CN111188084B - Replaceable integral electrode suitable for hot chamber application and electrode replacing device - Google Patents

Replaceable integral electrode suitable for hot chamber application and electrode replacing device Download PDF

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CN111188084B
CN111188084B CN202010022115.6A CN202010022115A CN111188084B CN 111188084 B CN111188084 B CN 111188084B CN 202010022115 A CN202010022115 A CN 202010022115A CN 111188084 B CN111188084 B CN 111188084B
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electrode
cathode
anode
quick connector
electrochemical
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CN111188084A (en
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何辉
常尚文
朱礼洋
唐洪彬
郭建华
刘聪
叶国安
申震
刘占元
刘协春
李斌
李峰峰
蒋德祥
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China Institute of Atomic of Energy
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    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
    • C25F5/00—Electrolytic stripping of metallic layers or coatings
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B60/00—Obtaining metals of atomic number 87 or higher, i.e. radioactive metals
    • C22B60/02—Obtaining thorium, uranium, or other actinides
    • C22B60/0295—Obtaining thorium, uranium, or other actinides obtaining other actinides except plutonium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B60/00—Obtaining metals of atomic number 87 or higher, i.e. radioactive metals
    • C22B60/02—Obtaining thorium, uranium, or other actinides
    • C22B60/04—Obtaining plutonium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
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    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
    • C25F7/00—Constructional parts, or assemblies thereof, of cells for electrolytic removal of material from objects; Servicing or operating
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C19/00—Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel
    • G21C19/42—Reprocessing of irradiated fuel
    • G21C19/44—Reprocessing of irradiated fuel of irradiated solid fuel
    • G21C19/46—Aqueous processes, e.g. by using organic extraction means, including the regeneration of these means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies

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  • High Energy & Nuclear Physics (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)

Abstract

The invention belongs to the technical field of spent fuel post-treatment, and particularly relates to a replaceable integral electrode suitable for hot chamber application and an electrode replacing device. The integral electrode (22) is arranged in an electrochemical dissolver (29) used for spent fuel aftertreatment and comprises a cylindrical cathode sleeve (6) with a closed bottom end, the top end of the cathode sleeve (6) is connected with a quick connector (1) through a connecting pipe (2), a spiral cathode (5) is arranged in the bottom end of the cathode sleeve (6), a reticular anode (4) is covered on the periphery of the bottom end of the cathode sleeve (6) in a non-contact manner, and a cathode plug (9) connected with the cathode (5) and an anode plug (8) connected with the anode (4) penetrate through the quick connector (1) and extend out of the quick connector (1). The invention can be applied to a hot chamber to dissolve the neptunium target; the monolithic electrode (22) can be replaced and removed by robotic remote manipulation in a hot cell.

Description

Replaceable integral electrode suitable for hot chamber application and electrode replacing device
Technical Field
The invention belongs to the technical field of spent fuel post-treatment, and particularly relates to a replaceable integral electrode suitable for hot chamber application and an electrode replacing device.
Background
The invention belongs to the technical field of spent fuel post-treatment, and relates to electrochemical dissolution of indissolvable metal oxide in a head-end spent fuel element in a spent fuel post-treatment process. After the aluminum matrix target member is irradiated and stacked, a large amount of reusable radioactive nuclides are contained, before the elements of Np and Pu in the target member are extracted by a chemical extraction and separation method, the elements of Np and Pu dispersed in the aluminum matrix material need to be dissolved firstly, but the oxides of Np and Pu are difficult to dissolve by hot nitric acid.
By adopting the electrochemical technology of catalytic oxidation, NpO can be treated2、PuO2The dissolution is carried out, and the electrochemical oxidation technology using Ag (II) as a catalyst can realize the rapid and complete dissolution of the indissolvable actinide metal oxide.
Strongly oxidizing metal ions Ag generated by anodic oxidation2+And NpO2Reaction takes place, NpO2Is oxidized into NpO2 2+Reduction of metal ions to Ag+The process can form a closed cycle, and the metal ions as the catalyst can be reused in the system.
The electrochemical reaction is as follows:
and (3) anode reaction:
Figure BDA0002361183360000011
Figure BDA0002361183360000012
Figure BDA0002361183360000013
Figure BDA0002361183360000014
and (3) cathode reaction:
Figure BDA0002361183360000021
Figure BDA0002361183360000022
disclosure of Invention
The invention aims to provide an electrode and a replacing device which can be replaced in the radioactive environment of a hot chamber for an electrochemical dissolver applied in the hot chamber, and the electrode can be remotely replaced and removed by adopting a manipulator in the hot chamber.
In order to achieve the above purpose, the present invention adopts a technical scheme that a replaceable integral electrode suitable for hot chamber application is arranged in an electrochemical dissolver used in spent fuel aftertreatment, wherein the integral electrode comprises a cylindrical cathode sleeve with a closed bottom end, the top end of the cathode sleeve is connected with a quick connector through a connecting pipe, a spiral cathode is arranged in the bottom end of the cathode sleeve, a reticular anode non-contact cage is covered on the periphery of the bottom end of the cathode sleeve, and a cathode plug connected with the cathode and an anode plug connected with the anode are arranged on the quick connector in a penetrating way and extend out of the quick connector.
Further, the cathode is coaxial with the cathode sleeve, the cathode is made of a platinum wire, the diameter of the cathode is 10mm, the diameter of the platinum wire is 2mm, and the connecting pipe is provided with air holes.
Furthermore, the cathode sleeve is made of a D80 ceramic material, the thickness of the cathode sleeve is 10mm, and the diameter of the cathode sleeve is 80 mm.
Further, the anode is a platinized titanium mesh or a platinum mesh, 50% of the area of the anode is hollow, and the thickness of the anode is 2 mm.
Furthermore, the anode is connected with the quick connector through a plurality of connecting rods, and the connecting rods are coated by insulating ceramics.
The quick connector is characterized by further comprising a nitric acid liquid supplementing pipe penetrating through the quick connector, wherein an opening in the top end of the nitric acid liquid supplementing pipe is a nitric acid liquid supplementing port, and the nitric acid liquid supplementing port extends out of the quick connector; the bottom end opening of the nitric acid replenishing pipe extends into the bottom end of the cathode sleeve.
Further, the top end of the cathode sleeve is connected with the connecting pipe through threads or a bayonet.
Furthermore, the quick connector is used for arranging the integral electrode in the electrochemical dissolver, the electrochemical dissolver is a vertical double-ellipse end socket container, the top of the electrochemical dissolver is provided with an interface matched with the quick connector, and the quick connector is connected with the electrochemical dissolver in a sealing way through the interface.
Further, in the present invention,
the electrode replacing device consists of an electrode replacing component, a liquid path plugging component and a circuit plugging component which are suitable for a hot chamber environment, and the long-distance replacement and removal of the integral electrode can be realized by adopting a manipulator in the hot chamber;
the electrode replacing assembly comprises a first linear guide rail, a lifting limiting plate, a first driving hand wheel, a gear rack, a worm gear and a rotating driving shaft, wherein the first linear guide rail, the lifting limiting plate, the first driving hand wheel, the gear rack, the worm gear and the rotating driving shaft are arranged on a fixed rack;
the liquid path plugging and unplugging component consists of a group of fluid quick plugging and unplugging connectors, wherein one fluid quick plugging and unplugging connector is fixed on the nitric acid liquid supplementing port of the integral electrode, and the other fluid quick plugging and unplugging connector is hung on the bracket and can be clamped by the manipulator for plugging and unplugging;
the circuit plug subassembly includes electrode compact heap, circuit plug, second linear guide, trapezoidal lead screw, second drive hand wheel for through the manipulation the second drive hand wheel drives the circuit plug with the motion of electrode compact heap is realized the circuit plug is in the plug of the circuit on the whole electrode and the supplementary compress tightly of electrode compact heap whole electrode the quick-operation joint guarantees the sealed of electrochemical dissolver.
Further, the lifting limiting plate, the rotation limiting block and the electrode limiting plate in the electrode replacement assembly are used for limiting the integral electrode to lift or rotate at a specified position.
The invention has the beneficial effects that:
1. the integral electrode has the integral design of a cathode, an anode, a cathode-anode isolation sleeve, a lifting mechanism, a cathode acid supplementing pipe and the like, meets the requirement of compact structure used in a hot chamber, realizes the basic functions of electrochemical oxidation, reduction and the like, and can also realize integral replacement.
2. The whole electrode fully considers the application of a hot chamber and other extreme environments on the design concept, can realize remote operation of a mechanical arm or a special tool and the like, and can realize whole and quick replacement.
3. The whole electrode integrates the functions of a cathode, an anode, a circuit, a liquid path and the like, and the plugging and the connection of the circuit and the conduction of the liquid path can be realized at the same time of replacing the electrode.
4. The cathode and the anode are made of materials such as platinum or platinum alloy and have the performances of nitric acid corrosion resistance, high potential electrochemical corrosion resistance and strong radioactive irradiation resistance.
5. The selection of the cathode and anode isolating materials not only realizes the effective isolation of the circuits of the cathode and the anode, but also realizes the migration of metal ions in the solution, and selects silicon carbide materials or polyethylene materials with the aperture of 1-10 microns, and the like.
Drawings
FIG. 1 is a schematic illustration of a replaceable monolithic electrode suitable for hot cell applications according to embodiments of the present invention;
FIG. 2 is a schematic diagram of an apparatus for replacing a replaceable integral electrode suitable for hot cell applications, according to an embodiment of the present invention (the integral electrode is disposed in an electrochemical dissolver);
in the figure: 1-a quick connector, 2-a connecting pipe, 3-a connecting rod, 4-an anode, 5-a cathode, 6-a cathode sleeve, 7-a nitric acid liquid supplementing pipe, 8-an anode plug, 9-a cathode plug, 10-a nitric acid liquid supplementing port, 11-an electrode replacing component, 12-a fixed rack, 13-a first linear guide rail, 14-a lifting limiting plate, 15-a first driving hand wheel, 16-a gear rack, 17-a worm gear, 18-a rotating driving shaft, 19-a rotating limiting block, 20-an electrode limiting plate, 21-a liquid circuit plugging component, 22-an integral electrode, 23-an electrode pressing plate, 24-a circuit plugging head, 25-a second linear guide rail, 26-a trapezoidal lead screw, 27-a second driving hand wheel and 28-a circuit plugging component, 29-electrochemical dissolver.
Detailed Description
The invention is further described below with reference to the figures and examples.
As shown in fig. 1, the replaceable integral electrode suitable for hot chamber application provided by the invention is arranged in an electrochemical dissolver 29 used in spent fuel aftertreatment, and the integral electrode 22 comprises a quick connector 1, a connecting pipe 2, a connecting rod 3, an anode 4, a cathode 5, a cathode sleeve 6, a nitric acid replenishing pipe 7, an anode plug 8, a cathode plug 9, a nitric acid replenishing port 10 and the like.
The cathode sleeve 6 is a cylinder with a closed bottom end, the top end of the cathode sleeve 6 is connected with the quick connector 1 through the connecting pipe 2, the cathode 5 is arranged in the bottom end of the cathode sleeve 6, the netted anode 4 is not contacted with the periphery of the bottom end of the cathode sleeve 6, the cathode plug 9 of the cathode 5 and the anode plug 8 of the anode 4 are connected and arranged on the quick connector 1 in a penetrating way, and the cathode plug and the anode plug extend out of the quick connector 1.
The cathode 5 is spiral and coaxial with the cathode sleeve 6, the cathode 5 is made of a platinum wire, the diameter of the cathode 5 is 10mm, the diameter of the platinum wire is 2mm, and the connecting pipe 2 is provided with air holes.
The cathode sleeve 6 is made of D80 ceramic material, and has a thickness of 10mm, a diameter of 80mm and a length of 300-800 mm.
The anode 4 is a platinized titanium mesh or a platinum mesh, is hollowed in 50% area, has the thickness of 2mm, the diameter of 120-200 mm and the height of 300-400 mm.
The anode 4 is connected with the quick connector 1 through a plurality of connecting rods 3, and the connecting rods 3 are coated by insulating ceramics. In the design, the surface area of the anode 4 is as large as possible, and the volume of the cathode 5 is as small as possible, so that the current efficiency is improved, and the dissolution waste liquid is reduced.
The nitric acid liquid supplementing pipe 7 penetrates through the quick connector 1, the top end opening of the nitric acid liquid supplementing pipe 7 is a nitric acid liquid supplementing port 10, and the nitric acid liquid supplementing port 10 extends out of the quick connector 1; the bottom end opening of the nitric acid replenishing pipe 7 extends into the bottom end of the cathode sleeve 6.
The top end of the cathode sleeve 6 is connected with the connecting pipe 2 through threads or a bayonet.
The quick connector 1 is used for arranging the integral electrode 22 in an electrochemical dissolver 29, the electrochemical dissolver 29 is a vertical double-oval end socket container, the top of the electrochemical dissolver is provided with an interface which is matched with the quick connector 1, and the quick connector 1 can be connected with the electrochemical dissolver 29 in a sealing way through the interface.
An electrode changing apparatus for a replaceable monolithic electrode suitable for hot cell applications as described above is also disclosed, as shown in FIG. 2. The electrode replacing device consists of an electrode replacing component 11, a liquid path plugging component 21 and a circuit plugging component 28 which are suitable for a hot chamber environment, and a manipulator in the hot chamber can realize the remote replacement and removal of the integral electrode 22;
the electrode replacing component 11 comprises a first linear guide rail 13, a lifting limit plate 14, a first driving hand wheel 15, a gear rack 16, a worm gear 17 and a rotating driving shaft 18 which are arranged on a fixed rack 12, wherein the top end of the rotating driving shaft 18 is provided with a rotating limit block 19 and an electrode limit plate 20 connected with an integral electrode 22, and the electrode replacing component is used for driving the rotating driving shaft 18 to lift and rotate by operating the first driving hand wheel 15 so as to realize the lifting and the rotation of the integral electrode 22, ensure the stability of the integral electrode 22 during replacement and prevent the integral electrode 22 from being damaged;
the liquid path plugging component 21 consists of a group of fluid quick plugging joints and is arranged at a position close to the top of the electrochemical dissolver 29, wherein one fluid quick plugging joint is fixed on the nitric acid solution supplementing port 10 of the integral electrode 22, and the other fluid quick plugging joint is hung on the bracket and can be plugged by being clamped by a manipulator;
the circuit plugging component 28 comprises an electrode pressing block 23, a circuit plugging plug 24, a second linear guide rail 25, a trapezoidal screw rod 26 and a second driving hand wheel 27, and is used for driving the circuit plugging plug 24 and the electrode pressing block 23 to move by operating the second driving hand wheel 27, so that plugging of a circuit of the circuit plugging plug 24 on the integral electrode 22 and auxiliary pressing of the electrode pressing block 23 on the quick connector 1 of the integral electrode 22 are realized, and sealing of the electrochemical dissolver 29 is ensured;
the limiting mechanism in the electrode replacing assembly is used for limiting the lifting and the falling of the integral electrode 22 at a specified position or rotating the integral electrode by the lifting and the falling limiting plate 14, the rotating limiting plate 19 and the electrode limiting plate 20.
Finally, illustrating the practical application of the present invention to a replaceable monolithic electrode and electrode replacement device suitable for hot cell applications:
the feed liquid containing the radioactive elements Np and Pu is electrochemically dissolved in the selected hot cell by using an electrochemical dissolver 29 provided with a replaceable integral electrode 22 suitable for hot cell applications, and nitric acid with a certain concentration is added into the cathode sleeve 6. The electrolysis power supply of the electrochemical dissolver 29 is started, the current is regulated to be stabilized within a certain range, and the temperature of the electrolyte in the electrochemical dissolver 29 is controlled to be less than 40 ℃.
And after the electrolysis is finished, the electrolysis power supply is closed, and the concentrations of Np, Pu and nitric acid in the electrolyte are sampled and analyzed to meet the set requirements.
When the integral electrode 22 is replaced, in the first step, an interlocking switch between the integral electrode 22 and the electrochemical dissolver 29 is opened, the motor is electrically started, the integral electrode 22 is grabbed and lifted, the integral electrode 22 is removed after the integral electrode is lifted to a sufficient height, and the plug-in quick-change connector (a circuit plug and a fluid quick plug-in connector) is loosened to detach the integral electrode 22; the above process is reversed and a new integral electrode 22 can be installed. The process can meet the requirement of long-distance operation of the hot chamber, realize the function of replaceable integral electrode 22 and meet the design requirement.
The device according to the present invention is not limited to the embodiments described in the specific embodiments, and those skilled in the art can derive other embodiments according to the technical solutions of the present invention, and also belong to the technical innovation scope of the present invention.

Claims (2)

1. An electrode changing apparatus for a replaceable monolithic electrode suitable for hot cell applications, comprising:
the replaceable integral electrode suitable for hot chamber application is arranged in an electrochemical dissolver (29) used in spent fuel aftertreatment, the integral electrode (22) comprises a cylindrical cathode sleeve (6) with a closed bottom end, the top end of the cathode sleeve (6) is connected with a quick connector (1) through a connecting pipe (2), a spiral cathode (5) is arranged in the bottom end of the cathode sleeve (6), a reticular anode (4) is covered on the periphery of the bottom end of the cathode sleeve (6) in a non-contact mode, a cathode plug (9) connected with the cathode (5) and an anode plug (8) connected with the anode (4) penetrate through the quick connector (1) and extend out of the quick connector (1);
the cathode (5) is coaxial with the cathode sleeve (6), the cathode (5) is made of a platinum wire, the diameter of the cathode (5) is 10mm, the diameter of the platinum wire is 2mm, and the connecting pipe (2) is provided with air holes;
the cathode sleeve (6) is made of a D80 ceramic material, the thickness is 10mm, and the diameter is 80 mm;
the anode (4) is a platinized titanium mesh or a platinum mesh, 50% of the area of the anode is hollow, and the thickness of the anode is 2 mm;
the anode (4) is connected with the quick connector (1) through a plurality of connecting rods (3), and the connecting rods (3) are coated by insulating ceramics;
the quick connector is characterized by further comprising a nitric acid liquid supplementing pipe (7) penetrating through the quick connector (1), wherein the top end opening of the nitric acid liquid supplementing pipe (7) is a nitric acid liquid supplementing port (10), and the nitric acid liquid supplementing port (10) extends out of the quick connector (1); the bottom end opening of the nitric acid liquid supplementing pipe (7) extends into the bottom end of the cathode sleeve (6);
the top end of the cathode sleeve (6) is connected with the connecting pipe (2) through threads or bayonets;
the quick connector (1) is used for arranging the integral electrode (22) in the electrochemical dissolver (29), the electrochemical dissolver (29) is a vertical double-ellipse end socket container, the top of the electrochemical dissolver is provided with an interface matched with the quick connector (1), and the quick connector (1) can be connected with the electrochemical dissolver (29) in a sealing way through the interface;
the electrode replacing device consists of an electrode replacing assembly (11), a liquid path plugging assembly (21) and a circuit plugging assembly (28) which are suitable for a hot chamber environment, and the whole electrode (22) can be remotely replaced and detached by adopting a manipulator in the hot chamber;
the electrode replacing assembly (11) comprises a first linear guide rail (13), a lifting limiting plate (14), a first driving hand wheel (15), a gear rack (16), a worm gear (17) and a rotating driving shaft (18) which are arranged on a fixed rack (12), wherein the top end of the rotating driving shaft (18) is provided with a rotating limiting block (19) and an electrode limiting plate (20) connected with the integral electrode (22), and the electrode replacing assembly is used for driving the rotating driving shaft (18) to lift and rotate by operating the first driving hand wheel (15) so as to realize the lifting and the rotation of the integral electrode (22) and ensure the stability of the integral electrode (22) during replacement;
the liquid path plugging and unplugging component (21) consists of a group of fluid quick plugging and unplugging connectors, wherein one fluid quick plugging and unplugging connector is fixed on the nitric acid liquid supplementing port (10) of the integral electrode (22), and the other fluid quick plugging and unplugging connector is hung on a support and can be clamped by the manipulator for plugging and unplugging;
the circuit plug subassembly (28) includes electrode compact heap (23), circuit plug (24), second linear guide (25), trapezoidal lead screw (26), second drive hand wheel (27), is used for through the manipulation second drive hand wheel (27) drive circuit plug (24) with electrode compact heap (23) motion is pulled out to the circuit, realizes circuit plug (24) is in the plug of the circuit on whole electrode (22) and electrode compact heap (23) supplementary compress tightly whole electrode (22) quick-operation joint (1), the assurance electrochemical dissolver (29) is sealed.
2. The electrode changing apparatus according to claim 1, wherein: the lifting limit plate (14), the rotation limit plate (19) and the electrode limit plate (20) in the electrode replacement assembly (11) are used for limiting the integral electrode (22) to lift or rotate at a specified position.
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BE769377A (en) * 1971-07-01 1971-11-16 En Nucleaire C E N E N I Centr ELECTROCHEMICAL CUTTING PROCESS OF AN IRRADIATED NUCLEAR FUEL ASSEMBLY
US3901786A (en) * 1974-04-10 1975-08-26 Us Energy Electrolytic dissolver
FR2562314B1 (en) * 1984-03-27 1989-02-17 Commissariat Energie Atomique PROCESS FOR RECOVERING PLUTONIUM CONTAINED IN SOLID WASTE
FR2561942B1 (en) * 1984-03-27 1989-10-20 Commissariat Energie Atomique PROCESS AND DEVICE FOR THE DISSOLUTION OF PLUTONIUM AND / OR NEPTUNIUM OXIDES
GB8805752D0 (en) * 1988-03-10 1988-04-07 Atomic Energy Authority Uk Method of cutting
WO1989010981A1 (en) * 1988-05-03 1989-11-16 Battelle Memorial Institute Apparatus and method for dissolving hazardous waste materials by catalyzed electrochemical dissolution
FR2707303B1 (en) * 1993-07-08 1995-09-22 Framatome Sa Method and device for the electrochemical machining of metallic materials and in particular of the internal surface of bottom bushings of a nuclear reactor.
JP4504247B2 (en) * 2005-04-28 2010-07-14 株式会社東芝 Minor actinide recycling method
JP5193687B2 (en) * 2008-05-30 2013-05-08 株式会社東芝 Spent fuel reprocessing method

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