The way to recover the temperature compensator tract technological channel nuclear uranium - graphite reactor

 

(57) Abstract:

Essence: at the end of the pipe tract fixed guide, which lowered the barbell grip with suspension. The protective plate is lifted by the rod-gripper on the magnitude of the stroke of the temperature compensator, fix it to the sling. Then post-capture replace the optical drive in the gap formed between the protective plate and the graphite walls, consistently set segment elements bearing liner having a characteristic transverse dimension less than the diameter of the channel of masonry, to mate their lateral surfaces. First of all install the other segment items, and then they install a protective plate. 3 C.p. f-crystals, 16 ill.

The invention relates to techniques for operating nuclear reactors, and in particular relates to methods for the recovery of the temperature compensator tract technological channel (TC) nuclear uranium-graphite reactor, and can be used in the carrying out of major repairs.

In the published sources of information were not found information about how recovery temperatureheat way is to create a technical solution that allows you to perform recovery of the temperature compensator tract TC nuclear uranium-graphite reactor. The need to solve this problem arose from the fact that during operation of nuclear uranium-graphite reactor, radiation-thermal effects in the graphite blocks is volumetric radiation shrinkage, which leads to a significant reduction of the geometric dimensions of the reactor core. According to the results of monitoring conducted at the Leningrad NPP, a decreasing linear dimension of the height of the columns graphite reactor to 130 mm for 17 years. Nuclear uranium-graphite reactors provided constructive node that performs the function of the temperature compensator. The temperature compensator is made in the form of a telescopic connection of the upper tube duct and tube connection. Working stroke of the temperature compensator is equal to the value of 220 mm the Specified parameter is one of the main criteria for determining the duration of operation of the reactor. Radiation shrinkage of masonry on the value corresponding to the operating temperatures during the column graphite reactor.

In the method of recovery of the temperature compensator tract technological channel nuclear uranium-graphite reactor, made in the form of a telescopic connection of the upper tubular tract and coupling sleeve mounted on the upper protective plate graphite reactor, proposed at the end of the pipe tract to fix the guide in which the lower rod grip with suspension, the protective plate is lifted by the rod-gripper on the magnitude of the stroke of the temperature compensator, fixed on the suspension, then the post-capture replace the optical drive in the gap formed between the protective plate and the graphite walls, consistently set segment elements supporting liner, having a characteristic transverse dimension less than the diameter of the channel of masonry, to mate their side surfaces, and first of all establish the other segment items and then all the inserts install a protective plate. In addition, the proposed prior to lowering the rod capture channel graphite set the container-trap, before installing segmental elements to produce the bore annular groove in the upper end face of the main monitor, fitted in the lower part of the manipulator.

In Fig. 1 shows the path of the LC; Fig. 2 - tract TC dened in container-trap, and rack of Fig. 3 - the path of TC installed on the top of the pipe path of the guide; Fig. 4 - the path of TC with established post-seizure and suspension of Fig. 5-the protective plate in the raised position; Fig. 6 - protective plate in the holding torque on the suspension of Fig. 7 - upper tract with the installed adapter of Fig. 8 - the path of TC installed in his arm at the time of installation of one of the segmental elements of the support liner; Fig. 9, 10, 11, 12, 13 - the installation sequence of a segment of the element of Fig.14 - tract TC installed base liner; Fig. 15 is a cross-section of the support liner that is installed between the upper protective plate and the graphite walls of the reactor of Fig. 16 is a view of a of Fig. 15.

The path of technological channel (Fig. 1) consists of an upper tubular tract 1 pinned to the top metal 2, the connecting pipe 3 is attached to the top of the protective plate 4, channel 5, formed graphite clutch 6, and the lower tract, consisting of the support plate 7 mounted on the Cup 8, mounted in the lower mepitel 10, mounted on the rack 11, which is installed in channel 5 for catching falling graphite chips, etc., (Fig. 2). Guide 12 (Fig. 3) consists of a body 13, the centering flange 14, the device 15 located in the upper part of the guide 12. The flange 14 is designed for mounting rail 12 on the upper end of the tubular tract 1, the device 15 for fixing the necessary equipment on the rail 12. The post-capture 16 (Fig. 4, 5) contains in the upper part of the fixture 17, 18 for engagement with a lifting mechanism, the flange 19 for connection with a device 15 of the guide 12, in the lower part of the system of levers 20, which are connected with devices 17, 18 rods 21, 22. The levers 20 contain Rethimno device 23 that is designed to mount hanger 24 (with the opportunity to freely detach). The rod-gripper 16 is designed for gripping and lifting of the protective plate 4 on the magnitude of the stroke of the temperature compensator. Suspension 24 (Fig. 4, 5, 6) consists of a rod 25. In the lower part of the rods 25 are hooks 26, intended to capture the upper protective plate 4, in the upper part of the frame 27 and ring 28 to implement the manipulation for them of the suspension 24. The suspension 24 is designed to hold the upper protective plate 4 in high pollogen 32 and the tabs 33. The adapter 29 is designed for mounting arm 34 on the rail 12 (Fig. 8). The arm 34 (Fig. 8) contains a mechanism 35 for vertical movement mechanism 36 horizontal movement mechanism 37 of the rotation of the segmental elements 38, 39 of the support pad 40, the device 41 in the upper part for connection of the arm 34 with lifting mechanism (figures not shown), the flange 42 to the mounting arm 34. The mechanism 35 vertical movement in the lower part includes a housing 43. The housing 43 is attached to the spindle 44. The spindle 44 is connected with the mechanism 37 through which the spindle 44 can rotate relative to the housing 43. On the spindle 44 secures the cylinder 45 with the fingers 46 so that the head 45 can rotate together with the spindle 44 by means of the mechanism 37 and to move freely in a horizontal plane relative to the spindle 44 by means of the lever 47 mechanism 36. The lever 47 is located in the lower part of the mechanism 36 is connected to the cylinder 45 so that the head 45 is free to rotate relative to the lever 47. In the housing 43 of the mechanism 35 is emitting unit of the remote monitor to monitor the installation process of segment elements 38, 39 (figures not shown). The arm 34 is designed to set pornoho liner 40 (Fig. 15, 16) contain holes 48 for mounting on the fingers 46, the holes 49 to fit on the spindle 44, the groove 50 to align with the tab 51 of the upper protective plate 4 and the groove 52 to align with the tab 53 of the graphite stack 6. Segment elements 38, 39 are pairwise different configuration and size.

Installation of segmental elements 38, 39 between the protective plate 4 and the graphite clutch 6 is executed after the dismantling of the technological channel in the following sequence. All works are lifting mechanism (figures not shown). In the channel 5 graphite 6 lower container interior space 10 from the counter 11 (Fig. 2) to lock the rack 11 in the first step of the channel 5. Then placed in the channel 5 guide 12 (Fig. 3), lowering it into the channel to lock the centering flange 14 at the upper end of the pipe tract 1. After that, through the cavity of the guide 12 is introduced into the channel 5 post-capture 16 (Fig. 4) attached to its flange 19 and the device 23 suspension 24 to the stop flange 19 at device 15 of the guide 12. Using a hoisting mechanism and devices 17, 18 move thrust 21, 22 of the rod-gripper 16 relative to each other, by means of which sets in motion a system of levers 20, when rasathi which produce the grip and under imaut frame 27 of the suspension 24 with the flange 19 of the rod-gripper 16, move the thrust of 25 per device 15 of the guide 12, remove the lower end of the rod 25 of the fixture 23, tighten the suspension for 24 ring 28 to lock the hooks 26 in the protective plate 4, are fixed to the frame 27 of the suspension 24 on the device 15 of the guide 12. Thus shall hold the upper protective plate 4 in the raised position (Fig. 6). Post-capture 16 is removed from engagement with the protective plate 4, causing the levers 20 by moving the rods 21, 22 relative to each other in the initial position, and remove the rod-gripper 16 of channel 5 (Fig. 6). If necessary, make the bore of the upper graphite block 6 and the suction graphite dust from the channel 5 through the normal means (figures not shown). The device 15 of the guide 12 installing the adapter 29 (Fig. 7) so that the slots 32 of the adapter 29 sat down on the device 15 of the guide 12 and is fixed in this position by the clamps 33. Segment element 38 mounted on the head 45 of the arm 34 so that the fingers 46 of the head 45 into the holes 48 segment element 38 and the spindle 44 of the mechanism 35 is seated in the bore 49 segment element 38. Then lower the head 45 with the segment element 38 to the desired value (Fig. 9) mechanism 35 vertical displacement the head 45 by means of the mechanism 37 of the rotation (Fig. 10, 11). Move the cylinder 45 with the segment element 38 along the spindle 44 in a horizontal plane, a lever mechanism 47 36 horizontal movement to the desired value (Fig. 12), while the spindle 44 is removed from holes 49 segment element 38. Lower segment element 38 (on the fingers 46 of the head 45) on the graphite block 6 mechanism 35 vertical movement so that the protrusion 53 of the graphite stack 6 into the notch 52 of segment element 38 (Fig. 13). Bring the fingers 46 of the head 45 of the holes 48 segment element 38 by moving the head 45 in a horizontal plane, a lever mechanism 47 36 horizontal movement along the spindle 44. Deploy a head 45 on the 90odriving the spindle 44 with the cylinder 45 mechanism 37. The necessary amount of movement of the segmental elements 38, 39 in the horizontal and vertical planes when they are installed between the protective plate 4 and the graphite clutch 6 is determined in process control tests, and they are constants of the manipulator 34. Remove the latch 54, the locking position of the arm 34 on the adapter 29, and remove the arm 34 of the channel 5. The arm 34 is ready to install the next segment of the element 38. Installation of the following segment e is but up. Proper installation of the segmental elements 38, 39 are controlled by the emitting unit of the remote monitor that is installed in the housing 43 of the arm 34. After installing all four radial elements 38, 39 manipulator 34 is extracted from channel 5, remove the adapter 29 from the device 15 of the guide 12, for this, remove the retainer 33, the locking position of the adapter 29 to the device 15. After that, through the cavity of the guide 12 is introduced into the channel 5 post-capture 16 to the stop flange 19 of the rod-gripper 16 in the guide device 15 12 lead engages the lever 20 with the protective plate 2 (as described above), produce the capture and retention of the protective plate 4 in the raised position. Deduce from under the plate 4 hooks 26 of the suspension 24, for this ring 28 is removed, the frame 27 of the suspension 24 from the device 15 of the guide 12 and move them to the flange 19 of the rod-gripper 16. Through the rod-gripper 16 lower protective plate 4 on a support insert 40 (Fig. 14). Lead levers 20 of the rod-gripper 16 to the initial transport position and remove the rod-gripper 16 with suspension 24 of channel 5. Then remove from channel 5 guide 12 and the container-trap 10 with the stand 11.

The proposed method allows to recover the persons recovery temperature compensator tract technological channel nuclear urbangraffito reactor, made in the form of a telescopic connection of the upper tubular tract and coupling sleeve mounted on the upper protective plate graphite reactor, which consists in the fact that at the end of the pipe tract fixed guide, which lowered the barbell grip with suspension, the protective plate is lifted by the rod-gripper on the magnitude of the stroke of the temperature compensator, fixed on the suspension, then the post-capture replace the optical drive in the gap formed between the upper protective plate and the graphite walls, consistently set segment elements bearing liner having a characteristic transverse dimension less than the diameter of the channel of masonry, to pair their side surfaces, and first of all establish the other segment items and then all the liners set the upper protective plate.

2. The method according to p. 1, characterized in that prior to lowering the rod capture channel graphite set container-trap.

3. The method according to p. 1, characterized in that before installing segmental elements produce boring annular groove in the upper end of the graphite block.

4. The method according to inongo monitor, fitted in the lower part of the manipulator.

 

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FIELD: nuclear power engineering.

SUBSTANCE: proposed containment has inner space accommodating condensing chamber, high-pressure chamber, cooling pond, and discharge pipe. It is also provided with condenser communicating with high-pressure chamber. Discharge pipe is component part of inner space that provides communication between high-pressure chamber and condensing chamber. Condenser may be mounted in high-pressure chamber with top end of discharge pipe disposed above condenser. Operating process of condenser in nuclear power plant is characterized in that nondensables are automatically discharged from above-condenser area.

EFFECT: enhanced safety in operating nuclear power plants.

13 cl, 1 dwg

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