专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

71. 发明专利

JPH08271692A PROCESSING METHOD FOR RADIOACTIVE WASTE LIQUID 失效
公开(公告)号：JPH08271692A
公开(公告)日：1996-10-18
申请号：JP6951795
申请日：1995-03-28
申请人： TOSHIBA CORP
发明人： TOYOHARA NAOMI , MIKURA MICHITAKA , FUJIHATA KENJI , KANEKO MASAAKI , WADA MIKIO , OKANO TOSHIAKI
IPC分类号： G21F9/06 , B01D61/44 , B01J20/18 , C02F1/469 , G21F9/10 , G21F9/12
摘要： PURPOSE: To enable reusing neutral salt in a radioactive material treatment facility by decomposing the neutral salt in waste liquid after removing radioactive nuclides into acid and alkali by electric dialysis and recovering them. CONSTITUTION: Waste liquid containing radioactive nuclides is contained in a pH controlling tank 1, acid is supplied from an acid supply tank 2 and pH of the waste liquid is controlled with a pH meter at 5 or less, and the liquid is transported to a coprecipitation reaction tank 4. To this tank, coprecipitation agents, phosphoric acid ion, lanthanum and alkali, 5 to 7, are supplied. At this moment, the supply amount of alkali is monitored with a pH meter 8 to control the waste liquid after adding the coprecipitation agent at pH3 or higher to let the coprecipitation agent precipitate and let the deposition take in TRU nuclides. The waste liquid containing the deposition is filtered with a filter 9 to make the deposition condensed sludge. The waste liquid removed of TRU nuclides together with the deposition is transported to an ion exchanging tower 11 charged with zeolite to remove Cs and tentatively stored in a reservoir tank 12. Then part of the waste liquid is transported to a waste liquid circulation tank 13 and the salt in the waste liquid is decomposed into acid and alkali with an electric dialyzer 14.

72. 发明专利

JPH05346493A 失效
公开(公告)号：JPH05346493A
公开(公告)日：1993-12-27
申请号：JP15682292
申请日：1992-06-16
申请人： TOSHIBA CORP , TOA GOSEI CHEM IND
发明人： TOYOHARA NAOMI , MIKURA MICHITAKA , WADA MIKIO , AIBA NOBUHIKO , IINUMA TOMOHISA , KATO HIDEKI
IPC分类号： G21F9/12 , B01J41/10
摘要： PURPOSE:To make suppressing resolution of radioactive nuclei for a long time possible by selectively absorbing ion including radioactive iodine and/or technetium with using an absorption processing agent constituted of inorganic ion exchanger. CONSTITUTION:Waste generated from a reactor facility is brought into contact with an absorption treating agent constituted of an inorganic ion exchanger. And ions including radioactive nuclei iodine and/or technetium as structure atoms is selectively absorbed and fixed. As for inorganic ion exchanger, one including at least one of dismuth nitrate hydroxide (III), dismuth nitrate hydroxide (III) expressed with the equation I, complex oxide of aluminum and magnesium expressed with the equation II and zirconium hydrate, or one of them and antimony hydrate combination are used. As the inorganic ion exchanger including the radioactive iodine and technetium obtained in this process is a stable compound, it does not release the nuclei again after the treatment.

73. 发明专利

JPH05188188A REMOVAL OF TECHNETIUM FROM PLUTONIUM 失效
公开(公告)号：JPH05188188A
公开(公告)日：1993-07-30
申请号：JP504692
申请日：1992-01-14
申请人： TOSHIBA CORP
发明人： MIKURA MICHITAKA , SHIOMI HIROMI
IPC分类号： G21C19/46
摘要： PURPOSE:To separate and remove technetium out of nitric acid solution containing plutonium of III valences and the technetium in the solvent extracting method using TBP. CONSTITUTION:The ions of Zr , Th , Sc and the like are added into nitric acid solution of Pu and Tc after the separation of uranium and plutonium in a reprocessing step. Thus, solvent extraction with TBP is performed. At this time, technetium is extracted with TBP (organic phase) together with the added metal ions. The plutonium remains in the water phase. After this operation, the phases are separated, and the plutonium-nitric acid solution, from which the technetium is removed, is obtained.

74. 发明专利

JPH10132997A METHOD OF SOLIDIFYING RADIOACTIVE WASTE, AND DEVICE THEREFOR 失效
公开(公告)号：JPH10132997A
公开(公告)日：1998-05-22
申请号：JP28694896
申请日：1996-10-29
申请人： TOSHIBA CORP , TOSHIBA ENGINEERING CO
发明人： SATO TATSUAKI , TOYOHARA NAOMI , MIKURA MICHITAKA , ISHII TOMOHARU
IPC分类号： G21F9/16 , G21F9/30
摘要： PROBLEM TO BE SOLVED: To provide a solidified body excellent in stability and durability over a long period by adding an additive for making a main component dissolved in a waste liquid insoluble to the waste liquid containing a radioactive waste to dehydrate it. SOLUTION: A radioactive waste such as boric acid-contained waste liquid or phosphoric acid-contained waste liquid is put in a storage tank 1, and a Ca compound or Ma compound making boric acid or phosphoric acid which is the main component of the waste liquid insoluble is supplied from a feeding mechanism 2 to the storage tank 1. The waste liquid whose main component is made insoluble is dehydrated by a dehydrating machine 3, and the dry powder or slurry is kneaded with a cement hydraulic inorganic solidifying agent by a kneader 4. A transfer machine 6 puts the kneaded mixture into a disposing vessel 5. Thus, a condensed waste liquid mainly composed of boric acid or waste solvent oxidized product mainly composed of phosphoric acid which is produced from a nuclear power plant can be satisfactorily dehydrated and reduced in capacity without causing crystallization, and easily solidified without causing causing coagulation delay.

75. 发明专利

JPH08201585A SOLIDIFICATION MATERIAL OF RADIOACTIVE IODINE AND STABILIZATION METHOD 失效
公开(公告)号：JPH08201585A
公开(公告)日：1996-08-09
申请号：JP1362795
申请日：1995-01-31
申请人： TOSHIBA CORP
发明人： KANEKO MASAAKI , TOYOHARA NAOMI , MIKURA MICHITAKA , WADA MIKIO
IPC分类号： G21F9/16 , G21F9/30
摘要： PURPOSE: To stabilize radioactive iodine in a stable compound for a long term without dependency on iodine concentration. CONSTITUTION: This cement solidification material consists of alumina cement of 20 to 90wt.% and calcium compound for the rest. with this solidification material, iodine can be stabilized in a monosulphate type compound (3CaO.Al2 O3 .CaI2 .mH2 O). Since the main component of cement based solidification material is calcium aluminate, the dependency on iodine concentration is low.

76. 发明专利

JPH07256091A MATERIAL AND METHOD FOR FIXING RADIOACTIVE IODINE 失效
公开(公告)号：JPH07256091A
公开(公告)日：1995-10-09
申请号：JP5181894
申请日：1994-03-23
申请人： TOSHIBA CORP
发明人： KANEKO MASAAKI , TOYOHARA NAOMI , MIKURA MICHITAKA , WADA MIKIO
IPC分类号： G21F9/02 , B01J20/02 , C04B7/26
摘要： PURPOSE:To obtain iodine fixed matter stable over a long period of time while improving the adsorbability of radioactive iodine. CONSTITUTION:A cementitious hydraulic fixing material high in the adsorbability of radioactive iodine consists of 50-100% of a hydraulic inorg. compd. and the remainder of fly ash. This fixing material is brought into contact with radioactive iodine contained in a soln. and a radioactive iodine adsorbed substance is taken out by solid-liquid separation to obtain iodine fixed matter.

77. 发明专利

JPH04136799A REMOVAL METHOD OF GAS-LIKE VOLATILE RADIOACTIVE SUBSTANCE 失效
公开(公告)号：JPH04136799A
公开(公告)日：1992-05-11
申请号：JP25694990
申请日：1990-09-28
申请人： TOSHIBA CORP
发明人： MIKURA MICHITAKA , IMOTO YOSHIE
IPC分类号： G21F9/02 , G21F9/00
摘要： PURPOSE:To effectively make possible the removal of all volatile radioactive substances existing as a gas by cooling to solidify the volatile radioactive substances to remove solid-like particles with the use of a solid particle removal device. CONSTITUTION:As the reason in which all volatile radioactive substances existing as a gas cannot be effectively removed with the use of a existing waste gas disposal device, it is mentioned that these states are gas. In order to lessen a quantity of gas volatile radioactive substances, saturated vapor pressure of each chemical species is preferably lowered. The invention aims at a point where the saturated vapor pressure of each chemical species lowers by lowering of the temperature to solidify the volatile radioactive substances with the use of a cooler 1 provided at the front stage so as to remove them with the use of a solid particle removal device 2 provided at the rear stage. Thereby gas-like volatile radioactive substances can be effectively removed.

78. 发明专利

JP2002131482A MATERIAL AND METHOD FOR FIXING RADIOACTIVCHLORINE 失效
公开(公告)号：JP2002131482A
公开(公告)日：2002-05-09
申请号：JP2000324447
申请日：2000-10-24
申请人： TOSHIBA CORP , TOSHIBA ENGINEERING CO
发明人： MIKURA MICHITAKA , MURATA EIICHI , KANEKO MASAAKI , TAKAHASHI RIYOUTA , NAKAJIMA ATSUSHI
IPC分类号： G21F9/30 , B09B3/00 , C04B7/32 , C04B18/04 , C04B22/12 , C04B28/06 , C04B28/08 , G21F9/16
摘要： PROBLEM TO BE SOLVED: To provide a material and a method for fixing radioactivchlorine which adsorb a lot of it and can fix chlorine stably. SOLUTION: This solidifying material of radioactivchlorine includes alumina cement of 15 to 17 wt.% and the remaining is made of a calcium compound. The alumina cement is made of at least one selected from the first, second, third, fourth and fifth categories in the Japan Industrial Standards(JIS). The calcium compound is composed of at least one selected from calcium hydroxide, (Ca(OH)2), calcium oxide(CaO), calcium carbonate(CaCO3), calcium sulfate(CaSo4), calcium sulfite(CaSO3) and calcium nitrate(Ca(No3)2).

79. 发明专利

JP2000304897A FORMING METHOD FOR TARGET FOR RADIOIODINE EXTINCTION 失效
公开(公告)号：JP2000304897A
公开(公告)日：2000-11-02
申请号：JP11435599
申请日：1999-04-22
申请人： TOSHIBA CORP , TOSHIBA ENGINEERING CO
发明人： MIKURA MICHITAKA , KANEKO MASAAKI , HIRAYAMA FUMIO , IKENAGA NOBUYUKI
IPC分类号： B09B3/00 , B01D15/00 , B09B5/00 , C02F1/70 , G21F9/00 , G21F9/10 , G21F9/30
摘要： PROBLEM TO BE SOLVED: To collect iodine into a solution from a silver adsorbing material containing radioiodne generated from nuclear facilities without volatilizing it, and to form a target for radioiodine extinction by use of a precipitation reaction. SOLUTION: A reducing agent for reducing silver is added to collect iodine into a liquid from spent silver adsorbing material containing a lot of radioiodine. After the addition of the reducing agent, solid-liquid separation 3 is executed, a solution 5 wherein iodine is desorbed from a solid phase 4 is collected, then an oxidation treatment for the excessive reducing agent remaining in the solution is executed. Next, metal ions (Cu2+, Pb2+, Bi3+ or the like) easy to form insoluble compounds with iodine ions are added to precipitate and form 8 an iodine compound as a target for iodine extinction. Thereby, iodine for forming the target can be safely treated in the solution without volatilizing it.

80. 发明专利

JPH10160887A MONITOR CONTROLLING SYSTEM FOR WATER LEVEL IN REACTOR PRESSURE VESSEL 失效
公开(公告)号：JPH10160887A
公开(公告)日：1998-06-19
申请号：JP33315696
申请日：1996-11-29
申请人： TOSHIBA CORP
发明人： NISHIDA TSUTOMU , MATSUHASHI YOSHINORI , MIKURA MICHITAKA
IPC分类号： G01F23/28 , G21C17/00 , G21C17/02 , G21C17/035
摘要： PROBLEM TO BE SOLVED: To control water level in pressure vessel measured accurately by measuring with reflection time of ultrasonic during regular inspection work of reactor and monitoring the detected water level. SOLUTION: An ultrasonic displacement sensor 1 and a temperature sensor 2 are fixed to a reactor pressure vessel head 4. The water level output of the ultrasonic displacement sensor 1 is input in an amplifier unit 3 for measuring, the temperature output of the temperature sensor 2 is also input in the unit 3 and the output of the ultrasonic displacement sensor 1 is compensated for temperature. The water level output and temperature output are input in a monitoring unit 9 via the unit 3 to monitor. In the work area 7 in well in the vicinity of reactor pressure vessel, a dose equivalent meter 8 is provided to detect dose equivalent, which is monitored with the monitoring unit 9. In this manner, water level can be remotely controlled at the upper part of steam dryer 5 by accurately measuring the water level. Thus, the amount of work and exposure of workers can be reduced.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式