DE2009081A1 - Shear device for irradiated fuel elements - Google Patents

Description

Herne, 8000 Munich 23,

Freiligrathstrasse 19 '-_.._' ". Eisenacher Strasse 17

postach! « Dipl.-ing. RH Bahr _Pat .. _{App. Belz [he}

Pat. Herrmann-Trentepohl Γ> ϊηΙ Phv «I = HlIfIrrf Rotvlor Telephone: 398011 Telephone: 5 10 13 I / I P I.-rny S. CdUard ΟΘΙΖΙθΓ 39801Ζ

⁵ _h ¹⁰ , r Dipi.-Ing. W. Herrmann-Trentepohl ³⁹⁸⁰¹³

Telegram address: ro tr Telegram address:

Bahrpatente Herne PATENTANWÄLTE Babetzpat Mynchen

Telex 08 229 853 -, Telex 0524562

f ~ '~ l bank accounts:

Bayrische Vereinsbank Munich 952287 Dresdner Bank AG Herne 202435 Postal check account Dortmund 558 68

Ref .: MO 2104

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Please send a letter to:

SAINI-GOBAIH TECHIiIIQUES EOUYEILES, Oourbevoie / Seine, France

Shear device for irradiated fuel elements

In order to improve the heat transfer "in nuclear reactor plants, one is forced to manufacture fuel elements ^ the | Cartridges of small cross-section, for example, of a value on the order of a square centimeter or include consist of a cartridge or sleeve with a complicated cross-section, for example an outer jacket and a Have inner sheaths that are intended to be in contact to be set with a cooling medium. The usual way is to use sleeves with a diameter in the order of centimeters, which are based on nuclear fuel powder natural uranium or enriched uranium are filled, as well as pods with their outer and inner sheaths between them include a nuclear fuel made from a fissile Metal or a fissile alloy is formed.

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After the residence time in the nuclear reactors, the irradiated Elements are treated to give the nuclear fuel a predetermined degree of purity, and the fission products again that represent a commercial value. Since it is practically impossible to mechanically remove this fuel from the sheaths or pulling out sleeves, one usually resorts to a chemical separation process, which consists in being selective to dissolve the sleeves or cartridges or the nuclear fuel in a bath of a suitable type, which is in a dissolution vessel or a Battery of solution containers is contained »This bath is for example on the basis of saltpeter, if the stainless Steel or zirconium alloy sleeves are filled with a powder of natural or enriched uranium or is made on the basis of caustic soda if the casings made of aluminum or a magnesium alloy, press uranium or one of its alloys between them. However, it is it is essential to deliver the sleeves or cartridges in pieces so that the bath can come into contact with the fuel or also to reduce the size of the dissolving tank.

Since an element - apart from the cartridges connected to a bundle by means of lateral spacers, which thus form the body of this element - has white inert ends, which are intended for insertion in the nuclear reactors, these ends should be started at the same time or gradually on a sawing device, the cartridges forming the body of the element remaining connected in a bundle by virtue of the lateral kwisehenstiieke. This bundle is then placed in a clipper ¹ : with a body, dor in relation; A solution kettle - or a battery of such devices - is seoei. ^ t is operated with the help of connection lead lines, with a chin device and a tool advantageously operated nutels Zyitnderanordnunicen and in the body. . · of the shearing device are mounted in order corresponding to a predetermined Uloh tang to be slidable; In addition, a bracket assigned to the shearing device or a stop is provided, as well as a feed device,

BATH ORIGINAL

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which is used to move the cartridge bundle by one step with one to let the predetermined value run forward, the "for example is 20 to 30 mm. It should be noted that in the shearing devices manufactured to date, the tool has a step ramp which is inclined against said sliding direction and. is bounded by a flat surface, which is arranged opposite the clamping device.

Once there is that which forms the ESr / ser. Cartridge bundle between the clamping device / bearing is pressed, that's how it cuts due to its cylinder arrangement, the tool actuated the

Sleeves into pieces, these pieces then in the solution I

the boiler fall over the oily lines.

However, it is important to know that the tool cuts the sleeve bundle, before and after a lateral intermediate piece or at the location of this intermediate piece - this intermediate piece further connects the Hülsenabsehnitte with each other and so to Formation of a mass leads that easily clogs the dissolving tank or its Yerbindungsselilaachleitung with the S rather device. Is the solution boiler above it by a Conveyor formed, which runs in an attack liquid bath, so the said mass may protrude from the bath and thus leads to an incomplete solution of the core problem fabric or the sleeve.

These disadvantages are deepened when you consider an item wants to shred into pieces whose cartridge bundle from a Coating or a Yerfcleiöung is surrounded. The tool then each time cuts a ring in this jacket, which clamps the cartridge sections.

A common Behamilimgsanordnung the application of said chemical Trennverfafarena for this element thus comprises outside of a sawing machine and a conventional shearing means a reduction arrangement that e: on En5glieht, the cartridge bundle from the shell to remove si & Gh & em inert ends of the element

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the sawing device has been removed.

According to the invention, these disadvantages are now to be eliminated. This is achieved "in the case of a shearing device essentially in that the one provided opposite the clamping device Surface of the tool at least one protruding part and has a hollow part which are spaced apart from one another by a distance of a value greater than that of the feed, the feed device of which serves to advance the body of the element into the shear device.

The protruding part of the tool according to the invention makes it possible to provide a section of a depth in the body of a fuel element, the value of which is greater than the value of the Step of the feed device is. From this it follows that if the tool has this body of elements? before or after a lateral intermediate piece cuts - or at the location of this intermediate piece - this intermediate piece at least in two pieces is separated, just like the said mass of the sections. The shearing device makes it possible in an analogous manner according to the invention, to separate the jacket ring cut in the body of the element into at least two parts, if its cartridge bundle is surrounded by a coating or jacket.

This reduces the risk of clogging of the solution tank or whose connection hose assemblies continue with the shearing device, as well as the risk of incomplete dissolution of the Nuclear fuel or cartridges if the shearing tool according to the invention has a certain number of protruding parts having.

The invention also relates to a treatment arrangement with a sawing device, a shearing device with the features mentioned and a solution tank filled with a liquid attack bath. Such an arrangement enables it now actually, the former separation process mentioned -

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that consists in selectively dissolving the cartridges or the pulp in the attack liquid bath in the dissolving tank - 'even though they can be applied to elements with a jacket as well as to elements with a jacket surrounding the cartridge bundle, without it being necessary to dismantle the same door direction the sawing device and the sowing device according to the invention to be arranged in addition.

The invention will now be explained in more detail with reference to the accompanying drawings, with some embodiments t of the invention being contrasted with a conventional treatment arrangement with a shearing device.

In the drawings shows:

Pig. 1 is a longitudinal view of a fuel element with parts removed;

Fig. 1A shows in a larger representation that in Pig. 1 dash-dotted surrounded part A;

Pig. 2 is analogous to Pig. 1 is a longitudinal view of a jacketed fuel element, whereby parts have been omitted; "

Pig. 3 shows a conventional arrangement for handling in plan view of fuel elements;

Pig. 4 is a plan view of a conventional viewing device; with parts left out;

Pig. Figure 5 is a section through the Pig device. 4, along the line V - V in this Pigurj

Pig. 6 shows a common shear tool with two in opposite directions Towards inclined stepped rarapen;

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Pig. 7 shows analogously to Pig. 6 shows another shear tool with two interchangeable inclined shear ramps;

Pig. Fig. 8 is a top plan view, partly in section, taken along line YIII-YIII of the Pig embodiment. 9;

Pig. Figure 9 is a sectional view taken along line IX-IX of Pig. 8, where T _e ile have been omitted;

Pig. Fig. 10 shows, in elevation, a shear tool according to the invention;

Pig. 11 shows in a larger representation the 'Part XI of in Pig. 10 is surrounded by dash-dotted lines .;

Pig. 12 shows a view of a variant of the element according to FIG Pig. 10;

Pig. 13 shows analogously to Pig. 9 a first variant of the device this Pigur;

Pig. 14 also shows analogously to Pig. 9 shows a second variant of the device of this Pigur;

Pig. 15 shows a third variant of the device according to FIG Fig. 9;

Pig. 16 schematically shows the operation of the tool according to FIG the invention of the Pig. 8, 9, 13 or H

Pig. 17 is a partial plan view or a partial section longitudinally the line XVII-XVII of the Pig. 18;

Pig. 18 is a section along the line XFIII-IVIII in Fig. 17;

Pig. 19 is a section along line XII-III of Pig. 18;

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Fig. 20 shows some of the tool and support of the shear device rods assigned according to FIG. 18;

21 shows analogously to. 18 shows a variant of the tool and the support or the stop of this figure;

22 shows analogously to. 19 shows a variant of the device to those? Fig .;

Fig. 23 is a section along the line XXIII-XXIII in Fig. 22;

- - - ■ ■■■ ι

FIG. 24 shows, analogously to FIG. 23, a variant of the device this fig .; ·

FIG. 25 shows, analogously to FIG. 18, a first variant of that Element of this figure;

Fig. 26 also shows a second variant 18 to the element similar to FIG. This figure. \

FIG. 27 is a top plan view of the advancing mechanism of FIG Shearing device to Fig. 4i and

Fig. 28 is a plan view of a shear device according to | of the invention, files being omitted.

1 of the drawings shows a fuel element at 1 with two inert ends 2 and a body 3, the one odac several cartridges, cartridges or sleeves 5 - in the following "Cartridges" called - includes those with a nuclear fuel 4 are filled and böndelföniiig by means of lateral spacers 6 are connected. The body 3 and the inert ends 2 are to each other by means of longjiifcttSLnaier intermediate pieces 7 (left part of the Fig.) and are optionally secured by a suitable number of cartridges 5 (right part of the Fig.). educated. These Cartridges made, for example, of stainless steel or a zirconium alloy, so-called "zircaloy", can

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Contain fuel powder based on natural or enriched uranium oxide and preferably in the form of pellets exist; but you can also use cartridges that have an outer jacket 5a (Pig. 1A) and an inner jacket 5b, advantageously Have aluminum, magnesium or a magnesium alloy, this jacket having a tube 4 made of metallic between them Fuel or a fuel alloy such as uranium or a uranium alloy, open or enclose ».

According to Fig. 2, the connection between the body 3 and the inert ends 2 ensured at the same time by means of a cladding 8 which is usually pierced by holes 8a and forms a tubular intermediate piece and has a longitudinally shaped intermediate piece 7 (left part of the figure) or a cartridge 5 (right part of the figure).

If you want to separate the nuclear fuel from the cartridges,

you ingin with it, one after the other or at the same time the / erts ends 2 to be sawed in such a way that it is separated from the one containing the nuclear fuel Bodies are separated. This body is then cut into pieces on a viewing device 9 (FIG. 3), with these pieces are then placed in the attack liquid bath. The attack liquid used is, for example, nitric acid, optionally with an addition of hydrofluoric acid, if a fuel powder based on natural or enriched uranium is to be dissolved, which in Cartridges made of stainless steel or of "Zirkaloy" are included, which are practically not to be attacked in a nitric acid bath Rather, a caustic soda solution is used when using cartridges made of aluminum, magnesium or a magnesium alloy wants to dissolve, which enclose a rod or a tube made of uranium or a uranium alloy, which in this Solution are insoluble.

It is found that in the former case it is essential to deliver the cartridges piece-wise or section-wise in such a way that the nitric acid is brought into contact with the powdered fuel. In the latter case, it is also good to have the

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To deliver cartridges in sections in such a way that the volume, the caustic soda bath is diminished.

The treatment installation in which the above-mentioned vrogangles are carried out is signaled by a cell 10 (Pig. 3) which is surrounded by a biological protective belt 11 and a sawing or cutting device 12 and a shearing device 9 which is assigned to a memory 13. With the help of known handling organs, which for this reason are not shown, the fuel elements 1 on the sawing device 12 is guided in order to separate the inert ends 2 (Pig. 1 and 2) from the body 3. This body is then transferred to the f Storage 13 of the shearing device 9 transported by means of a handling device 14, which for example consists of a Huban-r drive 15 and a loading table 20 consists. It is found that Table or storage are equipped with a feed device 21 (! 'Ig. 4), which is used to move the body 3 of the element to advance one step before the predetermined value p, for example from 20 to 30 mm. This feed device is of a type known per se and is represented globally for this reason by a pusher device 22 which is driven by a drive member 23 is actuated.

From this very Ii'ig. 4 it can be seen that the chamber 11 attached shear device 9 comprises a body 9a, the *

is closed at its upper part by means of a lid 24 which is fastened by suitable means 25, and at its lower part Ends with the help of a bottom 26 is closed in which a vent 2? is left out, which in connection with mJfc a dissolving device or a battery of dissolving tanks

28 is via a hose line 28a. Inside the body 9a of the shearing device are slidably mounted: a tool

29 and a tensioning device 30, which cooperate with one another and with a stop 31 firmly connected to the shearing device. The tool is a flat surface. 29a, which is arranged opposite the clamping device and in at least one Sohrägstufenrampe 35 (! "Ig · 5> 6 and 7) ends and has a

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other surface 29t »opposite the body 9a of the shear device with rollers 32 advantageously in this body, the tool and the clamping device are inserted. The stop 31 also has a flat surface 31a which is an extension of the flat surface 29a of the tool is arranged, as well as a surface 31b, which with the clamping device cooperates. Hydraulic cylinders 33, 34 serve to close the tool 29 and the clamping device 30 actuate, these working cylinders, preferably of the hydraulic type, being designed so that thrusts of each & ls Produce 250 tons and 60 tons if the fuel elements have a rectangular cross-section with one side of the order of magnitude from 200 to 250 mm. All values are given for the sake of explanation only and are not intended as limiting to look at.

In Fig. 5, a tool 29 of a known type is shown, which has 35 steps distributed over a single inclined ramp. This ramp is on the lower part of the tool arranged in such a way that the falling of the nuclear fuel into the vent 29 is facilitated, with roller carriage 36, are interposed between the tool 29, the - ^ oden 26 and the cover 24 of the shearing device, such that the displacement of the tool in this shearing device is facilitated will.

One can find that this tool allows simultaneous editing and to facilitate replacement, is advantageously formed by a cutter carrier and a cutter 40, on which the flat surface 29a (FIG. 4) is cut out, which entet corresponding to the inclined ramp 35. This cutting edge that rests on a support 38a of the cutter carrier, and gripper organs 40a, which is advantageously through a G-threaded bore are formed, includes, for example, one or more recesses 40b, engage in the pegs 38b of the scan edge carrier . In an analogous manner, the stop or counter-bearing 31 can be a socket carrier 41 fastened to the body 9a of the shearing device and a pan 42, which against a firmly with the pan

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nenträgeir connected .Anschlag or Aufläger 41a rests, wherein for example, foot parts 41b provided in the socket support gripping grooves 42a which are formed in the shape of a dovetail and which are in in the pan. The unwanted shifts of the cutting blade 40 in the blade carrier and the pan - which G-ripening organs 42b have analogous to organs 40a - are for example avoided due to a carriage 36 and due to a special shape of the cover 24.

If you want to replace the sheet 40 and the pan 42, you pull first the cover 24 and the carriage 36, for example by means of a manipulator, not shown, back with the im generally the treatment cells are equipped. Likewise with the help of this manipultor one then screws (not shown Threaded rods into holes 40a and 42b of the blade and pan such that they are removed from the shear device.

According to a modified form of construction (Fig. 6) Tool 29 or the blade 40 inclined ramps 35 »35a on ..

According to a further embodiment (Pig. 7) are the stages distributed over two parallel ramps 35, 35b, which just like the recess 4Ob are symmetrical with respect to a center 44, whereby the presence of a piece of food 45 ', which also · on the blade carrier 38 by means of a pin arrangement (without reference numerals) is arranged, as in the case of the tools of Figs. 5 and 6, the assembly or the removal of the blade 40 and the replacement of the ramp 35 by the ramp 35b allows.

The mode of operation of the prescribed shear device is the following:

You can (arrow F) by means of the feed device 21 the The body 3 advance into the magazine 13 until the front end of this body has passed the flat surface 29a of the tool by a distance p ', the rear end of the body in Contact with the bridging device 22 is / the activation

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of the working cylinder 34 (arrow G) then enables the Fuel cartridges! 3 against each other between the clamping piece 30 and the! 'Pool 31b of the support 31 to be pressed. the Cartridges 5 are then acted upon by the working cylinder tool 29 cut into pieces, which are in the Solution tank or in the solution tank battery 28 which are connected to the vent opening 27.

Due to the working cylinders 33, 34 the tool 29 and the clamping piece 30 can now be displaced in the direction indicated by the arrow H, the body 3 being advanced by new ones (arrow Έ) by means of the device 21 by one step from the value ρ ' . As mentioned above, the cartridges are then pressed between clamping piece 30 and support 31 and then cut with the aid of tool 29.

All of the above processes can be carried out automatically will - and will usually also be, with the working cylinder 33, 34 and the drive member 23 - how schema sch with Using the dash-dotted lines shown - over a Control device 45 are controlled, which need not be described separately, since this control device per se does not form part of the invention.

It is important, however, that the presence of a lateral Intermediate piece 6 (Pig. 1) in & r position is the cartridge sections to prevent them from breaking apart. If the tool 29 really does the fuel element before and after a transverse intermediate piece cuts - also at the point of this intermediate piece - connects this intermediate piece further the cartridge sections with each other and thus causes the formation of a mass with dimensions and & og those of the section 3a (Fig. 5) of a fuel element after compression between Clamping piece 30 and stop 31 emerge. Such a mass runs the risk of the dissolving tank 28 or the hose lines 28a to clog the opening 27 of the shearing device

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connect to the dissolving tank 28. In addition, this one Solution tank formed by a conveyor (not shown), which runs in an attack ^ liquid bath, which "is intended to dissolve the batons 5 or the nuclear fuel 4, the above-mentioned mass may protrude from the bath and thus ensure incomplete dissolution of the nuclear fuel.

The disadvantages mentioned are also obscured if the body 3 of a fuel element is cut into pieces with the shearing device S, which corresponds to the one in 'Pig. 2 shown IPyp. . | heard. In this case the body 3 is still surrounded by the panel 8 after separation of the inert ends 2 of the element on the sawing device sixteenth If one wants to press the cartridges 5 against the clamping piece 30 and against the stop 31 with the aid of the ArbeitszjLinder 34, this working cylinder also has the effect of pressing the casing 8 against the cartridges 5. It follows from this that the tool 29, which is acted upon by the working cylinder 33, simultaneously cuts off a mass in the body 3 which is formed by a casing ring which tightly encloses the cartridge sections. The Babfendlungsordnung (Fig. 3) must therefore

to include a dismantling device 46 on which the cartridge bundle j pulls out of the casing 8, the transport of the body 3 between the machine 12, the dismantling assembly 46 and the loading table 16, for example by means of the lifting drive 15. However, it should be pointed out that this dismantling device does not make it possible to remove the lateral intermediate pieces 6 from the body.

A shearing device according to the invention will now be described and shown how the above-mentioned disadvantages are avoided will.

According to one of these embodiments (FIGS. 8, 9 and 15), the tool 29 comprises this shearing device outside of its planar plane 29a, which ends in at least one inclined step ramp 35, a other flat surface 29c, which / one or more projections J7 with Ends 47a, the surface 29a of the surface 29o

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and distances separating the end 47a from the protrusion or protrusions have an equal value P greater than ρ whose pusher device 22 can move the body 3 forward when the Device 21 (Fig. 4) in effect ^ Lst. With the reference number 29a can thus at the same time limit the plane of the viewing ramp 25 Surface and the end 47a of the tooth or teeth 47 are designated, this end and this plane end on the tool - «protruding parts opposite the hollow part of it Form tool that is built up by the flat surface 29c. The operation of the Schervorrich shown in Figs. 8 and 9 device is the following:

As mentioned above, the body 3 is left in the magazine 13 (Fig. 4) advance in such a way that the anterior end of this body by one Piece ρ calculated in the direction of arrow F - extends beyond the flat surface 29a of the Weileeugs, the middle end of this Body is in contact with the pusher device 22. Switching on the working cylinder 34 then makes it possible, as above mentioned, the cartridges 5 and optionally a lateral intermediate piece 6 (Fig. 8) or the cladding 8 (Fig. 9) against each other to press between the clamping piece 30 and the stop 31; but if you operate the working cylinder 33 (arrow G), hollow the projection 47 has an incision 48, as indicated by dash-dotted lines in FIG. 9, in the cartridge bundle and in the side Intermediate piece 6 (Big. 8) or in the cladding 8 (Fig. 9). The tool 29 advancing further in the direction of arrow G then allows the cartridges 5 in sections and optionally that lateral intermediate piece 6 and the cladding or sleeve 8 cut that were already divided into two files due to the incision 48 made with the help of the projection 47 was. From this it follows, caß, that the two parts of the intermediate piece and the casing or sleeve still stretch the sections of the cartridge 5, the masses 3a (Fig. 9) of the sections thus formed dimensions smaller than the section 3a (Fig. 5) of the front end of the body of the element after compression between clamping piece 30 and stop 51.

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According to the in the Pig. 8 and 9 illustrated embodiment, said projection is formed by the free, preferably rectangular end 47a of a tooth 47 ', the other end 47b of which in an advantageously rectangular hole 49, which in the tool 29 is drilled, is fixed immovably by means of one or more screws 50.

According to the embodiment of the Pig. 10, the tool 29 comprises two teeth, the ends 47b of which are cut into incisions made in the tool 29 49 are mounted, the immovable fixing of these teeth with the aid of a rail 51 with screws 5Q ensured is, which is fixed am'Werkzeug 29 via suitable devices 52, for example via bolts and screws, such as shown in the drawing. It should be noted that these screws have a gripper element at the free end 50a, (Pig. 11) and have a threaded part 50b with an inside thread diameter fl which is inserted into the tool 29 (Pig. 8) or also into the Schäae 51 of this tool (Pig. 10 and 11) engages where a corresponding thread is worked out, with the other end 50c of these screws is advantageously cylindrical and has a diameter d ^ smaller than d. One avoids one in the pail excessive tensioner of teeth 47, the thread of screws 50 crushing and threading the tool and the rail, if you want to remove the screws 50 to damage.

According to another embodiment (Pig. 12) the tool 29 comprises three teeth 47 »so that the masses of the cartridge sections which are formed during the cutting process of the egg duck shell, smaller ones Have dimensions than in the pail where the We: teeug has only a single tooth (Pig. 9). According to the invention you can also attach a predetermined number of teeth greater than three to this tool in such a way that the dimensions the masses of the cartridge sections received on the shearing device are reduced; those in the Pig. 9, 10 and 12 are shown mounting options difficult to apply, increasing the number of teeth namely leads to the number of holes or incisions 49

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increase in the tool and reduce the cross-section of teeth 47, who are so dangerously weakened.

However, it is sufficient in any case to remedy this disadvantage in the tool / 4-9 In several planes perpendicular to the displacement

aurch

direction of the tool - indicated / arrows G and H - work out. These bores are arranged, for example, parallel to the single ramp 35 (FIG. 13) of the blade 40 or also like a checkerboard (as shown in FIG. 14), the cutting blade 50 then optionally having two inclined step ramps 35, 35a. This fastening of the teeth 47 is ensured by means of the screws 50 (FIG. 14), in that teeth are driven in by electron bombardment (FIG. 13) etc. with the application of force. It turns out that in the last two cases the end 47b ή or Kähno ·. of teeth 47 and the bores are preferably cylindrical.

These holes can also be frustoconical (FIG. 15) as well be formed like the end 47b of the teeth 47; the locking of these teeth is ensured by means of a screw 53, which are screwed onto a thread set 47c that is firmly connected to 47b is.

Regardless of the type of fastening chosen for these teeth, it is also advisable to use a tool that is formed by a knife carrier 38, where the pegs 38b (Fig. 8) or the peg holes 38c (Fig. 15) are cut out, which is also formed with a carrier 54 which rests in the lower part on the stop 38a (FIG. 9). This Carrier has a side 55 where tenon holes? 54a, (Fig. 8) or pegs 54b (FIG. 15) are formed which cooperate with the pegs 38b or with the peg holes 38c and have an upper part of a gripper element 54c (FIG. 8) which is advantageously formed by a threaded hole. The other Page 56 of this carrier comprises a part 56a, which can extend the surface 29a of the cutting blade 40, as well as another Part - this forms the flat surface 29c of the tool - on

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which the teeth 47 and the cutting blade 40 are fixed. The two Parts 56a, 29c of this beam are connected along a surface 561), against which the sheet 40 is supported, the Befeistigumg this cutting blade onto the carrier 54 with the aid of suitable devices 47, for example by soldering (FIG. 9) Screws (Fig. 13) etc. is made.

In fact, it is not necessary to place the cutting blade 40 on the Carrier 54 by means of a tenon connection analogous to that in the usual one in the embodiment shown in Fig. 4 used to store, lifting of the carrier equipped with the particularly wear-sensitive teeth 47 and the cutting blade can take place, for example, by - once the Deekel 24 and the carriage 36 dismantled with the help of the whole manipulator are - a (not shown) threaded rod in the Hole 54 ° fastened.

It should be noted, however, that when the cutting blade two parallel ramps 35, 35b (Fig. 12) the syme4triseh towards the center 44 are the fastening devices 57 which are preferably formed by screws, detachable and symmetrical towards the center 44 must be such that the resetting of the cutting blade and the use of the ramp 35b is possible becomes when the cutting blade 35 is worn.

In addition, preliminary tests have shown that formation of the incision or the incisions 48 can be verbesart if the stop 31 or the Pfaim 42 in its surface 31b a or a plurality of grooves 60 which are arranged in an extension of the projection or also projection 47c correspondingly the direction of arrow G, these grooves can advantageously be made by milling or grinding. By starting the clamping device 30 one can actually now the cartridges 5 and the intermediate piece 6 (Flg. 8) or die.Hülse 8 press against stop 31 or the pan 42, an adaptation (Fig. 16) of the grooves 60 and the intermediate piece or the cladding or the intermediate piece and the

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2003081

clothing is made. If the tool is now operated in the direction of arrow G, the projections 47 of the tool arrive opposite the grooves 60, these then overflow and tear the parts of the cladding and the intermediate piece which could possibly have clogged the incisions 48. One goes consequently, due to the shearing device according to the invention, ensure that the cut T-ßil of the body 3 in a number of masses 3a of cartridge sections by one unit greater than the number of projections or those recessed on the tool Teeth divided.

According to a modified embodiment (Fig. 17) the tool comprises 29 protruding parts 47a - at which said surface 29a can be reduced - which are separated by grooves 61 which have a bottom or a part with cavities on the surface 29c and for this reason with the same reference points is designated. The protruding parts and the groove bottoms end in a ramp 35 (FIG. 18) or in lamps 35 »35a (FIG. 21). The stopper 31 also includes projecting parts 62 separated by grooves 63 and one provided on the surface 31a Have bottom, which for this reason have been designated with the same reference numerals. Diase grooves and the protruding ones Parts 62 are each indicated in the extension of the projecting parts 47a and the grooves 81 of the tool. From this it follows that when the tool is moved in the direction of arrow G, the protruding parts of the tool and the Penetrate stop in the grooves of this stop and this tool.

It is now to the operation of the shearing device are described indung after He-J as in the 1 ^'1 Ig. 17 to 26, by allowing the body 3 to be pressed between the tensioning piece 30 and the stop 51 after this body has advanced (arrow F) under the action of the feed device 21 (FIG. 4), the front end being pressed through the body Over the projections 47a of the tool by a distance equal to ρ 'runs out.

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If you let the tool advance in the direction of arrow G, so these projections work cutouts 48 (Fig. 18) with a depth ρ in the front end of the body 3, wherein the bottom 29c of the cement 61 remains ineffective. The parts of the cartridges, 'the intermediate piece and the jacket, which initially the places occupied by the incisions are driven into the grooves 63 of the stop 61, after which they are removed from the body were released when the protruding parts of the tool and äs stop in the Kuten this stop and this Penetrate the tool. The continued advance of the tool in the direction of arrow E thus makes it possible to move out of the stop 31 to drive out the parts of the cartridges, spacer and case | and it via the outlet opening 27 into the solution tank or in drop the battery of dissolving kettles 28 (Pig. 4).

The tool and the clamping pieces are now allowed to move in the direction indicated by the arrow H, the body being advanced by a new one (arrow P) by one step of the value ρ due to the device 21 and then being pressed between the stop 31 and the clamping piece 30. The advance of the tool in the direction of the arrow Gr then makes it possible that the egg cuts 48 are deepened and the parts 3A of the body are sown with separation due to these cuts by means of the bottom 29 c of the grooves 61, if the distance P is less than twice of the distance ρ. . i

If this is not the case, the body 3 (arrow P) is allowed to run forwards as often as is necessary so that the bottom 29c the parts 3a can cut, this feed process said movements of the clamping piece and the tool in the direction of the Arrow H are connected upstream.

From the above it follows that the shearing device according to the invention allows the body 3 to be cut into pieces with dimensions smaller than that of the grooves 61 to be crushed with the intermediate piece 6 and the sleeve 8 clamped and then between Tool and stop 31 during the movement of the tool be cut in the direction of arrow G * This avoids

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the mass formation of cartridge sections that would be able to the dissolving tank 28, (Pig. 4) or the hose lines 28 $ t to clog and "impede the solution of nuclear fuel or cartridges."

From Pig. 17 you can see that the grooves 61 by forging in of the surface 29a of the tool 29 of the shearing device and then with the help of a milling cutter, a grinding device or a circular tool 28 may be machined, the tool 29 of the shearing device then being a suitable one Receives hardening treatment. The grooves 61 point against in this lall of the lamp 35 has a rounded part 61a which advantageously cooperates with a cavity 30a which is left in the clamping piece and its effect is to release any fragments of the body of the fuel element from the tool to facilitate.

In an analogous manner, the grooves 63 by forging in a Surface 31 c of the stop may be preformed in the extension of the bottom 29 c of the grooves 61 and thus at a distance P is located on the face 31a of this stop. The grooves 63 are then made with the aid of the tool 58 or an analog Tool, the stop then takes on a suitable hardening treatment. It turns out that, in order to gate forming and to facilitate the machining of these grooves, it is advantageous to attach the stop to the end of the body 9a by welding to be attached by means of a welding bead 31d, by pressing on, etc.

According to a first modified embodiment (FIGS. 18 to 21), in the opposite the clamping piece 30 and the stop 31 Located part of the tool, a bearing 64 is attached, which has walls 64a, 64b, 64c and a bottom 29d. On this Walls and on this floor are rails 65, 66, advantageously made of a tool steel with thicknesses of two different Soldered values, the difference of which is equal to the above-mentioned distance P, with a rail 65 always at least along one rail 66 and vice versa. In addition, one of the linden rests

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65a, 66a these rails the wall 64d of the / bearing 64, the other ends 65fr, 66b of these rails! form the inclined ramp 35 {Mg. 18) or the viewing ramp 35> 35a (Mg. 21). It follows that the tool constructed in this way is according to the invention at least one inclined ramp 35 * protruding parts 67 standing of rails 65 and Itfuten, the bottom through the rails 66 is formed, one can also in the area 31b of the stop and in the part of the stop near this surface a bearing 67 with walls 67a, 67b, 67c and a bottom 31d provide. On these walls and on this floor are Rails 68, 69, advantageously soldered from tool steel, which have two different thicknesses, the difference of which is the same the distance P, a rail 68 always running at least along a rail 69 and vice versa. It also touches one of the ends 68a, 69a of these rails, the wall 67a of the bearing 67; extend the other ends 68b, 69b of these rails the surface 31b of the clamping piece. The stop thus formed comprises according to the invention protruding parts 63, which by means of rails 68 are formed, as well as grooves 63, the bottom 31a of which is formed by means of rails 69.

The cross sections of the rails 65, 68 can be the same, as well like the cross-sections of rails 66 and 69, the width of the latter must be greater than that of the rails 64, 68 in order to maintain a clearance between the tool and the stop.

In a second embodiment (FIG. 21), screws are used in addition, on the tool and. to attach the rails 65, 66, 68, 69 to the stop, in this case a body made of ordinary Steel, which is penetrated by the screws 70 and bands 65a ■ 65b, 66a, 66b, 68a, 68b, 69a, 69b made of a material with a Have a hardness greater than that of ordinary steel, for example from tool steel or a metal carbide. You can do that

Replace the / close rails and also these piece by piece Flip rails over such that ends 65a, 66a, 68a, 69a are used when ends 65b are dead.

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The same applies if the rails of the tool and the Include stop pins 71, 72, 73, 74, which cooperate with pin holes 75, 76, 77, 78 in the tool and in the stop are recessed. As shown in the drawing (FIG. 22), the rails 66, 69 are used to fasten the rails Mortise holes 76, 78 are advantageously arranged and used at distances equal to the stated value P of the mortises 75, 77 to fix the rails 65,68, which are then of a thickness equal to that of the rails 66,69. In addition, you can i ¥ &schenstucke 80 of a certain thickness 3, which is advantageous are soldered to one of the series of rails of the tool or the stop, between the rails in such a way are introduced that the grooves 61 or 63 (Fig. 20) widths larger than those of the projections 67a, 62 are given. From this it follows that it is possible to form a tool and a stop according to the invention by working on this tool and on the same rails are attached to this stop, this tool having a single inclined ramp 35 (Fig. 24) or two inclined ramps (35, 35a (Fig. 23).

It is also advantageous (Figs. 25 and 26) in front of the front ends of the projections 47a - or in front of the ends 65b, 66b of the rails 65, 66 - and behind the rear ends of the projections 47a or behind the ends 6ija, 66a of the rails 65, 66 - Brelche 81, 82 which are at a distance greater than P from the projections 47a, that is, opposite the ground 29c of the grooves 61 are set back; the terms "in front of" "behind" (each in the local sense), "in front of", "behind" (each in the temporal sense) relate to the direction indicated by the arrow Gr. One facilitates the release from the Grooves 61 of the cartridge texle of the case or of the intermediate pieces that may have been torn off on the body 3 and prevents the area 8I of the tool rubs against this body when the bottom fi9c of the grooves 61 intersects this. The areas ü1, Ü2 can incidentally at the same distance from the bottom 29c of the Wuten arranged and also slotted in a single area 81a which surrounds the grooves 61 and the protrusion 47a, the surface 29a of the tool then facing these

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Jumping is reduced.

In an analogous manner, an area 83 is reserved on the stop 3.1, which is at a distance greater than P from the protrusions 62 - i.e. opposite the bottom 31a of the hats 63 springs back and the end furthest from the tool these grooves are limited. This area, the puncture of which it is, parts of the cartridge, casing, case or spacer, which have been cut from the body 3 with the aid of the tool 29, to release from these grooves may extend along the projections 62 or the grooves 63 of the bearing, the surface 31a of this bearing is then reduced at the bottoms of the grooves 63 ..

According to the embodiment of the Pig. 25, where tool and stop were prepared by forging, as is the case with the pail of Pig. 17 is - the areas 81, 82, 83 in this forge can - • \ organg The presence of these areas then offers the advantage of machining the grooves 61 and 63 simplify. "" ■,

Finally, it should be noted that, as mentioned above, it is expedient to have a tool formed from a cutting blade carrier 38 and a carrier 54, which is attached to the tool carrier 38 Zapfen'und Zapfenloch is arranged to be used, the Grooves. 61 are recessed in this carrier. The grooves 63 can also cut out in the pan 42, which is provided by tenons and mortise is mounted on the cutting blade 41, the Aus This pan support and the pan existing arrangement 42 as mentioned above, the stop 31 forms.

As can be seen in Mg. 24, for example, de! Carrier 54 with tenon rails 65, 66 of the same length and analogous to those of Pig. 22 equipped. The ends 65b, 66b of these rails form the inclined ramp for the steps 35, their ends 65a, 66a form. then the parallel ramp 35b. A Pttllatück 84 advantageously mounted on the carrier 54 by a tenon connection (84a) and 85 makes it possible to fix the rails 65 and 66, with the from

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The arrangement consisting of these rails, the carrier 54 and the filling piece 84 and the assembly of the carrier 54 on the tool carrier 38 by means of a mortise and tenon connection - reference number not mentioned - is symmetrical (with respect to a predetermined positioning center point. It follows that the ramp 35 can be driven by the parallel ramp 35b can be replaced if, for example, once the cover 24 (I ¹ Ig. 19) and the carriage 36 have been dismantled with the aid of the manipulator mentioned - a threaded rod (not shown) is fastened in the hole 54c.

In the above description it has already been pointed out that table 20 or magazine 13 (5 ¹ Ig. 3 and 4) are equipped with a feed device 21 of a type known per se, which is used to move the body 3 of the fuel element by a certain distance Let the value ρ (arrow F) run forward.

This device (Fig. 27) can for example consist of a motor group, a reduction gear (86) with a starting member 86a is equipped, which at the time with the control device 45 is shown schematically in dashed lines Lines connected and is able by means of a transmission organ 87 - advantageously made up of pinions 88 and a chain 89 and a chain extending through the protective space 11 Shaft 90 is formed. A pinion 91 is mounted on this shaft 90 and cooperates with a rack 22a (FIG. 28), which is provided on the pusher device 22, the pusher device being displaceable on the not shown Loading table 20 or on the magazine 13 (FIG. 17) via bearings 92. In addition, the shaft 90 enables rotation - With the help of one advantageously formed from pinions or pinions Translator 93 - to bring about a wheel 94 provided with a finger 95, the finger with an electric Switch 96 is connected, which at the time is connected to the starting device 86a of the motor 86 via conductors that irie are indicated schematically by dashed lines.

The arrangement denoted by the reference numerals 86 to 96 form-

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det the said. Motor organ 23, "being the bath 94 due of the choice of devices 87, 93 and gear 91 make a complete revolution when the pusher device 22 by a step of the value ρ under the action of the motor runs forward. ■

In addition, it is possible if you want to separate the control device 45 and the switch 86 from the start-up organ 86a from Hand to control the motor 86 and the pusher device 22. You can thus (arrow P) lead the body 3 in dB magazine 13 let up the anterior end of this body a little ρ (Pig. 4 and 8) overflows the flat surface 89a, where the rear end of the body is in contact with the push-button device 22 is located.

Finally, although the direction of movement of the tool and the clamping piece (arrows P and G) can be considered as horizontal in Pig. 4 this direction was also shown vertically, as in the embodiment of the Pig. 28 indicated, run.

After that pig. the shearing device 9 is attached to a horizontal part 1.1a of the protective chamber, the opening 27 is then in the body 9a of the shearing device and no longer in out the bottom 26 of this shearing device. In addition, the direction of displacement of the tool 29 and the clamping piece 30 vertical, like the arrows E and H, which symbolically indicate this.

The feed device 21, which serves to the element body 3, (arrow P) to allow a piece of the stated value ρ to run forward, always remains the same or very similar to the construction method the fig. 27; it is possible according to the invention, for example, to provide a projection 47 of height P greater than ρ on the tool.

The embodiments of the invention described above, were only given as an example} constructive changes in the

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The scope of the invention is readily possible.

Claims

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Claims (39)

Patent claims My shearing device for a treatment arrangement for irradiated Fuel elements of the type with a feed mechanism which serves to move the element in the shear device one way to let the predetermined value run forward, with a fixedly connected to the shear stop with a surface against which can support the element, with a with the stop and with this element cooperating clamping piece and a Tool with at least one step ramp and a surface located opposite the clamping piece, the tool and the clamping piece in the shear device for sliding displacement in a certain | Direction are stored, characterized in that the opposite-r the clamping piece (30) located surface of the tool (29) at least one protruding part (29a) and one hollowed out Has part which are separated from each other by a distance greater than the piece by which the feed device (21) allows the element to advance in the shearing device (9). 2. Shearing device according to claim 1, characterized in that the tool (29) has a first plane surface ending along at least one step ramp and at least one tooth which has two linden trees, one of which is attached to a second plane surface of the tool, the other end of this a tooth and the first flat surface of the weaving tool being removed from the second flat surface of this tool by a distance of a value greater than the piece to which the feed device -the body (3) of the element in the shearing device (9) can run forward. 3. Shearing device according to claim 2, characterized in that a tooth is mounted in a hole at at least one of the ends which is drilled into the second flat surface of the tool, the fixing of this end in the hole is ensured by suitable means. 4. Shearing device according to claim 3, characterized by a 009837/1830 in the tool engaging screw to define this end with rectangular cross-section, in the likewise rectangular hole. 5. Shearing device according to claim 3, characterized in that that this end having a circular cross-section in the likewise circular hole by driving this end into the hole he follows. 6. Shearing device according to claim 3 »characterized in that the definition of this end with a circular cross-section in the also circular hole takes place in which this end is welded in the hole by electron bombardment. 7. Shearing device according to claim 3, characterized in that a tooth is a frustoconical in a also frustoconical Has end supported by the hole, while the fixing of this end in the hole is ensured by a screw which is screwed via a threaded attachment firmly connected to this end. 8. Shearing device according to one of claims 2 to 7, characterized in that that the second surface of the tool is pierced by at least two holes in which the teeth are fixed, these holes in several planes perpendicular to the predetermined direction of sliding of the tool and the clamping piece in the shearing device are arranged. 9. Shearing device according to claim 8, characterized in that the first flat surface of the tool in a single step ramp ends, the holes drilled in the second flat surface of the tool being arranged parallel to this single ramp are. 10. Shearing device according to claim 8, characterized in that the second flat surface of the tool of at least three perforated holes arranged like a checkerboard, in which the teeth are attached. . 009837/1530 11. Shearing device according to claim 2, characterized in that that the ends of at least two teeth are provided on the tool Incisions are stored, laying down the. Teeth in these incisions via a suitable one on the scoop Devices attached rail and at least two screws engaging the rail 12. Shearing device according to claim 11, characterized in that the rail is attached to the tool with bolts and screws. 13. Shearing device according to claim 4 and / or 11, characterized in that that a screw at one end has a gripper element and a threaded part of a certain threaded bottom diameter which engages in the tool or in the rail, the other duck of this screw cylindrical and of a diameter is smaller than the thread bottom diameter of the threaded part. 14. Shearing device according to one of claims 2 to 13, characterized in that the tool is formed by a cutter carrier (38) and by a carrier (54) which is fastened to the cutter carrier by tenoning, this carrier has two flat surfaces of the tool. 15. Shearing device according to claim 1 and / or 2, characterized in that that the surface of the stop against which the body of the fuel element is supported, one in the extension accordingly the displacement direction d4s tool and the clamping piece arranged recesses and in the displacement direction one having Zatuv attached to the second flat surface of the tool. 16. A shearing device according to claim 1, characterized in that the tool and the stop have projecting parts separated by grooves, the grooves having a bottom arranged at a certain distance from these projections, 009837/1530 this distance being greater than the distance that the feed mechanism advancing the element body in the shearing device with the protruding parts and the grooves of the tool form at least one step ramp and in each case in the extension corresponding to the direction of displacement of the Tool and the clamping piece of the grooves and the protruding parts of the stop are arranged. 17. A method for manufacturing the tool according to claim 16, characterized in that by forging the grooves and * jumping parts of the tool are pre-machined and that machined these grooves with the aid of a circular tool, for example with the aid of a milling cutter or a grinding device The tool then receives a suitable hardening treatment. 18. Tool manufactured according to the method of claim 17 »characterized by a flat surface in which the grooves are recessed which end at one end with correspondingly rounded parts and at the other end with at least one inclined ramp, which is inclined with respect to the direction of displacement of the tool and the clamping piece in the shearing device. P 19. Tool according to claim 18, characterized in that the rounded parts of the grooves are recessed with one in the clamping piece Cooperate cavity. 20. A method for producing the stop according to claim 16, characterized in that the grooves and the forging protruding parts of the stop are pre-upset, these grooves with the help of a circular tool, for example a pre-machine and a grinding machine are processed and that the stop is subjected to a suitable hardening treatment and the stop is secured in the shear device. 21. Stop, produced according to the method of claim 20, characterized by a flat surface in which grooves are recessed 009837/1830 which terminate at one end with correspondingly rounded ends, the other end of these grooves extending the surface of the stop against which the body of the fuel element is able to be supported. 22. Shearing device according to claim 16, characterized in that the tool has a bearing in which one-s of the ends is fixed by two rows of rails having two thicknesses the difference of which is equal to this predetermined value, the other end of the rails forms at least one step ramp that compared to the direction of movement of the Werkaeugs and the clamping piece is inclined in the shear device. 23. Shearing device according to claim 16, characterized in that that the stop has a bearing in which one of the ends of two rows of rails is fastened, which have two thicknesses, the difference of which is equal to the specified value, with the other end of the rails extending the surface of the bearing, against that the body of the fuel element is supported. 24. Shearing device according to claim 22 and 23, characterized in that that the rails have only two sections, of which the one having a thickness and a width each of a value smaller and greater than the thickness and width of the other portion. - · 25. Shearing device according to one of claims 22 to 24, characterized in that the rails are soldered in bearings. 26. Shearing device according to one of claims 22 to 24, characterized characterized in that the rails have a body made of ordinary Steel and ends made of a material of a hardness higher than that of ordinary steel, with the fastening These rails are secured by screws that hold the body enforce the rails. 27. Shearing device according to claim 16, 'characterized in j 0 09837/1630 that the tool has two rows of identical rails which cooperate with two rows of mortises Have tenons, the former being recessed in the tool and the distance between the tenon holes of a row and the mortises of the other row equal to this predetermined one Is worth. 28. Shearing device according to claim 16, characterized in that the stop has two rows of the same rails, which cooperate with two rows of mortises recessed in the tool and the distance between the mortises is one ft | Row and the mortises of the other 'row like this one predetermined value. 29 «Shearing device according to claim 7 and 8, characterized in that that the rails of the tool and the stop are identical. 30. Shearing device according to one of Claims 27 to 29, characterized in that the pins of the shi'enen in pin holes are fixed by means of screws. 31. Shearing device according to spoke 27 to 29 »characterized in that that garbage of a certain thickness against a row of rails ψ of the tool and are soldered to one of the rail rows of the stop. 32. Shearing device according to claim 16, characterized in that the tool has areas (81-83) which are opposite to the The bottom of the groove are set back and limit the ends of these grooves. 33. Shearing device according to claim 16, characterized in that that the tool has an area which is set back from the bottom of the groove and which surrounds these grooves, as well as the protruding ones Includes parts of the tool. 009837/1530 34. Shearing device according to claim 16, characterized in that that the stop is a recessed with respect to the bottom of the. This stop has grooves provided area that is against the end of these hats furthest from the tool. , 35. Shearing device according to claim 16, characterized in that that the tool consists of a cutter carrier (38) and a carrier (54) fastened to the cutter carrier by a tenon connection consists, with the projecting parts and the grooves of the tool are recessed on this carrier. 36. Shearing device according to claim 16, characterized in that that the stop is formed by a pan support and mounted on the pan support by means of a pin connection Tenons, the projecting parts and the grooves of the tool being provided on this pan. 37. Shearing device according to one of claims 27 and 35 »characterized in that the carrier with rails with pins is identical Length is equipped, which are fixed on the carrier with the help of suitable means and the ends of two parallel inclined step ramps form with respect to the direction of displacement of the tool and the clamping piece in the shearing device, the arrangement from Beams and rails symmetrically with respect to a certain " Positioning center is. 38. Shearing device according to claim 37, characterized in that that the rails are fixed on the carrier by means of a filler piece, väches by tenon connection on the tool carrier is mounted, consisting of the carrier, and rails and filler piece ordering arrangement symmetrical with respect to the determined Po-, '! itionierungsmittelpunktes is. 39. Treatment arrangement for irradiated fuel elements with a shearing device according to one of the preceding claims. 009837/1830 Blank page