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1. 发明专利

JP5787591B2 異物除去装置及び異物除去方法並びに酸化ウランペレット及び燃料集合体の製造方法有权
标题翻译：用于产生异物去除装置和异物去除方法，和铀氧化物颗粒和燃料组件的方法
公开(公告)号：JP5787591B2
公开(公告)日：2015-09-30
申请号：JP2011093641
申请日：2011-04-20
申请人：原子燃料工業株式会社
发明人：武田透 , 清水敦也 , 松井隆典
IPC分类号： G21C3/62 , B03C1/00 , B03C1/26 , B07B1/00 , C01G43/01 , G21C21/02
CPC分类号： Y02E30/38

4. 发明专利

JP2004257866A Treating method of waste liquid containing metal element and recovery method of metal element after treatment 审中-公开
公开(公告)号：JP2004257866A
公开(公告)日：2004-09-16
申请号：JP2003049131
申请日：2003-02-26
申请人： Mitsubishi Nuclear Fuel Co Ltd , 三菱原子燃料株式会社
发明人： HAMAGUCHI KAZUHIKO , SHIRATO WATARU
IPC分类号： G21F9/06 , B01J20/24 , C01G43/00 , C01G43/01 , C01G56/00 , C02F1/28 , G21F9/12
摘要： PROBLEM TO BE SOLVED: To provide a treating method of waste liquid containing a metal element capable of reducing a secondary waste generation quantity having a high concentration, and a recovery method of the metal element after treatment capable of recovering as an actinoid oxide having a low salt concentration.
SOLUTION: This treating method of the waste liquid containing the metal element includes a process 11 for neutralizing the waste liquid into a range of 2-3.5 of pH by adding and mixing an alkali solution containing NH
3 or NaOH so as not to generate flocculation precipitate with the waste liquid containing respectively the metal element having the concentration over 1g/l and nitric acid having the concentration over 1N, a process 12 for filling NH
3 type insoluble tannin inside a column, and a process 13 for allowing the neutralized waste liquid to pass through the column in which the NH
3 type insoluble tannin is filled to adsorb the metal element.
COPYRIGHT: (C)2004,JPO&NCIPI

6. 发明专利

JP3349750B2 失效
公开(公告)号：JP3349750B2
公开(公告)日：2002-11-25
申请号：JP4539993
申请日：1993-03-05
IPC分类号： B01J47/08 , B01J47/12 , C01G9/02 , C01G11/00 , C01G37/00 , C01G43/01 , C01G51/04 , C01G53/04 , C01G56/00 , C25B1/00

7. 发明专利

JP3225985B2 失效
公开(公告)号：JP3225985B2
公开(公告)日：2001-11-05
申请号：JP21125093
申请日：1993-08-26
IPC分类号： C01G43/01

8. 发明专利

JP2001056393A METHOD FOR URANIUM RECOVERY FROM SPENT OXIDE NUCLEAR FUEL 失效
公开(公告)号：JP2001056393A
公开(公告)日：2001-02-27
申请号：JP23240799
申请日：1999-08-19
申请人： SUMITOMO METAL MINING CO
发明人： SHIMIZU TAKAFUMI
IPC分类号： C01G43/01 , C22B9/02 , C22B60/02 , C25C3/34 , G21C19/44
摘要： PROBLEM TO BE SOLVED: To obtain a method recovering uranium as reusable pure uranium dioxide by removing impurity when plutonium is recovered from spent oxide nuclear fuel generated from a nuclear power station. SOLUTION: Spent nuclear oxide fuel and reducing agent sample 1a are chlorinated by blowing in chloric gas, into the molten salt dissolved by chloride of produced uranium and plutonium, liquid metal such as cadmium is contacted to extract and remove rare impurity elements, mixture gas of chlorine and oxygen is blown in the molten salt to make uranium be oxychloride and the uranium is sampled to recover pure uranium dioxide.

9. 发明专利

JPH11513967A 失效
公开(公告)号：JPH11513967A
公开(公告)日：1999-11-30
申请号：JP52181197
申请日：1996-12-12
IPC分类号： C01G43/025 , C01B13/34 , C01G43/00 , C01G43/01 , C01G56/00
摘要： PCT No. PCT/FR96/01993 Sec. 371 Date Mar. 2, 1999 Sec. 102(e) Date Mar. 2, 1999 PCT Filed Dec. 12, 1996 PCT Pub. No. WO97/21629 PCT Pub. Date Jun. 19, 1997A thermal decomposition method useful in the nuclear industry for preparing a powdered mixture of metal oxides having suitable reactivity from nitrates thereof in the form of an aqueous solution or a mixture of solids. According to the method, the solution or the mixture of solids is thermomechanically contacted with a gaseous fluid in the contact area of a reaction chamber, said gaseous fluid being fed into the reaction chamber at the same time as the solution or mixture at a temperature no lower than the decomposition temperature of the nitrates, and having a mechanical energy high enough to generate a fine spray of the solution or a fine dispersion of the solid mixture, and instantly decompose the nitrates. The resulting oxide mixtures may be used to prepare nuclear fuels.

10. 发明专利

JPH1179749A TREATMENT OF DEPLETED UF6 失效
公开(公告)号：JPH1179749A
公开(公告)日：1999-03-23
申请号：JP24405197
申请日：1997-09-09
申请人： MITSUBISHI MATERIALS CORP
发明人： NISHIDA TAKASHI , KIKUCHI TOSHIAKI
IPC分类号： C01G43/01
摘要： PROBLEM TO BE SOLVED: To lower the height of an apparatus, to simplify the apparatus and to treat depleted UF6 . SOLUTION: The treatment apparatus for the dipleted UF6 has a first fluidized bed reaction apparatus 11 which forms UO2 F2 and dilute hydrofluoric acid by acting steam to the dipleted UF6 and a second fluidizied bed reaction apparatus 12 which forms U3 O8 and dilute hydrofluoric acid by further acting the steam to the UO2 F2 . The first and second fluidized bed reaction apparatus are flat plate type fluidized bed reaction apparatus having plural chambers which are respectively formed as multiple stages. The reaction temp. of the first fluidized bed reaction apparatus is 230 to 280 deg.C and the reaction temp. of the second fluidized bed reaction apparatus is 600 to 700 deg.C. The dilute hydrofluoric acid formed by a dry process gaseous phase reaction is separated to hydrofluoric anhydride and dilute sulfuric acid by extraction distillation using concd. sulfuric acid. The dilute sulfuric acid is separated to low hydrofluoric acid water and concd. sulfuric acid by distillation thickening. The concd. sulfuric acid is used as the concd. sulfuric acid of the extraction distillation and the low hydrofluoric acid water is further distilled and is mixed as the hydrofluoric acid of an azeotropic compsn. with the dilute hydrofluoric acid in an extraction distillation stage.

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