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1. 发明授权

US5514306A Process to reclaim UO.sub.2 scrap powder 失效
标题翻译：回收UO2废粉的工艺
公开(公告)号：US5514306A
公开(公告)日：1996-05-07
申请号：US11561
申请日：1993-02-01
申请人： Richard I. Larson , Thomas J. Flaherty, III , William R. Becker , Michael R. Chilton
发明人： Richard I. Larson , Thomas J. Flaherty, III , William R. Becker , Michael R. Chilton
IPC分类号： C01G56/00 , C01G43/025 , G21C3/62 , G21C21/02 , G01C21/00
CPC分类号： C01G43/025 , C01P2004/80 , C01P2006/10 , C01P2006/14 , C01P2006/82
摘要： A process for reclaiming scrap UO.sub.2 materials yields a high-sinter-density pellet. The scrap is oxidized in a high-temperature furnace to produce U.sub.3 O.sub.8. The U.sub.3 O.sub.8 particles from the oxidation furnace are reacted with nitric acid to produce a solution of uranyl nitrate that meets the concentration and free acid requirements of the ADU precipitation process. A controlled two-stage ADU precipitation process is carried out to produce ADU particles with a size and morphology that leads to high-surface-area UO.sub.2 powder with excellent sintered pellet ceramic characteristics. After calcination and hydrogen reduction to UO.sub.2, the high-surface-area UO.sub.2 powder is passivated.
摘要翻译：回收废旧UO2材料的方法产生高烧结密度的颗粒。废料在高温炉中氧化生成U3O8。来自氧化炉的U3O8颗粒与硝酸反应，产生满足ADU沉淀过程浓度和游离酸需求的硝酸铀酰溶液。进行受控的两级ADU沉淀工艺，生产具有优异烧结颗粒陶瓷特性的高表面积UO2粉末的尺寸和形态的ADU颗粒。在煅烧和氢还原成UO2之后，高表面积的UO2粉末被钝化。

2. 发明授权

US5473648A Decontamination process 失效
标题翻译：净化过程
公开(公告)号：US5473648A
公开(公告)日：1995-12-05
申请号：US228776
申请日：1994-04-18
申请人： Richard I. Larson , Michael R. Chilton
发明人： Richard I. Larson , Michael R. Chilton
IPC分类号： G21F9/28 , C22B34/14 , C23G1/10 , G21C19/42
CPC分类号： C22B34/14 , G21Y2004/60
摘要： The present invention relates to a process of decontaminating zirconium-based alloy claddings tubes used in nuclear reactor fuel rods. The process involved the use of a permanganate in a dilute acid solution. The process renders the alloy suitable for uncontrolled release into a non-radioactive environment.
摘要翻译：本发明涉及在核反应堆燃料棒中使用的锆基合金包层管的净化方法。该方法涉及在稀酸溶液中使用高锰酸盐。该方法使合金适合不受控制地释放到非放射性环境中。

3. 发明授权

US5702676A Production method for obtaining pressable powder yielding high sinter density pellets without defects 失效
标题翻译：获得可产生高烧结密度的颗粒的可压制粉末的生产方法，没有缺陷
公开(公告)号：US5702676A
公开(公告)日：1997-12-30
申请号：US667795
申请日：1996-06-20
申请人： Richard I. Larson , Stephen E. Selby , Michael P. Enger
发明人： Richard I. Larson , Stephen E. Selby , Michael P. Enger
IPC分类号： C01G43/025
CPC分类号： C01G43/025 , C01P2006/10 , C01P2006/12
摘要： This invention provides an improved process of preparing UO.sub.2 powder from poor quality, partially oxidized powder containing organic and inorganic impurities. The process is illustrated in the flow chart of FIG. 1 which includes the steps of (a) oxidizing a uranium-containing scrap also containing inorganic and cationic organic impurities; (b) solubilizing, typically with nitric acid, the uranium contained in the oxidized scrap to produce uranyl nitrate; (c) solvent extracting the solubilized product of step (b) to remove cation impurities to provide a purified uranyl nitrate solution; (d) precipitating the purified uranyl nitrate with ammonia to form ammonium diuranate powder; and (e) calcining and passivating the ammonium diuranate powder to produce UO.sub.2 powder; and optionally (f) forming the UO.sub.2 powder of step (e) into pellets and sintering the formed pellets to produce sintered UO.sub.2 pellets.
摘要翻译：本发明提供了一种由劣质的部分氧化粉末制备含有机和无机杂质的氧化铝粉末的改进方法。该过程在图5的流程图中示出。 1，其包括以下步骤：（a）氧化含有无机和阳离子有机杂质的含铀废料; （b）通常用硝酸溶解氧化废料中所含的铀以产生硝酸铀酰; （c）溶剂萃取步骤（b）的溶解产物以除去阳离子杂质以提供纯化的硝酸铀酰溶液; （d）用氨沉淀净化的铀酰硝酸铀以形成十二烷酸铵粉末; 和（e）煅烧和钝化二异氰酸铵粉末以产生UO2粉末; 和（f）将步骤（e）的UO 2粉末形成颗粒并烧结所形成的颗粒以制备烧结的UO2颗粒。

4. 发明授权

US5613186A Method for monitoring the ADU process for technetium 失效
标题翻译：监测锝的ADU过程的方法
公开(公告)号：US5613186A
公开(公告)日：1997-03-18
申请号：US584547
申请日：1996-01-11
申请人： Richard I. Larson , Judith E. Culbreth , Juanita H. Pigford
发明人： Richard I. Larson , Judith E. Culbreth , Juanita H. Pigford
IPC分类号： C01G99/00 , C22B60/02 , G01N30/14 , G01N30/88 , G21C19/46 , C01G57/00
CPC分类号： G21C19/46 , C01G99/006 , C22B60/026 , G01N2030/143 , G01N2030/8809 , Y02W30/883
摘要： Technetium-99 is quantitatively determined in samples containing uranium using extraction chromatography to remove uranium which otherwise interferes in detecting technetium-99 in low concentrations.
摘要翻译：锝-99在含铀样品中使用提取色谱定量测定，以除去铀，否则会干扰低浓度检测锝-99。

5. 发明授权

US4168914A Method and apparatus for blending fine and cohesive powders in a fluidized bed with gas injection through ball valves 失效
标题翻译：在流化床中通过球阀喷射气体的方法和装置
公开(公告)号：US4168914A
公开(公告)日：1979-09-25
申请号：US803727
申请日：1977-06-06
申请人： Richard I. Larson , John T. Adomitis , Thomas G. Beckingham
发明人： Richard I. Larson , John T. Adomitis , Thomas G. Beckingham
IPC分类号： B01F13/02 , B01J8/18 , G21C21/02
CPC分类号： B01J8/1818 , B01F13/0294 , Y10S423/16
摘要： A mixture of fine and cohesive powders is blended to complete homogeneity in a nuclear-safe bubbling-bed fluidized bed blender having an improved fluidizing grid. The blender includes a generally vertically-oriented slab-shaped, nuclear-safe mixing vessel having a fluidizing grid disposed at one end of the vessel. The fluidizing grid comprises a linear array of generally downwardly-directed, pyramidal-shaped hoppers each having walls converging into a conically-shaped opening. A plurality of ball valves are employed, one such valve being disposed at the bottom of each hopper. The rotary closure member of each of the ball valves includes a first set of gas orifices for directing a flow of fluidizing gas upwardly in a divergent swirl-shaped pattern along the walls of each of the hoppers. In one embodiment a second set of fluidizing gas orifices for directing a flow of fluidizing gas downwardly into the apex of each of the hoppers is also provided. During blending, fluidizing gas is supplied to the first set of orifices, or to a combination of the first and second sets of orifices, in an amount sufficient to cause bubbles of fluidizing gas to rise through the mixture of powders and emerge from the top surface of the powders until a homogeneous blend of powders is achieved.
摘要翻译：混合精细和粘性粉末的混合物以在具有改进的流化网格的核安全鼓泡床流化床混合器中完成均匀性。该混合器包括一个大致垂直取向的板状的核安全混合容器，其具有设置在容器一端的流化栅格。流化栅格包括大致向下定向的金字塔形的料斗的线性阵列，每个具有会聚到锥形开口的壁。使用多个球阀，一个这样的阀设置在每个料斗的底部。每个球阀的旋转关闭构件包括第一组气体孔，用于沿着每个料斗的壁沿着发散的漩涡形图案向上引导流化气体流。在一个实施例中，还提供了用于将流化气体向下引导到每个料斗的顶点的第二组流化气体孔。在混合期间，将流化气体以足以使流化气体的气泡上升通过粉末混合物并从顶表面出来的量将第一组孔口或第一组孔口的组合供应到第一组孔口的粉末，直到达到均匀的粉末混合物。

6. 发明授权

US5069888A Process for passivating uranium oxides to control oxidation 失效
标题翻译：用于处理氧化铀以控制氧化的方法
公开(公告)号：US5069888A
公开(公告)日：1991-12-03
申请号：US387187
申请日：1989-07-31
申请人： Richard I. Larson , Abdul G. Dada , John L. Harmon
发明人： Richard I. Larson , Abdul G. Dada , John L. Harmon
IPC分类号： C01G43/01 , C01G43/00 , C01G43/025 , C04B41/45 , C04B41/81 , G21C3/62
CPC分类号： C04B41/009 , C01G43/025 , C04B41/4584 , C04B41/81 , G21C3/62 , C01P2002/20 , C01P2002/78 , C01P2004/84 , C01P2006/10 , C01P2006/12 , C01P2006/60 , C01P2006/80 , C01P2006/82 , Y02E30/38
摘要： A method of passivating the surface of particulate uranium oxides is disclosed comprising a process of continuously contacting uranium oxide particles with an oxygen containing and cooling counter flowing gas stream. The treatment produces a protective surface which inhibits subsequent oxygen chemisorption of the particulate uranium oxides.

7. 发明授权

US4816187A Binder system for the manufacture of nuclear pellets, and the method and product thereof 失效
标题翻译：用于制造核粒料的粘合剂体系及其方法和产品
公开(公告)号：US4816187A
公开(公告)日：1989-03-28
申请号：US22032
申请日：1987-03-05
申请人： Richard I. Larson , Richard P. Ringle
发明人： Richard I. Larson , Richard P. Ringle
IPC分类号： C04B35/51 , G21C3/62 , G21C21/00 , C07F5/00 , C09K11/04
CPC分类号： C04B35/51 , G21C3/623 , Y02E30/38
摘要： A fugitive binder composition for compression molding uranium dioxide nuclear fuel comprising the reaction product of a strongly alkali water solution of a diamine and oxalate ions with uranium oxide which is free of carbonates and carbamates, and having the formula:[.sup.+ NH.sub.3 (CH.sub.2).sub.2 NH.sub.3.sup.+ ][UO.sub.2 (C.sub.2 O.sub.4).sub.2 (H.sub.2 O).sub.2 ][.sup.+ NH.sub.3 (CH.sub.2).sub.2 NH.sub.3.sup.+ ].
摘要翻译：一种用于压缩二氧化铀核燃料的短暂的粘结剂组合物，其包含二胺和草酸根离子的强碱性水溶液与不含碳酸盐和氨基甲酸酯的氧化铀的反应产物，并具有下式：[+ NH 3（CH 2）2 NH 3 + ] [＆upbar＆UO2（C2O4）2（H2O）2] [+ NH3（CH2）2NH3 +]。

8. 发明授权

US5401664A Analytical method for determining concentration of decomposition products in solvent used for solvent extraction 失效
标题翻译：用于溶剂萃取的溶剂中分解产物浓度的分析方法
公开(公告)号：US5401664A
公开(公告)日：1995-03-28
申请号：US74644
申请日：1993-06-10
申请人： Richard I. Larson , Woodfin V. Ligon , Richard L. Fox , Hans Grade
发明人： Richard I. Larson , Woodfin V. Ligon , Richard L. Fox , Hans Grade
IPC分类号： G01N30/72 , G01N30/86 , G01N30/88 , G01N31/00 , G21C19/46 , G01N1/00 , G01N37/00
CPC分类号： G01N31/00 , G01N30/7206 , Y10T436/10 , Y10T436/109163 , Y10T436/13 , Y10T436/16 , Y10T436/163333 , Y10T436/24 , Y10T436/25 , Y10T436/25375
摘要： A safe analytical technique for determining the concentration amount of dibutyl and monobutyl phosphate degradation products in the TBP-dodecane solvent used in solvent extraction processes. This method of chemical analysis eliminates the use of diazomethane, which is toxic and explosive, thereby providing a safer laboratory technique for routine analyses required to monitor production solvent extraction processes. The solvent sample to be analyzed is spiked with mass labelled, deuterated dibutyl and monobutyl phosphates, which act as internal standards. After adding a silylating agent, bistrimethylsilyltrifluoracetamide, the sample is injected into a gas chromatograph/mass spectrometer, which measures the ratio between the labelled internal standard and the naturally occurring material to obtain a quantitative result.
摘要翻译：一种用于确定溶剂萃取过程中使用的TBP-十二烷溶剂中二丁基和一丁基磷酸酯降解产物浓度的安全分析技术。这种化学分析方法消除了使用有毒和爆炸性的重氮甲烷，从而为监测生产溶剂萃取过程所需的常规分析提供了更安全的实验室技术。待分析的溶剂样品加上标有质量标记的氘代二丁基和单丁基磷酸酯，其作为内部标准。加入甲硅烷基化剂双三甲基甲硅烷基三氟乙酰胺后，将样品注入气相色谱/质谱仪中，测量标记内标与天然物质的比例，得到定量结果。

9. 发明授权

US5219533A Apparatus for solvent extraction process 失效
标题翻译：溶剂萃取工艺装置
公开(公告)号：US5219533A
公开(公告)日：1993-06-15
申请号：US793926
申请日：1991-11-18
申请人： Richard I. Larson
发明人： Richard I. Larson
IPC分类号： B01D11/04 , C22B60/02 , G21C19/46
CPC分类号： G21C19/46 , B01D11/043 , C22B60/026 , Y02W30/883
摘要： An apparatus for solvent extraction processes utilizing countercurrent flow of streams of an aqueous phase and an organic phase, such as the Purex process for uranium recovery. The invention comprises contouring the fluid passing orifices in the column phase dispersing perforated plates to impede droplet coalescence of the dispersed phase.

10. 发明授权

US4406410A Method and apparatus for adding and mixing second cohesive powders in a fluidized bed blender 失效
标题翻译：在流化床搅拌机中添加和混合第二粘性粉末的方法和装置
公开(公告)号：US4406410A
公开(公告)日：1983-09-27
申请号：US346874
申请日：1982-02-08
申请人： Richard I. Larson , Henry C. Brassfield , John T. Adomitis
发明人： Richard I. Larson , Henry C. Brassfield , John T. Adomitis
IPC分类号： B01F13/02 , B02C19/06 , B02C19/12
CPC分类号： B02C19/06 , B01F13/02 , B01F13/0294
摘要： A method and apparatus for the introduction of second cohesive powders into an improved fluidized bed blender containing UO.sub.2 powder, and for blending such second cohesive powders with the UO.sub.2 powder in the fluidized bed blender. The apparatus comprises an eductor, an improved pressurized vortec mill, a pneumatic conveying system that operates in turbulent flow, and an improved fluidized bed blender. The method and apparatus provide for injection and uniform dispersion of a second cohesive powdered ingredient or ingredients having hydrophobic, hydrophilic or hygroscopic properties in the fluid bed blender adjacent the bottom of the fluidized bed therein during the blending operation, thereby minimizing entrainment of the second powder mixture and providing a homogeneous blend of powders.
摘要翻译：一种用于将第二粘性粉末引入含有UO 2粉末的改进的流化床混合器中的方法和装置，并且用于在流化床混合器中将这种第二粘性粉末与UO 2粉末混合。该设备包括喷射器，改进的加压涡旋磨机，在湍流中操作的气动输送系统和改进的流化床搅拌器。该方法和装置在共混操作期间提供了在邻近流化床底部的流化床搅拌器中具有疏水性，亲水性或吸湿性的第二粘性粉末成分或成分的注射和均匀分散，从而最小化第二粉末的夹带混合物并提供均匀的粉末混合物。

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