The automatic production line of fuel elements

 

The invention relates to nuclear energy and may find application in the manufacturing of fuel elements for fuel assemblies of nuclear power reactors. The technical result of the invention is to improve the accuracy of the formation length of a column of fuel pellets. The device measuring the length of a column and the number in the tablets it is designed as sourcesradiation protective screens collimation channels of scanning in the transverse direction-quanta moving stream of pellets in the shell when they are horizontal vibrating equipment detection units on the other side of each snaryazhenii shell with collimation channels, coaxial channels sources-radiation. While the radiation source and detection units are placed between the horizontal cradle table styling shells on equipment open end coaxial horizontal cradle countertops offset from the border of the end of the pole tablets towards the beginning of the gas collector in each filled shell, fixed in isolation from the table styling shells on the gear and provided with a block registrazione performed, at least two collimating channel scanning. 1 C.p. f-crystals, 4 Il.

The invention relates to nuclear power and may find application in automatic production lines for the manufacturing of fuel elements (FE) for nuclear reactors.

It is known device equipment fuel tablets rod fuel rod containing the top box receiving fuel pellets, feeder fuel pellets, the control device length of a column of fuel pellets, the attachment of the open end of the casing to the top outside of the box and vacuum cleaning (see U.S. patent No. 3925965 from 16.12 1975, MKI 65 In 31/00, 65 In 21/06, 65 In 57/00). In the known device the feeder fuel pellets made in the form of a tube, open at the top, has a length equal to the length of the shell, and the control device length is made in the form of scratches on the feeder. A set of fuel pellets in the feeder is carried out manually by the operator in the size of the column of fuel pellets risk on the feeder, then the feeder after the weigh-in is installed coaxially with the shell, fixed open end in the mount out of the box, and the column of fuel pellets stalkivaetsja operator in the shell. When pushing the column of fuel is rodinnymi elements and removed using a vacuum system.

The disadvantage is to manually set the column of fuel pellets in the feeder, his hand pushing into the shell, at the time of mass production of the fuel rod reduces the performance of the fabrication of the fuel elements and is hazardous to the health of the operator. In addition, reduces the performance of the manufacturing TVEL manual selection of the fuel pellets to the defined length of the column of fuel pellets.

A device for filling pipe covers fuel tablets, with variation in altitude, vibration, and the number of tablets counted by using pulse sensors measure the completed column of fuel pellets, define and add the missing number of fuel pellets to the defined length of the column (see patent GDR (DD) No. 223283, MKI 4, G 21 21/02, publ. 05.06.85 year).

In the known device due to variation of fuel pellets along the length of the formed column of fuel pellets can be more specified and you must delete some tablets or less value, then you want to add the missing part to the desired height of the column of fuel pellets.

From practice it is known that when calculating fuel pellets using impulsive sensors in the process equipment can get distorted, nobleton, because of the dust, slippage, jamming, and so on, which reduces the performance or quality of the equipment.

Closest to the technical essence and the achieved effect is the automatic production line TVEL, including preparing membranes for equipment with welding stub to one end of the shell, the equipment of the column of fuel pellets in the open end of the shell containing the countertop and table styling shells on equipment with a vibrator, with a horizontal cradle, vibratory feeder fuel pellets, cutter-emphasis of the beginning of the post and the cutter-clamp the end of the column of fuel pellets, the device measuring the length of a column of fuel pellets, cleaning the open end of a filled shell, mounting clamps, sealing, surface chemical treatment, funds transaction control and rejection (see patent RU No. 2070740 on application No. 94018136/25, IPC G 21 C 21/02 from 17.05.94,, publ. 20.12.1996,) the Automatic production line of fuel elements - prototype - eliminates the drawbacks of equipment for U.S. patent No. 3925965 in the replacement of manual labor by automatic equipment and disadvantages of the GDR patent No. 223283 in determining the length of a column of fuel pellets Imola and cutter clamp the end of the column of fuel pellets. However, due to the fact that the fuel pellets have a large variation in length, in the process of forming the column of fuel pellets on the cradle between the cutter-focus and the cutter-clamp to form the defined length of the column of fuel pellets could not requiring additional measuring the length of a column of fuel pellets loaded shell, a movable rod of the pneumatic cylinder and a decision on the addition of fuel pellets loaded shell or exceptions to the defined length of the column. Measuring the length of a column of fuel pellets movable rod of the pneumatic cylinder did not exclude the inertia that could lead to the destruction of the fuel pellets rod and chips, crumbs in running the shell on the technical conditions is not valid.

An object of the invention is to improve the accuracy of the formation length of a column of fuel pellets having a variation in length, without damage when measuring and determining the number of fuel pellets.

This technical problem is solved in that in the automatic lines for manufacturing a fuel rod, comprising preparing membranes for equipment with welding stub to one end of the shell, outfit post of the fuel table is horizontal cradle, the feeder supply of fuel pellets, on a horizontal cradle countertops, cutter-emphasis of the beginning of the post and the cutter-clamp the end of the column of fuel pellets, the device measuring the length of a column of fuel pellets, cleaning the open end of a filled shell, mounting clamps, sealing, surface chemical treatment, tools, wiring, control and rejection.

According to the invention, the device measuring the length of a column and the number in it fuel pellets in each snaryazhenii shell made in the form of gamma radiation sources in a protective screens collimation channels of scanning in the transverse direction-quanta moving stream of fuel pellets in the shell when they are horizontal vibrating equipment detection units installed on the other side of each snaryazhenii shell with collimation channels, coaxial collimation channels sources of gamma radiation, the gamma radiation source and detection units of the device measuring the length of a column and the number in it fuel pellets are placed between the horizontal cradle table styling shells on equipment open end coaxial horizontal LV each filled shell, fixed in isolation from the table styling shells on the equipment and is equipped with a recording unit with the issuance of the data for each filled shell length in her column of fuel pellets, their number and the missing quantity or excess of fuel pellets in accordance with the defined length of the column of fuel pellets.

Another difference is that in the protective screens each source of gamma radiation is made at least two collimating channel scanning in the transverse direction-quanta moving in two shell pillars of fuel pellets with the corresponding coaxial to each collimation channel located collimation channels of detection units.

This embodiment of the measuring length of a column of fuel pellets in each filled shell and the number of fuel pellets in each column of fuel pellets automatic lines for manufacturing fuel elements will be non-contact method of measuring the length of the pillars of fuel pellets and the amount of fuel pellets in them during their movement in the shell during horizontal wyposarzenia, exclude measuring rod, which could be damaged fuel pellets from the common elements, where

in Fig.1 - General view;

in Fig.2 - installation of equipment;

in Fig.3 - the unit of measurement of length, 1st version;

in Fig.4 - the unit of measurement of length, the 2nd option.

The automatic production line TVEL includes:

device 1 preparation of membranes to the equipment containing the tilt table 2, along which technological sequence posted by mechanisms 3 pieces of tubing in the size of the shell 4, measuring length 5, 6 calibration one end of the shell 4 adjacent to the inclined table 2 baths 7 degreasing, rinsing, and drying, adjacent to the baths 7 tilt table 8, along which technological sequence posted by mechanisms pressing 9 stub 10 in the calibrated end of the shell 4, weighing 11 shell 4, an electron-beam installation 12 welding stub 10 to the shell 4, the stripper 13 weld ultrasonic inspection 14 weld and means 15 wiring for the equipment;

- installation of 16 wyposarzenia column of fuel pellets in the open end of the shell 4 with the top 17 and table 18 with the vibrator 19 stacking shells 4 on the gear on the horizontal cradle 20, the feeder 21 supply of fuel pellets 22 on a horizontal cradle 23 with slotted holes in the bottom of measuring the length 26 of the column of fuel pellets 22, purification of 27 the open end of a filled shell 4, the fitting 28 of the tabs 29, the means 30 Postings on the seal 31, controls, and rejection (not shown);

device 31 of the sealing;

device 32 surface treatment of a fuel rod 4.

The device 26 measuring the length of a column and the number in it fuel pellets 22 and their number in each snaryazhenii shell 4 made in the form of springs 33 gamma radiation in a protective screens 34 collimation channels 35 of scanning in the transverse direction-quanta moving stream of fuel pellets 22 in the shell 4 when the horizontal vibration equipment, the detection unit 36 installed on the other side of each snaryazhenii shell 4 with collimation channels 37, coaxial collimation channels 33 35 sources of gamma radiation. Sources 33 gamma radiation and detection units 36 device 26 measuring the length of a column and the number in it fuel pellets 22 are placed between the horizontal cradle 20 of the table 18 of the stacking shells 4 on the equipment open end coaxial horizontal cradle 23 countertops 17 offset from the border 38 of the end of the column of fuel pellets 22 towards the beginning of the gas collector area is Ola 18 stacking shells 4 on the gear and provided with a block 39 registration with the issuance of the data for each filled shell 4 along the length of column and the number in the column of fuel pellets 22, for a missing number or excess fuel pellets 22 in accordance with a given length of the column of fuel pellets 22.

Another embodiment of the device 26 measuring the length of a column and the number in it fuel pellets 22 is that in the protective screens 34 each source 33 of gamma radiation made at least two collimating channel 35 of scanning in the transverse direction-two quanta moving in the shell 4 pillars of fuel pellets 22 with the corresponding coaxial to each collimation channel 35 located collimation channels 37 detection units 36.

The automatic production line TVEL works as follows.

In the device 1 of the preparation of the casing 4 to the gear mechanism 3, the tube is subjected to cutting in the size of the shell 4, which is inclined table 2 is supplied to the mechanism 5 measuring length, on the mechanism 6 calibration one end of the shell 4, 7 baths degreasing, rinsing, and drying and tilt table 8. On the inclined table 8 shell 4 is fed to the pressing mechanism 9 in the calibrated end of the shell 4 of the plugs 10, the weighing mechanism 11, the electron-beam installation 12 welding the shell 4 with the cap 10, the fur is highlighted on the equipment. The installation of 16 equipment shell 4 is placed on the table 18 of the stacking shells 4 to six pieces in a row on a horizontal cradle 20 open ends of the horizontal side of the cradle 23 countertops 17.

When closed, the cutter-stop 24 and when the feeder 21 fuel pellets 22 fill horizontal cradle 23 countertops 17, actuates the cutter-clamp 25, opens the cutter-stop 24, and the six pillars of fuel pellets 22 when the vibrator 19 is moved in the shell 4. When this dust, crumbs are removed through the slotted holes in the bottom horizontal of the cradle 23, and the flow moving fuel pellets 22, fill each shell 4, is illuminated in the transverse direction-quanta in the measuring device 26 length of a column of fuel 22 from a source 33 of gamma radiation through collimation channel 35 in the shield 34. Through collimation channel 37 of the detection unit 36 is sent to the block 39 of the Desk, where the operator is given information about the length of the column and the number in the column of fuel pellets 22 to each filled shell 4, the missing quantity or abundance, and filled in the size of the shell 4. Due to the fact that the device superpopular all shells, as Laden in the size and abundance and scarcity of fuel pellets 22.

The second option collimation holes 35 in the shield 34 sourceradiation 33 is made diametrically opposed, and one source is set accordingly two detection unit 36, which reduces the number of sources in two times without reducing the quality of the measurement.

In running the shell 4 or added fuel pellets 22, or taken to the defined length of the column of fuel pellets 22 in accordance with the data issued by the block 39 of the Desk. Curb shell 4 is supplied to the cleaning unit 27 of the open end of the fitting 28 of the tabs 29, weighing and control (not shown) and the tool 30 transaction moves to seal 31, the control and culling (not shown) and the surface 32.

Claims

1. The automatic production line of fuel elements, including preparation device shell to the equipment with welding stub to one end of the shell, the equipment of the column of fuel pellets in the open end of the shell containing the table top and a table with a vibrator laying shells on the tops, the clipper-the emphasis of the beginning of the post and the cutter-clamp the end of the column of fuel pellets, the device measuring the length of a column of fuel pellets, cleaning the open end of a filled shell, mounting clamps, sealing, surface chemical treatment, tools, wiring, control and rejection, characterized in that the device is measuring the length of a column and the number in it fuel pellets in each snaryazhenii shell made in the form of gamma radiation sources in a protective screens collimation channels of scanning in the transverse direction-quanta moving stream of fuel pellets in the shell when they are horizontal vibrating equipment detection units installed on the other side of each snaryazhenii shell with collimation channels, coaxial collimation channels of gamma radiation sources, while the sources of gamma radiation and the detection units of the device measuring the length of a column and the number in it fuel pellets are placed between the horizontal cradle table styling shells on equipment open end coaxial horizontal cradle countertops offset from the border of the end of the column of fuel pellets in the sides of aragonia and equipped with a recording unit with the issuance of the data for each filled shell length in her column of fuel pellets, their number and the missing quantity or excess of fuel pellets in accordance with the defined length of the column of fuel pellets.

2. The automatic production line of fuel elements under item 1, characterized in that the protective screens each source of gamma radiation is made at least two collimating channel scanning in the transverse direction-two quanta moving in the shell of the pillars of fuel pellets, with the corresponding coaxial to each collimation channel located collimation channels of detection units.

 

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