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    • 21. 发明申请
    • FUEL CHANNEL FOR A NUCLEAR BOILING WATER REACTOR
    • 核燃料水反应堆燃油通道
    • WO2016146149A1
    • 2016-09-22
    • PCT/EP2015/055338
    • 2015-03-13
    • WESTINGHOUSE ELECTRIC SWEDEN AB
    • SÖDERLUND, AndersMÅNSSON, Markus
    • G21C3/322G21C3/324
    • G21C3/324G21C21/00Y02E30/40
    • A method of making a fuel channel (10) for a fuel assembly (8) for a nuclear power boiling water reactor comprises: providing at least one first sheet (11) of a Zr-based material of a first thickness (T), providing at least one second sheet (12) of a Zr-based material of a second thickness (t), which is less than said first thickness (T), assembling at least said at least one first sheet (11) and said at least one second sheet (12), such that a fuel channel (10) is formed and such that said at least one first sheet (11) forms a lower part (LP) of the fuel channel (10) and such that said at least one second sheet (12) forms a higher part (HP) of the fuel channel (10) and such that said lower part (LP) is joined with said higher part (HP), wherein said lower part (LP) constitutes 20-75% of the length (L) of the fuel channel (10). The invention also concerns a fuel channel (10) and a fuel assembly (8).
    • 制造用于核电沸水反应堆的燃料组件(8)的燃料通道(10)的方法包括:提供第一厚度(T)的Zr基材料的至少一个第一片(11),提供第一厚度 至少一个第二厚度(t)的Zr基材料的第二片(12),小于所述第一厚度(T),至少组装所述至少一个第一片(11)和所述至少一个 第二片(12),使得形成燃料通道(10),并且使得所述至少一个第一片(11)形成燃料通道(10)的下部(LP),并且使得所述至少一个第二片 片(12)形成燃料通道(10)的较高部分(HP),并且所述下部(LP)与所述较高部分(HP)接合,其中所述下部(LP)构成所述下部(LP)的20-75% 燃料通道(10)的长度(L)。 本发明还涉及燃料通道(10)和燃料组件(8)。
    • 22. 发明申请
    • A FUEL ASSEMBLY
    • 燃油总成
    • WO2010110721A1
    • 2010-09-30
    • PCT/SE2010/050246
    • 2010-03-03
    • Westinghouse Electric Sweden ABHALLSTADIUS, LarsDAHLBÄCK, MatsSÖDERLUND, Anders
    • HALLSTADIUS, LarsDAHLBÄCK, MatsSÖDERLUND, Anders
    • G21C3/324
    • G21C3/32G21C3/324Y02E30/40
    • A fuel assembly (3) for a nuclear boiling water reactor (1) is provided. The reactor comprises a plurality of such fuel assemblies and a plurality of control rods (4). Each control rod is insertable between the fuel assemblies. The fuel assembly has a longitudinal center axis (z) and includes a plurality of elongated fuel rods (7) and an elongated channel box (6). The channel box has inner sides (8), facing the fuel rods, and outer sides (9). Each inner and outer side has a longitudinal center line (y) extending in parallel with the center axis and along the length of the channel box. A number of protrusions (12) are distributed along the center line of at least two of the outer sides. The protrusions are configured to ensure a minimum distance (d2) 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.
    • 提供了一种用于核沸水反应器(1)的燃料组件(3)。 反应器包括多个这样的燃料组件和多个控制杆(4)。 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(z)并且包括多个细长燃料棒(7)和细长通道箱(6)。 通道箱具有面向燃料棒的内侧(8)和外侧(9)。 每个内侧和外侧具有与中心轴平行延伸并且沿着通道箱的长度延伸的纵向中心线(y)。 多个突起(12)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(d2),并且使得控制杆能够容易地在突起上方滑动。
    • 23. 发明申请
    • 管状体の製造方法
    • 制造管体的方法
    • WO2016002913A1
    • 2016-01-07
    • PCT/JP2015/069213
    • 2015-07-02
    • イビデン株式会社
    • 久保 修一高木 俊
    • G21C3/30C04B35/80G21C3/324
    • C04B35/80G21C3/30G21C3/324Y02E30/40
    •  四角形など多角形のセラミック/セラミック複合材またはSiC/SiC複合材よりなる管状体を製造するための有効な製造方法を提供する。管状体の製造方法は、長手方向の辺にR面形状部を有する多角形マンドレルにSiC繊維を巻回し、マンドレルの軸線に対する巻き角度の異なる複数層のSiC繊維層が積層された巻回体を得る巻回工程と、巻回体にSiC-CVDを被覆し、被覆体を形成するCVD工程と、被覆体からマンドレルを除去するマンドレル除去工程と、からなり、SiC繊維層は、最外層のSiC繊維層が、最外層SiC繊維層直下のSiC繊維層よりもマンドレルの軸線に対する巻き角度が小さい。
    • 本发明提供一种用于制造包括四边形或其他多边形陶瓷/陶瓷或SiC / SiC复合材料的管状体的有效制造方法。 所述方法包括以下步骤:其中SiC纤维缠绕在多边形心轴周围的卷绕步骤,多边形心轴的纵向边缘具有圆形部分,产生缠绕体,多个SiC纤维层相对于 心轴的轴线是分层的; CVD步骤,其中所述卷绕体被SiC-CVD涂覆,形成涂覆体; 以及心轴去除步骤,其中心轴从涂覆体移除。 最外层SiC纤维层相对于心轴的卷绕角小于最外层SiC纤维层正下方的SiC纤维层的卷绕角度。
    • 25. 发明申请
    • FUEL ASSEMBLY
    • 燃油总成
    • WO00019448A1
    • 2000-04-06
    • PCT/JP1998/004296
    • 1998-09-25
    • G21C3/16G21C3/32G21C3/324G21C3/30G21C3/62
    • G21C3/324G21C3/16G21C3/32Y02E30/40
    • A fuel assembly capable of increasing a uranium weight and extending a fuel effective length while keeping integrity of fuel rods, comprising a plurality of fuel rods arranged in a 9 x 9 matrix each having uranium dioxide pellets sealed therein, wherein all the fuel rods have an equal length, and the ratio P of the plenum length to the sum of the fuel effective length inside the fuel rod and the plenum length and the ratio D of a pellet density to a theoretical density satisfy the following relations: P 1.22-10P/3, D > 0.897/(1-P).
    • 一种燃料组件,其能够增加铀重量并延长燃料有效长度,同时保持燃料棒的完整性,其包括以9×9矩阵排列的多个燃料棒,每个燃料棒中密封有二氧化铀颗粒,其中所有燃料棒具有 气室长度与燃料棒内燃料有效长度之和与气室长度的比值P与颗粒密度与理论密度之比D的关系满足下列关系:P <0.086,D < 1.0,D> 1.22-10P / 3,D> 0.897 /(1-P)。
    • 28. 发明申请
    • A WRAPPER TUBE FOR A FUEL SUBASSEMBLY OF A NUCLEAR REACTOR CORE AND METHOD FOR PROTECTING FUEL AGAINST OVERHEATING IN CASE OF COOLANT BOILING
    • 一种用于核反应堆核心燃料的包装管和用于保护燃料的方法,用于在冷却水沸腾的情况下过热
    • WO2013098079A1
    • 2013-07-04
    • PCT/EP2012/075292
    • 2012-12-12
    • PAUL SCHERRER INSTITUT
    • MIKITYUK, KonstantinCHENU, AureliaSUN, Kaichao
    • G21C3/322G21C3/324G21C1/02
    • G21C3/322G21C1/022G21C3/324Y02E30/34Y02E30/38
    • The present invention discloses an innovative design of the sodium-cooled fast reactor subassembly wrapper tube (Figure 1 (b)) and a method for protecting the sodium-cooled fast reactor core against overheating and melting in case of the accidents accompanied by a sodium boiling. More generally, the invention is considered to be valuable in any field of technology where a heat generating fuel, heater or the like need to be cooled sufficiently to prevent the resources involved from damage caused by overheating and/or melting. The innovation of the wrapper tube design compared to the traditional wrapper tube design of a sodium-cooled fast reactor fuel subassembly (Figure 1 (a)) consists in an introduction of openings (5). The openings are made in all faces of the wrapper tubes of all fuel subassemblies at the same axial location. The goal of the openings (5) is to provide the sodium flow bypath between the neighbouring subassemblies, in the case when the sodium vapour obstructs or fully blocks the liquid sodium flow at the top of the fuel subassembly (i.e. above the axial level of the openings). Due to this bypath, the sodium flow rate at the inlet of the subassembly, where the boiling occurs, does not significantly drop (Figure 2 (b)). As a result, the sodium vapour does not propagate downwards to the core centre, where the void reactivity coefficient is positive, but rather in radial direction from one channel to another, being always kept in the region of low or even negative void reactivity coefficient. Moreover, the availability of the sodium flow rate through the subassembly, where boiling occurs, is beneficial for preventing the cladding dryout, because a part of sodium will flow through the boiling region in the form of a liquid film on the surface of the claddings.
    • 本发明公开了一种创新的钠冷快堆组件包装管的设计(图1(b)),以及一种在钠沸腾事故发生的情况下保护钠冷快堆的过热和熔化的方法 。 更一般地说,本发明被认为在任何技术领域中是有价值的,其中发热燃料,加热器等需要被充分冷却以防止由于过热和/或熔化引起的损害。 封装管设计与传统的包装管设计相比,钠冷快堆反应堆燃料组件(图1(a))的创新在于介绍了开口(5)。 开口在所有燃料组件的包装管的所有面在相同的轴向位置处制成。 开口(5)的目标是在相邻的子组件之间提供钠流动,在钠蒸气妨碍或完全阻挡在燃料子组件顶部的液态钠流(即在 开口)。 由于这个路径,组件入口处的沸点发生的钠流速不会明显下降(图2(b))。 结果,钠蒸汽不会向下传播到核心中心,其中空穴反应系数为正,而是从一个通道到另一个通道的径向方向,始终保持在低或甚至负的空隙反应系数的区域。 此外,由于部分钠在包层表面上以液膜的形式流过沸腾区域,所以通过发生沸腾的子组件的钠流速的可用性有利于防止包层干燥。
    • 30. 发明申请
    • 管状体
    • WO2016002914A1
    • 2016-01-07
    • PCT/JP2015/069214
    • 2015-07-02
    • イビデン株式会社
    • 久保 修一高木 俊
    • G21C3/30C04B35/565C04B35/80G21C3/324
    • C04B35/565C04B35/80G21C3/30G21C3/324Y02E30/40
    •  四角形など多角形のセラミック/セラミック複合材またはSiC/SiC複合材の管状体の場合におこりうる様々な問題を解決可能な管状体を提供する。複数層のSiC繊維層(4)と、複数層のSiC繊維層(4)を被覆する繊維被覆層(8)と、SiC繊維層(4)の隙間を充填するとともに外表面を構成するCVD-SiC層とからなるSiC/SiC複合材からなる多角形の管状体(10)であって、管状体(10)の長手方向の辺は、R面(6)を有し、SiC繊維層(4)は、最外層のSiC繊維層が、最外層SiC繊維層直下のSiC繊維層よりもマンドレルの軸線に対する巻き角度が小さい。
    • 本发明提供了一种管状体,其使得可以解决当使用由四方晶体或其它多边形陶瓷/ SiC / SiC复合材料组成的管状体时可能出现的各种问题。 所提供的管状体是包括SiC / SiC复合材料的多边形管状体(10),其包括:多个SiC纤维层(4); 涂覆所述SiC纤维层(4)的纤维涂层(8); 以及填充SiC纤维层(4)之间的间隙并构成SiC / SiC复合材料的外表面的CVD SiC层。 所述管状体(10)的纵向边缘具有圆形表面(6),并且最外面的SiC纤维层相对于心轴轴线的缠绕角度小于在最外层SiC纤维层正下方的SiC纤维层的卷绕角度。