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1. 发明授权

US11430578B2 Subcritical reactivity monitor utilizing prompt self-powered in-core detectors 有权
公开(公告)号：US11430578B2
公开(公告)日：2022-08-30
申请号：US16850251
申请日：2020-04-16
申请人： Westinghouse Electric Company LLC
发明人： Michael D. Heibel
IPC分类号： G21C17/104 , G21C17/108 , G21D3/00 , G21C9/02 , G21C7/22 , G21C7/24 , G21C19/28
摘要： A subcritical reactivity monitor that utilizes one or more primarily gamma sensitive (prompt responding) self-powered detector style radiation measurement devices located within the core of a nuclear reactor to determine the amount that the reactor multiplication factor (Keff) is below the reactivity required to achieve or maintain a self-sustaining nuclear chain reaction. This invention utilizes measured changes in the self-powered detectors' current(s) to allow a reactor operator to measure the value of Keff at essentially any desired interval while the reactor is shutdown with a Keff value less than the critical value of 1.0. This invention will enable integration of the output of the value of Keff directly into the Reactor Protection System, which will enable the elimination of the operational and core design analysis constraint costs associated with the current Boron Dilution Accident prevention methodology and enable automatic control of the Chemical Volume Control System.

2. 发明授权

US10692611B2 Passive inherent reactivity coefficient control in nuclear reactors 有权
公开(公告)号：US10692611B2
公开(公告)日：2020-06-23
申请号：US15444265
申请日：2017-02-27
申请人： Oklo Inc.
发明人： Jacob DeWitte , Joshua G. Richard
IPC分类号： G21C5/12 , G21C7/02 , G21C5/02 , G21C3/322 , G21C7/24 , G21C3/42
摘要： System and methods are disclosed for controlling a nuclear reactor that uses fuel having plutonium-239. The nuclear reactor includes a neutron moderator, such as ZrH1.6, which behaves as an Einstein oscillator and increases the energy of thermal neutrons into the Pu-239 neutron absorption resonance as the temperature of the nuclear reactor increases. A neutron absorbing element with neutron absorption around 0.3 eV is added to the nuclear reactor to suppress any reactivity gain that can occur due to the increase in temperature. The amount of the neutron absorbing element to be added to the nuclear reactor is calculated such that the reactivity gain that may occur at any time during the life of the fuel is suppressed.

3. 发明授权

US10672522B2 Magneto-rheological fluid based filter/reflector 审中-公开
公开(公告)号：US10672522B2
公开(公告)日：2020-06-02
申请号：US14617144
申请日：2015-02-09
申请人： Westinghouse Electric Company LLC
发明人： Michael D. Heibel
IPC分类号： G21C7/06 , G21C7/00 , G21C11/06 , G21C7/24 , G21F1/00 , G21F3/00
摘要： A magneto-rheological filter/reflector that controls the transmissivity of any form of electromagnetic or particulate radiation through the filter by varying discrete electromagnetic fields across a magneto-rheological fluid. In one embodiment, the filter/reflector controls the rate of the nuclear reaction within the core of a reactor without any moving parts.

4. 发明申请

US20190315498A1 NUCLEAR THERMAL PROPULSION ROCKET ENGINE 审中-公开
公开(公告)号：US20190315498A1
公开(公告)日：2019-10-17
申请号：US15955596
申请日：2018-04-17
申请人： HARDY ENGINEERING & MANUFACTURING, INC.
发明人： Richard HARDY , Jonathan HARDY , Anna E. HARDY
IPC分类号： B64G1/40 , F02K9/42 , F02K9/46 , F02K9/64 , F02K9/70 , F02K9/97 , G21C3/60 , G21C7/24 , G21C19/18
摘要： A fission based nuclear thermal propulsion rocket engine. An embodiment provides a source of fissionable material such as plutonium in a carrier fluid having neutron moderating constituents, such as hydrogen and/or carbon, therein. In various embodiments, the carrier fluid may be methane, or ethane, or a combination thereof. A neutron source is provided, such as from a neutron beam generator. By way of engine design geometry, various embodiments may provide for intersection of neutrons with the fissionable material injected by way of the carrier fluid, while in a reactor provided in the form of a reaction chamber. Impact of neutrons on fissionable material results in a nuclear fission in sub-critical mass reaction conditions in the reactor, resulting in release of heat energy to the materials within the reactor. The reactor is sized and shaped to receive the reactants and an expandable fluids such as hydrogen, and to confine heated and pressurized gases for discharge out through a throat, into a rocket engine expansion nozzle for propulsive discharge. The design provides a rocket engine with a specific impulse in the range of from about eight hundred (800) seconds to about twenty five hundred (2500) seconds.

5. 发明申请

US20130051510A1 CONTROL ROD FOR A NUCLEAR POWER LIGHT WATER REACTOR 有权
标题翻译：一种核能动力水反应堆的控制杆
公开(公告)号：US20130051510A1
公开(公告)日：2013-02-28
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
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。

6. 发明授权

US07335902B2 Container for storing radioactive materials 有权
标题翻译：储存放射性物质的集装箱
公开(公告)号：US07335902B2
公开(公告)日：2008-02-26
申请号：US10918229
申请日：2004-08-13
申请人： Rengarajan Soundararajan
发明人： Rengarajan Soundararajan
IPC分类号： G21F5/00 , G21F1/00 , G21F1/10 , C09K3/00 , G21C7/24
CPC分类号： G21F9/36 , C08G18/2018 , C08G18/542 , C08G18/7664 , C08K3/08 , C09D175/04 , F23G5/027 , F23G7/003 , F23G2201/301 , F23G2201/302 , F23G2209/18 , G21F1/106 , G21F9/06 , G21F9/30 , G21F9/305 , G21F9/307 , C08L75/04
摘要： A urethane based polymer composition is provided that exhibits superior shielding properties during and after exposure to high level radiation. The composite is formed by mixing a liquid isocyanate monomer, preferably 4,4′-diisocyanate monomer with a liquid phenolic resin, preferably phenol formaldehyde resin, and a phosphate ester flame retardant. An optional pyridine catalyst may be added to shorten the cure time. The resulting composition cures at room temperature and can be utilized in several manners, including spraying or pouring the composition prior to curing over radioactive material to prevent leakage of radiation. The uncured composite can be sprayed on the walls of a room or container to prevent leakage of radiation and can also be used to contain radiation prior to demolition. The uncured composite can also be molded into bricks or panels for use in construction. In a preferred embodiment, the polymer composition further incorporates radioactive waste, namely depleted uranium oxide, and can be used in conjunction with specially designed containers for storing radioactive material. The resulting polymer/waste composition cures at room temperature and does not deteriorate or suffer structural damage when exposed to higher levels of gamma radiation, nor do the mechanical or chemical properties undergo any detectable change. The composition is resistant to biodegradation and combustion, and does not creep or shrink during thermal cycling.
摘要翻译：提供了一种聚氨酯基聚合物组合物，其在暴露于高水平辐射期间和之后显示优异的屏蔽性能。复合材料通过将液体异氰酸酯单体，优选4,4'-二异氰酸酯单体与液体酚醛树脂，优选苯酚甲醛树脂和磷酸酯阻燃剂混合而形成。可以加入任选的吡啶催化剂以缩短固化时间。所得组合物在室温下固化并且可以以几种方式使用，包括在固化放射性材料之前喷涂或浇注组合物以防止辐射泄漏。未固化的复合材料可以喷涂在房间或容器的壁上，以防止辐射泄漏，并且还可以用于在拆除之前容纳辐射。未固化的复合材料也可以模制成砖或面板用于施工。在优选的实施方案中，聚合物组合物还包含放射性废物，即贫化铀氧化物，并且可以与用于储存放射性物质的专门设计的容器结合使用。所得聚合物/废物组合物在室温下固化，并且在暴露于较高水平的γ辐射时不会劣化或遭受结构损伤，机械或化学性质也不会发生任何可检测的变化。该组合物耐生物降解和燃烧，并且在热循环期间不会蠕变或收缩。

7. 发明授权

US5754608A Control cluster for a nuclear reactor 失效
标题翻译：核反应堆的控制组
公开(公告)号：US5754608A
公开(公告)日：1998-05-19
申请号：US314491
申请日：1994-09-28
申请人： Luc Pillet
发明人： Luc Pillet
IPC分类号： G21C7/10 , G21C7/24
CPC分类号： G21C7/10 , G21Y2002/201 , G21Y2004/10 , Y02E30/39
摘要： The control cluster is usable for power regulation and for load following. It comprises a spider from which are suspended rods containing a column of neutron-absorbing material. The neutron-absorbing material in at least some rods is stainless steel in lower part of the rod and, in an upper part of the rod having a length equal to 20 and 40% of the height of the column of absorbing material, another material exhibiting an interference neutron absorption which is much higher than that of stainless steel, for instance Ag-In-Cd.
摘要翻译：控制集群可用于功率调节和负载跟随。它包括一个蜘蛛，其中是含有一列中子吸收材料的悬挂杆。至少一些棒中的中子吸收材料在杆的下部是不锈钢，并且在杆的上部具有等于吸收材料柱的高度的20和40％的长度，另外一种材料表现出干涉中子吸收比不锈钢（例如Ag-In-Cd）高得多。

8. 发明授权

US5273709A High neutron absorbing refractory compositions of matter and methods for their manufacture 失效
$High neutron absorbing refractory compositions of matter and methods for their manufacture$
标题翻译：高中子吸收耐火材料组合物及其制造方法
公开(公告)号：US5273709A
公开(公告)日：1993-12-28
申请号：US933859
申请日：1992-08-24
申请人： Danny C. Halverson , Garth W. Billings , George M. Johnston
发明人： Danny C. Halverson , Garth W. Billings , George M. Johnston
IPC分类号： G21C7/24 , B22F3/12
CPC分类号： G21C7/24 , Y02E30/39
摘要： Neutron absorbing refractory B.sub.4 C-Gd and Gd.sub.2 O.sub.3 -Gd cermets, B.sub.4 C-Gd and Gd.sub.2 O.sub.3 -Gd metal-matrix composites, and B.sub.4 C-Gd.sub.2 O.sub.3 ceramic-ceramic composites can be manufactured by applying fundamental thermodynamic and kinetic guidelines as processing principals.Three steps are involved in the fabrication of these new compositions of matter. First, the starting materials are consolidated into a compacted porous green body. Next, the green body is densified using the appropriate method depending on the class of material sought: cermet, metal-matrix composite, or ceramic-ceramic composite. Finally, either during the densification process or by subsequent heat treatment, new phase evolution is obtained via interfacial chemical reactions occurring in the microstructures.The existence of a new phase has been identified in B.sub.4 C-Gd and B.sub.4 C-Gd.sub.2 O.sub.3 composites.
摘要翻译：中子吸收耐火材料B4C-Gd和Gd2O3-Gd金属陶瓷，B4C-Gd和Gd2O3-Gd金属基复合材料以及B4C-Gd2O3陶瓷陶瓷复合材料可以通过应用基本的热力学和动力学指导作为加工原理来制造。这些新的物质组合物的制造涉及三个步骤。首先，起始材料被固结成压实的多孔生坯。接下来，根据所寻求的材料类别，使用适当的方法使生坯体致密化：金属陶瓷，金属基复合材料或陶瓷 - 陶瓷复合材料。最后，在致密化过程中或通过随后的热处理，通过在微结构中发生的界面化学反应获得新的相变。在B4C-Gd和B4C-Gd2O3复合材料中已经发现了新相的存在。

9. 发明授权

US5064602A Control rod flow diverters 失效
标题翻译：控制杆流量分流器
公开(公告)号：US5064602A
公开(公告)日：1991-11-12
申请号：US596434
申请日：1990-10-12
申请人： James E. Cearley , David F. Holland , David T. Hurt , Frederick J. Moody
发明人： James E. Cearley , David F. Holland , David T. Hurt , Frederick J. Moody
IPC分类号： G21C7/10 , G21C7/103 , G21C7/113 , G21C7/22 , G21C7/24
CPC分类号： G21C7/113 , G21C7/10 , G21Y2002/201 , G21Y2004/302 , Y02E30/39
摘要： Flux-trap control rod flow diverters comprising a series of tabs formed along the length of one side of a hafnium neutron absorber tube, and bent inwards towards the opposing side so as to allow water in one side of the tube, and simultaneously divert internal water out of corresponding openings formed in the opposing side of the tube. In this way the internal water does not stay inside the control rod long enough to boil, and the water's effectiveness as a neutron moderator is assured.
摘要翻译：磁通陷阱控制杆流量分流器，包括沿铪中子吸收管的一侧的长度形成的一系列凸片，并朝向相对侧向内弯曲，以允许管的一侧的水，同时将内部水分流在形成在管的相对侧中的相应开口之外。以这种方式，内部水不会停留在控制棒内部足够长的时间以使其沸腾，并且确保水作为中子调节剂的有效性。

10. 发明授权

US4992225A Water corrosion-resistant ceramic oxide body 失效
标题翻译：耐水腐蚀陶瓷氧化物体
公开(公告)号：US4992225A
公开(公告)日：1991-02-12
申请号：US260211
申请日：1988-10-19
申请人： Paul Van Diemen , Kenneth W. Lay
发明人： Paul Van Diemen , Kenneth W. Lay
IPC分类号： C04B35/50 , C04B35/51 , G21C7/24
CPC分类号： G21C7/24 , C04B35/50 , Y02E30/39
摘要： A lanthanide oxide selected from the group consisting of dysprosium oxide, erbium oxide, europium oxide, gadolium oxide and samarium oxide is formed into a compact and sintered to produce a body useful as a control rod material in a water cooled nuclear reactor. The lanthanide oxide is preferably combined with a corrosion stabilizing group 4A metal oxide such as hafnium oxide.
摘要翻译：将选自氧化镝，氧化铒，氧化铕，氧化钆和氧化钐的镧系元素氧化物形成为紧凑型并烧结，以制造用作水冷核反应堆中的控制棒材料的主体。镧系元素氧化物优选与腐蚀稳定基团4A的金属氧化物如氧化铪组合。

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