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91. 发明授权

US10692610B2 Method of controlling pressure in a fuel rod 有权
公开(公告)号：US10692610B2
公开(公告)日：2020-06-23
申请号：US15559936
申请日：2016-03-23
申请人： Westinghouse Electric Sweden AB
发明人： Thomas Rostvall , Pontus Löf Helmersson
IPC分类号： G21C3/10 , G01L11/02 , G21C17/06 , G21C21/02 , G21F7/047 , G01L7/00
摘要： A method and a system includes controlling and monitoring the gas pressure in a nuclear fuel rod during filling of the fuel rod with a gas, and subsequent sealing of the fuel rod. The system includes a control unit and a length measuring system, which control unit is communicatively connected to the length measuring system. The length measuring system is configured to monitor the length of the fuel rod, and the control unit is configured to receive measurements from the length measuring system and to determine the gas pressure inside the fuel rod on the basis of variations of the length of the fuel rod. The method includes positioning an open first end of the fuel rod inside a pressure chamber, allowing gas to enter the fuel rod; pressurizing the gas in the pressure chamber at a first pressure level; closing the fuel rod; and sealing the fuel rod.

92. 发明授权

US10361007B2 Method of making a nuclear fuel pellet for a nuclear power reactor 有权
公开(公告)号：US10361007B2
公开(公告)日：2019-07-23
申请号：US15509037
申请日：2015-04-24
申请人： WESTINGHOUSE ELECTRIC SWEDEN AB
发明人： Hans Widegren
IPC分类号： G21C21/02 , G21C3/04 , G21C3/62 , G21C3/334
摘要： A method of making a nuclear fuel pellet for a nuclear power reactor. The method includes: providing a nuclear fuel material in powder form, pressing the powder such that a green pellet is obtained; providing a liquid that comprises an additive which is to be added to the green pellet; contacting the green pellet with the liquid so the liquid, with the additive, penetrates into the pellet; and sintering the treated green pellet. The additive is such that larger grains in the nuclear fuel material are obtained with the additive.

93. 发明申请

US20180182499A1 Core Plate Assembly, and a Method of Performing Work on a Core Plate Assembly 审中-公开
公开(公告)号：US20180182499A1
公开(公告)日：2018-06-28
申请号：US15801736
申请日：2017-11-02
申请人： Westinghouse Electric Sweden AB
发明人： Sven PERZON , Yann LE MOIGNE , Henrik REMAHL , Tobias STRÖMGREN
IPC分类号： G21C1/08 , G21C3/322 , G21C3/326 , G21C3/12 , G21C7/32
摘要： A core plate assembly for a boiling water reactor, and a method of performing work thereon are disclosed. The core plate assembly comprises a core plate having through-going apertures, and a beam structure comprising parallel first beams and parallel second beams being perpendicular to the first beams. The beams enclose a plurality of rectangular areas each enclosing four of the through-going apertures. Control rod guide tubes are aligned with a respective one of the through-going apertures. A transition pieces is received in a respective one of the control rod guide tubes, and has four passages for communicating with a respective fuel assembly. Each passage permits a coolant flow into the respective fuel assembly. A flow inlet is provided for the coolant into each passage. At least one of the flow inlets has a cross-sectional shape deviating from a circular shape.

94. 发明申请

US20170330637A1 FUEL ASSEMBLY FOR A NUCLEAR BOILING WATER REACTOR 审中-公开
公开(公告)号：US20170330637A1
公开(公告)日：2017-11-16
申请号：US15513711
申请日：2015-09-17
申请人： WESTINGHOUSE ELECTRIC SWEDEN AB
发明人： Uffe BERGMANN , Jonas AURÉN , Lars-Erik JOHANSSON
IPC分类号： G21C3/322 , G21C3/326 , G21C3/328 , G21C3/34 , G21C19/10
CPC分类号： G21C3/322 , G21C3/3225 , G21C3/326 , G21C3/328 , Y02E30/31 , Y02E30/38
摘要： A fuel assembly for a nuclear power boiling water reactor, including: a fuel channel defining a central fuel channel axis, fuel rods, each having a central fuel rod axis, at least 3 water channels for non-boiling water, each water channel having a central water channel axis and each water channel having a larger cross-sectional area than the cross-sectional area of (the average) fuel rod. The fuel rods comprise a first group of full length fuel rods and a second group of shorter fuel rods. The fuel assembly comprises at least 5 fuel rods which belong to said second group and which are positioned such that the central fuel rod axis of each of these at least 5 fuel rods is closer to the central fuel channel axis than any of the water channel axes of the water channels.

95. 发明申请

US20170287574A1 METHOD OF MAKING A NUCLEAR FUEL PELLET FOR A NUCLEAR POWER REACTOR 审中-公开
公开(公告)号：US20170287574A1
公开(公告)日：2017-10-05
申请号：US15509056
申请日：2015-04-24
申请人： WESTINGHOUSE ELECTRIC SWEDEN AB
发明人： Hans WIDEGREN , Edward J. LAHODA , Lars HALLSTADIUS
IPC分类号： G21C3/18 , G21C21/02 , G21C3/20
CPC分类号： G21C3/18 , G21C3/044 , G21C3/045 , G21C3/20 , G21C3/623 , G21C21/02 , Y02E30/38
摘要： A method of making a nuclear fuel pellet for a nuclear power reactor. The method includes providing a nuclear fuel material in powder form, providing an additive, forming a so-called green pellet, wherein said additive is added either to said nuclear fuel material in powder form or to the green pellet, sintering the green pellet, wherein said additive is such that it causes larger grains in the nuclear fuel pellet, and wherein said additive is made of or includes a substance which causes the larger grains and which substantially leaves at least an outer portion of the pellet before and/or during the sintering step.

96. 发明申请

US20170271034A1 METHOD OF MAKING A NUCLEAR FUEL PELLET FOR A NUCLEAR POWER REACTOR 审中-公开
公开(公告)号：US20170271034A1
公开(公告)日：2017-09-21
申请号：US15509037
申请日：2015-04-24
申请人： WESTINGHOUSE ELECTRIC SWEDEN AB
发明人： Hans WIDEGREN
IPC分类号： G21C21/02 , G21C3/04 , G21C3/334 , G21C3/62
CPC分类号： G21C21/02 , G21C3/044 , G21C3/334 , G21C3/623 , Y02E30/38
摘要： A method of making a nuclear fuel pellet for a nuclear power reactor. The method includes providing a nuclear fuel material in powder form, pressing the powder such that a so-called green pellet is obtained, providing a liquid that comprises an additive which is to be added to the green pellet, contacting the green pellet with the liquid such that the liquid, with the additive, penetrates into the pellet, and sintering the so treated green pellet, wherein the additive is such that larger grains in the nuclear fuel material are obtained with the additive.

97. 发明授权

US09490036B2 Control rod 有权
标题翻译：控制杆
公开(公告)号：US09490036B2
公开(公告)日：2016-11-08
申请号：US13642136
申请日：2011-04-05
申请人： Sture Helmersson , Lars Hallstadius
发明人： Sture Helmersson , Lars Hallstadius
IPC分类号： G21C7/113
CPC分类号： G21C7/113 , Y02E30/31 , Y02E30/39
摘要： A control rod for a nuclear boiling water reactor is described. The control rod has a longitudinal centre axis and control rod blades, each control rod blade having a first and a second side and being substantially parallel to the longitudinal center axis. Each control rod blade comprises an absorber material which extends from a first absorber end to a second absorber end, the distance between the first absorber end and the second absorber end defining an active length. The control rod blades are provided with distance means on the first and second sides of the control rod blades, the distance means extending a distance of at least a third of the active length of the control rod blade.
摘要翻译：描述了核沸水反应堆的控制棒。控制杆具有纵向中心轴线和控制杆叶片，每个控制杆叶片具有第一和第二侧面并且基本上平行于纵向中心轴线。每个控制杆叶片包括从第一吸收器端部延伸到第二吸收体端部的吸收体材料，第一吸收体端部与第二吸收体端部之间的距离限定有效长度。控制杆叶片在控制杆叶片的第一和第二侧上设置有距离装置，该距离装置延伸控制棒叶片的有效长度的至少三分之一的距离。

98. 发明授权

US09230696B2 Control rod for a nuclear power light water reactor 有权
标题翻译：核电轻水反应堆控制棒
公开(公告)号：US09230696B2
公开(公告)日：2016-01-05
申请号：US13696525
申请日：2011-04-08
申请人： Per Seltborg , Lars Hallstadius , Björn Rebensdorff
发明人： Per Seltborg , Lars Hallstadius , Björn Rebensdorff
IPC分类号： G21C7/24 , G21C7/113 , G21C7/117
CPC分类号： G21C7/24 , G21C7/113 , G21C7/117 , Y02E30/31 , Y02E30/32 , Y02E30/39
摘要： The invention concerns a control rod configured for a nuclear power light water reactor of the BWR or PWR kind. The control rod contains absorber material. At least 50%, with respect to weight, of the absorber material that is in the control rod is in the form of hafnium hydride. The invention also concerns the use of such a control rod during operation in a nuclear power light water reactor of the BWR or PWR kind.
摘要翻译：本发明涉及一种配置用于BWR或PWR类型的核电轻水反应堆的控制棒。控制棒包含吸收材料。对照棒中的吸收材料的重量至少为50重量％为氢化铪的形式。本发明还涉及在BWR或PWR类型的核电轻水反应堆中操作期间使用这种控制棒。

99. 发明授权

US09105362B2 Apparatus and a method for cleaning of a nuclear fuel element 有权
标题翻译：用于清洁核燃料元件的装置和方法
公开(公告)号：US09105362B2
公开(公告)日：2015-08-11
申请号：US13499093
申请日：2010-09-29
申请人： Ilija Bijelovic , Stefan Arlmark
发明人： Ilija Bijelovic , Stefan Arlmark
IPC分类号： G21C19/20 , G21C17/06
CPC分类号： G21C19/20 , G21C17/06
摘要： The present invention relates to an apparatus and a method for cleaning a nuclear fuel element in a liquid filled space. The fuel element comprises an inner space with an opening. The apparatus comprises a connecting element, which is adapted to be connected to a portion of the fuel element, which comprises said opening and flow means, which is adapted to create, at least during a part of a cleaning process of the fuel element, a liquid flow through inner space of the fuel element via said opening.
摘要翻译：本发明涉及清洗液体填充空间中的核燃料元件的装置和方法。燃料元件包括具有开口的内部空间。该装置包括连接元件，其适于连接到燃料元件的一部分，其包括所述开口和流动装置，其适于至少在燃料元件的清洁过程的一部分期间产生一个液体经由所述开口流过燃料元件的内部空间。

100. 发明授权

US09053825B2 Fuel assembly 有权
标题翻译：燃油组件
公开(公告)号：US09053825B2
公开(公告)日：2015-06-09
申请号：US13257353
申请日：2010-03-03
申请人： Lars Hallstadius , Mats Dahlback , Anders Soderlund
发明人： Lars Hallstadius , Mats Dahlback , Anders Soderlund
IPC分类号： G21C3/32 , G21C3/324
CPC分类号： G21C3/32 , G21C3/324 , Y02E30/40
摘要： A fuel assembly for a nuclear boiling water reactor is provided. The reactor comprises a plurality of such fuel assemblies and a plurality of control rods. Each control rod is insertable between the fuel assemblies. The fuel assembly has a longitudinal center axis and includes a plurality of elongated fuel rods and an elongated channel box. The channel box has inner sides, facing the fuel rods, and outer sides. Each inner and outer side has a longitudinal center line extending in parallel with the center axis and along the length of the channel box. A number of protrusions are distributed along the center line of at least two of the outer sides. The protrusions are configured to ensure a minimum distance between the outer side and an adjacent control rod and to enable the control rod to easily slide over and on top of the protrusions.
摘要翻译：提供了一种用于核沸水反应堆的燃料组件。反应器包括多个这样的燃料组件和多个控制棒。每个控制杆可插入在燃料组件之间。燃料组件具有纵向中心轴线并且包括多个细长的燃料棒和细长的通道箱。通道箱具有内侧，面向燃料棒和外侧。每个内侧和外侧具有与中心轴平行且沿着通道箱的长度延伸的纵向中心线。多个突起沿着至少两个外侧的中心线分布。突起被配置为确保外侧和相邻控制杆之间的最小距离，并且使得控制杆能够容易地在突起上方滑动。

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