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1. 发明授权

US5778545A Magnetically damped azimuth resolver 失效
标题翻译：磁阻方位角解算器
公开(公告)号：US5778545A
公开(公告)日：1998-07-14
申请号：US643817
申请日：1996-05-06
申请人： Michael G. Smith , James Howard Terhune , Roy C. May , George A. Romano , Balasubramanian S. Kowdley
发明人： Michael G. Smith , James Howard Terhune , Roy C. May , George A. Romano , Balasubramanian S. Kowdley
IPC分类号： G01B7/30 , G01C9/12
CPC分类号： G01C9/12 , G01B7/30
摘要： A means for damping a low-friction azimuth resolver by use of an array of small magnets acting on a metallic pendulum attached to the resolver shaft. The magnetic field acts on the pendulum motion to induce a motional electromotive force and associated currents, which produce forces opposed to the motion, thereby acting as a non-contact damper on the resolver shaft. When the resolver shaft is at rest, no "eddy currents" are produced in the static magnetic field and no damping force exists. If the shaft moves, the attached pendulum cuts the magnetic flux lines and produces a drag force proportional to the shaft angular speed. The pendulum is typically made of diamagnetic material, such as lead or copper, thereby assuring that the induced forces arise solely from the motion. The magnetic field is produced by an array of small, but intense, samarium-cobalt magnets contained in a compact package providing for uniform damping throughout 360.degree. of resolver motion. The device is designed and constructed as a modification to standard resolvers and allows for application where tight clearances have previously been a constraint.
摘要翻译：用于通过使用作用在连接到旋转变压器轴的金属摆的小磁体阵列来阻尼低摩擦方位分解器的装置。磁场作用于钟摆运动以引起运动电动势和相关联的电流，其产生与运动相反的力，从而用作解析器轴上的非接触阻尼器。当解析器轴处于静止状态时，在静磁场中不会产生“涡流”，并且不存在阻尼力。如果轴移动，附接的摆锤切断磁通线并产生与轴角速度成正比的阻力。摆锤通常由抗磁性材料制成，例如铅或铜，从而确保诱发力仅源于运动。该磁场是由包含在紧凑型封装中的小而强烈的钐钴磁体的阵列产生的，提供360°旋转变压器运动的均匀阻尼。该设备被设计和构造为标准解析器的修改，并允许紧急间隙以前是约束的应用。

2. 发明授权

US6128361A Coating for reducing corrosion of zirconium-based alloys induced by . .beta-particle irradiation 失效
标题翻译：用于降低由β-粒子照射引起的锆基合金腐蚀的涂层
公开(公告)号：US6128361A
公开(公告)日：2000-10-03
申请号：US621673
申请日：1996-03-26
申请人： James Howard Terhune , Barry Monroe Gordon
发明人： James Howard Terhune , Barry Monroe Gordon
IPC分类号： G21C5/00 , G21C7/10 , G21F1/08
CPC分类号： G21C7/10 , G21Y2002/103 , G21Y2004/10 , Y02E30/39
摘要： A technique for reducing the shadow corrosion effect in zirconium-based alloys caused by .beta.-particles emitted by adjacent components containing one or more elements that emit .beta.-particle flux when activated by neutron capture. The technique entails providing a coating capable of absorbing .beta.-particles, so as to mitigate the adverse effect of .beta.-particle bombardment of a zirconium-based alloy. Preferred coating materials include beryllia, beryllium, tin, zinc, chromium and cadmium. The coatings can be applied to various nuclear reactor structural alloys, such as stainless steel and nickel, platinum, copper, hafnium and yttrium-based alloys containing 0.2 weight percent manganese or more.
摘要翻译：一种用于减少锆基合金中阴影腐蚀效应的技术，其由包含一种或多种在中子俘获激活时发射β-粒子通量的相邻成分发射的β-粒子引起。该技术需要提供能够吸收β-粒子的涂层，以便减轻锆基合金的β-粒子轰击的不利影响。优选的涂料包括铍，铍，锡，锌，铬和镉。涂层可以应用于各种核反应堆结构合金，例如含有0.2重量％以上锰的不锈钢和镍，铂，铜，铪和钇基合金。

3. 发明授权

US6137853A Method and apparatus for remote ultrasonic inspection of nozzles in vessel bottom head 失效
标题翻译：用于远程超声波检查船底底部喷嘴的方法和装置
公开(公告)号：US6137853A
公开(公告)日：2000-10-24
申请号：US322839
申请日：1994-10-13
申请人： Brian Charles Duckering , David Lee Richardson , James Howard Terhune , Frank Ortega
发明人： Brian Charles Duckering , David Lee Richardson , James Howard Terhune , Frank Ortega
IPC分类号： G01N29/04 , G01N29/26 , G21C17/003 , G21C17/017 , G21C17/10
CPC分类号： G21C17/003 , G21C17/017 , G01N2291/044 , G01N2291/2695 , G21Y2002/205 , G21Y2002/401 , G21Y2004/30 , G21Y2004/401 , G21Y2004/502
摘要： A method and an apparatus for ultrasonically inspecting the welds which attach the differential pressure and liquid poison nozzles to the bottom head of the reactor pressure vessel in a boiling water reactor. The scanning apparatus is seated on the upper taper of the nozzle outer tube and incorporates a stationary frame having a cutaway section which allows installation from the side. The apparatus has vertical and circumferential positioning mechanisms which are operated remotely to scan an ultrasonic transducer package over the circumferential welds and heat-affected zones thereof. The rotating frame has a transducer carriage mounted thereon which is vertically displaceable relative to the rotating frame. The vertical and angular motion motors can be controlled together to provide the desired path for the ultrasonic transducer around the stub tube. The tool also includes a vessel contour follower which follows the contour of the inclined surfaces of the reactor pressure vessel bottom head. The vessel contour follower is linked to the ultrasonic transducer to ensure that the transducer follows the contour of the weld, in position and angle.
摘要翻译：一种用于在沸水反应器中超声波检查将压差和液体毒物喷嘴附接到反应堆压力容器的底部头部的焊接方法和装置。扫描装置位于喷嘴外管的上锥形部上，并且包括具有允许从侧面安装的切口部分的固定框架。该装置具有纵向和周向的定位机构，其远程操作以在其周边焊缝及其热影响区域上扫描超声换能器封装。旋转框架具有安装在其上的换能器支架，其相对于旋转框架可垂直移位。可以将垂直和角运动马达一起控制，以提供超声换能器绕短管的所需路径。该工具还包括跟随反应堆压力容器底部头部的倾斜表面的轮廓的容器轮廓跟随器。容器轮廓跟随器连接到超声波换能器，以确保传感器遵循焊缝的轮廓，位置和角度。

4. 发明授权

US5672928A Stabilized in-vessel direct current source 失效
标题翻译：稳定的直流电源
公开(公告)号：US5672928A
公开(公告)日：1997-09-30
申请号：US505411
申请日：1995-07-21
申请人： James Howard Terhune
发明人： James Howard Terhune
IPC分类号： C23F13/04 , F04F5/44 , G21C15/25 , G21H1/00
CPC分类号： F04F5/44 , C23F13/04 , G21C15/25 , G21H1/00 , G21Y2002/201 , G21Y2002/207 , G21Y2004/20 , G21Y2004/30 , G21Y2004/304 , G21Y2004/402 , Y02E30/40
摘要： A method for stabilizing direct current generated by neutron activation of a plurality of interconnected .beta.-emitter (nuclear decay electron) cells, which are placed in a specific position in the out-of-core region of a light water nuclear reactor. The method entails a synergistic combination of neutron-absorbing isotopes, in specific relationship to each other, the amount of each absorber and their respective locations in the neutron flux field being chosen to render the total current-time characteristic substantially constant over a significant number of reactor full-power-years. The method enhances the current output and lifetime of the current generator by greatly deferring burn-up of the neutron absorbers. If configured as a DC voltage source for powering radiation-hardened, high-temperature integrated circuitry contained in the reactor pressure vessel, voltage regulation circuitry is not necessary. Typically, the useful lifetime is rendered independent of output current and can be extended indefinitely, thereby greatly reducing replacement costs.
摘要翻译：一种用于稳定由多个相互连接的β-发射体（核衰变电子）单元的中子活化产生的直流电的方法，其被放置在轻水核反应堆的芯外区域的特定位置。该方法需要中和吸收同位素的协同组合，具有彼此特定的关系，每个吸收体的量和它们在中子通量场中的相应位置被选择以使总电流 - 时间特性在相当数量的反应堆全功率年。该方法通过大大推迟中子吸收器的燃耗来提高电流发生器的电流输出和寿命。如果配置为直流电压源，为反应堆压力容器中包含的辐射硬化的高温集成电路供电，则不需要电压调节电路。通常，使用寿命与输出电流无关，可以无限期地延长，从而大大降低了更换成本。

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