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1. 发明专利

JP2000284092A METHOD AND DEVICE FOR TREATING WASTE CONTAINING BORON 失效
公开(公告)号：JP2000284092A
公开(公告)日：2000-10-13
申请号：JP2000016776
申请日：2000-01-26
申请人： TOSHIBA CORP , TOSHIBA ENGINEERING CO
发明人： TOYOHARA NAOMI , SATO TATSUAKI , NODA TETSUYA , SUZUKI NORIKO , TAKAMATSU YOSHINARI
IPC分类号： G21F9/16 , G21F9/08
摘要： PROBLEM TO BE SOLVED: To make it possible to prevent a liquid waste line from clogging by keeping the temperature to the point of adding a compound of alkali metal elements and that of an alkaline earth metal element to a liquid waste containing boron, and drying and powdering a mixture of them at the deposition temperatures of boron and both compounds or higher. SOLUTION: After a radioactive liquid waste 1 containing boric acid as a main constituent that is generated in a nuclear power plant is heated 2 at the temperature of 80 deg.C or higher, the liquid waste 1 is neutralized by adding a compound 3 of alkali metal elements such as Na and K to the liquid waste. Moreover, the boric acid as the main constituent is insolubilized by adding a compound 4 of alkaline earth metal elements such as Ca and Mg to the liquid waste 1. Then, a liquid waste containing an insoluble compound of a boric acid (a liquid waste containing an insoluble boric acid) obtained in the previous process is supplied to a dryer while keeping the temperature of the liquid waste at 80 deg. C or higher, a drying treatment 5 is carried out for the liquid waste to convert it to dried powder 6 and the volume of it is reduced. In this process, the sedimentation velocity of insoluble borate in the liquid waste can be reduced by keeping the temperature of the liquid waste at 80 deg.C or higher, which makes it possible to prevent a liquid waste line from clogging. The dried powder 6 is solidified in concurrence with a cementitions material.

2. 发明专利

JP2002139595A RADIOACTIVE WASTE LIQUID DISPOSAL SYSTEM 失效
公开(公告)号：JP2002139595A
公开(公告)日：2002-05-17
申请号：JP2000330348
申请日：2000-10-30
申请人： TOSHIBA ENGINEERING CO , TOSHIBA CORP
发明人： ISHII TOMOHARU , NODA TETSUYA
IPC分类号： G21F9/06 , G21F9/04 , G21F9/28
摘要： PROBLEM TO BE SOLVED: To shorten the disposal time and improve the reliability of filtrate quality by monitoring the state of a cake layer formed within a filter. SOLUTION: A pump 2 and the filter 3 are connected to a radioactive waste liquid collecting tank 1 through piping. A turbidmeter 8 is set in the filtrate discharging pipe 18 of the filter 3. The outlet side of the turbidmeter 8 is connected to a sump tank 4 through a sump tank inlet valve 21. The sump tank inlet valve 21 is remotely opened and closed by a measurement control device 11. One side of a return pipe 5 branched from the sump tank inlet valve 21 is connected to the outlet side of the turbidmeter 8, and the other is connected to the collecting tank 1. A collecting tank return valve 20 remotely opened and closed by the measurement control device 11 is set in the return pipe 5. A cake discharge valve 19 is connected to the cake discharge side of the filter 3, and a metal drum 6 is connected to the downstream side from the cake discharge valve 19. A powdery activated charcoal feeder 7 is connected to the collecting tank 1.

3. 发明专利

JPH0996697A RADIOACTIVE WASTE LIQUID TREATING UNIT 失效
公开(公告)号：JPH0996697A
公开(公告)日：1997-04-08
申请号：JP25478995
申请日：1995-10-02
申请人： TOSHIBA CORP , TOSHIBA ENGINEERING CO
发明人： NODA TETSUYA , TAKAHARA NOBUAKI , HARA SATOMI
IPC分类号： G21F9/04
摘要： PROBLEM TO BE SOLVED: To discharge a waste sludge while conditioning the concentration thereof in a sludge tank continuously and to prevent clogging of a draw-out pipe. SOLUTION: The radioactive waste liquid treating unit comprises a storage tank 11 receiving radioactive waste liquid containing waste sludge, a nozzle 12 disposed in the sludge storage tank 11 in order to draw out the waste sludge, a nozzle 14 disposed closely to the sludge draw out nozzle 12 in order to dilute the waste sludge, and a jet nozzle 13 disposed closely to the sludge draw out nozzle 12 in order to stir the waste sludge.

4. 发明专利

JPH1062595A RADIOACTIVE WASTE LIQUID PROCESSING DEVICE 失效
公开(公告)号：JPH1062595A
公开(公告)日：1998-03-06
申请号：JP21819796
申请日：1996-08-20
申请人： TOSHIBA ENGINEERING CO , TOSHIBA CORP
发明人： HARA SATOMI , NODA TETSUYA
IPC分类号： G21F9/10
摘要： PROBLEM TO BE SOLVED: To make a backwash operation of filter, simplify operation action by avoiding a backwash water transport pipe and reduce the equipment size reducing the capacity of sludge storage. SOLUTION: Downstream of an LCW collection tank 5 accepting radioactive waste liquid containing sludge 4 in a sedimentation tank 2, a rotary filter 24 is arranged instead of conventional LCW filter device assembled with hollow fiber membrane filter. With this rotary filter 24, the sludge 4 in radioactive waste liquid from the LCW collection tank 5 is filtered. By this, backwash operation conducted with hollow fiber member filter becomes unnecessary and providing a backwash water line returning the backwash water to the sedimentation tank 2 is not required. Thus, operation action for this is simplified and the equipment can be reduced in size. Besides, as the sludge filtered in the rotary filter 24 can be stored directly in a drum 25, the extraction process of sludge 4 from the sedimentation tank 2 becomes unnecessary.

5. 发明专利

JPH09133793A RADIOACTIVE WASTE LIQUID TREATMENT SYSTEM 失效
公开(公告)号：JPH09133793A
公开(公告)日：1997-05-20
申请号：JP29391695
申请日：1995-11-13
申请人： TOSHIBA CORP , TOSHIBA ENGINEERING CO
发明人： NODA TETSUYA , KURAMITSU KIMINORI , ISHII TOMOHARU
IPC分类号： G21F9/06
摘要： PROBLEM TO BE SOLVED: To make a facility compact, reduce a maintenance work for equipment, lower the extent of exposure to a radiation and reduce the generation of a waste material by improving and recovering a treatment flowrate. SOLUTION: A filter 3 is connected to a collection tank 1 via a pump 2, and a sump tank 4 is connected to the outlet of the filter 3. The outlet of the filter 3 is connected to the collection tank 1 via a return pipe 5, and the cake delivery side of the filter 3 is connected to a drum 6. Also, an activated powder carbon feeder 7 is connected to the collection tank 1, and a chemical tank 8 is connected to the collection tank 7 and the filter 3 via chemical feed lines 12 and 9. Furthermore, the filter 3 has agitation vanes (b) and agitation liquids (c) alternately arranged in a filtration chamber (a) at a small gap, and the agitation vanes (b) rotate at a constant speed on the rotation of a motor (d). Also, a filter board (c) has a filtrated liquid discharge mechanism (e) and filter cloth is attached to both side of the filter board (c). In addition, a filter vent 10 and a filter drain 11 are connected to the outlet of the filter 3.

6. 发明专利

JPH1062596A WASTE ACTIVATED CARBON PROCESSOR OF RADIOACTIVE WASTE PROCESSING SYSTEM 失效
公开(公告)号：JPH1062596A
公开(公告)日：1998-03-06
申请号：JP21819896
申请日：1996-08-20
申请人： TOSHIBA ENGINEERING CO , TOSHIBA CORP
发明人： MASUDA KAZUMICHI , NODA TETSUYA
IPC分类号： G21F9/04 , G21F9/12 , G21F9/14
摘要： PROBLEM TO BE SOLVED: To improve the efficiency of work and reduce radiation dose of workers. SOLUTION: A sludge dryer 13 is connected to a filtering device 1 by way of a sludge exhaust valve 3 and a drum 5 is connected to the outlet side of the sludge dryer 13 by way of a sludge dryer outlet valve 15. The bottom of the drum 5 is put on a weight meter 6. Waste activated carbon sludge separated between solid and liquid with the filtering device 1 is dried with the sludge dryer 13 and this dried waste carbon sludge is charged in the drum 5. As work of carrying waste carbon sludge to an incineration furnace and work of stirring and extracting sludge from the drum 5 can be avoided by this, work efficiency improves, and owing to the simplification of the works, radiation dose to the workers can be reduced.

7. 发明专利

JPH04204296A DESALTING DEVICE FOR NUCLEAR POWER PLANT 失效
公开(公告)号：JPH04204296A
公开(公告)日：1992-07-24
申请号：JP33673990
申请日：1990-11-30
申请人： TOSHIBA CORP , TOSHIBA ENGINEERING CO
发明人： NODA TETSUYA , SEGAWA YOSHIHIRO , KAWANO TAKAO
IPC分类号： G21F9/12 , B01J49/00 , G21C19/307
摘要： PURPOSE:To enable processing also week ion components efficiently by providing an ion exchange resin recovery means to guide hot water during the recovery of ion exchange resin in a desalting device provided inside with ion exchange resin. CONSTITUTION:At the inlet pipe 13 of a desalting tower 11, an inlet valve 14 is provided and at the outlet pipe 15, an outlet valve 16 is provided. Downstream of the inlet valve 14 of the inlet pipe 13, a hot water supply pipe 17 is connected. The hot water supply pipe 17 has a supply valve 18 and supplies hot water such as reactor water and heater drain water for turbine system, etc., to the desalting tower 11 during ion exchanger resin recycle. The hot waste liquid passed through the desalting tower 11 includes ion impurity so that it is drained to radioactive liquid waste processing system by way of drain pipe 19. The drain pipe 19 is branched on the way of outlet pipe 15 and is provided with a drain valve 20 in the line. Thus, by passing hot water through the ion exchange resin having approached a break paint, a part of caught ion components are discharged.

8. 发明专利

JPH0780476A NEUTRALIZATION CONTROL OF SOLUTION 失效
公开(公告)号：JPH0780476A
公开(公告)日：1995-03-28
申请号：JP22887193
申请日：1993-09-14
申请人： TOSHIBA CORP
发明人： ARAKAWA AKIO , SEKIMIZU KOICHI , NODA TETSUYA , SEKI HIDEJI , MANO KIYOSHI
IPC分类号： C02F1/66 , G05D21/00 , G05D21/02
摘要： PURPOSE:To shorten a neutralization time while reducing the overshoot at a pH value regardless of the kind of a soln. CONSTITUTION:The concn. of a neutralizing agent contributing to neutralization is estimated and the absorption ration of the neutralizing agent, that is, the degree of electrolytic dissociation of a weak acid is calculated from the relation between the concn. of the neutralizing agent and the concn. of a hydrogen ion and, on the basis of the calculated value, the necessary feed amt. of the neutralizing agent is estimated to operate a neutralizing agent feed pump. Since the absorptivity of the neutralizing agent is renewed at every time, a neutralizing time becomes short. Since the time constant of stirring is considered, the overshoot of a pH value caused by the charging delay of the neutralizing agent is reduced.

9. 发明专利

JPH06347597A SOLIDIFICATION MATERIAL OF RADIOACTIVE WASTE 失效
公开(公告)号：JPH06347597A
公开(公告)日：1994-12-22
申请号：JP13746993
申请日：1993-06-08
申请人： TOSHIBA CERAMICS CO , TOSHIBA CORP
发明人： MATSUO KAZUAKI , TOYOHARA NAOMI , SATO TATSUAKI , NODA TETSUYA , WADA MIKIO
IPC分类号： G21F9/16 , G21F9/30
摘要： PURPOSE:To improve the fluidity of cement paste by adding a specific amount of inorganic builder consisting of special material to cement. CONSTITUTION:If a phosphate glass is added to the cement powder or water for mixing in cement, it works on the surface of cement particles and acts as surfactant. The phosphate glass is expressed as M3-n.Hn.PO4 (0

10. 发明专利

JPH0387700A TREATING METHOD FOR RADIOACTIVE WASTE LIQUID 失效
公开(公告)号：JPH0387700A
公开(公告)日：1991-04-12
申请号：JP22328689
申请日：1989-08-31
申请人： TOSHIBA CORP
发明人： YASUMURA KEIJIRO , NISHIKI YOSHIE , NODA TETSUYA
IPC分类号： G21F9/12 , B01J20/34 , C01B31/08
摘要： PURPOSE:To efficiently eliminate a soluble substance and an insoluble substance from a radioactive waste liquid of low radioactive concentration by treating the radioactive waste liquid by activated carbon, and reproducing the activated carbon by hydrogen peroxide and reusing it, when the suction capacity of the activated carbon is deteriorated. CONSTITUTION:First of all, a dummy waste liquid is supplied to a feed liquid tank 1, and by operating a pump 2, a valve V1 is opened, and the dummy waste liquid is supplied to an activated carbon filling vessel 3. Subsequently, COD of treating water is measured by a chemical oxygen demand meter (COD meter) installed in an outlet of the vessel 3, and at the time point when the COD reaches a prescribed value or above, the pump 2 is stopped. Next, the valve V1 is closed, a pump 7 is driven, a valve V3 is opened, and hydrogen peroxide is supplied by a prescribed quantity to the vessel 3. After this state is left as it is about 10 - 30 hours, the valve V3 is closed, a valve V2 is opened and hydrogen peroxide is exhausted to a used hydrogen peroxide receiving tank 8. After closing the valve V2 and V3, the valve V1 is opened, and by operating the pump 2, a waste liquid is supplied to the vessel 3 again, and the same operation is repeated.

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