• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    This invention relates to a pusher placed in a magazine for irradiated fuel elements which allows displacement thereof for the cutting operations. The pusher according to the invention allows the displacement of elements of small section in a magazine of large section. At the end of a cutting operation, the pusher applies its blank against the auxiliary holding clamp forming a continuous surface and the element is pushed by a blade, the body of the pusher being immobilized.
    公开号:SU1838836A3
    申请号:SU894613580
    申请日:1989-02-27
    公开日:1993-08-30
    发明作者:Grivo Rishar；Kerlo Daniel；Tyukula Daniel；Kola Zhan；Pelle Rober
    申请人:Cogema；
    IPC主号:
    专利说明:

    The invention relates to nuclear engineering, and more particularly to devices for the dismantling of nuclear fuel spent fuel assemblies (FAs) of nuclear reactors. . The aim of the invention is to increase the reliability of the device and its versatility by ensuring the cutting of fuel assemblies in the composition of the fuel assemblies of various cross sections in the same store.
    In Fig.1 and 2 depict known devices for cutting irradiated fuel elements in the fuel assembly; figure 3-9 - the proposed ·· device and the principle of its operation.
    Figures 1 and 2 show the final stage of cutting fuel assemblies having a cross section smaller than the cross section of the magazine used. The fuel assembly 1, containing the end part of the 2nd fuel element 3, is located in the store 4, the dimensions of which are designed for fuel assemblies of a larger size; The pusher 5 has dimensions agreed 1838836 AZ with the dimensions of the store and cut fuel assemblies. To cut the fuel assembly, it is placed horizontally with support on the lower part 6 of the magazine (see figure 1 - vertical projection) and on the wall 7 of the magazine (see figure 2 - top view) corresponding to the thrust surface of the knife (counter plate). The wall 7 is placed opposite the clamps (holders) 8 and 9. The fuel assemblies are pushed under the action of the pusher chain 10 .. When cutting the fuel rods, the main clamp 9 compresses the rods so that they are adjacent to each other, and the auxiliary clamp 8 supports the necessary (permissible) curvature fuel rods.
    When the final phase of cutting occurs, the auxiliary clamp 8 must be retracted to cut the fuel rods near the end piece 2. Due to the removal of the clamp 8, there is an empty space between the pusher 5, the fuel rods and the holder, where the fuel rods subjected to deformation during deformation can break and get stuck. The specified phenomenon is depicted in figure 2.
    In addition, as can be seen from Fig. 1, due to the mismatch in the transverse dimension of the fuel assembly and the magazine, favorable conditions arise for breaking the mvel near the end part 2 of the fuel assembly. When the clamp 9 is removed to move the fuel assembly forward (by the cutting step), the released (broken) fuel rods 11 can tip over and block the neck section through which the cut fuel fragments fall.
    The body of the pusher 12 (see Fig. 3 and 4) is a metal part in the form of a parallelepiped with a section almost equal to the section of the magazine 13 (with sliding). From the side of the lower large face 14, a cavity 15 is made. The section is practically equal to the section of the end part 2 of the fuel assembly (so that the cut fuel assembly passes into the cavity). The cavity 15 has a base 16 and is open on the front front surface 17 of the metal part (pusher) and on one of the side faces perpendicular to the face
    14. On the opposite side face, a recess 18 is made, open on the upper large face (opposite the named face 14) and on the front surface
    17. (This recess is made along the entire height of the part, and the height of the auxiliary clamp is approximately equal to the height of the pusher and magazine, while its length is at least equal to the size of the auxiliary clamp 8 horizontally). Clamp 8 is placed in the recess 18 in the final stages of cutting fuel assemblies (see Fig. 7-9).
    At the base 16 of the cavity 15 is a movable blade 19, which can be equipped with a grip. The drive device 20 consists of a pusher chain 21 and a telescopic piston 22. As a drive device, it is also possible to use a hydraulic cylinder, a screw-nut system, or other means.
    In the illustrated example, the drive device 20 also performs the function of the drive of the pusher, however, this design is not required. As a drive for a pusher and for a blade, for example, a hydraulic cylinder can be used.
    Due to the locking device (Fig. 5), the drive means 20 are connected to the shovel 19 in the pusher body 12. The lock can be placed both between the drive means and the pusher body, and between the blade and the pusher body (the latter is not shown). When the “lock” is in place, the entire pusher moves. When the lock is released, the drive means acts only on the blade, moving the fuel assembly, while the pusher body remains in place.
    The device operates as follows.
    When the magazine 13 is in place to perform cutting operations (figure 5-9 shows its side walls 23 and 24), then it abuts against the frame 25 of the scissors. On the frame there is a persistent surface of the knife (counter plate 26), to which the main clamp 9 receives the fuel rods 3. The counter plate 26 interacts with the cutting plate (knife) located in the immediate vicinity of the clamp 9 (the knife is not shown). Auxiliary clamp 8 is located in close proximity to the opening of the store.
    The pusher 12 is placed in the store so that the recess 18 is located at the side wall 24 of the store, corresponding to the clamps. The cavity 15 is located at the bottom wall of the store and its side wall 23, corresponding to the counter plate 26 (the thrust surface of the knife).
    By means of the locking means 27 of the blade 19 is rigidly connected to the pusher.
    The fuel assembly 1 is located in the store in a horizontal position, while the end piece 2 is in contact with the blade 19. The fuel assembly is moved forward by a predetermined distance (cutting step) by a single drive means 20. Between each movement of the fuel assembly the clamps 8 and 9 are slightly loosened (retracted), and then again activated before cutting the fuel rods 3.
    When the front surface 17 of the pusher reaches the auxiliary clamp 8, then by an automatic command (based on measuring the distance or due to the interaction of the clamp 8 with a thin flat part 28 of the pusher separating the cavity 15 and the Smoke 18. As shown in the figures), Clamp 8 moves back to a distance sufficient for the passage of the flat part 28 of the pusher. This ensures the holding of the fuel assembly when moving back the main clamp 9 and the exclusion of undesirable phenomena depicted in figure 2. At the same time, the importance of the relatively scarlet thickness of the p-flat part 28 of the pusher is necessary. To reduce the depression between the pusher and clamp 8 (see figure 6).
    After the front surface 17 of the pusher practically comes into contact with the main clamp 9 (Fig. 7), a command is issued to release the lock 27. the drive Means 20 is rigidly connected to the body of the pusher 12. After the Release of the lock, the pusher remains in place, and the drive means 20 acts only on the blade 19 to move the fuel assembly forward and complete its cutting.
    In the illustrated embodiment, the locking device 27 contains a horizontal movable rod 29 passing through the body of the pusher. One of the ends 30 of the said rod extends into the recess 18. and the other end 31 ends with an inclined surface. When the end 30 of the rod abuts against the clamp 8, the rod 29 moves. The inclined surface acts as a cam for the runner connected to the rod 32, which is installed almost perpendicular to the rod 29. · With its free end, the rod 32 enters the groove 33 made by 8 drive means 20 (see .ig. 7). When the rod 29 moves back, the rod 32 is lowered and exits the groove 33, after which the drive means 20 can freely move forward with the pusher stationary. Other blocking agents may also be used.
    After the completion of the last cut (Fig. 9), the pusher blade continues its movement and throws the end piece 2 of the fuel assembly out of the store. When moving backward, the blade 19 occupies its position in the body of the pusher, where its drive means are automatically locked.
    权利要求:
    Claims (2)
    [1]
    Claim
    1. Device for cutting irradiated fuel elements as part of a fuel assembly. containing a horizontal magazine in which the pusher is located, the largest cross-section of which is equal to the section of the cavity of the magazine, acting on the end part of the fuel assembly to move it in the magazine, the drive of the pusher from the side of its rear surface. a cutting plate interacting with the counter plate, the main and auxiliary clamps, pressing the fuel rods in the process of cutting to the side wall of the store corresponding to the counter plate, characterized in that, with the aim of increasing the reliability of the device and its versatility by ensuring the cutting of fuel rods in the composition of the fuel assemblies of various cross sections in the same store, in the pusher a cavity is made having a cross section equal to the cross section of the end part of the fuel assembly, and the span is open on the lower side wall of the store and on the front surface of the pusher, corresponding to the counter plate, a recess is made in the pusher, corresponding in size to the auxiliary clamp and open on the upper and opposite side plates of the store, as well as on the front surface of the pusher, while separating these cavity and the recess — the thin flat part of the pusher and the auxiliary clamp are made with the possibility of interaction, ensuring the latter enters the recess while maintaining using its pressing force when the front surface of the pusher reaches the auxiliary clamp, the pusher is additionally equipped with a movable blade located in the cavity and interacting with the end part of the fuel assembly, and the blade has an additional drive for moving the end part in the cavity and is rigidly connected to the pusher by a locking unit, which is made with the possibility of its release due to interaction with the auxiliary clamp entering the recess when the front surface reaches the push by eating the main clamp.
    [2]
    2. Device pop. 1, characterized in that the blocking unit of the blade is formed by a movable rod located in the pusher with the possibility of interaction with the auxiliary for entering the recess; the press, and the lock locking rod located in the pusher and mechanically connected with the movable rod.
    Figz
    FIG. b
    Fig.Z
    Compiled by N. Maslov Editor Tehred M. Morgenthal Corrector j S. Lisina
    Order 2926 Mintage. Subscription
    VNIIPI of the State Committee for Inventions and Discoveries under the State Committee for Science and Technology of the USSR 113035, Moscow, Zh-35, Raushskaya nab .. 4/5
    Production and Publishing Plant Patent; Uzhhorod, 101 Gagarin St.
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    同族专利:
    公开号 | 公开日
    GB2216329A|1989-10-04|
    CN1036657A|1989-10-25|
    FR2627891B1|1990-08-17|
    DE3905598A1|1989-09-21|
    CN1020017C|1993-03-03|
    GB2216329B|1991-09-11|
    US4968204A|1990-11-06|
    GB8904547D0|1989-04-12|
    JPH0210199A|1990-01-12|
    JP2544800B2|1996-10-16|
    FR2627891A1|1989-09-01|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    RU2650187C2|2016-07-25|2018-04-11|Акционерное Общество "Центральное Конструкторское Бюро Машиностроения"|Method for cutting a two-beam fuel assembly of a nuclear reactor and a device for its implementation|
    WO2019240614A1|2018-06-14|2019-12-19|Акционерное Общество "Российский Концерн По Производству Электрической И Тепловой Энергии На Атомных Станциях"|Method for dividing long elements of a nuclear reactor into fragments|US3722338A|1970-02-25|1973-03-27|Saint Gobain Tech Nouvellas|Apparatus and process for the treatment of spent fuel|
    US3807018A|1970-12-15|1974-04-30|Allied Chem|Apparatus for shearing spent nuclear fuel bundles|
    US3763770A|1970-12-15|1973-10-09|Allied Chem|Method for shearing spent nuclear fuel bundles|
    FR2324094B1|1975-09-11|1980-06-27|Saint Gobain Techn Nouvelles|
    FR2406868B1|1977-10-20|1982-01-22|British Nuclear Fuels Ltd|
    FR2527374B1|1982-05-18|1984-12-21|Commissariat Energie Atomique|
    DE3220802C1|1982-06-03|1983-08-11|Deutsche Gesellschaft für Wiederaufarbeitung von Kernbrennstoffen mbH, 3000 Hannover|Bundle shears in decentralized compact design|
    JPS62135997U|1986-02-20|1987-08-27|FR2711446B1|1993-10-19|1995-12-01|Cogema|Method and device for cutting by shearing elements of a nuclear installation.|
    ITFI20030115A1|2003-04-24|2004-10-25|Fabio Perini|DEVICE AND METHOD FOR HANDLING LOGS IN CUTTING MACHINES|
    ITUD20080097A1|2008-05-06|2009-11-07|Piegatrici Macch Elettr|FEEDING AND CUTTING EQUIPMENT FOR METAL BARS, AND ITS PROCEDURE|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FR8802498A|FR2627891B1|1988-02-29|1988-02-29|PUSH BUTTON FOR IRRADIATED COMBUSTIBLE ELEMENTS STORE|
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