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1. 发明专利

JPH04200680A SOLIDIFYING MATERIAL FOR WASTE, SOLIDIFYING TREATMENT AND PRODUCTION OF SOLIDIFIED BODY 失效
公开(公告)号：JPH04200680A
公开(公告)日：1992-07-21
申请号：JP32919090
申请日：1990-11-30
申请人： HITACHI LTD , HITACHI ENG SERVICE , HITACHI NUCLEAR ENG
发明人： TAMADA SHIN , KIUCHI YOSHIMASA , NISHI TAKASHI , HATTORI YASUO
IPC分类号： G21F9/30 , B09B3/00
摘要： PURPOSE:To solidify materials contg. Al in a sound state while suppressing the reaction to generate gases, such as hydrogen, or without inducing such reaction by regulating the pH value of supernatant water at the time of forming cement paste within the range of specific values. CONSTITUTION:The pH value of the supernatant at the time of the formation of the cement paste is regulated to >=10 and >=13.3. The materials contg. Al are solidified by the solidifying material prepd. in such a manner in the sound state while suppressing the reaction to generate the gases, such as hydrogen, or without inducing such reaction. The reutilization of the industrial waste as cement aggregate, etc., and the sound impartation of artificial barriers to the radioactive waste are possible in this way. For example, at least one kind of Ca silicate, Ca aluminate and Na aluminate are added to the cement to lower the addition ratio of K2O, Na2O, Ca(OH)2 to the cement as the above- mentioned means for regulating the pH value.

2. 发明专利

JPH0287100A SOLIDIFYING DEVICE OF INCINERATED ASH AND ITS SOLIDIFYING METHOD 失效
公开(公告)号：JPH0287100A
公开(公告)日：1990-03-27
申请号：JP23931588
申请日：1988-09-24
申请人： HITACHI LTD , HITACHI NUCLEAR ENG
发明人： SUMIYA SHINICHI , TAMADA SHIN , TSUCHIYA HIROYUKI
IPC分类号： G21F9/30 , G21F9/00 , G21F9/36
摘要： PURPOSE:To make possible the easy solidification of incineration ash by using a kneader for adding additive water to a solidifying material to knead and a solidifying device having a kneading hood detachably mounted on a filling vessel and a guide vane. CONSTITUTION:Additive water is added to a solidifying material (cement glass and the like) for injecting in a drum can 1 to provide a detachably mounting kneading hood 3 which is closed from the upper side of a kneader and the drum can 1 while a kneading vane 5 having a guide vane 4 which can freely be inserted in the drum can 1 whose edge is formed in the form of a drill. The additive water is added to the solidifying material to knead and the kneaded solidifying material is injected in the drum can 1 to knead incineration ash in the drum can 1 and the solidifying material therein so as th solidify. Thereby the incineration ash can easily be solidified without the need of complex preprocesses by solidifying the incinerated ash in the drum can.

3. 发明专利

JPH0249200A METHOD OF PELLETIZING INCINERATION ASH 失效
公开(公告)号：JPH0249200A
公开(公告)日：1990-02-19
申请号：JP20099088
申请日：1988-08-11
申请人： HITACHI LTD , HITACHI NUCLEAR ENG
发明人： TSUCHIYA HIROYUKI , TAMADA SHIN , KIKUCHI JUN , HORIUCHI SUSUMU , SUMIKAWA MASAHARU , SUMIYA SHINICHI , HATTORI YASUO
IPC分类号： G21F9/30 , G21F9/00
摘要： PURPOSE:To improve the volume reducibility of pellets without adding a binder thereto by adding a prescribed volume of water to incineration ashes and subjecting the ashes to compression molding, then curing the formed pellets hermetically for a prescribed period of time. CONSTITUTION:A constant feeding valve 4 is operated to transfer the whole amt. of the incineration ashes from a measuring device 3 to a mixer 5. While agitating vanes 7 are rotated by operating a motor 8, the prescribed volume of the waster is added to the ashes from spray nozzles 6 via a constant feeding pump 20 from a water storage tank 9. The incineration ashes absorbing the water are pelletized by using a pelletizer 11. The pellets are filled in a container 13; thereafter, the container is capped and the pellets are cured in a hermetic state.

4. 发明专利

JPH0580198A SOLIDIFYING METHOD FOR AGGREGATE OF NON-COMBUSTIBLE SOLIDS 失效
公开(公告)号：JPH0580198A
公开(公告)日：1993-04-02
申请号：JP23927691
申请日：1991-09-19
申请人： HITACHI LTD , HITACHI NUCLEAR ENG , HITACHI ENG SERVICE
发明人： TSUCHIYA HIROYUKI , KIUCHI YOSHIMASA , TAMADA SHIN , SUMIYA SHINICHI
IPC分类号： G21F9/36
摘要： PURPOSE:To grasp the radioactivity of a drum can quantitatively by solidifying a non-combustible aggregate of solids in the drum can in the condition with no voids which are detrimental, and reducing the number of generated drum cans re-filled with non-combustible aggregate from the state before processing. CONSTITUTION:A non-combustible aggregate solidifying method is composed of a cutter 6, vinyl sack gripping device 7, shape measuring device 8, radioactivity measuring device 9, and kneading trough 14. The non-combustible aggregate of solids accommodated in a vinyl sack is taken out, and a drum can is re-filled therewith, and a solidifying material is injected as a solidification process.

5. 发明专利

JPH08194096A RADIOACTIVE WASTE SOLIDIFICATION PROCESSING APPARATUS 失效
公开(公告)号：JPH08194096A
公开(公告)日：1996-07-30
申请号：JP376195
申请日：1995-01-13
申请人： HITACHI LTD , HITACHI ENG CO LTD , HITACHI NUCLEAR ENG , HITACHI ENG SERVICE
发明人： HATTORI YASUO , TAMADA SHIN , KIUCHI YOSHIMASA , KOBAYASHI TAKAO , TSUCHIYA HIROYUKI
IPC分类号： G21F9/30 , G21F9/16
摘要： PURPOSE: To improve cleaning property of a rotary axis of a stirrer with a simple structure by setting a baffle plate in a kneading tank and installing the plate in the kneading tank. CONSTITUTION: A stirrer 24 is installed in a kneading tank 2 to which a solidifying material and water; raw materials of a paste; are supplied. As for the stirrer 24, stirring blades 3 are attached to a rotary axis 4. A baffle plate 1 is positioned vertically to the side wall of the kneading tank 2 and installed at one position in the circumferential direction of the kneading tank 2. The baffle plate 1 is so positioned above the stirring blades 4 as not to collide against rotating stirring blades 4. A discharge pipe 13 to supply the paste produced in the kneading tank 2 to a solidifying container 10 is connected with the bottom part of the kneading tank 2. A cleaning water supplying pipe d21 having a pump 16 and a valve 19 is connected with a cleaning water tank 15 and the kneading tank 2.

6. 发明专利

JPH05150095A SOLIDIFYING METHOD FOR USED ION EXCHANGE RESIN 失效
公开(公告)号：JPH05150095A
公开(公告)日：1993-06-18
申请号：JP31247991
申请日：1991-11-27
申请人： HITACHI LTD , HITACHI ENG SERVICE , HITACHI NUCLEAR ENG
发明人： KIUCHI YOSHIMASA , TAMADA SHIN , HATTORI YASUO
IPC分类号： G21F9/30
摘要： PURPOSE:To provide a stable solidified body without generating a swelling phenomenon by adding an appropriate quantity of hydrophilic binder and cellulose series fibrous binder, appropriately setting water content of mixture, and then granulating it into pellet. CONSTITUTION:Used ion exchange resin 1 of granule or powder in the wetted condition by water is added with hydrophilic binder 2 having a property to increase the bind effect by contacting with water and cellulose series fibrous binder 3 to strengthen combination between granules, and mixture of appropriate water content is formed by the use of a mixing machine 4. The mixture mixed with the mixing machine 4 is press-formed into non-swelling pellet with a tabletting granulating machine 5-1. Obtained pellet is solidified by the use of inorganic or organic solidifying material. Pellet can be also granulated by the use of an extrusion type granulator, instead of the tabletting granulating machine 5-1.

7. 发明专利

JPH01162198A PELLETIZING OF RADIOACTIVE WASTE 失效
公开(公告)号：JPH01162198A
公开(公告)日：1989-06-26
申请号：JP31886087
申请日：1987-12-18
申请人： HITACHI LTD , HITACHI NUCLEAR ENG
发明人： SUMIYA SHINICHI , BUSHI KIYOTAKA , TSUCHIYA HIROYUKI , TAMADA SHIN
IPC分类号： G21F9/30 , G21F9/00
摘要： PURPOSE:To perform a stable treatment, by improving various parts of a pelletizing device. CONSTITUTION:A concentrated liquid waste stored for a certain period in a tank 1 is transferred to a tank 3 together with spent resins. A waste liquid in the tank 3 is dried up and powdered by a dryer 6, is measured with a measuring equipment 10 to be a specific amount and is thrown into a pelletizer 14. As the measuring equipment 10 is a double hopper, no plugging occurs during its discharging operation. A binder in the hopper 11 is transferred to another measuring equipment 12 by a screw feeder 23 and is fed to the pelletizer 14 after measured to be a specific amount of the binder. In the hopper 11, an agitating rod rotates to loosen the binder. Because of a reverse threading mode at a top of the screw feeder 23, there is no possibility for the residual binder to be compressed to produce clogging. The screw feeder is controlled its rotation corresponding to an output of the measuring equipment 12 to prevent transferring an excess amount. The measuring equipment 12 has a structure without any expansion joint and therewith can measure very precisely. Dies of the pelletizer 14 are made of ceramics therefore are long life ones. Pelletized pellets are filled in a solidification vessel 16.

8. 发明专利

JPH0572342A MEASURING APPARATUS FOR DENSITY OF SURFACE CONTAMINATION OF RADIOACTIVE WASTE PACKING DRUM 失效
公开(公告)号：JPH0572342A
公开(公告)日：1993-03-26
申请号：JP23177491
申请日：1991-09-11
申请人： HITACHI LTD , HITACHI NUCLEAR ENG
发明人： SUMIYA SHINICHI , TAMADA SHIN
IPC分类号： G01T1/169 , G01T7/00
摘要： PURPOSE:To obtain an apparatus which executes measurement of the density of surface contamination of a drum packed with a radioactive waste by a smear method at a high speed and automatically and which does not use any specific smear filter paper. CONSTITUTION:Arms 3a and 3b for wiping the top and bottom surfaces of a drum 1 are supported so that they can rotate horizontally and rotate a little vertically, and an arm 3c for wiping the lateral surface is supported so that it can rotate horizontally and move upward and downward. At the fore ends of these arms, heads 5a, 5b and 5c for wiping the drum which can be shaken around the longitudinal axes of the arms are provided. Drive motors for making these arms and heads move are provided. Each head for wiping is brought to a filter paper holder 4 for it by the motion of the arm thereof, picks up one top sheet of stacked filter paper in the holder, by vacuum suction, and after it is shaken in a proper direction, wipes the whole of each surface of the drum rotating on a drum support, by the filter paper, with the movement of the arm. Thereafter it is shaken upward, inserted from below into a radiation detector 6 for it with the movement of the arm and subjected to measurement of radiation of the filter paper, and then it is moved to a filter paper discharge element to release the filter paper.

9. 发明专利

JPH04286997A DEVICE AND METHOD FOR DRYING RADIOACTIVE ENRICHED WASTE LIQUID 失效
公开(公告)号：JPH04286997A
公开(公告)日：1992-10-12
申请号：JP5215291
申请日：1991-03-18
申请人： HITACHI LTD , HITACHI NUCLEAR ENG
发明人： YAMAGUCHI TETSUO , FUNABASHI KIYOMI , MIURA HIDEKAZU , SAWA TOSHIO , CHINO KOICHI , KIKUCHI JUN , TAMADA SHIN , TSUCHIYA HIROYUKI
IPC分类号： G21F9/08
摘要： PURPOSE:To prevent the drop of a steam permeation quantity due to clogging of a membrane surface, by monitoring the differential pressure of the membrane of a membrane demister provided to the passage of steam and the dosage rate of the membrane surface, and washing the surface of the membrane demister accordingly. CONSTITUTION:The steam generated within a dryer 1 is led to a mist separator 2 and brought into contact with a washing solution supplied from a membrane demister 3, and large mists are removed. The steam to rise through the separator 2 goes out from the upside and is led to the membrane 3. The steam permeates pores of the membrane 3 and on that occasion the mist is catched. By this, a decontamination factor is improved. The differential pressure between the inlet and outlet of the membrane 3 is measured by a differential manometer 7, the dosage rate of impurities adhering to the membrane 3 surface is monitored by a dose meter 8, and the surface is washed with a washing nozzle 9 provided in front of the membrane 3 surface, by supplying the condensed water from a condenser 4, when either value of those becomes a fixed value or more. By this, impurities adhering to the membrane 3 surface are removed, and the drop of a steam permeation quantity and the deterioration of the membrane 3 due to the radioactive material can be prevented.

10. 发明专利

JPH04130290A METHOD AND DEVICE FOR INSPECTION RADIOACTIVE WASTE 失效
公开(公告)号：JPH04130290A
公开(公告)日：1992-05-01
申请号：JP25143090
申请日：1990-09-20
申请人： HITACHI LTD , HITACHI NUCLEAR ENG
发明人： TAMADA SHIN , SUMIYA SHINICHI
IPC分类号： G01T1/167 , G01T1/169
摘要： PURPOSE:To enable measurement accuracy to be improved by changing rotary speed according to a value of dead time generated at a detector. CONSTITUTION:A detector 6 detects the number of gamma rays at each position along with revolution at an initial speed by a rotary drive motor 3 of a radioactive waste 1. Then, presence or absence of generation of dead time and its ratio are inputted from a wave-height analyzer (MCA) 7 to a control device 8 at each t time. Then, when the dead time is generated by alpha%, the rotary speed is modified to 1/(1-alpha/100) of the initial speed based on this information. Further, when ratio of generation of dead time becomes beta% during the next t time, rotation is made at 1/(1-beta/100) of the initial speed during the next t time. Therefore, by changing the rotary speed of the next t time according to the generation ratio of the dead time at t time immediately before, live time of the detector 6 at an entire periphery of the waste 1 can be made to be equal, thus enabling radioactivity measurement accuracy of the waste 1 where a radioactive substance is scattered to be improved.

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