公开(公告)号：US11087894B2

公开(公告)日：2021-08-10

申请号：US16030894

申请日：2018-07-10

申请人： Commissariat A L'Energie Atomique et aux Energies Alternatives

发明人： Thierry Beck ,  Jean-Claude Garnier ,  Denis Lorenzo

IPC分类号： G21C9/016 ,  G21C5/10 ,  G21C1/02 ,  G21C3/322 ,  G21C13/06 ,  G21C3/335 ,  G21C3/334 ,  G21C3/326 ,  G21C3/30 ,  G21C1/32 ,  G21C1/03

摘要： A mitigation assembly for a nuclear reactor including a box with an upper portion forming the head of the assembly housing an upper neutron shielding device, including a head including removable lock and a slug installed free to move in translation relative over a given travel distance, the lock being configured such that locking/unlocking between the head and the box can be made by displacement of the slug with an extraction grab with its pawls attached in the slug. The lower part of the upper neutron shielding device includes a cone-shaped sealing block with the tip of the cone oriented downwards, cooperating with a cone-shaped internal surface of the box, a sealing device being formed between the two, the assembly created forming a removable sealing plug.

公开(公告)号：US20190019585A1

公开(公告)日：2019-01-17

申请号：US16030894

申请日：2018-07-10

申请人： Commissariat A L'Energie Atomique et aux Energies Alternatives

发明人： Thierry Beck ,  Jean-Claude Garnier ,  Denis Lorenzo

IPC分类号： G21C1/02 ,  G21C3/322 ,  G21C3/334 ,  G21C3/335 ,  G21C13/06

摘要： The main purpose of the invention is a mitigation assembly (40) for a nuclear reactor comprising a box (41) with an upper portion (41) forming the head of the assembly housing an upper neutron shielding (UNS) device, comprising a head (105) comprising removable locking means (100) and a slug (101) installed free to move in translation relative over a given travel distance, the locking means (100) being configured such that locking/unlocking between the head (105) and the box (41) can be made by displacement of the slug (101) by means of an extraction grab with its pawls attached in the slug (101), characterised in that the lower part of the upper neutron shielding device comprises a cone-shaped sealing block (107) with the tip of the cone oriented downwards, cooperating with a cone-shaped internal surface (108) of the box (41), a sealing device (109) being formed between the two, the assembly created forming a removable sealing plug (110).

公开(公告)号：US09685245B2

公开(公告)日：2017-06-20

申请号：US14307162

申请日：2014-06-17

申请人： Preferred Utilities Manufacturing Corporation

发明人： Bernard DeFazio, Jr.

IPC分类号： G21C1/22 ,  G21C19/02 ,  F01D25/24 ,  F16J13/06 ,  G21C13/06

CPC分类号： G21C19/02 ,  F01D25/243 ,  F16J13/06 ,  G21C13/06

摘要： A system, method and apparatus for remotely installing a flange cover assembly on a fuel transfer tube fixed flange in a containment pit in a nuclear power plant is presented. In one example, the flange cover assembly includes J-bolt spring assemblies in which the feet of the J-bolt are rotated between a clamping and non-clamping orientation to engage with the rear face of the fixed flange. A tool frame is lowered into the containment pit to engage with the flange cover assembly to compress the J-bolt springs and extend the J-bolt foot toward and away from the flange cover. Dual acting cylinders move a spring compression frame on the frame tool to compress and relax the J-bolt spring assemblies.

公开(公告)号：US5535253A

公开(公告)日：1996-07-09

申请号：US256302

申请日：1994-09-02

申请人： Francois Loisy ,  Jean-Luc Germain

发明人： Francois Loisy ,  Jean-Luc Germain

IPC分类号： G01M3/04 ,  G01M3/20 ,  G21C13/036 ,  G21C13/06 ,  G21C17/00 ,  G21C17/02

CPC分类号： G01M3/202 ,  G21C13/036 ,  G21C13/06 ,  G21C17/002 ,  Y02E30/40

摘要： The method and the device are applicable to the penetrations (2) of a pressurised water nuclear reactor vessel head (1) during operation.The device includes a double circuit for picking off two gas samples (100, 16, 17; 12, 13, 14, 15) and a measurement assembly (18) which regularly compares the content, especially of water vapour, in the two samples picked off. The first sample is taken from the volume of a chamber (7) where the possible leak (10) emerges, and the second in proximity to the head (1) outside the region immediately affected by the leak. The assembly (18) makes it possible to generate (19) an alarm in the event of a leak and to distinguish it from operational alarms.Techniques and means are also provided for determining the flow rate of sweeping in the volume of the chamber (7) and for checking the pick-off and detection systems.

摘要翻译： PCT No.PCT / FR93 / 01084第 371日期：1994年9月2日 102（e）1994年9月2日PCT PCT 1993年11月3日PCT公布。 公开号WO94 / 11882 日期：1994年5月26日。该方法和装置适用于运行期间加压水核反应堆容器头（1）的穿透（2）。 该设备包括用于拾取两个气体样品（100,16,17; 12,13,14,15）的双回路和测量组件（18），其定期地比较所拾取的两个样品中的含量，特别是水蒸汽的含量 关闭 第一个样品取自可能的泄漏（10）出现的腔室（7）的体积，第二个样品取自立即受渗漏影响的区域之外的头部（1）附近。 组件（18）可以在发生泄漏的情况下产生（19）报警，并将其与操作报警区分开来。 还提供了用于确定在室（7）的体积中扫掠的流量并用于检查传感器和检测系统的技术和手段。

公开(公告)号：US5245639A

公开(公告)日：1993-09-14

申请号：US837809

申请日：1992-02-18

申请人： Kenneth A. Martin

发明人： Kenneth A. Martin

IPC分类号： G21C13/06

CPC分类号： G21C13/06 ,  Y02E30/40

摘要： A plug assembly for plugging the flow hole of a core support barrel employs an offset arm for securing the plug to the core support barrel above the flow hole and the adjacent thermal shield. The disclosed embodiments do not require the cutting of an access opening through the thermal shield.

摘要翻译： 用于堵塞芯支撑筒的流动孔的插头组件使用偏移臂，用于将插头固定到位于流动孔和相邻热屏蔽之上的芯支撑筒上。 所公开的实施例不需要通过热屏蔽件切割进入开口。

公开(公告)号：US5217676A

公开(公告)日：1993-06-08

申请号：US497263

申请日：1990-03-22

申请人： Jean-Claude Morandiere

发明人： Jean-Claude Morandiere

IPC分类号： G21C13/02 ,  G21C13/028 ,  G21C13/06

CPC分类号： G21C13/06 ,  Y02E30/40

摘要： The plug (8) comprises a body in two parts (9, 10) in the form of flanges assembled together so as to be locked against rotation about their common axis and movable in axial translational motion relative to one another. A gasket (11) made of flexible material is inserted between the peripheral parts of the two flanges, and the flanges are axially clamped. The space (12) between the flanges (9, 10) can be evacuated before such clamping.

摘要翻译： 插头（8）包括以组合在一起的凸缘形式的两部分（9,10）的主体，以便被锁定以防止围绕其公共轴线旋转并且可相对于彼此以轴向平移运动。 由柔性材料制成的垫圈（11）插入在两个凸缘的周边部分之间，并且凸缘被轴向夹紧。 在这种夹紧之前，凸缘（9,10）之间的空间（12）可被抽真空。

公开(公告)号：US5196160A

公开(公告)日：1993-03-23

申请号：US855575

申请日：1992-03-23

申请人： Jan S. Porowski

发明人： Jan S. Porowski

IPC分类号： G21C13/036 ,  G21C13/06 ,  G21C21/00

CPC分类号： G21C21/00 ,  G21C13/036 ,  G21C13/06 ,  Y02E30/40

摘要： A process for improving nozzles extending substantially vertically through openings in the head of a nuclear reactor and which are circumferentially welded to the head through a weld lying on an inner surface of the head and on the adjacent outer surface of the nozzle which comprises forming a coaxial, circumferential groove upwardly into at least a portion of the nozzle extending into the reactor and then filling the coaxial, circumferential groove with a weld material. The nuclear reactor head is also claimed.

摘要翻译： 一种用于改进喷嘴的方法，该喷嘴基本垂直地延伸穿过核反应堆的头部中的开口，并且通过位于头部的内表面上和在喷嘴的相邻外表面上的焊接件周向焊接到头部，该焊接包括形成同轴 周向沟槽向上进入喷嘴延伸进入反应器的至少一部分，然后用焊接材料填充同轴的周向槽。 还要求核反应堆头。

公开(公告)号：US5171514A

公开(公告)日：1992-12-15

申请号：US650135

申请日：1991-02-01

申请人： Luciano Veronesi ,  Robert M. Wepfer

发明人： Luciano Veronesi ,  Robert M. Wepfer

IPC分类号： G21C13/06 ,  F16L55/136 ,  F22B37/22 ,  G21C13/067 ,  G21D1/00

CPC分类号： F16L55/136 ,  F22B37/222 ,  G21C13/067 ,  Y02E30/40

摘要： Apparatus for sealing the primary-side coolant flow nozzles of a nuclear steam generator. The steam generator has relatively small diameter manway openings for providing access to the interior of the steam generator including the inside surface of each nozzle, the manway openings having a diameter substantially less than the inside diameter of each nozzle. The apparatus includes a bracket having an outside surface for matingly sealingly engaging the inside surface of the nozzle. The bracket also has a plurality of openings longitudinally therethrough and a plurality of slots transversely therein in communication with each opening. A plurality of unitary plugs sized to pass through the manway opening are matingly sealingly disposed in each opening of the bracket for sealingly plugging each opening. Each plug includes a plurality of arms operable to engage the slots of the bracket for connecting each plug to the bracket, so that the nozzle is sealed as the plugs seal the openings and are connected to the bracket.

公开(公告)号：US5167905A

公开(公告)日：1992-12-01

申请号：US763385

申请日：1991-09-20

申请人： Raymond M. Mentz ,  Charles D. Hanna

发明人： Raymond M. Mentz ,  Charles D. Hanna

IPC分类号： G21C13/06 ,  F22B37/22 ,  G21C13/067

CPC分类号： G21C13/067 ,  F22B37/222 ,  Y02E30/40

摘要： Apparatus for sealing or blocking conduits, such as the primary nozzles of a nuclear steam generator. The invention includes an annular bracket sealingly attached to the rim of the open end of the nozzle, the bracket having a plurality of threaded holes therein. Mounted atop the bracket is a generally circular nozzle dam that includes a first side section hingedly pivotably connected to a second side section for allowing the nozzle dam to be foldable. Removably connected to each side section is a center section, the center section and the side sections defining the generally circular nozzle dam for covering the opening defined by the annular bracket. The periphery portions of the center section and of the side sections have bores therethrough. A plurality of threaded bolts extend through the bores in the nozzle dam and into the threaded holes in the bracket for removably bolting the nozzle dam to the bracket. Interposed between the nozzle dam and the bracket is an elastomeric extrusion-resistant seal member having a plurality of apertures through the periphery thereof for receiving each bolt. As the nozzle dam is bolted to the bracket, a compressive force will act perpendicularly on the seal member. This compressive force will tend to cause the apertures of the seal member to extrude laterally outwardly away from each bolt, thus enlarging the aperture surrounding each bolt. Thus, the seal member is configured to effectively seal an imperfect seal surface and to resist extrusion such as by having laminated layers of differing hardnesses, so that the seal member will not laterally extrude away from each bolt in a manner that enlarges the aperture surrounding each bolt as the nozzle dam is tightly bolted to the bracket. The extrusion-resistant feature of the seal member provides a nozzle dam that is fluid-tight because the aperture is not enlarged.

摘要翻译： 用于密封或堵塞管道的装置，例如核蒸汽发生器的主喷嘴。 本发明包括密封地附接到喷嘴的开口端的边缘的环形支架，支架在其中具有多个螺纹孔。 安装在托架顶部的是大致圆形的喷嘴坝，其包括铰接地可枢转地连接到第二侧部的第一侧部分，用于允许喷嘴坝可折叠。 可拆卸地连接到每个侧部分是中心部分，中心部分和侧部限定用于覆盖由环形支架限定的开口的大致圆形的喷嘴坝。 中心部分和侧部分的周边部分具有穿过其中的孔。 多个螺纹螺栓延伸穿过喷嘴槽中的孔并且延伸到支架中的螺纹孔中，以将喷嘴坝可拆卸地螺栓固定在支架上。 喷嘴坝和支架之间插入有弹性体挤压密封构件，其具有穿过其周边的多个孔，用于容纳每个螺栓。 当喷嘴坝被螺栓连接到支架上时，压缩力将垂直地作用在密封构件上。 这种压缩力将倾向于导致密封构件的孔横向向外挤出远离每个螺栓，从而扩大围绕每个螺栓的孔。 因此，密封构件被构造成有效地密封不完美的密封表面并且抵抗挤出，例如通过具有不同硬度的层压层，使得密封构件将不会以扩大围绕每个螺栓的孔的方式从每个螺栓横向拉伸 螺栓，因为喷嘴坝紧紧地螺栓固定在支架上。 密封构件的抗挤压特征提供了一个流体密封的喷嘴坝，因为孔没有扩大。

公开(公告)号：US5048570A

公开(公告)日：1991-09-17

申请号：US854359

申请日：1986-04-21

申请人： Eric M. Weisel ,  Glen E. Schukei

发明人： Eric M. Weisel ,  Glen E. Schukei

IPC分类号： G21C15/00 ,  F16L55/132 ,  F22B37/22 ,  G21C13/06

CPC分类号： F22B37/222 ,  F16L55/132

摘要： A multisectioned nozzle dam (30) for use in a steam generator (24) with an integral bolt ring (32) has a body structure of general circular shape. Redundant seals including at least three separate inflatable peripheral seals (48, 50 and 52) with an alarm (A) for indicating a pressure increase between the second and third seals (50 and 52) is provided. Redundant supports including a plurality of independent bars (60, 62, 64 and 66) bolted to the integral bolt ring (36) secure the dam (30) within the nozzle (26) to the appropriate axial position.

摘要翻译： 用于具有一体式螺栓环（32）的蒸汽发生器（24）中的多段喷嘴坝（30）具有一般圆形的主体结构。 提供冗余密封件，其包括至少三个单独的可充气外围密封件（48,50和52），其具有用于指示第二和第三密封件（50和52）之间的压力增加的报警器（A）。 螺栓连接到整体式螺栓环（36）上的多个独立的杆（60,62,64和66）的冗余支撑件将喷嘴（26）内的挡板（30）固定到适当的轴向位置。