FR2516694A1 - STORAGE DEVICE FOR FUEL BARS OF NUCLEAR REACTOR COMBUSTIBLE ELEMENTS - Google Patents

Abstract

STORAGE DEVICE FOR FUEL BARS OF NUCLEAR REACTOR FUEL ELEMENTS. THIS DEVICE INCLUDES, VERTICALLY ARRANGED ON A FLOOR SURFACE 3, A SUPPORT PILLAR 2 AND A QUIVER 8 OR 21, THE LATTER SERVING FOR THE HOUSING OF AT LEAST ONE FUEL BAR 13 AND BEING INTERPRETED TO PILLAR 2, DIRECTLY OR THROUGH ANOTHER ALSO VERTICAL QUIVER, BY MEANS OF REMOVABLE ASSEMBLY PARTS 17. OR STORAGE ADAPTABLE IN A FLEXIBLE WAY TO THE REAL NUMBER OF FUEL BARS AND INDEPENDENT OF THE LOCAL.

Description

Storage device For fuel rods

  of nuclear reactor fuel elements.

  The present invention relates to a storage device for fuel rods of nuclear reactor fuel elements. Such a storage device that is in use comprises a frame with suspended rails for trolleys to which fuel rods assembled into fuel elements skeletons of such dementies, are hung for storage purposes The storage chassis is permanently installed in a warehouse and must be established both for a given storage capacity in advance and for dimensions also determined in advance of nuclear reactor fuel elements to be stored If it happens that it does not present the expected quantity of fuel elements to be stored,

  the warehouse can not be used for other purposes.

  The invention relates to a storage device for fuel rods that can be assembled into nuclear reactor fuel elements that can be flexibly adapted to the actual number of bars to be stored and which are not

not related to the local.

  This storage device, already announced, is characterized in that it comprises, arranged vertically on a floor surface, a support pillar and a quiver, or tubular case, the latter serving for housing at least one bar of fueled and interlockingly connected to the support pillar, directly or via another carquo: vertically arranged on the ground surface, by means of

removable assemblies.

  The support pillar can be mounted vertically on the

  ground surface at any location in the warehouse.

  The quivers are then erected next to each other

  vertically on the soil surface and are connected

  penetration to the support pillar and to each other by means of the removable assembly parts. In this way, a large set of corners is obtained, supported firstly by the pillar provided for this purpose, but which, at the same time, acquires more and more stability specific to as it grows and guarantees mechanical storage of fuel rods in

the quivers.

  According to an advantageous embodiment of the invention, there is on the support pillar a horizontal arm to which a quiver is connected by interpenetration by means of a removable assembly part This allows to assemble directly to the support pillar, in interpenetration, not only a few quivers, but a whole row and thereby improve the stability of the set of quivers finally built. In this sense, it is also favorable that a support leg which stands on the surface of the ground is fixed to the horizontal arm. In particular, if this support foot is at the free end of the horizontal arm, not only is it avoided. bending of the horizontal arm under the effect of its own weight, but also improves stability, in particular at

  beginning of the building of the quiver set.

  The invention will be better understood from the description

  of an embodiment taken as a non-limiting example and schematically illustrated by the appended drawing, in which:

  FIG. 1 is a side elevational view of a device

  storage device according to said invention;

  Figure 2 is a top view of this device.

  The storage device according to FIGS. 1 and 2 comprises a support pillar 2 which, with a foot 2a, stands Vertical on a flat horizontal floor surface 3 This support pillar 2 has two horizontal arms 4 and 6 as well as two other horizontal arms 5 and 7 which form with the first a right angle A support foot 25 which stands on the ground surface

  3 is also attached to the free end of the arm 4.

  Between the arms 4 and 5 are arranged vertically elongated quivers 8 with a circular section These quivers 8 are closed at their lower end by buffers 9 by which they stand on the ground surface A Coxp S 10 shielding against radio-active radio-active 10 awu quiver E with a cylindrical shape erex and conporting on its upper and lower frontal surfaces of the lips 11 and 12 rests

  on the upper part 1 of each of said quivers 8.

  A fuel rod 13 containing nuclear fuel and placed vertically in the quiver 8 is supported laterally by bearing bodies 14 assembled

  between them by a bar 15 also arranged vertically.

  The casing bodies 10 of the quivers 8 rest on the arm 4 and / or 5; In addition, those belonging to quivers E neighbors to each other touch each other On the arms 4 and 5 are fixed to the contact locations of the shielding bodies 1 C of the tongues 16 with which the contact bodies 10, and pal

  quivers 8, are assembled in interpenetration

  with the aid of removable assembly parts which consist of clamps 17 and attack the lips 11 of the shielding bodies 10 and the tongues 16 Other removable clamps 17 which engage the lips 11 of the quiver shield bodies 10 neighbors mutually interpenetrate assemble these shielding bodies 10 and therefore the corresponding quiver 8 to see the lips 12 of the lower end of the

  armor 10 are also assembled together

  penetration in a similar manner by removable tongs 18.

  Another quiver 21 whose section is, alternatively, square stands vertically on the ground surface 3 between 1 (arm 5 and 6 of the support pillar 2 This quiver 21 is assembled interpenetration by two lateral surfaces respectively

  at the two arms 5 and 6 at the flange S 16 by means of a collector

vible 17.

  A stirrup 23 is disposed at the upper end of the carqu (21 as a holding device for the suspension of a nuclear reactor fuel element 24 This fuel element 2 comprises several fuel rods and a skeleton in which said fuel rods are maintained, it is placed on the stirrup 23 so as to hang inside the carquo: 21. If necessary, it can be further interlocked by means of clamps 17 of other quivers 8 or 21 which are set in a vertical position and are intended for fuel rods or

  nuclear reactor fuel elements.

Claims (7)

  1 Storage device for fuel rods of nuclear reactor fuel elements, characterized in that it comprises, arranged vertically on a ground surface (3), a support pillar (2) and a quiver (8 or 21 ), the latter serving to accommodate at least one fuel rod (13) and being interengaged with the support pillar (2), directly or via another quiver (8 or 21) also arranged vertically on the floor-surface (3), at   means of removable assembly parts (17) -.   2 Storage device according to claim 1, characterized in that it comprises on the support pillar (2) a horizontal arm (4, 6) to which a quiver (8 or 21) is connected in interpenetration by a piece of removable assembly (17).   Storage device according to claim 2, characterized   characterized by the fact that a support foot (25) which stands on   the floor surface (3) is fixed to the horizontal arm (4).   Storage device according to Claim 2, characterized in that an additional horizontal arm (5, 7) lying on the supporting pillar (2) forms an angle   right with the other arm (4,6) placed on the support pillar (2).   Storage device according to claim 1, characterized in that the quivers (8) have a section circular.   Storage device according to claim 1, characterized   characterized in that the quivers (21) have a square section.   Storage device according to claim 1, characterized   terized by the fact that it is on the quiver (21)   holding positive (23) for the suspension bars of   fuel in said quiver (21).   Storage device according to claim 1, characterized   terized by the fact that shielding bodies (10) against the   radioactive radiation are attached to the quiver 8.