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61. 发明专利

JPH0274529A METHOD FOR DEACTIVATING URANIUM OXIDE FOR PREVENTING OXIDATION AND OBTAINED OXIDATION-RESISTANT URANIUM OXIDE PRODUCT 失效
公开(公告)号：JPH0274529A
公开(公告)日：1990-03-14
申请号：JP21024189
申请日：1989-08-16
申请人： GEN ELECTRIC
发明人： RICHIYAADO INGUWARUDO RAASON , RICHIYAADO POORU RINGURU , JIYON RII HAAMON
IPC分类号： C01G43/01 , C01G43/025 , G21C3/62

62. 发明专利

JPH0273193A MANUFACTURE OF NUCLEAR FUEL PELLET PREPARING AND UTILIZING SINTERABLE FLUID POWDER DIRECTLY OBTAINED BY PRECIPITATION OF PEROXIDE 失效
公开(公告)号：JPH0273193A
公开(公告)日：1990-03-13
申请号：JP17891589
申请日：1989-07-11
申请人： PECHINEY URANIUM
发明人： ANTOWAANU FUROREANSHI , POORU MORAARU
IPC分类号： C01B15/047 , C01F15/00 , C01F17/00 , C01G27/02 , C01G43/01 , C01G56/00 , C04B35/64 , G21C3/62
摘要： PURPOSE: To eliminate the need of complementary adjusting treatment, such as the milling, screening, granulation, etc., by treating the initial solution of a soluble salt of one or more elements with hydrogen peroxide and settling a peroxide suspended in a mother liquor. CONSTITUTION: The method for manufacturing nuclear fuel pellets is composed of a plurality of steps, and the method is started with the solution of a soluble salt of one or more metals or elements M for forming final sintered oxide pellets. A nitrate is specially preferable as the soluble salt and a peroxide is settled while the peroxide is suspended in a mother liquor by treating the solution of the nitrate with hydrogen peroxide and an ammonia solution. The solid is separated form the solution and washed and, thereafter, the obtained solid powder is calcined to an oxide and the oxide is reduced in a atmosphere containing hydrogen and nitrogen in a furnace. After all agglomerates formed during the heat treatment are removed from the reduced powder, green pellets are obtained by molding the powder with pressure and the pellets are sintered. The settled powder does not require any adjusting operations, such as the milling, particle size distribution adjusting operation, granulation, etc.

63. 发明专利

JPS6321228A DEVICE FOR PRODUCING OXIDE POWDER 失效
公开(公告)号：JPS6321228A
公开(公告)日：1988-01-28
申请号：JP16277886
申请日：1986-07-10
申请人： NIPPON NUCLEAR FUELS
发明人： OMURA NAOTAKA , YAMATO KEIJI
IPC分类号： B02C21/00 , C01B13/14 , C01G43/01 , C03B13/14 , G21C21/02
摘要： PURPOSE:To produce the title oxide powder from sintered pellets in a short time by coarsely crushing the pellets, oxidizing the material in a heat-treating furnace, pulverizing the material, and screening the material with a classifier at the time of producing the oxide powder from sintered pellets. CONSTITUTION:The sintered pellets in a raw material supply can 1 hung from a balance loader 2 are supplied into a supply hopper 3, and the pellets are charged in a coarse crusher 5 through a feeder 4 and crushed. The crushed pellets are dropped onto a belt conveyor 7 in a heat-treating device 6 and oxidized while being traveled in the heat-treating device 6. The oxidized powder is supplied into a pulverizer 8 and pulverized, and then supplied to the classifier 9 wherein product powder having coarser particle size an the powder having specified particle size are separated. The powder having specified particle size is supplied to a product can 11 by a feeder 10, and weighed by a weighing device 12 to a specified weight. The powder coarser than the specified size is supplied to a storage can 13. Oxide powder can be produced in a short time from sintered pellets by this device.

64. 发明专利

JPS631248B2 失效
公开(公告)号：JPS631248B2
公开(公告)日：1988-01-12
申请号：JP3458981
申请日：1981-03-12
申请人： TOKYO SHIBAURA ELECTRIC CO
发明人： MATSUMARU KENICHI
IPC分类号： C01G43/01 , B01J19/12 , C01G56/00 , H05B6/80

65. 发明专利

JPS623095B2 失效
公开(公告)号：JPS623095B2
公开(公告)日：1987-01-23
申请号：JP8204281
申请日：1981-05-29
申请人： MITSUBISHI METAL CORP
发明人： TANAKA AKIRA , ONOSHITA TOSHIO , TANAKA KATSUYUKI
IPC分类号： C01G43/01 , C01G43/00 , C01G56/00 , G21C19/46 , G21C19/48

66. 发明专利

JPS623093B2 失效
公开(公告)号：JPS623093B2
公开(公告)日：1987-01-23
申请号：JP12477679
申请日：1979-09-29
申请人： TOKYO SHIBAURA ELECTRIC CO
发明人： MATSUMARU KENICHI
IPC分类号： C01G43/01 , B01J19/12 , C01G56/00

67. 发明专利

JPS6144811B2 失效
公开(公告)号：JPS6144811B2
公开(公告)日：1986-10-04
申请号：JP6892581
申请日：1981-05-08
申请人： MITSUBISHI METAL CORP
发明人： TANAKA AKIRA , ONOSHITA TOSHIO , TANAKA KATSUYUKI
IPC分类号： B01J8/24 , B01J8/44 , C01G43/01 , C01G56/00

68. 发明专利

JPS61197424A PRODUCTION OF URANIUM OXIDE FROM URANIUM HEXAFLUORIDE 失效
公开(公告)号：JPS61197424A
公开(公告)日：1986-09-01
申请号：JP3666385
申请日：1985-02-27
申请人： MITSUBISHI METAL CORP
发明人： TANAKA AKIRA , UMEMURA AKIO , KURAMOTO EITARO , KIKUCHI TOSHIAKI
IPC分类号： C01G43/025 , C01G43/01 , G21C3/62
摘要： PURPOSE:To reduce the residual fluorine content in uranium oxide, and to impart high activity to the oxide, by carrying out the dry conversion of uranium hexafluoride to uranium oxide powder suitable as a nuclear reactor fuel preventing the contact of UF6 gas with hydrogen gas. CONSTITUTION:UF6 or a mixture of UF6 and a carrier gas is introduced together with steam into the first reaction zone at a molar flow ratio (steam/ UF6) of >2 to effect the hydrolysis of UF6 to UO2F2. The obtained UO2F2 is mixed with a hydrogen-containing gas, and the mixture is further mixed with an oxygen-containing gas and introduced into the second reaction zone. The combustion of the hydrogen-containing gas and the oxygen-containing gas takes place in the second reaction zone, and UO2F2 is converted to a composition rich in uranium oxide in the presence of the generated active flame.

69. 发明专利

JPS6128732B2 失效
公开(公告)号：JPS6128732B2
公开(公告)日：1986-07-02
申请号：JP141779
申请日：1979-01-12
申请人： AMAX INC
发明人： JON EMU RAFUAATEI , JEEMUZU ERU JONSON , BUREAA TEII BAAUERU
IPC分类号： C22B34/34 , C01B31/08 , C01G39/00 , C01G43/00 , C01G43/01 , C22B60/02

70. 发明专利

JPS6186402A Process for recovering anhydrous hydrogen fluoride from deteriorated uf6 and reutilizing thereof 失效
标题翻译：从去除的UF6中回收氢氟酸的方法及其回收
公开(公告)号：JPS6186402A
公开(公告)日：1986-05-01
申请号：JP20556684
申请日：1984-10-02
申请人： Mitsubishi Metal Corp , Power Reactor & Nuclear Fuel Dev Corp
发明人： SASAO NOBUYUKI , TANAKA AKIRA , UMEMURA AKIO
IPC分类号： C01G43/01 , C01B7/19 , C01B9/08 , C01G43/06
摘要： PURPOSE: To recover HF having high purity inexpensively without producing almost no secondary wastes by transforming deteriorated UF
6 to U≥3O
8 by the gaseous phase reaction by the dry process and recovering by-produced dil. HF in the form of anhydrous HF by the sulfuric acid extraction process.
CONSTITUTION: Waste deteriorated UF
6 is vaporized in a vaporizer 1, introduced into a fluidized bed reaction furnace 2. A gaseous phase reaction is caused by the steam 11 from the bottom of the reactor generating particles of UO
2 F
2 and a fluidized bed is formed. The UO
2 F
2 particles are overflowed over the top of the fluidized bed, into a second fluidized bed reaction furnace 3 where it is transformed to U
3 O
8 by the steam contained in the waste gas from a third fluidized bed reaction furnace 4, overflowed to the third fluidized bed reaction furnace 4, defluorinated by the steam 12, and the product is received in a U
3 O
8 eceiver 5. By-produced HF discharged from the reaction furnace 2, 3 is collected in a condenser 6 to form dil. HF having high concn., and is transferred to an extraction distillation tower 7. H
2 SO
4 14 is fed to the tower, and anhydrous HF is recovered from the top of the tower by the extraction distillation, condensed in a condenser 8 and received by a receiver 9. Dil. H
2 SO
4 13 is recovered from the bottom of the tower, and recycled to the extraction distillation tower 7 through a concentration tower 10.
COPYRIGHT: (C)1986,JPO&Japio
摘要翻译：目的：通过干法处理气相反应并回收副产的稀释剂，通过将劣化的UF6转化为U> = 3O8来回收廉价的高纯度的HF，几乎不产生二次废物。 HF以无水HF的形式通过硫酸提取过程。构成：废气劣化UF6在蒸发器1中蒸发，引入流化床反应炉2.气相反应由反应器底部的蒸汽11引起，产生UO2F2颗粒，形成流化床。 UO2F2颗粒在流化床的顶部溢出，进入第二流化床反应炉3，在其中通过包含在来自第三流化床反应炉4的废气中的蒸汽转化成U3O8，溢流到第三流化床反应炉4，由蒸汽12脱氟，产物被接收在U3O8收发器5中。从反应炉2,3排出的副产HF被收集在冷凝器6中以形成稀释。高浓度的HF，并被转移到提取蒸馏塔7.将H 2 SO 4 14进料到塔中，通过萃取蒸馏从塔的顶部回收无水HF，在冷凝器8中冷凝并被接收器戴尔从塔底回收H 2 SO 4 13，并通过浓缩塔10再循环至萃取蒸馏塔7。

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