat, upwardly exposed bottom and opens to one side at gathering surfaces to receive the lower ends of the shroud bolts. The upwardly exposed bottom of the shoe defines an aperture through which an upwardly exposed piezoelectric device is exposed for direct contact with the bottom of the bolt. An overlying clamp member is provided to clamp the lug onto the bottom of the shoe for testing. The clamp member defines a receiving slot to receive the shaft of the bolt immediately overlying the rectangular lug. The clamp member slides over the shaft at the slot into contact with the top of the lug. The clamp member clamps the lug end of the bolt securely onto the upwardly exposed piezoelectric device on the upwardly exposed bottom of the shoe. A piezoelectric ultrasonic test is then run from the bottom and radioactive portion of the bolt to and towards the top of the bolt. Testing for longitudinal sound waves, refracted sound waves and shear sound waves for inter granular stress corrosion cracking can occur despite the radioactive and remote under water location of the bolts.
摘要翻译： 公开了一种用于远程检查在沸水反应器中使用的蒸汽分离器上的外围护罩的紧固螺栓的装置。 当蒸汽分离器处于保持池中时，使用测试装置。 该测试装置包括一个固定极，其底部附着有一个铝制鞋。 鞋具有平坦的向上暴露的底部，并且在聚集表面处一侧开口以接收护罩螺栓的下端。 鞋的向上暴露的底部限定了一个孔，露出的向上露出的压电装置通过该孔与螺栓的底部直接接触。 提供了一个上覆的夹紧构件以将凸耳夹紧到鞋的底部以进行测试。 夹紧构件限定接收槽，以容纳立即覆盖矩形凸耳的螺栓的轴。 夹紧构件在槽处在轴上滑动以与凸耳的顶部接触。 夹紧构件将螺栓的凸耳端部牢固地夹紧在鞋的向上暴露的底部上的向上暴露的压电装置上。 然后，压电超声波测试从螺栓的底部和放射性部分延伸到螺栓的顶部并朝向螺栓的顶部。 尽管放射性和远程位于水下位置的螺栓，测试纵向声波，折射声波和晶粒间应力腐蚀开裂的剪切声波。
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公开(公告)号：US4826650A
公开(公告)日：1989-05-02
申请号：US49243
申请日：1987-05-13
IPC分类号： G01N29/04 , G01N29/26 , G21C17/003 , G21C17/00
CPC分类号： G21C17/003
摘要： In a boiling water reactor, an apparatus and process for ultrasound inspection of the top guide is disclosed. The top guide constitutes a lattice of stainless steel bars overlying the core plate and being assembled at confronting grooves with the lattice mounted at the side edges to the reactor pressure vessel. This lattice braces the upper ends of the vertically supported fuel assemblies in their requisite orientation and spaced apart relation to enable among other things the required spatial interval to be maintained for control rod moderation of the reaction. Because of the proximity of the top guide to the fuel assemblies, the individual bars making up the lattice need to be checked for cracking, especially that cracking produced by irradiation assisted stress crack corrosion. With a defined cell in the lattice emptied of its contained and adjoining fuel assemblies, there is disclosed an ultrasound test for cracking. A sound transducer on a first special frame sweeps horizontally across the top of a bar interrogating the bar with vertical ultrasound waves for detecting horizontal cracks. Similarly, a sound transducer on a second special frame sweeps vertically across the side of a bar interrogating the bar with angularly incident horizontal ultrasound waves for detecting vertical cracks. Nondestructive testing of the lattice assembly occurs without required disassembly.
摘要翻译： 在沸水反应器中，公开了一种用于顶部引导件的超声检查的装置和方法。 顶部导向件构成覆盖在芯板上的不锈钢棒的格子，并且组装在面对的槽处，格子在侧边缘安装到反应堆压力容器。 该格子以垂直支撑的燃料组件的上端以其所需的取向和间隔的关系来支撑，以使得能够维持所需的空间间隔以用于控制杆适度的反应。 由于顶部导向件与燃料组件的接近，需要检查构成格子的各个条是否有裂纹，特别是由辐射辅助应力裂纹腐蚀产生的裂纹。 利用在其包含和相邻的燃料组件中排空的格子中的限定单元，公开了用于开裂的超声波测试。 第一个特殊框架上的声音传感器横向扫过酒吧的顶部，用垂直超声波询问酒吧，以检测水平裂缝。 类似地，第二特殊框架上的声音传感器沿着询问棒的侧面垂直地扫掠，具有角度入射的水平超声波，用于检测垂直裂纹。 无需拆卸就可以进行格子组装的非破坏性测试。
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公开(公告)号：US4548785A
公开(公告)日：1985-10-22
申请号：US449651
申请日：1982-12-14
IPC分类号： G01N29/26 , G01N29/04 , G21C17/003 , G21C17/017 , G21C17/00
CPC分类号： G21C17/017
摘要： Apparatus for remotely controlled examination of the control rod drive penetration stub tubes in the wall of a nuclear reactor pressure vessel including a rotatable carriage on which is mounted a reciprocable shaft to which is attached an inspection instrument for scanning the stub tubes.
摘要翻译： 用于远程控制检查控制杆驱动穿透短管在核反应堆压力容器的壁中的装置，该核反应堆压力容器包括可旋转的托架，其上安装有可往复运动的轴，附接有用于扫描短管的检查仪器。
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公开(公告)号：US5465278A
公开(公告)日：1995-11-07
申请号：US247736
申请日：1994-05-23
CPC分类号： G21C17/00 , G21C5/10 , G21Y2002/204 , G21Y2004/30 , Y02E30/40
摘要： A method and an apparatus for measuring the degree of intergranular stress corrosion cracking protection in the area of the core shroud weldments. Electrochemical potential sensors are attached to the shroud wall and the upper core spray line at locations near the actual weld surface of concern to ensure the accuracy of the electrochemical potential measurements. A working electrode doped or coated with noble metal and a reference electrode are implanted into the reactor core shroud. A throughhole is drilled or machined into the shroud wall at an elevation just below the top guide support ring, i.e., near the core shroud weldments. Then a plug containing the working and reference electrodes is inserted into the throughhole.
摘要翻译： 一种用于测量核心护套焊件区域中的晶间应力腐蚀开裂保护程度的方法和装置。 电化学电位传感器在靠近实际焊接表面的位置处连接到护罩壁和上芯线喷涂线，以确保电化学电位测量的准确性。 将掺杂或涂覆有贵金属和参考电极的工作电极注入反应堆芯护罩中。 在刚好在顶部导向支撑环下方的高度处，即靠近核心护套焊件，在通孔壁上钻孔或加工通孔。 然后将含有工作电极和参比电极的插头插入到通孔中。
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公开(公告)号：US5030410A
公开(公告)日：1991-07-09
申请号：US579507
申请日：1990-09-10
IPC分类号： G21C17/06
CPC分类号： G21C17/06
摘要： A vacuum system for cleaning the base of a control blade guide tube comprises a vacuum source and a novel vacuum head. The vacuum source includes a conventional vacuum pump and filter, for trapping matter entrained in water driven by the pump. The vacuum head is disk-shaped and has an off-axis vacuum port which can scan the guide tube base when the disk is rotated 360.degree.. Elongated slots in the disk admit water down through the disk. Guide fins separate the slots from the vacuum port. The guide fins are shaped to provide a clearance over the guide tube base, effecting a highventuri action which helps sweep up debris on the guide tube base. An annular ridge on the disk surrounds a similar annular ridge on the base, isolating a control rod drive tube housing below the base from the vacuum. This prevents control rod drive components from being disturbed by the vacuum.
摘要翻译： 用于清洁控制叶片导管的基座的真空系统包括真空源和新颖的真空头。 真空源包括常规的真空泵和过滤器，用于捕获由泵驱动的水中夹带的物质。 真空头是圆盘形的，并且具有离轴真空口，当盘旋转360°时可以扫描导管底座。 磁盘中的细长插槽允许水通过磁盘。 引导片将插槽与真空端口分开。 引导翅片成形为在引导管基座上提供间隙，实现了高度的作用，其有助于清除导管基座上的碎屑。 盘上的环形脊围绕基座上的类似环形脊，将基座上的控制杆驱动管外壳与真空隔离。 这样可防止控制杆驱动部件受到真空的干扰。
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公开(公告)号：US4507840A
公开(公告)日：1985-04-02
申请号：US486524
申请日：1983-04-19
CPC分类号： G21C19/34 , Y10T29/49716 , Y10T29/49753
摘要： A method is disclosed for the compaction of control rod blades and fuel channels of a boiling water reactor. Upper and lower portions of a control rod blade are removed from a cruciform shaped main blade structure. Each elongate tubular fuel channel of substantially square cross section is sectioned into four substantially congruent panels. A plurality of panels are stacked into each quadrant of the main blade structure substantially parallel to the long axis thereof.
摘要翻译： 公开了用于压实沸水反应器的控制棒叶片和燃料通道的方法。 控制杆叶片的上部和下部从十字形主叶片结构上移除。 具有大致正方形截面的每个细长管状燃料通道被分成四个基本上一致的面板。 多个面板被堆叠到主叶片结构的基本上平行于其长轴的每个象限中。
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公开(公告)号：USD269599S
公开(公告)日：1983-07-05
申请号：US242203
申请日：1981-03-10
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公开(公告)号：US4675149A
公开(公告)日：1987-06-23
申请号：US824898
申请日：1986-01-31
申请人： Richard W. Perry , John Chang , Robert C. Dixon
发明人： Richard W. Perry , John Chang , Robert C. Dixon
CPC分类号： G21C19/00 , G21C15/25 , G21C19/207 , Y02E30/40
摘要： Repair apparatus and a method of repair utilized for securing pressure sensing lines to jet pump diffusers in boiling water nuclear reactors is disclosed. Conventional access is made to the reactor with removal of the jet pump inlet mixer to expose the upwardly disposed frustum-shaped diffuser. The diffuser includes a pressure sensing line mounted by a stand off block. It has been found that this pressure sensing line becomes separated from the diffuser due to vibration and accompanying metal fatigue. A repair is effected by introduction of an arcuate beam configured for live support at each end. This pressure sensing line and stand off block is bracketed by the upper end of a beam to register the line to the stand off block. The lower end of the beam brackets the line and stands off from the diffuser at a second introduced stand off block. The line is provided with two points of support to prevent further dislodging vibration. The beam is in turn captured by an elliptical ring clamp encircling the essentially circular section of the diffuser between the beam and its captured line. A saddle on the elliptical ring opposite the clamped beam tensions the ring diameter. The ring clamp fits in a preformed notch on the beam and is disposed normally to the surface of the diffuser from the saddle. This disposition of the ring urges the beam upwardly in latched engagement with the stand off block so as to position the line at the upper end of the beam to the stand off block. A universal beam holder for the remote clamping and release of the beam as well as universal manipulation of the beam in pitch, yaw and azimuth is disclosed. This universal beam holder enables positioning of the beam in the submerged radio-active environment of the reactor. The clamp also enables the beam to be maintained in position with the line and stand off block while the ring clamp captures the beam. When the ring clamp is fastened to the beam by securing of a wedge fitting at the saddle, the universal beam holder releases the beam and is withdrawn. Clamping of the pressure sensing line at two spaced apart points secures against both initial detachment and further vibration damage.
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