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1. 发明专利

JPH0373898A RETREATMENT OF SPENT NUCLEAR FUEL 失效
公开(公告)号：JPH0373898A
公开(公告)日：1991-03-28
申请号：JP20967389
申请日：1989-08-15
申请人： CENTRAL RES INST ELECT , TOSHIBA CORP
发明人： TOKIWAI MORIYASU , KAKEHI ISAO , SUMIDA YUKIO , MATSUURA HIROYUKI
IPC分类号： G21C19/44
摘要： PURPOSE:To reduce the cost of processing and the amt. of waste by oxidizing the plutonium dissolved by cadmium. CONSTITUTION:Used metal fuel 1 is housed into a basket 2 consisting of ceramics, etc., and the basket is disposed in an electrolytic refining cell 3 so that the fuel is dissolved in the liquid cadmium 4. An electrolyte chloride 5 is disposed in the upper part of the cadmium 4 and an anode 6 is disposed in the cadmium 4 and a cathode 7 in the chloride 5. An electrolysis is then effected at about 480 deg.C to anodize the uranium and plutonium in the cadmium 4 and to move the same into the chloride 5. the moved chlorides of UCl3 and PuCl3 are reduced by the cathode 7 and are deposited in the form of U and Pu on the surface. A heater and a heat insulating material, etc. are provided in the bottom part 8 of the cell 3. The uranium and the plutonium are separated at a low temp. in such a manner, by which the cost of the processing is reduced and the amt. of the waste is decreased.

2. 发明专利

JPH04283700A REDUCING METHOD OF VOLUME OF LOW-LEVEL CONCENTRATED LIQUID WASTE 失效
公开(公告)号：JPH04283700A
公开(公告)日：1992-10-08
申请号：JP4676491
申请日：1991-03-12
申请人： TOSHIBA CORP
发明人： SHOJI YUICHI , MATSUURA HIROYUKI
IPC分类号： G21F9/06
摘要： PURPOSE:To enable sharp reduction of volume of low-level concentrated liquid waste and, in addition, to make a radioactive processing system closed by reusing a decomposition product. CONSTITUTION:Sodium nitrate in low-level concentrated liquid waste produced from reprocessing facilities for spent nuclear fuel is decomposed into a nitric acid 32 and a sodium hydroxide 33 by an electrolytic treatment 31 in an electrolytic cell equipped with an anionic exchange film and a cationic exchange film, and they are separated and collected respectively and reused in the reprocessing facilities.

3. 发明专利

JPH06311016A BUFFER DRIVE CAPABILITY CHANGEOVER CIRCUIT 失效
公开(公告)号：JPH06311016A
公开(公告)日：1994-11-04
申请号：JP9154593
申请日：1993-04-19
申请人： TOSHIBA CORP , TOSHIBA MICRO ELECTRONICS
发明人： MATSUURA HIROYUKI , TAKAHASHI HISATO
IPC分类号： G06F3/00 , G11C11/409 , H01L21/82 , H01L21/822 , H01L27/04 , H03K19/0175
摘要： PURPOSE:To provide a buffer drive capability changeover circuit in which a drive capability of a buffer is set optimizingly in the stage of manufacture or in the operation after the manufacture depending on the system. CONSTITUTION:The circuit is provided with a buffer circuit 13 comprising buffers (1)-(n) connected in parallel receiving a signal from an input terminal 11 and outputting the signal externally from an output terminal 12, a switching circuit 14 connected in series between the buffer circuit 13 and the output terminal 11 and a control circuit 15 controlling the switching state of the switching circuit 14 and the buffer driver capability is switched between the input terminal 11 and the output terminal 12 by making at least either of the buffers (1)-(n) conductive between the input terminal 11 and the output terminal 12.

4. 发明专利

JPH04126525A DEHYDRATING DEVICE 失效
公开(公告)号：JPH04126525A
公开(公告)日：1992-04-27
申请号：JP24718390
申请日：1990-09-19
申请人： TOSHIBA CORP
发明人： SHOJI YUICHI , MATSUURA HIROYUKI , WADA MIKIO
IPC分类号： B01D61/56 , C02F11/12
摘要： PURPOSE:To dehydrate waste sludge with a static action without any driving part by providing a cation-exchange membrane on the wall of an anode chamber and a cation-exchange membrane and a porous membrane on the wall of a cathode chamber. CONSTITUTION:A cylindrical water collecting pipe 2 is hung at the center in a cylindrical vessel 1, a cathode 11 is provided outside the upper part of the pipe 2, a cathode chamber 13 is formed by a cathode cylinder 12 extending from the cathode 11, and the cation-exchange membrane 14 and a porous membrane 15 adjacent to each other are stuck on the cylinder 12. An anode 16 is provided outside the cathode 11, an anode chamber 18 is formed by the anode and an anode cylinder 17 extending from the anode 16, and a cation- exchange membrane 19 is stuck on the cylinder 17. Sludge is charged into the anode chamber 18 in the vessel 1 which is energized, hence the Na in the sludge entraining water molecule is moved to the cathode and passed through the porous membrane, however the sludge is not passed through the cation- exchange membrane and dehydrated.

5. 发明专利

JPH0493798A STABILIZING TREATMENT OF RADIOACTIVE WASTE 失效
公开(公告)号：JPH0493798A
公开(公告)日：1992-03-26
申请号：JP20917190
申请日：1990-08-09
申请人： TOSHIBA CORP
发明人： MATSUURA HIROYUKI , TOYOHARA NAOMI , FUJIE MAKOTO , SATO TATSUAKI
IPC分类号： G21F9/08 , G21F9/10 , G21F9/16
摘要： PURPOSE:To enable producing a solidified body which is favorable for safety evaluation thereof by adding a sodium carbonate to a radio-active liquid waste, by applying pretreatment that is to change carbonate ion of a radioactive nuclide, C-14, which exists in a soluble condition in the liquid, to a calcium carbonate, by a slake lime or a quick lime as well as to refractory carbonate, at the same time, and also by applying drying-up treatment and solidification. CONSTITUTION:Concentrated readioactive liquid waste is pre-treated by a sodium carbonate. Soluble cabonate ion existing in a form of a sodium cabonate in the liquid waste, is changed to a calcium carbonate and to a refractory condition into water. However, since an amount of the carbonate ion containing a radioactive nuclide, C-14, is extremely small, the cabonate reaches its solubility and therefore there is some possibility to be dissolved into water, even if such a pre-treatment is applied. Accordingl, a sodium carbonate is previously added to the extent that the solubility of the calcium carbonate is well exceeded, and there with the carbonate ion containing the nuclide, C-14, co-precipitates with the added carbon ion ad then can be changed to almost insoluble one into water. Finally, the ion is treated by a plastic solidification process or a pelletizing treatment.

6. 发明专利

JPH03150499A SOLIDIFICATION OF RADIOACTIVE WASTE 失效
公开(公告)号：JPH03150499A
公开(公告)日：1991-06-26
申请号：JP28977489
申请日：1989-11-07
申请人： TOSHIBA CORP , TOSHIBA CERAMICS CO , TOSHIBA ENGINEERING CO
发明人： TOYOHARA NAOMI , SUEFUJI KUMIKO , MATSUURA HIROYUKI , MATSUO KAZUAKI , TAKAHARA NOBUAKI
IPC分类号： G21F9/30
摘要： PURPOSE:To obtain a solidified body having uniform quality and good characteristics by adding an electrolyte together with a hydraulic inorg. solidifying material to used ion exchange resin pellets, thereby solidifying the pellets. CONSTITUTION:The used ion exchange resin pellets 1 formed by drying the used ion exchange resins generated in facilities where radioactive materials are handled, then pelletizing the resins are mixed with the electrolyte together with the hydraulic inorg. solidifying material and the mixture is solidified. The hydraulic inorg. solidifying material to be used is exemplified by, for example, Portlant cement, alumina cement, water glass, etc. One or >=2 kinds selected from sulfate, nitrate, carbonate, lactate, phosphate, and halide are preferably mixedly used as the electrolyte. The hardening of the hydraulic inorg. solidifying material is accelerated and the swelling of the used ion exchange resin pellets 1 by absorption of water is suppressed by the addition of the electrolyte. The solidified body having the uniform quality and the good characteristics is obtd. in this way.

7. 发明专利

JPH01199197A TREATING METHOD FOR RADIOACTIVE WASTE SLUDGE 失效
公开(公告)号：JPH01199197A
公开(公告)日：1989-08-10
申请号：JP2270688
申请日：1988-02-04
申请人： NIPPON ATOMIC IND GROUP CO , TOSHIBA CORP
发明人： SHOJI YUICHI , MATSUURA HIROYUKI , ICHIHASHI TOSHIO
IPC分类号： G21F9/06 , G21F9/00 , G21F9/16
摘要： PURPOSE:To plan the improvement of volume reduction by dehydrating radioactive waste sludge in a vessel by the use of an electroendosmose method and solidifying dehydrated solid material as it is in the vessel. CONSTITUTION:For example, mesh electrodes 2, 2' made of stainless steel are oppositely set in a vessel 1 up and down and a filter cloth is combined on the lower electrode 2' to set. When imitation sludge is introduced between the electrodes 2, 2' and DC voltage of 15V is applied to continue the treatment for 60min, water passes through the filter cloth 3, further exhausted from an outlet 4 through the electrode 2' and final dehydration rate becomes 55%. Further, the volume is reduced up to a quarter. The sludge dehydrated and treated by the electroendosmose method is lowered in water content as compared with a mechanical filter treatment, solidification is performed by the use of cement and the like in the easily dehydrated and treated vessel and the volume reduction is improved.

8. 发明专利

JPS61132898A Method of solidying and treating radioactive waste 失效
标题翻译：固化和处理放射性废物的方法
公开(公告)号：JPS61132898A
公开(公告)日：1986-06-20
申请号：JP25453284
申请日：1984-11-30
申请人： Nippon Atomic Ind Group Co , Toshiba Corp
发明人： TOYOHARA NAOMI , MATSUURA HIROYUKI , KAWANISHI NORIO , TAGA JUNICHI
IPC分类号： G21F9/16 , G21F9/00 , G21F9/30

9. 发明专利

JPS6182200A Method and device for solidifying and treating radioactive waste 失效
公开(公告)号：JPS6182200A
公开(公告)日：1986-04-25
申请号：JP20386684
申请日：1984-09-28
申请人： Nippon Atomic Ind Group Co , Toshiba Corp
发明人： TOYOHARA NAOMI , MATSUURA HIROYUKI
IPC分类号： G21F9/16 , G21C19/46 , G21F9/00
CPC分类号： Y02W30/883

10. 发明专利

JPS6179199A Method and device for solidifying and treating radioactive waste 失效
标题翻译：用于固化和处理放射性废物的方法和装置
公开(公告)号：JPS6179199A
公开(公告)日：1986-04-22
申请号：JP20266084
申请日：1984-09-27
申请人： Nippon Atomic Ind Group Co , Toshiba Corp
发明人： MATSUURA HIROYUKI , TOYOHARA NAOMI
IPC分类号： G21F9/16 , G21F9/00 , G21F9/30

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