WO2003019577A1 - Installation pour la mise en place d'assemblages de combustible nucleaire - Google Patents
Installation pour la mise en place d'assemblages de combustible nucleaire Download PDFInfo
- Publication number
- WO2003019577A1 WO2003019577A1 PCT/FR2002/002429 FR0202429W WO03019577A1 WO 2003019577 A1 WO2003019577 A1 WO 2003019577A1 FR 0202429 W FR0202429 W FR 0202429W WO 03019577 A1 WO03019577 A1 WO 03019577A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mast
- assembly
- assemblies
- installation
- plate
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C19/00—Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel
- G21C19/16—Articulated or telescopic chutes or tubes for connection to channels in the reactor core
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C19/00—Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel
- G21C19/20—Arrangements for introducing objects into the pressure vessel; Arrangements for handling objects within the pressure vessel; Arrangements for removing objects from the pressure vessel
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Definitions
- the invention relates to an installation for installing nuclear fuel assemblies within the vessel of a nuclear reactor.
- the vessel of a nuclear reactor comprises a set of assemblies of vertical fuel rods, placed side by side on a support plate called "core plate".
- This plate has a plurality of locations, square in shape, arranged side by side in a generally geometric shape that is essentially octagonal regular.
- This plate is traditionally equipped with a network of holes, called “water holes”, intended to allow the circulation of water along the assemblies.
- Each of the assemblies is positioned on a precise location on the heart plate which, for this purpose, has male studs cooperating with female holes placed correspondingly on the underside of the assembly.
- the assemblies are placed on the heart plate according to their degree of wear.
- the heart plate is divided into three zones.
- the new elements are placed on the periphery, the elements having undergone an operating cycle in the intermediate zone, and the most used elements in the center of the core, and all this in order to avoid creating a hot zone in the center of the reactor.
- the exhausted assemblies are removed for reprocessing and replaced by the assemblies coming from the intermediate zone.
- the assemblies removed from this intermediate zone are replaced by the assemblies coming from the periphery, which are replaced by new assemblies.
- the guidance tool used occupies a certain area at the level of the heart plate, so that it neutralizes part of the surface of the heart, and does not make it possible to serve the locations of the heart plate. located in this area, due to this neutralized area.
- the object of the invention is to overcome these various drawbacks.
- the invention consists in anchoring part of the management of the movement of the telescopic mast ensuring the handling of the assembly during its installation.
- the displacement of the guide tool and therefore of the base of the assembly parallel to the core plate is effected by the simple descent of the secondary mast, ensuring by means of mechanical members , and this after a first phase of positioning on the core plate, the translation of the base of the fuel assembly considered parallel to the plane of the core by means of said guide tool.
- FIG. 1 is a general view of the machine for loading an installation according to the invention
- Figure 2 is a diagram showing the main movements and connections between the various components of the invention.
- Figures 3 to 6 are schematic representations of the guide tool or part of the guide tool during its different actuation phases.
- the reference (1) designates the loading machine, which moves in known manner on a track (2).
- This machine (1) has two parallel rails (3, 4), on which a carriage (5) capable of moving horizontally carries the handling tool.
- This tool consists essentially of a winch (not shown), arranged in the machinery (6), and of a fixed tube (7) - and telescopic tubes (8) coaxial assembly.
- the end of the last telescopic tube (8) is equipped with gripping means (9), and in particular a grapple intended to be fixed to the upper end of a nuclear fuel assembly.
- the installation also comprises a second telescopic mast (10) called “secondary mast”, fixed parallel to the fixed tube (7) forming part of the main mast, by guide slides, by means of fasteners. fast (11, 12).
- This second mast is therefore integral with the main mast, but only moves therefrom in the vertical direction, that is to say during unfolding or folding of the coaxial tubes which constitute it.
- the lower telescopic end of the secondary mast (10) is provided with a guide tool (15) described below in more detail.
- FIG. 2 is a simplified schematic representation of the installation. It does not intend to represent precise shapes or exact dimensions of the various elements involved in the installation. Some parts have been enlarged to facilitate understanding.
- the core plate (20) as shown, comprises a grid of water holes (21) and centering pins (22). Each location (23) is intended to receive a fuel assembly (24).
- the installation comprises as main organs: the carriage (5), the main mast (7) equipped with a grapple (9), the secondary mast (10), a guide tool (15) composed of two parts , to know : . a base (27), fitted with pins for positioning on the heart plate, and a thrust bracket (30).
- the installation according to the invention is capable of being implemented in all types of pressurized water nuclear reactors, whether it is a power of 900 megawatts as of 1300, or even 1450 megawatts.
- the carriage (5) allows the movement of the main mast (7), the lower telescopic end of which grips the head (25) of the assembly (24) by the grapple (9). As a corollary, it allows the displacement of the secondary mast (10), fixed as already said, parallel to the main mast (7).
- the lower telescopic part of the secondary mast (10) is rigidly secured to the sole (29), receiving the thrust bracket (30) of the guide tool (15).
- This thrust bracket (30) is composed of two octagonal vertical planes, intended to push the adjacent vertical faces of the base of the assembly (24) at the desired location on the heart plate.
- the other part of the guide tool (15) is formed by the base (27). It has in the lower part two frustoconical studs, intended to penetrate into the water holes (21) in order to anchor the base (27) within the heart plate, and thus create a fixed point which serves as support during the movement phase of the assembly foot (24).
- the base (27) is mechanically connected to the thrust bracket (30), by a set of links, described below in more detail.
- the downward travel of the secondary mast (10) is shown more particularly which, by simple gravity, induces the actuation of the guide tool itself, and in particular of the thrust bracket (30).
- the bracket (30) is connected by means of articulated rods (40), respectively an upper rod connecting only the bracket and the vicinity of the lower end of the secondary mast (10), then a lower rod which is in fact consists of two rods, connecting on the one hand the lower end of the secondary mast (10) and the bracket, and on the other hand, the bracket and the base (27).
- a kind of scissors is thus formed, which, taking into account the articulation axes used, induce, when the secondary mast (10) descends, the lowering of the rods (40) and consequently the thrust of the bracket in a horizontal direction.
- the stroke of the bracket capable of being obtained as a function of course of the advancement of the connecting rods is of the order of 130 mm, that is to say, a distance largely sufficient to induce the thrust of the foot of nuclear fuel assembly at its location, taking into account the positioning of the main mast.
- the thrust of the base of the nuclear fuel assembly takes place completely independently of the movement of the head of said assembly.
- the main mast (7) remains fixed.
- the guide tool (15) ensures the positioning of the foot of said assembly at the level of its precise insertion. in the water holes (21).
- the installation according to the invention therefore makes it possible to ensure precise guiding of the base of the assemblies by taking the heart plate as a reference, so that it is quite possible to handle assemblies even having undergone relatively large deformations .
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR01/11020 | 2001-08-23 | ||
FR0111020A FR2828954B1 (fr) | 2001-08-23 | 2001-08-23 | Installation pour la mise en place d'assemblages de combustible nucleaire |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003019577A1 true WO2003019577A1 (fr) | 2003-03-06 |
Family
ID=8866674
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2002/002429 WO2003019577A1 (fr) | 2001-08-23 | 2002-07-10 | Installation pour la mise en place d'assemblages de combustible nucleaire |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR2828954B1 (fr) |
WO (1) | WO2003019577A1 (fr) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1464967A1 (de) * | 1963-09-17 | 1970-08-20 | Gulf General Atomic Inc | Kernreaktor |
FR2184488A1 (fr) * | 1972-05-18 | 1973-12-28 | Commissariat Energie Atomique | |
EP0220117A1 (fr) * | 1985-10-11 | 1987-04-29 | Framatome | Machine de manutention d'assemblage combustible nucléaire et procédé de chargement de réacteur en comportant application |
FR2614128A1 (fr) * | 1987-04-15 | 1988-10-21 | Electricite De France | Outil d'aide au chargement des assemblages combustibles d'un reacteur nucleaire a eau pressurisee 1300 mw |
EP0696806A1 (fr) * | 1994-08-12 | 1996-02-14 | Reel S.A. | Installation pour la mise en place d'assemblages de combustible nucléaire |
-
2001
- 2001-08-23 FR FR0111020A patent/FR2828954B1/fr not_active Expired - Lifetime
-
2002
- 2002-07-10 WO PCT/FR2002/002429 patent/WO2003019577A1/fr not_active Application Discontinuation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1464967A1 (de) * | 1963-09-17 | 1970-08-20 | Gulf General Atomic Inc | Kernreaktor |
FR2184488A1 (fr) * | 1972-05-18 | 1973-12-28 | Commissariat Energie Atomique | |
EP0220117A1 (fr) * | 1985-10-11 | 1987-04-29 | Framatome | Machine de manutention d'assemblage combustible nucléaire et procédé de chargement de réacteur en comportant application |
FR2614128A1 (fr) * | 1987-04-15 | 1988-10-21 | Electricite De France | Outil d'aide au chargement des assemblages combustibles d'un reacteur nucleaire a eau pressurisee 1300 mw |
EP0696806A1 (fr) * | 1994-08-12 | 1996-02-14 | Reel S.A. | Installation pour la mise en place d'assemblages de combustible nucléaire |
Also Published As
Publication number | Publication date |
---|---|
FR2828954B1 (fr) | 2004-07-23 |
FR2828954A1 (fr) | 2003-02-28 |
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