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    METHOD AND APPARATUS FOR A JET PUMP THREE POINT SLIP JOINT CLAMP
    21.
    发明申请
    METHOD AND APPARATUS FOR A JET PUMP THREE POINT SLIP JOINT CLAMP 有权
    喷射泵三点滑动接头夹具的方法和装置

    公开(公告)号：US20120170704A1

    公开(公告)日：2012-07-05

    申请号：US12982280

    申请日：2010-12-30

    Applicant: Robin D. Sprague ,  Bret E. Nelson

    Inventor： Robin D. Sprague ,  Bret E. Nelson

    IPC: G21C15/25

    CPC classification number: G21C13/032 ,  G21C15/25 ,  Y02E30/31

    Abstract: A method and apparatus for providing a Boiling Water Reactor (BWR) jet pump three point slip joint clamp to mitigate sleep joint leakage flow induced vibration of a BWR jet pump assembly. A collar, provided as one seamless component or in separate portions, is installed on the upper crown of a diffuser. The collar includes a lower set of fasteners and an upper set of fasteners that contact the inlet mixer and diffuser, respectively, to horizontally stabilize the inlet mixer in a fixed position inside of the diffuser. The upper fasteners may be anchored by bosses that ensure a light-weight design of the collar. An optional cantilevered seal (including a cantilevered overhang and a lip) may mitigate leakage from the slip joint interface.

    Abstract translation: 一种用于提供沸水反应堆（BWR）喷射泵三点滑动接头夹以减轻BWR喷射泵组件的睡眠接头泄漏流引起的振动的方法和装置。 提供为一个无缝部件或分开的部分的轴环安装在扩散器的上冠上。 套环包括下一组紧固件和一组紧固件，其分别接触入口混合器和扩散器，以将入口混合器水平地稳定在扩散器内部的固定位置。 上部紧固件可以由凸起锚定，以确保衣领的轻量化设计。 可选的悬臂密封（包括悬臂悬臂和唇缘）可以减轻滑动接头界面的泄漏。

    Methods and apparatus for performing jet pump riser pipe repairs
    22.
    发明授权
    Methods and apparatus for performing jet pump riser pipe repairs 失效
    执行喷气泵提升管修理的方法和装置

    公开(公告)号：US6086120A

    公开(公告)日：2000-07-11

    申请号：US985528

    申请日：1997-12-05

    Applicant: Gerald A. Deaver ,  Siamak Bourbour

    Inventor： Gerald A. Deaver ,  Siamak Bourbour

    IPC: F04F5/44 ,  F16B2/06 ,  F16L1/00 ,  F16L43/02 ,  G21C15/25 ,  G21C19/02 ,  F16L3/10

    CPC classification number: G21C15/25 ,  G21Y2002/303 ,  G21Y2002/40 ,  G21Y2004/501 ,  Y02E30/40 ,  Y10T403/4611

    Abstract: Methods and apparatus for supporting the lower riser assembly of a jet pump in a reactor pressure vessel (RPV) of a nuclear reactor are described. In one embodiment of the apparatus, the clamp apparatus facilitates applying compression force on the elbow. The clamp apparatus includes a lower elbow clamp, a riser clamp, and a bridge. The lower elbow clamp is positioned adjacent an interface between the elbow and the thermal sleeve of the jet pump riser pipe assembly. The riser clamp is secured to the riser pipe of the jet pump riser pipe assembly at a location adjacent an interface between the riser pipe and the elbow. The bridge rigidly couples the lower elbow clamp and the lower clamp so that as the respective clamps are secured to the lower riser assembly, a compression clamping force is placed on the piping and welds at each clamp.

    Abstract translation: 描述了用于在核反应堆的反应堆压力容器（RPV）中支撑喷射泵的下部提升管组件的方法和装置。 在装置的一个实施例中，夹紧装置有助于在肘部上施加压力。 夹紧装置包括下弯头夹，立管夹和桥。 下肘夹位于喷气泵提升管组件的弯头和热套筒之间的界面附近。 提升管夹在与提升管和肘部之间的界面相邻的位置处固定到喷射泵提升管组件的提升管。 桥接器刚性地连接下弯头夹和下夹具，使得当相应的夹具固定到下提升管组件时，压缩夹紧力被放置在管道上并在每个夹具处焊接。

    Jet pump beam holder/positioner tool
    23.
    发明授权
    Jet pump beam holder/positioner tool 失效

    公开(公告)号：US4675149A

    公开(公告)日：1987-06-23

    申请号：US824898

    申请日：1986-01-31

    Applicant: Richard W. Perry ,  John Chang ,  Robert C. Dixon

    Inventor： Richard W. Perry ,  John Chang ,  Robert C. Dixon

    IPC: G21C15/25 ,  G21C19/00

    CPC classification number: G21C19/00 ,  G21C15/25 ,  G21C19/207 ,  Y02E30/40

    Abstract: 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.

    Reactor jet pump plugs
    24.
    发明授权
    Reactor jet pump plugs 失效
    反应器喷射泵塞

    公开(公告)号：US4043705A

    公开(公告)日：1977-08-23

    申请号：US634426

    申请日：1975-11-24

    Applicant: Vernon I. Schlosser

    Inventor： Vernon I. Schlosser

    IPC: F04F5/44 ,  G21C15/25 ,  F04F5/00

    CPC classification number: G21C15/25 ,  F04F5/44 ,  Y02E30/31

    Abstract: The invention provides a tool for closing off the jet nozzles of jet pumps located in an almost inaccessible location inside the shell of a boiling water reactor. The tool suspended on a cord is lowered down through a narrow gap extending down along the major part of the shell of the reactor, a distance of approximately 30 feet. The tool is lowered onto a stationary projection--namely, a lug or ear--which provides a gauge point for height and lateral position and an anchorage for torque in a horizontal plane. With these two controls for the tool of the invention, a closure for the jet nozzle may be applied to each of the jet nozzles to close them off against outflow of the water contained in the shell of the reactor thereby avoiding the bleak alternative of taking the reactor completely out of service, which includes removing the fuel bundles and draining the shell.

    Abstract translation: 本发明提供了一种用于关闭位于沸水反应器壳体内几乎不可接近的位置的喷射泵的喷嘴的工具。 悬挂在绳索上的工具沿着沿着反应堆壳体的主要部分向下延伸的窄间隙向下降低约30英尺的距离。 该工具下降到固定的突起上，即一个凸耳或耳朵，其提供高度和横向位置的测量点以及在水平面中的扭矩的锚固。 利用用于本发明的工具的这两个控制装置，用于喷嘴的封闭件可以施加到每个喷嘴以将其关闭以防止容纳在反应器的壳体中的水的流出，从而避免了采取 反应器完全停止使用，其中包括拆除燃料束并排出壳体。

    MULTI-MODE HEAT REMOVAL SYSTEMS FOR NUCLEAR REACTORS AND METHODS OF USING THE SAME
    26.
    发明公开
    MULTI-MODE HEAT REMOVAL SYSTEMS FOR NUCLEAR REACTORS AND METHODS OF USING THE SAME 审中-公开

    公开(公告)号：US20240304347A1

    公开(公告)日：2024-09-12

    申请号：US18662343

    申请日：2024-05-13

    Applicant: GE-Hitachi Nuclear Energy Americas LLC

    Inventor： David H. Hinds ,  Charles L. Heck

    IPC: G21C15/18 ,  G21C15/24 ,  G21C15/25 ,  G21C15/257

    CPC classification number: G21C15/182 ,  G21C15/24 ,  G21C15/25 ,  G21C15/257

    Abstract: Piping loops can carry either forced or natural circulation coolant flow from and back to a reactor depending on reactor and coolant state, and can transition between the two. The loop flows into a heat exchanger that significantly cools the coolant and may even condense the coolant. The heat exchanger can drive natural circulation coolant flow, and a pump on the loop can drive forced circulation. Coolant direction may be reversed through the heat exchanger in different modes. Loops may be installed directly on existing ICSs, come off of a primary loop generating electricity commercially, or be their own loop around and penetrations to the reactor. Actuation valves may isolate and actuate the system merely by disallowing or allowing coolant flow. Different flow modes and coolant direction may be similarly achieved by pump actuation and/or valve opening/closing. Beyond the pump and simple valve actuation, loops may be entirely passive.

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