BG100073A - Heat radiation assembly of a nuclear reactor and a device for the assembly and disassembly of a head of the heat radiation assembly - Google Patents

Abstract

The heat radiation assembly and the device are used in nuclear power engineering. The assembly includes a manifold of heat radiating components, tubular grooves (3), spacing gratings, a dovetail and a removable head (5) having an upper (8) and lower (6) plate fitted on guiding bushings (11) by means of springs (10) and spacers (16, 17). The locking device is in the form of a plate (12) fixed to the lower plate (6) having apertures (18) in which the lower ends of bushings (11) are fitted. The assembly and disassembly device for the head (5) of the assembly operation includes a housing (41) with apertures (46) for the bushings (11), a core (43), C-shaped levers (42) connected to housing (41) and core (43) and grips (50) connected to levers (42), interacting with the lower plate (6) of head (5). Guiding stems (44) are inserted in apertures (46) of housing (41) which in their lower part have cones (54) for mounting the bushings (11).

Description

The invention relates to nuclear power, and more specifically to a heat-emitting assembly of a nuclear reactor and to a device for mounting-dismantling a head of a heat-emitting nuclear reactor and to a device for mounting-dismantling a head of a heat-emitting nuclear reactor.

The invention is used by thermal power plants, especially for nuclear power reactors, in the operation of those thermal power plant assemblies, also by waste fuel processing plants.

Known thermal radiation assembly of a nuclear reactor (US patent N 4687619, G 21C 19 \ 20, 1987), consisting of a bundle of thermal radiation elements placed vertically in

a skeleton assembled by spacer grilles secured to tubular ducts to the projecting edges to which they are attached, bottom-tail, and a retractable head that contains lower and upper plates with openings mounted on projecting bushings extending through these openings, such as tubular attachments fixed to tubular ducts by means of annular grooves encircling the annular collars located on those grooves.

Springs between the lower and upper plates of the head are arranged in a partially tight state with the guide bushings. The coherence of these springs and guide sleeves is ensured by the use of washers, which are inserted into sockets having a support plate. These washers come in with the help of their annular projections of the upper forehead into a gap between the walls of the guide bushes and the springs. Springs in the partially fluid state are restrained by two restraints: a lower restriction-

the wire is lower than the support plate and the upper stop is higher than the support plate. Two restraints are designed as sleeves that are attached to guide sleeves. The lower limiter restricts the downward movement of the dollar with the help of its foreheads

I |

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I on the slab, and the upper limiter - upward movement of the upper slab. Restraints prevent the springs from hanging down and up. Disconnecting the head with the tubular grooves чу clears with the help of a threaded connection of guide bushes and sleeves that serve as the upper support. On the outer surface

these sleeves are designed as longitudinal grooves by which the sleeves are screwed when the head is mounted or unscrewed when the head is dismantled. From an unexpected disconnect the head is fixed by means of a threaded joint stop. For this purpose, the elements of the walls of the guide sleeves are pressed into the slots of the upper face of the sleeves, this prevents the sleeves from rotating. Compound is separated by squeezing these elements back.

For mounting-disassembling the head of the heat-detecting assembly, a device is known that extends, first, from the housing, which is a tube which is mounted vertically, and second, from a guide stem, which is inserted into the inner cavity of the housing . The lower face of the housing has a projection system that is relatively relative to each other.

gently longitudinal grooves of the sleeves serving in the head as an upper stop, and a handle is attached from above. With the help of this handle, the housing is rotated about a guide stem or moved relatively vertically on both sides. The guide stem has a compression at the bottom, which is mounted on a rod of a hydraulic or pneumatic cylinder. This hydraulic or pneumatic cylinder is mounted in a stem body. At the top of the guide stem there is a handle, by means of which the compression is inserted into or removed from the guide bushings of the head. The compression is assembled between the collar having the end of the rod and the front of the cylinder. The compression is made as a rubber sleeve, which, under the influence of the rod of the cylinder, could increase in diameter. Thus, the compression does not allow it to slip the guide sleeves on the head when these sleeves are screwed (when mounting on the head) or unscrewing (when removing the head) (US patent N 4687619, G21C 19 \ 20, 1987).

In this heat-radiating assembly, it is a high labor-absorption of assembly-disassembly of the head, since the head is assembled and disassembled into separate parts, not immediately the whole. Thus, for example, when disassembling the head to provide access to damaged radiating elements, it must first disconnect all threaded sleeve joints with guide sleeves, then the sleeves must be unscrewed using a known device in sequence, and then sequentially must be removed. plate, all springs and lower plate with washers. After replacement of damaged radiating elements, all operations are repeated in reverse order.

In addition, the head mounting / disassembly device is required

··· ·

additional devices for manipulating separate parts of the head. This is especially necessary when there is a risk of exposure to maintenance personnel, for example when preparing assembly with uranium-plutonium fuel. In addition, devices for the protection of the individual parts of the head are necessary in order to eliminate the risk of their loss, especially during the NPP repair.

Also, there is a low safety of coupling of the head in the heat-radiating assembly, since the manipulation of separate parts of the head with the help of controlled remote devices does not exclude the possibility of thread damage, of both sleeves and guide bushes; there is also a likelihood of damage to the pipe ducts themselves if it does not ensure uniform tightening of the threaded joints, as otherwise in transport-technological operations with pipe assembly

the channels will be to load unevenly.

Using a head mounting / disassembly device, they only do the screwing or unscrewing of the liners and not the whole complex of head mounting / disassembly work at every stage: from production to processing of spent fuel.

Also known is a heat-emitting assembly of a nuclear reactor, which consists of a bundle of heat-emitting elements mounted vertically in a skeleton, which is assembled by spacer grids that are secured to tubular ducts. Assembly also includes a tail connected to the lower ends of the tubular ducts; a head that is at the upper ends of the tubular ducts and which can be removed remotely.

The head has lower and upper plates with openings. These plates are assembled into guide sleeves passing through these openings, ·· ····

at one end which has slots and annular grooves, providing separation of the head-to-pipe connection. The bushings are connected to the upper edges of tubular ducts protruding from the bundle of heat-radiating elements. Springs are inserted between the lower upper sleeve plates. In this state, the springs are held in place by two stops. The lower stop, which excludes the development of downward springs, is stretched like washers that are inserted between the bottom plate and springs in indentations formed by the sleeve face. The sleeves are fixed to the guide bushings. The upper restraint is designed as a removable plate which is located on guide sleeves above the upper plate. This one is removable

plate restricts the upward movement of the upper plate and the development of springs upwards. A downward movement limiter, which is designed as indentations having sleeves, restricts the downward movement of the lower plate. Elements designed as annular recesses with collars and as longitudinal slots having the ends of guide sleeves provide separation of the coupling to the head.

The detachable plate has openings with variable section. These openings are formed by the recesses between sliding plates, which comprise guide bushings at the bottom of the annular recesses, are touched by the use of their foreheads in the collars of these depressions, the head being mounted on assembly. In addition, the flexible plates are actuated by a special tool, which is inserted by longitudinal slots into guide sleeves capable of opening and leaking the ends of these sleeves, which are removed or mounted back (patent of ········· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ···

- b Germany N 2S45515, B21C 3 \ 04 1979).

A device is known for mounting-dismantling the head of the radiating assembly, which has a housing in the form of a plate, which has openings arranged relative to each other, similar to the displacement of guide bushes in the head. Device has

that a heart positioned higher than the hull coaxially with it, with the possibility of reciprocating displacement over a longitudinal axis. The body and the heart are interconnected by C-shaped posts. These levers are attached at the top

to the heart by means of the axes, which fit into the slots that the heart has.

In their middle parts, these levers are attached to the housing by means of hinges so that they can rotate around these hinges when moving and lowering the heart. At the bottom, the levers have grips that can be jumped and pulled apart with the bottom plate of the head when the levers are turned. The device also has guide stems attached by thread and nuts to an additional plate housed with a housing and a heart.

The additional plate is able to move the housing relatively vertically on two sides. The guide stems pass through the gap through openings having a housing, these stems are projected at the bottom as a cone for mounting them in the guide bushings of the head, while the ends of these stems will not lower below the lower plate arranged on these bushings. In addition, the guide stems have tools for opening the head and collar plates, by means of which, when the additional plate is lowered, the guide stems touch the ·· ····

to the heads of the guide bushes on the head. This indicates that the plate-dissolving tools are submerged at the required depth at which the coupling of the head is capable of being detached. The additional plate also has movable restraints, by means of which they press the upper plate, on the head, to facilitate the process of disconnecting a compound of the head (German patent N 2845515, G21C 3 \ 04, 1979).

When disassembling its head, the parts are clamped with guide bushings on the guide stems and held there by clamping levers until there is no need for a retainer to mount this head. In the event of a malfunction of the device or inadvertent rotation of the device, loss of parts may occur.

In this heat-transfer assembly, there is little security of the joint and the head, since it is not ruled out that the weakest element of the structure of this joint is damaged - on the plates, since they are affected by almost every load acting during the assembly. exploitation.

It is not possible to use the head-mounting unit to service several cartridges at the same time without additional devices for keeping the heads removed, which complicates the head-mounting process.

The low safety of the coupling and the complexity of its assembly and disassembly are particularly noticeable in the assembly of a large number of pipe ducts, for example, when eighteen pipe ducts are assembled.

It is an object of the invention to provide a heat-emitting creature

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- In the assembly of a nuclear reactor and of a heat-emitting assembly of a nuclear-emitting nuclear reactor with such structural implementation, which at the expense of the use of new structural units also allows to increase the safety of a head-to-pipe connection in a the absorption elements of a nuclear reactor control body are moved, and allows to simplify the process of assembly-disassembly of the heat-shrink head.

This task is accomplished by the fact that in a heat-emitting assembly of a nuclear reactor, consisting of a bundle of heat-emitting elements, which is arranged vertically in a skeleton assembled by spacers, fixed on tubular ducts, by a tail connected to the lower ends of tubes channels; from a head which is mounted on the upper edges of tubular ducts with the possibility of its removable removal and there is a lower and upper plate with openings placed on guiding bushings passing through these openings, at one end having slots and annular grooves securing the separation of the coupling of the head with the tubular ducts connected by the upper edges of the tubular ducts protruding from the bundle of heat-radiating elements with the support of their internal indentations in the forehead of the tubular ducts; springs mounted on guide sleeves between lower and upper plates, lower stop prevents the development of springs down, upper stop prevents the development of springs up, displaced guide sleeves above the upper plate, downward movement limiter of the lower plate; According to the invention, guide rods have longitudinal slots and inner annular grooves at their lower ends, connected to the upper ends ·· ····

- 3 of the pipe ducts, and the upper limiter, which prevents the development of springs upwards, is fixedly connected to the notched ends of the guide bushings, in this case the heat-emptying assembly has a locking device made as fixedly connected to the bottom plate by the openings in which they are disposed. lower ends of guide sleeves with longitudinal slots and annular grooves that enclose collars of tubular ducts.

It is advantageous for the upper stop to be designed as bushings which are fixedly attached to each guide bushing, and the lower stop and downward restraint of the lower plate is designed as indentations of guide bushings disposed below the lower plate.

It is also advantageous for the downward movement limiter of the lower plate to be provided as at least one clamp that connects the upper and lower plates and a limiter disposed at least one pipe duct below the locking device, and the upper limiter is made as bushings, which are fixedly fixed to each guide bush, the lower stop being formed as washers disposed above the lower plate and supported with support in the bushings of the guide bushings.

It is also advantageous for the lower plate lowering limiter and lower lower limiter to be met — and at least one clamp connecting the lower lower limb plate.

The object of the invention is also solved so that in the device for assembly-disassembly of the head of the radiating assembly of a nuclear reactor, which has a housing having openings,

positioned relative to each other analogously to guide bushings? a heart positioned higher than the housing coaxially therewith, capable of reciprocating longitudinal movement along the longitudinal axis of the housing, -C-shaped levers attached at its upper end by means of slotted axes to the heart, and in middle part attached by means of hinges to the body with the possibility of inverting them relative hinges when raising and lowering the heart, clamps placed in the lower part of the levers with the possibility of connecting and detaching them with the lower plate of the head of the radiating nuclear reactor at conversion rupture of C-shaped levers; guide stems housed in the openings of the housing, projected at the bottom as a cone, for mounting them in guide sleeves in such a way that the collars in the middle of the guide sleeves touch the ends of the guide sleeves, movable restraints to bend the upper plate of according to the invention, the guide stems are attached to the housing and are longitudinally arranged so that their lower parts, when mounted in guide sleeves, project relative to the lower faces of the guide sleeves , a pressure spring is mounted on each guide stem between the housing and the collar, and the housing is used as a movable stop.

The invention improves the safety of the coupling of the head to the tubular ducts in which the absorbing elements of a nuclear reactor control body are moved, and allows to simplify the process of assembly-disassembly of the head of the heat-radiating assembly.

This design of the radiating assembly allows · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·

to improve the installation and repair conditions of its manufacturing plants, allows it to shorten the repair period of the heat transfer assembly, also allows to improve the conditions of disassembly of the heat transfer assembly.

The heat radiating assembly and the mounting / disassembly device of its head have high performance, static and dynamic strength. This construction is acceptable for batch production.

The invention is further illustrated by specific examples and drawings, in which!

Figure 1 depicts a general view of a heat-emitting assembly of a nuclear reactor, with a section of its head according to the invention;

Fig. 2 is a general view of the head of a heat-emitting assembly of a nuclear reactor, longitudinal section according to the invention;

Fig. 3 shows a tubular groove, guide bushing and a portion of an enlarged scale bottom plate, longitudinal section according to the invention;

FIG. 4 is a cross-sectional view of a tube groove with a guide sleeve in accordance with the invention; FIG.

FIG. 5 is an embodiment of a heat-radiating assembly with a head provided with a clamp that connects the lower and upper plates according to the invention; FIG.

Fig. B is a general view of the head of the heat-radiating assembly, provided with a clamp which, connecting the lower plate with an upper limiter, a longitudinal section according to the invention;

Fig. 7 shows the head of the heat-radiating assembly with a device for mounting and dismantling thereof at the moment of coupling of a device with a head, longitudinal section according to the invention;

Fig. 8 shows the head of the heat-radiating assembly with its mounting-disassembly device at the time of removal of the head, longitudinal section according to the invention;

Fig. 9 shows the head of the heat-radiating assembly with the device for the mounting-dismantling device at the moment of detachment of the device with the head, longitudinal section; according to the invention.

The heat-emitting assembly of a nuclear reactor has a bundle of heat-emitting elements 1 (FIG. 1) that are arranged vertically in a skeleton assembled by the spacer grilles 2 attached to the tube ducts 3, also the tail 4 which is connected to the lower edges of the tube ducts. 3, the detachable head 5, which is provided at the upper edges of the tubular ducts 3 with a possibility of its remote removal.

The head 5 has a lower plate 6 with openings 7, the upper plate 8 with openings 9, the springs 10 which are inserted between the plates 6 and 8, in a partially pressed state also the guide bushings 11, contained with a gap in the openings 7 and 9 of these plates

6,8. Chapter 5 also has a plate-shaped locking device

12, which is swept at the level of the lower edges of the guide bushes 11 under the plate 6 and is fixed to the plate 6 by means of a clamping sleeve 13 (Fig. 1,2), for example, by welding.

The plate 8 has a clamping sleeve 14 (FIG. 1, 2) which has slots 15 for a comfortable grip on its head.

The clamping sleeve 14 can be joined to the plate 8 (Figure 2), for example, by welding.

The springs 10 (Fig. 1, 2) are held in a partially pressed state by means of the lower stops 16 and chase the blades.

backbones 17. These stops 16 and 17 are attached to the guide bushings 11, respectively, below the plate 6 and above the plate 8. The plate 12 has openings 18 in which the lower ends of the guide bushings lie along the longitudinal slots 19, connected to the upper ends of the pipe ducts 3.

Restraints 17 with the help of their lower foreheads

They detect upward movement of the plate 8 and prevent the spring 10 from developing upwards.

In this case, the upper stop 17, which prevents the spring 10 from developing upwards, is fixedly connected to the upper ends of the guide bushes 11.

Restraints 16 can be implemented, for example, by mechanical treatment, by indenting 20 (Fig. 2) the guide bushings 11 or by welding to the bushings 11 of the liners 21 (Fig. 5).

Restraints 17 (Figure 2) may be provided as bushings 22 or as sleeves 23 having a thread welded to guide bushings 11 after insertion of plate 8.

The head also has a downward movement limiter 24 of the lower plate 12, also made as indentations 20.

The guide bushings 11 of their lower ends are connected to a bundle of co-radiating elements 1 by the ends of the tubular channels 3 by means of a disconnect.

For this reason, the tubular grooves 3 (Fig. 3) have annular collars 25 with Chamfer 26 and 27. The guide bushings 11 below have flexible movable walls 28, slit slots 19, and inner recesses 29, beginning with the plank 30 and ending with the inner ones. · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·

- 14 indentations 31. On the cut walls 28 inside the recesses 29, the annular grooves 32 are provided with the Chamfer 33, these grooves 32 are arranged relative to the indentations 31 in the same way as the annular collars 25 are positioned relative to the ends 34 of the tubular grooves. 3.

When mounting the joint, the ends of the pipe grooves 3 enter the recesses 29 of the guide sleeves 11 until they reach the recesses 31 with the help of their foreheads 34. In doing so, the annular collars 25 interact with their chamfer 26 with the chamfer 30, squeeze into the sides. the recessed walls 28 of the guide bushings 11, enter the recesses 29 and face the annular grooves

32. Then, under the action of flexible forces, the cut-off walls 28 (Figure 4) return to the starting position and the annular grooves 32 encircle the annular collars 25, thus terminating the connection of the guide sleeves 11 with the tubular grooves 3.

Holes 18, which has a plate 12, secure this joint from unplanned unplugging. These openings 18 enclose, by means of their walls, the slit walls 28 of the guide bushings 11 and prevent the outlet ducts 3 from escaping, since the annular collars 25 are clamped by means of walls to the annular grooves 32. The longitudinal slots 19 and the annular grooves 32 of the sleeves 11 provide separation of the coupling of the head 5 with the tubular channels 3. By means of a clamping sleeve 13 and a lower plate 6 with lower stops 16 preventing its downward movement; and springs 10 that limit its upward movement, the plate 12 is held in · · · · · · · · ·

Fixing the fire.

Removal of the connection of the guide bushes 11 with the tubular grooves 3 is made after disconnection. For this, the plate 12 is raised up, overcoming the compression of the springs 10, while the cut walls 28 of the bushings 11 will not exit the openings

18. Then, by moving the guide sleeves 11 above, the annular collars 25 of their Chamfer 27 interact with the Chamfer 33 of the annular grooves 32, dissect into the sides the cut walls 28 and exit from these grooves 32. As all the main constituents of Chapter 5 are mounted on another component of the guide bushings 11 and retained therein by means of lower and upper stops 16 and 17, after disconnecting these bushings lie the tubular grooves 3 of the head 5 are completely removed from the heat radiating assembly.

Alternatively, the assembly has a head 5 (Figure 5) which has washers 35 and a clamp 36, also has a stop 37 disposed below the plate 12. A stop 24 is made as a clamp 36 and a stop 37. And the upper stop 17 is made as liners 23 (Figure 5). The washers 35 are disposed on the sleeves 21 between the plate and the springs 10.

The clamp 36 (FIG. 5) connects the plate 8 and the plate 6, the clamp 36 is fixedly connected to the plate 6, for example, by means of a threaded connection, and the clamp plate 8 is movable.

Tube stop 3 holds the plate 12 in the locking position when pressed on the plate 8, the clamp 36 ceases to hold the plate 6 in descending motion. Thus, the construction of the head 5 during assembly operation allows • · · · · ·

- 16 to compensate for the tension of the springs by 10 differences in the radiative and temperature growth of the pipe ducts 3, which is caused by the irregularity of energy separation over the entire assembly radius.

Alternatively, the assembly has a head 5 (FIG. 6), which is similar to the construction of the head 5, which is depicted in Figure 2. The difference is that an additional plate 38 and a clamp 39 are used in the head 5. 38 is disposed above the plate 8 and is joined, for example, by thread and weld with all guide sleeves 11. The clamp 39 connects the additional plate 38 with the plate 6, in the plate 6 the clamp 39 is fixed, for example, by means of a threaded connection , and the additional plate together with the clamp plate 8 9 are movable.

In addition, the clamp 39 keeps the plate 6 from descending when pushing the plate 8. In this way, the clamp does not allow the separation of the connection of the head 5 with the tubular channels 3. The stop 24 (Fig. 2) and the lower stop 16 are made as a clamp. 39.

Such a construction of the head 5 allows it to raise the resistance of the guide sleeves 11 to operating loads.

The heat-emitting assembly has a mounting-disassembly device 40 (Fig. 7) of Chapter 5.

The apparatus 40 has a housing 41 to which at least two C-shaped levers 42, a heart 43 and the guide stems 44 are attached.

The housing 41 is configured as a Figurative Plate 45, which has • is ·· ····

system of openings 46 disposed relative to each other analogously to displacement of guide bushes 11 in the head

5. The housing 41 may be centered relative to the bushings' 11 over a cover bushing 11 of the head 5, for example, by means of the recess 47 and the grooves 48, which enter the keyholes 15 for gripping the head 5 by means of transport-technological equipment.

The levers 42 are attached to the housing 41 by means of the hinges 49 in their middle part, with the possibility of overturning relative to the hinges 49 when raising or lowering the heart 43. In their lower part, the levers 42 have grips 50, by means of which they can jump or detach. with the plate 6 and the head 5 when the levers 42 are inverted, at the top these levers 42 have slots 51. With the help of these slots 51 on the axes 52, the levers 42 are connected to the heart 43. The heart 43 can be moved relative to the housing 41 vertically in both sides, for example, in the guide 53 of the housing 41.

Guide stems 44 are fit p clearance in the openings 46 having a housing 41 , and are fulfilled in the bottom your part as cone 54, in its middle part they have collars 55, a upper your part have which 56. Between the collars 55 and the housing 41 are the springs of tightening 57

The collars 56 connect the guide stems 44 to the housing 41 in an integrated construction and can be provided, for example, as nuts. Figures 8,9 show the mounting and disassembly device of the head at the time of removal of the head 5 and at the moment of disconnection of the device with the head 5, respectively

This assembly works as follows. The assembly is loaded into a nuclear reactor, in which case it enters, by means of its tail 4 (Fig. 1), into a special socket which has a support shaft in the reactor shaft (the reactor equipment is not shown in the drawing). After loading into the reactor, the required assembly number 20 is closed with a lid. In the lid

the reactor for each assembly is also provided with a special socket, which includes a clamping sleeve 14 with dowels 15. The reactor cover is then sealed against the reactor vessel) and put into operation. In the course of operation of a nuclear reactor, the heat-emitting elements 1 generate heat which takes in the heat carrier passing through the assembly. The coolant enters the assembly through the tail 4. The coolant passes through the beam of elements 1, then heated through openings in the locking plate 12 and the enclosing sleeve 13 exits

assembly limits and is discharged from the reactor.

The loads assembled in the reactor are produced by means of an overloaded machine, which, having clamps that mount on a clamping sleeve 14, is gripped by the dowels 15 (the overloaded machine and the clamps are not shown in the drawings). In the case of leakage of the assembly, the weight of the beam of the elements 1 is transmitted through the tubular channels 3 connected by means of the lower ends with the tail 4, to the guide bushes 11, which are connected by means of the annular grooves 32 and the annular collars 25 with the upper ends of these channels 3. The load stops 17 are then fastened to each sleeve 11 of the pad of the upper plate 6 connected to the clamping plate 14. The assembly is raised to the keyholes 15 and the circumference. • Bushings 14. The connection of the pipe grooves 3 with e.g. the bushings 11 are then fixed by unintentional disconnection by means of a retaining plate 12 which, by means of walls of its openings, 18 lower ends of the bushings 11 and prevents the annular collars 25 from flowing into the annular grooves 25 of the tubular channels 3. This is explained-

such that the lower plate b remains stationary when the assembly is raised, since the lower stop 16 restrains from moving down and the spring 10 from moving up.

As the reactor is sealed, its lid presses against the head of the enclosing sleeve 14, and the upper plate 8 is lowered along the guide sleeves 11 down and the springs 10 are kept stationary. 10, and from the movement of the lower stop 16 of the guide sleeves 11, which are supported by their inner indentations 31 on the ends 34 of the pipe ducts 3. The connection of the pipe tubes

no 3 with guide sleeves 11 and in that case is fixed by unintentional disconnection by means of the locking plate

12, since this plate 12 together with the lower plate 6 remains stationary, since it is connected to the lower plate 6 by a clamping sleeve 13.

When the reactor is sealed, its lid is removed and it ceases to press on the head of the enclosing sleeve 14. Under the action of the springs 10, the upper plate 8 returns to its original state to the upper stops 17. All other elements of Chapter 5 remain stationary, and therefore, the connection of the tubular channels 3 with the guide sleeves 11 • · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·

remains fixed.

The assembly work shown in Figure 2 is analogous to the assembly work shown in Figure 1, since these assemblies differ only in the performance of the lower and upper stops 16 and 17.

The assembly work shown in Figure 5 is similar to the assembly work shown in Figure 1. The difference is the following.

When the assembly is loaded into the reactor as it is moved, a portion of the head 5, which consists of the lower plate 6, comprising the sleeve 13 and the stopplate 12, remains stationary, and therefore the connection of the tubular channels 3 with the guide sleeves 11 remains Fixed by an unplugged disconnect due to the clamp 36 which keeps the lower plate 6 from moving downwards and thanks to the springs 10 which, through the washers 35, impede the movement of this plate 6 above.

When the reactor is sealed, when the clamping sleeve 14 and the upper plate 8 associated therewith begin to descend, the clamp 36 ceases to retain a portion of the head 5, which consists of the lower plate 6, comprising the sleeve 13 and the stopper plate 12, from motion down. A stop 37, which is disposed on a central conduit 3 under the locking plate 12, begins to operate. The springs 10, through the washers 35, impede the upward movement of part of Chapter 5.

Thus, and in one case, the connection of the pipe ducts 3 to the guide sleeves 11 remains fixed by a non-removable disconnection.

- 21 When the reactor is sealed, the pressure of the enclosing sleeve 14 weakens and the upper plate 8 returns to the upper position 17 by the action of the springs 10, which are configured as the sleeves 23, fixed to each guide sleeve 11. In its motion above plate 8 grips the clamp 36, which instead of stop 37

it starts to withhold from the downward movement mentioned above part of the head 5. The springs 10 through the washers 35 interfere with the upward movement of part of the head 5. In this way, in this case also the connection of the tubular channels 3 with the guide bushes 11. is in the Fixed state.

The difference in assembly work is that each pipe duct 3 can operate independently of the others. During the assembly operation of the reactor, due to the difference in energy separation over the assembly radius and the difference in material structure of the pipe ducts 3, the duct ducts 3 may receive different temperature and radiation extensions. Next

the extension, the tubular channel 3, by means of its forehead, begins to press on the inner indentation 31 of the guide sleeve 11.

The guide sleeve 11 by means of a face of a lower stop 16, which is designed as a washer 35, further tightens the spring 10. Thus, the guide sleeve 11 compensates for the temperature and radiation extension obtained by the tubular duct.

3.

The assembly work shown in Figure 6 is similar to the assembly work shown in Figure 1. The difference is as follows.

When loading the assembly into the reactor when it

- 22 lift, bundle the elements 1 through the pipe ducts

3, which are connected to the tail 4 down, is transmitted to the guide bushings 11, which are connected 'from above to the pipe ducts 3, and an additional plate 38 is adopted, which is disposed above the upper plate 8 and is connected to all guide bushings 11. The connection of the tube grooves 3 with guide sleeves 11 is then fixed with the help of the locking plate 12, since the clamp 39 through the plate 6 and the enclosing sleeve 13 prevents the movement of that plate 12 down, and the springs 10 through the plate 6 and the enclosing sleeve 13 obstruct movement above.

As the reactor is sealed, when the clamping sleeve 14 is pressed, the upper plate 8 on the guide sleeves 11 is lowered and compressed by the springs 10. When the springs 10 are clamped, they try to displace the lower plate 6 and connected thereto by a clamping sleeve 10. bushing 13 of the retaining plate 12. However, this movement prevents the clamp 39, which is retained by means of the additional plate 38 connected to all guide bushings 11 above the upper plate 8. In this case, the connection of the tubular channels 3 with the guide bushings 11 is securely fixed by cont driven disconnection.

When the reactor is sealed, when the load with the enclosing sleeve 14 is removed, it, together with the upper plate 8, returns to the additional plate 38 under the action of the springs 10. The remaining parts of the assembly head 5 remain stationary and the connection of the pipe ducts 3 with guide sleeves 11 remains fixed.

Assembler-Disassembly Head Assembly • · · · ···· • ··· • ·

- 23 net works as follows. Before mounting the device 40 (Figure 7) on the head 5, the heart 43 is removed downwards. As a result, the axes 52, which are fixed in the heart 43, interact with the slots 51, push the upper edges of the levers 42 down and rotate those levers 42 around the hinges 49 so that the lower edges of the levers 42 with the grip 50 are rolled into the sides. The guide bushings 44 are then introduced, for example, by means of an overloaded machine, into the inner cavities of the guide bushings 11 until the cover bushing 14 of the head 5 enters the recess of the housing 41 and the dowels will not enter the grooves 48. In this way the housing 41 is centered relative to the head 5. The housing 41 is then pressed and the plate 8 of the head 5 is lowered down the guide bushings 11 by the clamping sleeve 11 to the required distance H (28). 4) on the bushings 11 of the openings 18 (Fig. 7) of the plate 12 of the head 5 and the separation of the connection of the head 5 with the tubular channels 3. The springs 10 are then contracted.

At the same time, the springs 57 disposed between the housing 41 and the collars 55 shrink, since the collars 55 rest against the upper faces of the fixed guide bushes 11.

Then the heart 43 rises above. In this case, the levers 42, with the help of the axes 52 and the slots 51, rotate around the hinges 49 in the opposite side, as a result, the lower edges of the levers 42 converge and the clamps 50 are joined with the plate 6 of the head 5. Then, above the housing 41, the plate 6, which is supported by the clamps 50, pulls for itself the plate 12 and through the springs

- 24 10 pushes up plate S. When the height of housing 41 is H, the cut-off walls 28 of the guide sleeves 11 will protrude from the openings 18 of the plate 12, the plate 8 will reach the stops 17 of the head 5. In the further case lifting the housing 41, the plate 8 begins to pull on the stops 17 above the guide bushes 11. Then the annular collars 25 of the pipe ducts 3, which are held in place by a mass of the rest of the assembly, begin to interact with the help of their Chamfer 27 with Chamfer 33 in the ring grooves 32 and squeeze laterally cut walls 28 of guide sleeves 11. Then the annular collars 25 emerge from the annular grooves 32 and the connection of the guide sleeves 11 with the tubular grooves 3 is disconnected. Chapter 5 has been dismantled. The thus disassembled chapter 5 can be stored together with the device 40 or separately. In contrast, the head 5, which is kept together with the device 40, is mounted in the following order. The head 5, which is the coupling with the device 40, is guided, for example, by means of an overloaded machine, so that the ends of the guide stems 44 projecting into the plate 12 fit into the tubular channels 3. The head 5 is then removed downwards until the annular collars 25 of the pipe grooves 32 which interact with the Chamfer 30 in the guide sleeves 11, by means of their Chamfer 26, will not dissolve their permissible walls 28 and will not enter the annular grooves 32 when the tubal channels 3 with their foreheads 34 reach the projections 31, that they have in steers s bushings 11. In this case, the guide stem 44 using the coolest springs 55 and 57 interfere with any relocation

• · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·

upwards of the guide bushings 11. As the head 5 is further lowered down, the conduits 3 through the projections 31 push up the guide bushings 11 with their foreheads 34, and the guide bushings push the collars 55 until the springs 57 contract. Then the plate 10, the springs 10, the plate 6 and the associated plate 12 begin to move along the guide bushings 11 down to the stops 16, with the allowable walls 28 of the bushings 11 enter the openings 18 of the plate 12 and stop. of these bushings 11 with tubular ducts 3. Then the heart 43 is removed downwards. The heart 43 turns the levers 42 around the hinges 49 and releases the plate 6 from the clamps 50. Then the hulls 41 begin to lift up. Under the action of the springs 10, the plate 8 is lifted up to the stops 17. The head 5 is mounted. The guide stems 44 are then removed from the guide bushings 11 and the device 40 is retracted.

Separately from the device 40, the head 5 may be stored, for example, in a special rack which has taps to displace in them the edges of the guide bushes 11 and the guide stems 44 extending thereto. In this case, the head 5, which is coupled to the device 40, relatively direct the drains of the rack, for example, by means of a congested machine, so that the ends of the guide bush 11 and the guide stems 44 projecting into the plate 12 fit into these openings. The head 5 is then removed downwards until it is touched in a rack with the help of the plate 12. The heart 43 is then brought down. The heart 43 turns the levers 42 around the hinges 49 and releases the plate 6 from the clamps 50. Then, the hull 41 starts to lift up above the hull.

tab 10 is lifted up and the guides 17 pull the guide bushings 11 for themselves, until the guides 16 touch the lower surface of the panel 6. The guide bushings 44 are then removed from the guide bushings and the device 40 is retracted. Chapter 5 is secured to a rack until it has to be mounted on the assembly. Joining the head 5 with the device 40 after keeping the head 5 on a rack is done in reverse order.

The assembly of the structure has a more secure connection of the head 5 with the pipe ducts 3, and the process of installation and disassembly of such a head 5 is simple.

Claims (5)

Patent Claims 1. A nuclear reactor thermal assembly comprising a bundle of heat radiating elements which are arranged vertically in a skeleton assembled by spacer grids attached to the tubular ducts by a tail connected to the lower ends of the tubular ducts by a head which is mounted on the upper edges of the tubular ducts with the possibility of its removable removal, and there is a lower and upper plate with openings placed on guiding sleeves passing through these openings, at one end having slots and annular grooves, providing separating the coupling of the head with the tubular ducts, connected by the upper edges of the tubular ducts protruding from the bundle of the heat-radiating elements with the support of their inner indentations at the ends of the tubular ducts, springs which are mounted on the guide sleeves between the lower and upper plates, • · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ··· lower stop preventing spring development downwards, upper stop preventing spring development upwards, arranged on guide sleeves above up and a downward movement limiting plate, characterized in that the guide bushings (11) have longitudinal slots (19) and inner annular grooves (32) at their lower ends connected to the upper ends of the tubular ducts (3). and the upper stop (17) is fixedly connected to the upper ends of the guide bushings (11), wherein the heat-radiating assembly has a soldered device made as a plate (12) fixedly connected to the lower plate (6) by the openings (18), in which the lower ends of the guide bushings (11) are aligned with the longitudinal ones rorezi (19) and the ring ditches (32) covering the collars (25) of the tubular channel (3). 2. The heat-emitting assembly of a nuclear reactor according to π.1, characterized in that the upper stop <17) is configured as bushings (22), which are fixedly fixed to each guide bush (11) and the lower stop (16) and the downward movement of the lower plate on the lower plate is provided as indentations (24) on the guide sleeves disposed below the lower arm (6). 3. The heat-emitting assembly of a nuclear reactor according to π. 1, characterized in that the downward movement limiter (24) of the lower plate is configured as at least one clamp (36) connecting the upper and lower plates (8,6). and a stop (37) disposed on at least one tubular channel (3) below the shut-off device, and the upper stop (17) is configured as bushings (23) which are stationary. · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ········· attached to each guide sleeve (11), with lower face automatically set (16) is constructed as a pulley (35), superposed above the bottom plate (6) and fitted with a support in the way of the guide sleeves (11). 4. The heat-emitting assembly of a nuclear reactor according to claim 1, characterized in that the lower plate limiter (24) and the lower limiter (16) are arranged as at least one clamp (39) connecting the lower plate (6). ) with upper stop (17). 5. The device for assembling and dismantling the head of a heat-emitting assembly of a nuclear reactor having a housing having openings disposed relative to one another in analogy to guide sleeves, a heart disposed higher than the housing, in conjunction with it, capable of reciprocating displacement along the longitudinal axis of the housing, C-shaped levers attached at the upper part by axes located in the slots to the heart, and in the middle part by means of hinges to the housing with the possibility of inverting them relatively hinge and in the raising and lowering of the heart, clamps placed at the bottom of the fasteners, capable of coupling and uncoupling them with the lower plate of the head of the radiating nuclear reactor when the C-bars are turned, the guide stems contained in the openings of the housing, made in the lower part as a cone, for mounting them in the guide bushings in such a way that the collars in the middle part of the guide bushings' touch the ends of the guide bushings, the movable restraints for shrinking the burned plate of the radiant head the other assembly, the characters · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · - 29, the guide stems (44) being attached to the housing (41) and extended in such a way that their lower parts, when mounted in the guide bushings (11), project the relatively lower ends of the guide bushings (11), each spring (44) between the housing (41) and the collar (55) is provided with a pressure spring (57), and the housing (41) is used as a movable stop.