CN202282168U - Auxiliary single-side little-boot-upper charging device for nuclear-fuel assembly - Google Patents
Auxiliary single-side little-boot-upper charging device for nuclear-fuel assembly Download PDFInfo
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- CN202282168U CN202282168U CN2011203888223U CN201120388822U CN202282168U CN 202282168 U CN202282168 U CN 202282168U CN 2011203888223 U CN2011203888223 U CN 2011203888223U CN 201120388822 U CN201120388822 U CN 201120388822U CN 202282168 U CN202282168 U CN 202282168U
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- fuel assembly
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- 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
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Abstract
The utility model belongs to the technical filed of pressurized-water reactor nuclear-power plant in-core fuel operation and concretely relates to an auxiliary single-side little-boot-upper charging device for a nuclear-fuel assembly. The auxiliary single-side little-boot-upper charging device comprises guide pins, supporting posts, a guide plate, a soleplate and hanging rings, wherein the guide pins are positioned on in-core lower grid-plate through-flow holes for fixing the position of a boot upper. The supporting posts are supported on an in-core lower grid-plate platform and are used for bearing the pressure when the boot upper works. The bottom of a deformation assembly slides to an in-core area to be placed along the guide plate. The soleplate as the welding surface of an integrated structure is used for fixing the whole boot upper. The hanging rings are used for connecting an external moving part, so that operating personnel can operate at a long distance. Through the auxiliary single-side little-boot-upper charging device for the nuclear-fuel assembly disclosed by the utility model, the fuel operation of an in-core narrow space is finished by occupying fewer empty positions, a guiding action is provided for the in-core placement of the fuel assembly, charging problems brought by various deformations of the fuel assembly are solved, and the charging time is further shortened.
Description
Technical field
The invention belongs to PWR nuclear power plant reactor fuel field operation, be specifically related to the monolateral little boots of a kind of nuclear fuel assembly and help the charging servicing unit.
Background technology
Third generation AFA-3G 17 * 17 type fuel assemblies are the reactor fuels in a kind of PWR nuclear power plant; Form by skeleton and 264 fuel rods, skeleton by 245 guide pipes, 1 gauge pipe, 8 layers of grid spacer, 3 stir and make muddy wing screen work between striding and upper and lower base is formed.Nuclear fuel assembly generally all will circulate at reactor core in the phase in longevity and use for 3 times, and the irradiation distortion all can take place most of nuclear fuel assembly, and in height elongation to some extent can bend or reverse in shape, cause loading difficulty.
The fuel assembly distortion possibly cause assembly in place tommy on the Turbogrid plates under reactor core can not get into the dowel hole of assembly bottom nozzle.Among Fig. 1, Fig. 2, because assembly A flexural deformation, or adjacent component existence distortion, cause the bottom nozzle of assembly A to depart from the tram, and withstood by the tommy on the Turbogrid plates under the reactor core, can not be in place safely.Load the problem of difficulty during for the fuel assembly installation after the solution distortion, adopt the bilateral little boots of a kind of nuclear fuel assembly as shown in Figure 3 to help the charging servicing unit more in the world.Bilateral little boots group has 4 guiding surfaces, can guide effect be provided in that reactor core is in place for fuel assembly; Have 2 ropes, operating personnel can come it is carried out moving under water at a distance through rope.Bilateral little boots helper tool is placed under the reactor core on the Turbogrid plates behind the assigned address; The fuel assembly bottom nozzle is under the guiding of one group of spigot surface of instrument; Slide into down scheduled unit on the Turbogrid plates, guaranteed that time Turbogrid plates tommy accurately gets into fuel assembly bottom nozzle dowel hole.
But bilateral little boots help the charging aid must occupy three reactor core unit, and it generally cooperates deflection method charging (Fig. 3), straight cutting method charging (Fig. 4) to use, and utilize boots group guiding can accomplish the reactor fuel loading smoothly under the situation that the early stage of feeding, satisfied in the reactor core space.But the charging later stage must take the assembly in place room of three assemblies on every side when helping to use owing to bilateral boots, when the core bottom remaining space is narrow and small, can not continue to use again.Although the existing trihedral of remaining fuel assembly when filling with substance becomes constraint, transfer the distortion situation of assembly and be unable to estimate,, reactor core three faces still might be partial to no constraint direction after being adjacent to, load thereby can't accomplish assembly smoothly.
Summary of the invention
The technical matters that the present invention will solve provides the monolateral little boots of a kind of nuclear fuel assembly group charging servicing unit, for fuel assembly provides guide effect in that reactor core is in place, takies less room when using simultaneously, accomplishes the fuel handling of reactor core narrow space.
To achieve these goals; Technical scheme of the present invention is that a kind of monolateral little boots are helped the charging servicing unit; Comprise guide finger, pillar, guide plate, base plate and suspension ring; Wherein: being fixedly connected two cylindrical guide pin that are arranged side by side at the lower surface of base plate, is conical structure at each guide finger away from the end of base plate; On four angles of lower surface of base plate, be respectively equipped with a pillar; On base plate, be provided with guide plate, guide plate has two guiding surfaces, and profile top is circular-arc, and the section both sides are two outward-dipping straight lines; Upper surface at base plate is provided with two through holes, and via bottoms is fixedly connected two suspension ring.
Further, aforesaid a kind of monolateral little boots are helped the charging servicing unit, and the horizontal direction of guide plate and base plate is the four sides symmetrical structure.
Further, aforesaid a kind of monolateral little boots are helped the charging servicing unit, and angle is 40 ° between two guiding surfaces of guide plate.
The monolateral little boots of a kind of nuclear fuel assembly of the present invention only need take the position of the assembly in assembly in place limit when helping charging servicing unit assembly guiding, in practical application, through the lanyard suspension ring; Help integral body to transfer in boots to reactor core; And make the accurate contraposition of water delivering orifice on the Turbogrid plates under two guide fingers and the reactor core, after boots group is in place, utilize shore supports under reactor core on the Turbogrid plates; And utilize the guide plate side to contact, thereby play guide effect with the fuel assembly bottom nozzle.Under charging later stage bilateral boots group situation about can't use, can normally use monolateral little boots group, not only thoroughly solve the charging problem that the various distortion of fuel assembly bring, and do not taken the critical path of charging, further shortened the time of charging.
Description of drawings
Fig. 1 is fuel assembly bottom nozzle distortion situation synoptic diagram;
Fig. 2 is a fuel adjacent component bottom nozzle distortion situation synoptic diagram;
Fig. 3 is bilateral little boots helper tool and guidance mode synoptic diagram (deflection method charging) thereof;
Fig. 4 is bilateral little boots helper tool and guidance mode synoptic diagram (charging of straight cutting method) thereof;
Fig. 5 helps the front view of charging servicing unit for the monolateral little boots of a kind of nuclear fuel assembly of the present invention;
Fig. 6 is the left view of Fig. 5;
Fig. 7 is the vertical view of Fig. 5;
Fig. 8 helps the guidance mode synoptic diagram of charging servicing unit for the monolateral little boots of a kind of nuclear fuel assembly of the present invention;
Among the figure, 1-fuel assembly in place, the monolateral little boots of 2-are helped rope, and the monolateral little boots of 3-are helped guiding surface, 4-residue reactor core zone; 5-treats fuel assembly in place, and the monolateral little boots of 6-are helped 7-guide finger, 8-pillar; The 9-guide plate, the 10-base plate, the 11-suspension ring, the monolateral little boots of 12-are helped the charging servicing unit.
Embodiment
Combine accompanying drawing to help the embodiment of charging servicing unit to do further detailed explanation to the monolateral little boots of a kind of nuclear fuel assembly of the present invention at present.
Like Fig. 5, Fig. 6 and shown in Figure 7; The monolateral little boots of a kind of nuclear fuel assembly of the present invention help the charging servicing unit to comprise guide finger 7, pillar 8, guide plate 9, base plate 10 and suspension ring 11; Wherein: in two main bodys that are arranged side by side of the lower surface of base plate 10 welding is columniform guide finger 7, is conical structure at each guide finger 7 away from the end of base plate 10; On four angles of lower surface of base plate 10, be welded with a pillar 8 respectively; On base plate 10, be welded with guide plate 9, guide plate 9 has two guiding surfaces, and profile top is circular-arc, and the section both sides are two outward-dipping straight lines; Two suspension ring 11 of via bottoms welding that on the upper surface of base plate 10, are provided with.Further, the horizontal direction of guide plate 9 and base plate 10 is the four sides symmetrical structure; Angle is 40 ° between two guiding surfaces of guide plate 9.
12 need of nuclear fuel assembly monolateral little boots group's charging servicing unit of when guiding take that among the residue reactor core zone 4 position of an assembly on fuel assembly in place 1 limit.Monolateral little boots group charging servicing unit 12 is welded to connect and is formed by two guide fingers 7, four pillars 8, a slice guide plate 9, base plate 10 and two suspension ring 11 5 parts.Wherein guide finger 7 is positioned under the reactor core on the Turbogrid plates through flow hole, is used for fixing the position of boots group at reactor core.Pillar 8 is supported under the reactor core on the Turbogrid plates platform, is used to support the pressure that is born when the boots helper does.Guide plate 9 is used for the guiding of assembly before in place, the deformed component bottom is slided to along guide plate treat reactor core in place zone 5.Base plate 10 is the face of weld of structure as a whole, is used for fixing whole boots and helps.Suspension ring 11 are used to connect the external moving parts, and boots are helped and connected two ropes, and operating personnel can remote-controlled operation.
In the on-the-spot charging process, as shown in Figure 8, can carry out according to the following steps:
1, confirm the no fuel assembly in below after, operating personnel operates will the be monolateral little boots of rope group and slowly put into and treat reactor core in place zone on service bridge, stop to move service bridge during near zone undetermined, finely tune rope with two arms, release behind the aligning.
2, based on fuel assembly " loaded " position is placed monolateral little boots and is helped reactor core unit assigned address, confirms the guiding correct position, and whether inspection boots group puts well, and the root rope is moved on one side.
3, control the guide finger insertion reactor core discharge orifice that monolateral little boots are helped, the guide finger that conehead is 50 ° can guarantee smoothly not have bite during insertion; Insert the back and support, guarantee that back in place little boots group is in horizontal service position by four pins;
4, place fuel assembly; When assembly drops near height in place; Because the angle of guide plate is 20 °, is significantly smaller than its self-locking angle, make the guide plate inclined-plane with can make fuel assembly to lower slider after the fuel assembly bottom nozzle contacts; Reactor core in place zone is treated in entering, thereby avoids self-locking takes place and block.
5, treat that fuel assembly is in place after, will the be monolateral little boots of operation rope are helped to move to the next position, repeat the charging process that above step is accomplished next fuel assembly.
Claims (3)
1. the monolateral little boots of nuclear fuel assembly are helped the charging servicing unit; It is characterized in that: comprise guide finger (7), pillar (8), guide plate (9), base plate (10) and suspension ring (11); Being fixedly connected two main bodys that are arranged side by side at the lower surface of base plate (10) is columniform guide finger (7), is conical structure at each guide finger (7) away from the end of base plate (10); On four angles of lower surface of base plate (10), be respectively equipped with a pillar (8); On base plate (10), be provided with guide plate (9), guide plate (9) has two guiding surfaces, and profile top is circular-arc, and the section both sides are two outward-dipping straight lines; Upper surface at base plate (10) is provided with two through holes, and via bottoms is fixedly connected two suspension ring (11).
2. the monolateral little boots of a kind of nuclear fuel assembly according to claim 1 are helped the charging servicing unit, it is characterized in that: the horizontal direction of guide plate (9) and base plate (10) is the four sides symmetrical structure.
3. the monolateral little boots of a kind of nuclear fuel assembly according to claim 1 are helped the charging servicing unit, and it is characterized in that: angle is 40 ° between two guiding surfaces of guide plate (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203888223U CN202282168U (en) | 2011-10-13 | 2011-10-13 | Auxiliary single-side little-boot-upper charging device for nuclear-fuel assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203888223U CN202282168U (en) | 2011-10-13 | 2011-10-13 | Auxiliary single-side little-boot-upper charging device for nuclear-fuel assembly |
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| Publication Number | Publication Date |
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| CN202282168U true CN202282168U (en) | 2012-06-20 |
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| CN2011203888223U Expired - Lifetime CN202282168U (en) | 2011-10-13 | 2011-10-13 | Auxiliary single-side little-boot-upper charging device for nuclear-fuel assembly |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106653123A (en) * | 2015-11-02 | 2017-05-10 | 中科华核电技术研究院有限公司 | Refuelling method used for overland miniature reactor and refuelling apparatus |
| CN106653124A (en) * | 2015-11-02 | 2017-05-10 | 中科华核电技术研究院有限公司 | Replacing method and replacing device for land-based small reactor |
| CN106910543A (en) * | 2017-03-30 | 2017-06-30 | 上海核工程研究设计院 | A kind of PWR nuclear power plant fuel assembly contained side type loads steering tool |
| CN106910540A (en) * | 2017-03-30 | 2017-06-30 | 上海核工程研究设计院 | A kind of PWR nuclear power plant fuel assembly plagiohedral loads steering tool |
-
2011
- 2011-10-13 CN CN2011203888223U patent/CN202282168U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106653123A (en) * | 2015-11-02 | 2017-05-10 | 中科华核电技术研究院有限公司 | Refuelling method used for overland miniature reactor and refuelling apparatus |
| CN106653124A (en) * | 2015-11-02 | 2017-05-10 | 中科华核电技术研究院有限公司 | Replacing method and replacing device for land-based small reactor |
| CN106653123B (en) * | 2015-11-02 | 2019-01-22 | 中广核研究院有限公司 | A kind of material-changing method and material-changing device for land Small reactor |
| CN106910543A (en) * | 2017-03-30 | 2017-06-30 | 上海核工程研究设计院 | A kind of PWR nuclear power plant fuel assembly contained side type loads steering tool |
| CN106910540A (en) * | 2017-03-30 | 2017-06-30 | 上海核工程研究设计院 | A kind of PWR nuclear power plant fuel assembly plagiohedral loads steering tool |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120620 |