The automatic production line rod fuel element and fuel element of a nuclear power reactor

 

The invention relates to nuclear energy and may find application in the manufacturing of fuel elements for fuel assemblies of nuclear power reactors VVER-1000. The technical result of the invention is the reduction of the variation of energy release at the height of the fuel elements, fuel assemblies and reactor as a whole. On one side of the table-top-box device gear mechanism installed equipment partial column of fuel pellets of the same degree of enrichment of uranium-235 in the lower part of the open end of the shell. In the top box device equipment offset of the cutter-clamp on the horizontal cradle of forming a column of fuel pellets different degrees of enrichment of uranium-235 in the direction of the cutter-emphasis performed by the value, the smaller the difference between the total length of the column of fuel pellets and a length of two partial columns tablets on the magnitude of the post from a few tablets. After the mechanism donnaregina the middle part of the shell fuel pellets enriched to a similar degree of enrichment tablets, snaryazhenya in the middle part of the shell, the mechanism of the final gear of the upper part of the casing toasty shell. Mechanisms of equipment partial column of fuel pellets in the top and bottom of the shell is made in the form of transport removable cassettes channels with fuel tablets inside each channel equal to the length of the partial column of fuel pellets, sarajievo in the upper or lower part of the casing having a valve with the holes without closing the channels and shared when loading, unloading channel partial pillars of fuel pellets in the open part of the shell and provided with stepper drives them move with the conclusion on the unloading of the next channel with partial column of fuel pellets, the power cylinder with the rod, a helical channel and the open end snaryazhenii shell. The column of fuel pellets fuel element shaped in the axial direction of enrichment of uranium-235, its middle part is filled with fuel pellets of uranium dioxide with one degree of enrichment, and the lower and upper part - tablets with a different degree of enrichment of uranium-235 at length, in order to curb the spread of the energy deposition along the length of the fuel element. 2 S. and 3 C.p. f-crystals, 8 ill.

The invention relates to nuclear energy production and may be primeneniye various enrichment of uranium 235, Assembly fuel rod in the fuel Assembly (FA), profiled on the height of the various enrichment uranium 235, mainly for water-cooled power reactor VVER-1000. The Fuel collected in the fuel assemblies located in the core of a nuclear reactor, the inevitable (radial and axial) uneven energy, determined by the leakage of neutrons outside the active zone. Reducing the non-uniformity of energy deposition in the active zone allows not only to increase the efficiency of a nuclear reactor, but also significantly improve the operating conditions of the fuel Rods and nuclear reactor as a whole.

The reduction of the variation of energy release along the length of a fuel rod allows, without changing the design of fuel elements and the size of a nuclear reactor, to increase the overall capacity of the active zone, more uniform and deeper "burn" nuclear fuel (uranium 235 in the fuel pellets of uranium dioxide), to increase the run time on a single load, while maintaining the capacity to increase thermal and strength reserves the reliability of the Fuel and core design in General.

Good effect could provide axial profiling enrichment height of a fuel rod, but this is not yet done in connection with a major complication production Telationship reactors. Book 1. Edited by F. G. Reshetnikov. -M.: Energoatomizdat, 1995, S. 16-17).

Known for the automatic production line of the fuel rod containing preparation device of the membranes to the equipment with welding stub to one end of the shell with the Stripping mechanism of the weld shell cover equipment, including kitchen vibrator with a horizontal cradle in the form of a guide slot holes remove crumbs and dust, vibratory feeder single-piece feed of fuel pellets on these lodgments for the formation of a column of fuel pellets, cutter-emphasis of the beginning of the column of fuel pellets and the cutter-clamp the end of the column of fuel pellets, cleaning of the open end of the filled shell in the form of rolling in the axial direction of the hollow stem provided with a vacuum system, mounting clamps into the open end of the filled shell, sealing the filled shell welding stub under the pressure of the inert gas under cover, surface chemical treatment posted in one thread and having the vehicle wiring device-to-device (see patent of the Russian Federation 2070740 on the application 94018136/25 from 17.05.94, Automatic production line TVEL, publ. 20.12.96 year, the IPC is to a lump sum and is not intended for equipment profiled various enrichment of the fuel element.

In the process of forming the column of fuel pellets on the cradle when pressure is applied by the cutter-clamp to form a post exactly the specified length was not possible because of the variation in length of fuel pellets, so the Rods were equipped with a column of fuel pellets with some exceeding a given length of column and one was a FA with an obviously large amount of the fuel material is uranium 235, which led to the change "To" engineering, causing uncertainty in the calculations of nuclear reactor.

The closest to the technical conditions and the achieved effect is device equipment fuel tablets shells rod fuel elements, included in the automatic line containing the-top-box with a vibrator, with a horizontal cradle in the form of guides, provided with slotted holes to remove dust and communicated with a vacuum system, the vibratory feeder single-piece feed of fuel pellets in each lodgement, the monitoring unit length of a column of fuel pellets with clipper-emphasis of the beginning of the column of fuel pellets and the cutter-clamp the end of the column of fuel pellets, the joints of the shells are welded to one end plugs, with the open ends of the coaxial Logement, communicated with a vacuum system, a rotary drum for tablets, of which in the lower position of one cell of the axial open end of the filled shell and the mechanism for measuring the length of a column of fuel pellets in the shell, where the cutter-clamp on the top-box is shifted in the direction of the cutter-focus on the length of a few tablets, mechanism of measurement, the length of a column of fuel pellets loaded shell is placed on a movable hollow stem and is combined with a mechanism for measuring the length of the tablet in the cell rotary drum, rotary dryer is equipped with a stepper motor turning a spring-loaded stop by snaryazhenii shell between its open end and a drum with a beveled face with a bias towards the shell, pipe, coaxially top cell rotary drum provided with a vacuum system on the one hand rotary drum and coaxially this same cell pipe J-shaped on the other hand rotary drum provided through the web clipper single-piece feed of the tablet feeder tablets with their Ripper, and the device is equipped with electronic computing machine, sensors, stepper motor size measurement compensation volume, respectively the lengths of one hundred and the rotation of the rotary drum, the cutter and Ripper tablets (see. patent RU 2156508 on the application 98122088 from 08.12.98,, MKI 7 G 21 C 21/02, "Method and apparatus equipment tablets shells rod TVEL").

The device can be easily integrated into an automatic production line TVEL, ensures the accuracy of the formation length of the fuel column of fuel pellets having a variation in length, but is intended for equipment TVEL one degree of enrichment of uranium 235.

Known rod fuel element for a pressurized water nuclear power reactor containing envelope filled with gas of specific composition and pressure of the fuel column in contact with one side blank and the other held in a predetermined position by the latch stub connected to the shell welds (see Development, production and operation of fuel cell power reactors. Book 1. Edited by F. G. Reshetnikov. -M. : Energoatomizdat, 1995, S. 45, Fig. 2.1 TVEL VVER-1000).

According to the requirements Talam, design and manufacturing technology of Fuel elements should be simple and inexpensive, which allows to apply high-performance automated processes. The volume fraction of structural materials is their elements of power reactors. Book 1. Edited by F. G. Reshetnikov. -M.: Energoatomizdat, 1995, S. 44).

These requirements are known, the design of the fuel element does not match, because when sealing is required to complete four of the weld (the lower plug to the shell, the welding tip technology to the shell, the welding tip process after filling with an inert gas shell and the top of the stopper to the tip process). The volume fraction of structural materials due process tip is not minimal.

The closest to the technical conditions and the achieved effect is fuel element of water-cooled nuclear power reactor containing envelope filled with gas of specific composition and pressure of the fuel column in contact with one side blank and the other held in a predetermined position by the latch stub connected to the shell welds made of electron-beam welding, and the opposite end of the shell remote from the fuel column, connected flash butt welding with a stub (see Russian Federation patent 2127457 on the application 97109458/25 from 04.06.97,, IPC 6 G 21 3/10, 21/00, 21/02, 23 TO 11/02, 15/00).

TVEL - prototype eliminates the disadvantages of ismaterial reduced - there is no technological tip. However, as is known, the fuel rod and the fuel rod prototype curb column of fuel pellets of the same degree of enrichment of uranium 235 and the manufacture of such fuel Rods with profiling enrichment of uranium 235 along the length of a fuel rod was not envisaged at the enterprises of manufacture of fuel elements for light water nuclear power reactors (see Development, production and operation of fuel cell power reactors. Book 1, edited by F. G. Reshetnikov. -M.: Energoatomizdat 1995, S. 17).

An object of the invention is to develop on the basis of the existing automatic lines for manufacturing rod TVEL new automatic lines for manufacturing a rod fuel rod, shaped by the height of the fuel elements of different enrichment uranium 235, which allows for operation in a nuclear reactor to reduce the spread of energovydeleniya height of the fuel elements, fuel assemblies and in General the active zone, to increase the overall capacity of the active zone, more uniform and deeper "burn" nuclear fuel, to increase thermal and strength reserves the reliability of the Fuel and core design in General.

This technical problem is solved in that in the automatic lines for manufacturing rod TVEL, priority is tion with welding stub to one end of the shell with the Stripping mechanism of the weld shell cover equipment, including top-box with a vibrator, with a horizontal cradle in the form of guides with slotted holes to remove dust and communicated with a vacuum system, the vibratory feeder single-piece feed of fuel pellets in each lodgement, cutter-emphasis of the beginning of the column of fuel pellets and the cutter-clamp the end of the column of fuel pellets in a horizontal cradle shifted in the direction of the cutter-focus, the joints of the shells open-ended coaxial horizontal cradle mechanism donnaregina of the fuel column in the open end snaryazhenii membrane in the form of Sagawa rotary drum and the fuel pellets inside of which one cell of the coaxial open end snaryazhenii shell with one hand and rolling a hollow rod of the power cylinder with the other hand, is in communication with the vacuum cleaning system end snaryazhenii shell fuel from dust, equipped with a mechanism for measuring the length of a column of fuel pellets in snaryazhenii membrane and measuring the length of the fuel pellets in the cell of the rotary drum, the electronic computer with sensors, stepper motor measuring compensation volume, the length of a column of fuel pellets in the shell, d is Cetelem and Ripper tablets pressing the latches in the open end snaryazhenii shell, sealing snaryazhenii shell welding stub under the pressure of the inert gas under cover, surface chemical treatment posted in one thread and having the vehicle wiring device-to-device and means of control and inspection.

According to the invention with one side of the table-top-box device gear mechanism installed equipment partial column of fuel pellets of the same degree of enrichment of uranium 235 in the lower part of the open end of the shell, in the top box device equipment offset of the cutter-clamp on the horizontal cradle of forming a column of fuel pellets different degrees of enrichment of uranium 235 in the direction of the cutter-emphasis is made equal to several fuel pellets is less than the difference between the total length of the column of fuel pellets and the total length of the two partial columns of fuel pellets, after mechanism donnaregina the middle part of the shell fuel tablets of the same degree of enrichment of uranium 235, as snaryazhenya in the middle part of the shell, the mechanism of the final gear of the upper part of the casing of the fuel tablets analogues of Tolba fuel pellets in the lower part of the shell and the mechanism end equipment partial column of fuel pellets in the upper part of the casing is made in the form of transport removable cassettes with channels, with the fuel pellets within each channel equal to the length of the partial column of fuel pellets, sarajievo in the lower part of the shell or in the upper part of the shell having a valve with the holes without closing the channels and shared when loading, unloading channel partial pillars of fuel pellets in the open part of the shell, equipped with stepper drives them move with the conclusion on the unloading of the next channel with partial column of fuel pellets and a power cylinder, a piston rod which is coaxial with the channel and the open end snaryazhenii shell.

The other difference is the implementation of transport removable cassette in the form of a drum generatrix of which is placed the channels and valves to him in the form of rotating rings on the ends of the drum, the drive of the stepping movement in the form of a spring-loaded center of the shutter, interacting with the drum and provided with a ratchet and cocking.

As a second variant implementation of the transport removable cassette in the form of a rectangular box, the height of which is placed a horizontal channels, valves on their backs is made in the form of a vertically moveable plates step motion in the form of a stepper mechanism vertical is emitting element of water-cooled power reactor, containing envelope filled with gas of specific composition and pressure, the column of fuel pellets in contact with one side blank and the other held in a predetermined position by the latch stub connected to the shell welds, plug in direct contact with the column of fuel pellets, is connected with the shell welds made of electron-beam welding, and the opposite end of the shell remote from the column of fuel pellets, connected flash butt welding with cover.

According to the invention, the column of fuel pellets profiled in the axial direction of the enrichment of uranium 235, its middle part is filled with fuel pellets of uranium dioxide with one degree of enrichment of uranium 235, and its lower and upper curb fuel pellets of uranium dioxide with a different degree of enrichment of uranium 235 at length, in order to curb the spread of the energy deposition along the length of the fuel elements, fuel assemblies and the active zone of the nuclear reactor as a whole.

Another difference is that the bottom part of the L1upper and L3a part of the column of fuel pellets made according to the profile on the length of L3=L2the total of column L of fuel pellets enriched uranium 235 is higher than the degree of enrichment of uranium 235 in the upper or lower part of the column L of fuel pellets and made equal to L2=L-(L1+L3).

The proposed automatic production line profiled TVEL allows with minimal cost to upgrade existing automatic line to produce fuel Rods filled with pelletized fuel with different enrichment of uranium 235, which allows for operation in a nuclear reactor to reduce the variation of the energy release at the height of the fuel elements, fuel assemblies and in General the active zone, more uniform and deeper "burn" nuclear fuel, to increase thermal and strength reserves the reliability of the Fuel and core design in General.

The drawings show the automatic production line rod fuel element and fuel element of a pressurized water reactor, in which Fig.1 shows the automatic production line rod fuel element of Fig.2 - the fuel rod shaped; Fig.3 - top-box; and Fig.4 - mechanism donnaregina; Fig. 5 - the gear mechanism part is yemei transport tape-pencil-case; in Fig.7 is a end view of the mechanism of the equipment;
in Fig.8 is a ratchet mechanism.

The automatic production line rod fuel rod contains preparation device shell 1 to the equipment with welding 2 stub 3 to one end of the shell 1 with the mechanism 4 Stripping weld the shell 1 with the cover 3 equipment, including top-box 5 with a vibrator 6, with a horizontal cradle 7 in the form of a guide slot holes remove crumbs and dust (not shown) communicated with the vacuum system, the vibratory feeder 8 single-piece feed of fuel pellets 9 in each of the six horizontal cradle 7, the cutter-focus 10 the beginning of the column of fuel pellets 9 and the cutter-clamp 11 end of the column of fuel pellets 9 in a horizontal cradle shifted slam-lock 10, nodes 12 junction shells 1 open-ended coaxial horizontal cradle 7, the mechanism donnaregina of the fuel column in the open end snaryazhenii shell 1 in the form of Sagawa rotary drum 13 with the cells 14 and the fuel pellets 9 inside, of which one cell 14 coaxial open end snaryazhenii shell 1 with one hand and rolling a hollow stem 15 of the power cylinder 16 on the other hand, communicated with the vacuum - length of a column of fuel pellets 9 in snaryazhenii shell 1 and measuring the length of fuel pellets 9 in cell 14 of the rotary drum 13, the electronic computer 18 with sensors electrically associated with the devices mechanism donnaregina, pressing the tabs 19 in the open end snaryazhenii shell 1, the seal 20 snaryazhenii shell 1 by welding stub 21 under the pressure of the inert gas under the shell 1, surface chemical treatment 22 posted in one thread and having the vehicle wiring device-to-device and means of control and inspection.

On the one hand countertops-box 5 device equipment installed mechanism 23 equipment partial column L1fuel pellets of the same degree of enrichment of uranium 235 in the lower part of the open end of the shell 1.

In the top box 5 device equipment offset of the cutter-clamp 11 on the horizontal cradle 7 formation of a column of L2fuel pellets different degrees of enrichment of uranium 235 in the direction of the cutter-stop 10 is made equal to several fuel pellets is less than the difference between the total length of the column L of fuel pellets and the total length of the two partial columns L1+L1or L1+L3fuel pellets L2=L-(L1+L3or L2=L-(L1+L1), L1=L3,
where L is the th column of fuel pellets in the middle part of the shell of another enrichment;
L3- partial column of fuel pellets in the upper part of the shell enrichment, similar enrichment, partial column of fuel pellets at the bottom of the shell.

After the mechanism donnaregina 13 middle part of the shell fuel tablets of the same degree of enrichment of uranium 235, which are loaded in the middle part of the shell, the mechanism 24 end equipment upper part of the casing 1 fuel tablets of the same degree of enrichment that snaryazhenya in the lower part of the shell 1, this mechanism 23 equipment partial column L1fuel pellets in the lower part of the shell 1 and the mechanism 24 end equipment partial column L3fuel pellets in the upper part of the shell 1 is made in the form of transport removable cassettes 25 channel 26 with fuel tablets 9 within each channel 26, which is equal to the length of the partial column of L1fuel pellets, sarajievo at the bottom, or L3in the upper part of the casing having a valve 27 with holes 28, shift closing channels and shared when loading, unloading channel partial columns L1, L3fuel pellets in the open part of the shell 1.

Transport removable cassette 25 snabba fuel pellets and the power cylinder 31, the rod 32 which is coaxially one channel 26 and the open end snaryazhenii shell 1. Transport removable cassette 25 is made in two versions.

The first version of the cassette is made in the form of a drum generatrix of which is placed the channels 26, valve 27 to them made in the form of rotating rings on the end face of the drum, and an actuator 29 step motion in the form of a spring-loaded center of the shutter 33, cooperating with the drum and provided with a ratchet 34 and the arm 35 of the platoon.

The second embodiment of the transport removable cassette 25 in the form of a rectangular box, the height of which is placed a horizontal channels 26, valve 27 on their backs is made in the form of a vertically moveable plate, and the actuator 30 step motion in the form of mechanism 36 stepper vertical lifting and lowering transport removable cassette 25.

The fuel element of water-cooled nuclear power reactor comprises a shell 1 is filled with the gas of specific composition and pressure. To fill the shell 1 is applied helium under a pressure of 20...25 atmospheres under the shell. In the shell 1, the column of fuel pellets 9 is in contact at one end with a plug 3, and the other is held in its fixed position by a clamp 19. Stub 3, 21 obolochkoi 1 welded seam, made of electron-beam welding, and the opposite end of the shell 1, remote from the column of fuel pellets 9, connected flash butt welding with a plug 21.

The column of fuel pellets 9 profiled in the axial direction of the enrichment of uranium 235. Its middle part is filled with fuel pellets 9 of uranium dioxide with one degree of enrichment of uranium 235, and its lower and upper curb fuel tablets 9 of uranium dioxide with a different degree of enrichment of uranium 235 at length, in order to curb the spread of the energy deposition along the length of a fuel rod, fuel Assembly and the active zone of the nuclear reactor as a whole.

Bottom L1upper and L3part of the column of fuel pellets made according to the profile on the length of L1=L3=13D39D, where L1=L3- the length of the profiled upper or lower part of the column of fuel pellets;
D - diameter of the fuel pellet and the middle part of the L2the total of column L of fuel pellets enriched uranium 235 is higher than the degree of enrichment of uranium 235 in the upper or lower part of the column L of fuel pellets and made equal to L2=L-(L1+L3).

Automatic line izgotovlenie 1 with the electron-beam welding 2 stub 3 by the end of the shell 1 and the Stripping of the weld on the Stripping mechanism 4 of the shell 1 is coming to the gear mechanism 23 equipment partial column L1fuel pellets 9 in the lower part of the shell 1. Delivery of partial columns of fuel pellets 9 is carried out in transport a removable cartridge with 25 channels 26 with fuel tablets 9 inside, with the length of the channels 26, is equal to the length L1partial column of fuel pellets 9. Transport a removable cartridge 25 may be made in the form of a drum with the placement of the channels 26 by forming drum with rotary valves 27 to them on the ends of the holes 28 in the valve and in the form of a rectangular box, the channels 26 which are disposed horizontally at the height of the canister, and a valve in the form of a vertically moveable plates.

Upon delivery to the transport equipment removable cassette 25 in the form of a drum installed in the actuator 29 step motion in the form of a spring in the center of the shutter 33, the handle 35 is turned several times - vzvoda, combine the holes 28 in the valve 27 with the openings of the channels 26 is rotatable around the axis of the valve 27 and the rod 32 of the power cylinder 31 is a partial column of L1fuel pellets 9 one degree of enrichment of uranium 235 equip in the open end in the lower part of the shell 1.

When reverse motion of the rod 32 of the power cylinder 31 actuates the ratchet 34, the drum turns on I repeated.

Upon delivery to the transport equipment removable cassette 25 in the form of a rectangular box, the latter is installed in the actuator 30 step motion in the form of mechanism 36 stepper vertical lifting and lowering transport removable cassette.

Equipment partial post is a rod 32 of the power cylinder 31 at the open end of the shell 1 is similar to the gear channel of the drum.

Shell 1, curb partial columns L1their open ends are automatically installed in the nodes 12 of the junction of the coaxial horizontal cradle 7 tops-box 5 with the vibrator 6. The cutter-clamp 11 is shifted to the side of the cutter-stop 10 on the value of L2equal to several fuel pellets 9 is less than the difference of the total length of the column L of fuel pellets 9 and the combined length of two partial columns L1+L1or L1+L3fuel pellets L2=L-(L1+L3or L2=L-(L1+L1), L1=L3,
where L is the total length of the column of fuel pellets;
L1- partial column of fuel pellets in the lower part of the casing 1 enrichment;
L2- partial column of fuel pellets in the middle part of the shell of another enrichment;
Lth column of fuel pellets at the bottom of the shell.

Include a vibratory feeder 8 and the fuel pellets 9 from the vibratory feeder 8 vibration horizontally cradles 7 and navigate to the web clipper-stop 10.

When moving fuel pellets 9 horizontal cradle 7 is removed fuel dust, crumbs, chips through the slotted holes in the horizontal cradle 7 and the formation of a partial column of L2that the cutter-clamp 11 is cut off and after the opening of the cutter-stop 10 under the action of vibration is introduced into the open end of the shell 1.

The shell 1 is filled with a partial column of L1one of enrichment and partial column L2another enrichment of uranium 235, is supplied to donnaregina, where with the help of the mechanism 17 measuring the length of a column of tablets (L1+L2in the shell 1 is missing to the defined length of the column length of tablets 9.

Electronic computer 18 gives a command to the rotation of the drum 13 with the output position of donnaregina the cells 14 of coaxial open end of the shell and the stem 15 of the power cylinder 16 missing tablet to the defined length of the column is introduced into the shell 1.

The shell 1 after donnaregina the middle part of the partial column of L2fuel tabla is Ogadenia uranium 235, that and L1where similar equipment partial column L1exercise equipment partial column L3.

The shell 1 is shaped different enrichment uranium 235, i.e., with reduced enrichment on the ends and high enrichment in the middle is supplied to the injection clamps 19 to the open end of the filled shell to clean the open end from dust and seal 20 flash butt welding stub 21 to the casing 1 under the pressure of helium under the shell.

After sealing the fuel Rods undergo ultrasonic testing of the weld and surface chemical treatment 22.

The fuel element of water-cooled power reactor manufactured as follows. To the shell 1 weld stub 3 electron-beam welding, to the open end in the lower part of the shell can be used to equip a partial column of L1fuel pellets 9 low enrichment uranium 235, in the middle part of the shell 1 equip incomplete partial post2fuel pellets 9 high enrichment uranium 235, conduct donnaregina to a predetermined length of the middle part and the upper part of the shell equip partial column "L3" fuel tablets low enrichment uranium 235.

The length L3- the length of the profiled upper or lower part of the column of fuel pellets;
D - diameter of the fuel pellet and the middle part of the L2the total of column L is determined by the formula: L2=L-(L1+L3).

Example: when the tablet diameter of 7.6 mm length L=3530 mm column pills L1= 13D39D;
L1=H,6=98,8 mm, L1=H,6=296 mm, L1=L3; L1=L3=98,8...296, and the length L2the middle part is equal to L2=L-(L1+L3);
L2=3530-(98,8+98,8)L2=3332 mm
L2=3530-(296+296)L2=2938 mm
From the calculation it is necessary that the length L1or L3may be within 98,8296 mm, which is the most optimal.


Claims

1. The automatic production line rod fuel element containing preparation device of the membranes to the equipment with welding stub to one end of the shell, with the Stripping mechanism of the weld shell cover equipment, including top-box with a vibrator, with a horizontal cradle in the form of guides with slotted holes to remove dust and communicated with a vacuum system, the vibratory feeder single-piece feed of toplista fuel pellets in a horizontal cradle, shifted in the direction of the cutter-focus, the joints of the shells open-ended coaxial horizontal cradle mechanism donnaregina of the fuel column in the open end snaryazhenii membrane in the form of Sagawa-rotary drum and the fuel pellets inside, of which one cell of the coaxial open end snaryazhenii shell with one hand and rolling a hollow rod of the power cylinder with the other hand, is in communication with the vacuum cleaning system end snaryazhenii shell fuel from dust, equipped with a mechanism for measuring the length of a column of fuel pellets in snaryazhenii membrane and measuring the length of the fuel pellets in the cell rotary drum, electronic computing machine with sensors stepper motor measuring compensation volume, the length of a column of fuel pellets in the shell, the length of tablets, electrically connected with the motor of the stepping rotation of the rotary drum, the cutter and Ripper tablets, mounting clamps into the open end of the filled shell, sealing the filled shell welding stub under the pressure of the inert gas under cover, surface chemical treatment posted in one thread and having transportyou side of the table-top-box device gear mechanism installed equipment partial column of fuel pellets of the same degree of enrichment of uranium-235 in the lower part of the open end of the shell, in the top box device equipment offset of the cutter-clamp on the horizontal cradle of forming a column of fuel pellets different degrees of enrichment of uranium-235 in the direction of the cutter-emphasis performed by the value, the smaller the difference between the total length of the column of fuel pellets and a length of two partial columns of fuel pellets on the magnitude of the post of several fuel pellets, after mechanism donnaregina the middle part of the shell fuel pellets enriched to a similar degree of enrichment of the fuel pellets, snaryazhenya in the middle part of the shell, the mechanism of the final gear of the upper part of the shell fuel pellets enriched to a similar degree of enrichment of the fuel pellets, snaryazhenya in the lower part of the shell, while the mechanisms of equipment partial column of fuel pellets in the top and bottom of the shell is made in the form of transport removable cassettes channels with fuel tablets inside each channel equal to the length of the partial column of fuel pellets, sarajievo in the upper or lower part of the casing having a valve with the holes without closing the channels and shared at boot time, VYGR is about moving with the conclusion on the unloading of the next channel with partial column of fuel pellets, the power cylinder with the rod, a helical channel and the open end snaryazhenii shell.

2. Automatic line under item 1, characterized in that the transport removable made in the form of drum generatrix of which is placed channels, valves made to them on the ends of the drum in the form of rotating rings, actuator stepper move made in the form of a spring-loaded center of the shutter, interacting with the drum and provided with a ratchet and cocking.

3. Automatic line under item 1, characterized in that the transport removable made in the form of a rectangular case, horizontal channels placed at its height, the valve on their backs is made in the form of a vertically moveable plates, and drive the stepping movement in the form of a stepper mechanism vertical lifting and lowering transport removable cassette.

4. Fuel element power reactor containing envelope filled with gas of specific composition and pressure, the column of fuel pellets in contact with one side blank and the other held in a predetermined position by the latch stub connected to the shell welds, plug directly contact the th, and plug the opposite end of the shell remote from the column of fuel pellets, is connected with the shell by this welding, characterized in that the column of fuel pellets fuel element shaped in the axial direction of enrichment of uranium-235 in such a way that its middle part is filled with fuel tablets with one degree of enrichment of uranium-235, and the lower and upper part of the fuel tablets with a different degree of enrichment of uranium-235 at length, in order to curb the spread of the energy deposition along the length of the fuel element.

5. Fuel element according to p. 4, characterized in that the lower and upper part of the column of fuel pellets made according to the profile on the length determined by the formula
L3= L1-(1339)D
where L3= L1- the length of the profiled upper and lower parts of the column of fuel pellets;
D is the diameter of the fuel pellets;
and the middle part of the total column of fuel pellets with a degree of enrichment of uranium-235 is higher than the degree of enrichment of the upper and lower parts of the total of the column of fuel pellets made length determined by the formula
L2= L - (L1+L3),
where L2- DL the>L3- the length of the profiled upper and lower parts of the column of fuel pellets.

 

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