CN204303364U - A kind of cask for fast reactor mox fuel assembly - Google Patents
A kind of cask for fast reactor mox fuel assembly Download PDFInfo
- Publication number
- CN204303364U CN204303364U CN201420832123.7U CN201420832123U CN204303364U CN 204303364 U CN204303364 U CN 204303364U CN 201420832123 U CN201420832123 U CN 201420832123U CN 204303364 U CN204303364 U CN 204303364U
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- CN
- China
- Prior art keywords
- cask
- fuel assembly
- assembly
- cylinder
- mox fuel
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Abstract
The utility model relates to the cask of fuel assembly, is specifically related to a kind of cask for fast reactor mox fuel assembly.Its structure comprises cylinder assembly, the middle penetration piece for holding fuel assembly is provided with in cylinder assembly, the end of cylinder assembly is provided with compression end cap, described cylinder assembly comprises inner core, middle cylinder and urceolus, described compression end cap is divided into two-layer, ground floor compresses end cap and is fixedly connected with the ground floor containing border forming radiomaterial with the inner core of described cylinder assembly, the second layer compresses end cap and is fixedly connected with the second layer containing border forming radiomaterial with the middle cylinder of described cylinder assembly, is provided with shield and thermofin between described middle cylinder and urceolus.This cask has good shielding, pardon, resiliency and thermal insulation, the requirement that energy satisfy regulatory transports radiomaterial, and in whole transportation, mox fuel assembly can remain on subcritical state.
Description
Technical field
The utility model relates to the cask of fuel assembly, is specifically related to a kind of cask for fast reactor mox fuel assembly.
Background technology
Have the country of fast stack operation to only have Russia in the world, only just have the transport of fuel assembly at the fast reactor run and enter to pile, the fuel of fast reactor has UO
2with MOX two kinds, wherein the radioactivity of mox fuel is comparatively strong, and the structure of its cask needs stronger function of shielding, simultaneously also will by " test of checking transport normal condition ability " and " test of checking shipping accident condition ability ".Muscovite fast reactor mox fuel assembly cask, exterior cross-section is rectangle, and the stress state of cylindrical shell is not as circular cylinder body.Because cask will stand the test of a series of severe emergency conditions; cask needs good surge capability; in Muscovite fast reactor mox fuel assembly cask; good snubber assembly is not had between fuel assembly and cask; fuel assembly is directly contained in the partition board hole in cask cylindrical shell, is unfavorable for protecting fuel assembly.Cask is originally in falling process, the structural member that outside cylindrical shell and end need rigidity poor, improve surge capability, and interior cylinder needs good rigidity, Reducing distortion amount, improve pardon, outside cylindrical shell and the end of Muscovite mox fuel assembly cask all do not have good deformation space, do not have good shock-absorbing capacity.Muscovite mox fuel assembly cask does not have thermofin, under baked wheaten cake emergency conditions, limited to the relief capabilities of accident.
Utility model content
The purpose of this utility model is the defect for existing in prior art, a kind of cask for fast reactor mox fuel assembly is provided, this cask has good shielding, pardon, resiliency and thermal insulation, the requirement that energy satisfy regulatory transports radiomaterial, in whole transportation, mox fuel assembly can remain on subcritical state.
A kind of cask for fast reactor mox fuel assembly, comprise cylinder assembly, the middle penetration piece for holding fuel assembly is provided with in cylinder assembly, the end of cylinder assembly is provided with compression end cap, wherein, described cylinder assembly comprises inner core, middle cylinder and urceolus, described compression end cap is divided into two-layer, ground floor compresses end cap and is fixedly connected with the ground floor containing border forming radiomaterial with the inner core of described cylinder assembly, the second layer compresses end cap and is fixedly connected with the second layer containing border forming radiomaterial with the middle cylinder of described cylinder assembly, shield and thermofin is provided with between described middle cylinder and urceolus.
Further, as above for the cask of fast reactor mox fuel assembly, wherein, also impact damper is provided with at the two ends of described cylinder assembly.
Further, as above for the cask of fast reactor mox fuel assembly, wherein, be welded and fixed by gusset between the adjacent cylindrical shell of described cylinder assembly, annular space between middle cylinder and urceolus is divided into multiple chamber by gusset, be provided with described shield in each chamber, described shield is coated with described thermofin.
Further, as above for the cask of fast reactor mox fuel assembly, wherein, described ground floor compresses end cap and comprises end cover, heat insulating mattress, cushion pad and all carry pad, described end cover is flange arrangement, described heat insulating mattress, cushion pad and all carry pad and be bolted on end cover.
Further, as above for the cask of fast reactor mox fuel assembly, wherein, described ground floor compresses between end cap and the inner core of described cylinder assembly and is provided with asbestos-packing gasket; The described second layer compresses between end cap and the middle cylinder of described cylinder assembly and is provided with asbestos-packing gasket.
Further, as above for the cask of fast reactor mox fuel assembly, wherein, described middle penetration piece comprises multiple passage, and described passage is fixed on center-pole by web joint, and described web joint is also provided with many group damping sleeves.
Further, the xsect of described passage is sexangle, has four rhizospheres and is symmetrical arranged around center-pole; The axial direction of described many group damping sleeves centrally bar is arranged, and often group has four damping sleeves, is bolted on web joint.
Further, as above for the cask of fast reactor mox fuel assembly, wherein, described impact damper is the structure that cylinder with cone platform is connected, and is arranged on the two ends of cylinder assembly by bolt.
Further, as above for the cask of fast reactor mox fuel assembly, wherein, the heat transfer effect of described cylinder assembly is greater than urceolus wall thickness.
Further, as above for the cask of fast reactor mox fuel assembly, wherein, the urceolus of described cylinder assembly is provided with shelving support, the top of shelving support is provided with interlayer reference column, the bottom of shelving support is provided with longitudinal perforate, described interlayer reference column coordinate with longitudinal perforate be used for cask stacking transport; The top of shelving support is also provided with the lateral opening for cask lifting.
The beneficial effects of the utility model are: the cask for fast reactor mox fuel assembly described in the utility model, has good stress state, has certain shielding and pardon, the requirement that energy satisfy regulatory transports radiomaterial.There is good resiliency, make fuel assembly and cask all be subject to good protection.Have good heat-proof quality, in accident process, the shielding of cask and pardon are all within the scope of rules and regulations, and in whole transportation, mox fuel assembly can remain on subcritical state.
Accompanying drawing explanation
Fig. 1 is the structural representation for the cask of fast reactor mox fuel assembly described in the utility model embodiment;
Fig. 2 is the A-A diagrammatic cross-section of Fig. 1;
Fig. 3 is the cylinder assembly structural representation figure for the cask of fast reactor mox fuel assembly described in the utility model embodiment;
Fig. 4 is the B-B diagrammatic cross-section of Fig. 3;
Fig. 5 is the shield schematic diagram for the cask of fast reactor mox fuel assembly described in the utility model embodiment;
Fig. 6 compresses end cover structure schematic diagram for the ground floor of the cask of fast reactor mox fuel assembly described in the utility model embodiment;
Fig. 7 compresses end cover structure schematic diagram for the second layer of the cask of fast reactor mox fuel assembly described in the utility model embodiment;
Fig. 8 is the middle penetration piece structural representation for the cask of fast reactor mox fuel assembly described in the utility model embodiment;
Fig. 9 is the end face structure schematic diagram of middle penetration piece;
Figure 10 is the buffer structure schematic diagram for the cask of fast reactor mox fuel assembly described in the utility model embodiment.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in detail.
Fast reactor mox fuel assembly cask provided by the utility model comprises cylinder assembly, two-layer compression end cap, middle penetration piece and impact damper.
Cylinder assembly is circular profile structure, comprises inner core, middle cylinder and urceolus, and cylinder assembly comprises two-layer containing border, and wherein inner core and middle cylinder are for contain border, is shield and thermofin, is welded together between each cylindrical shell by gusset between middle cylinder and urceolus.Urceolus wall thickness is less, and rigidity is poor, and when accident, deformation space is large, and can play buffer action, inner core is the first containing border, and cylindrical shell thickness is comparatively large, and rigidity is better, contains better performances.After cask can stand the test of checking emergency conditions ability, its shielding can reach the requirement of rules and regulations, and reduces the destruction to environment as far as possible.
Compress on end cap and have cushion pad, for the buffering between fuel assembly and end cap.Compress on end cap simultaneously and be also provided with heat insulating mattress, for resisting baked wheaten cake accident.Cushion pad and heat insulating mattress are all fixed by bolts to and compress on end cap.
Cylinder assembly and two-layer compression end cap form double-deck containing system, sealed by asbestos-packing gasket between every layer of containing system, compression end cap to be fixed on cylinder assembly and press seal pad by bolt, wherein, ground floor compresses end cap and is connected with the end winding support of inner core, and the second layer compresses end cap and is connected with the end winding support of middle cylinder.
Middle penetration piece is hexagonal channels, and for holding fuel assembly, the relative tertiary location of fuel limitation assembly, prevents the generation of criticality safety accident.Cushion collar cartridge on middle penetration piece and rising between cylinder assembly cushions and positioning action, and under various traffic condition, all protect fuel assembly, the destruction that fuel assembly is subject to is as far as possible little.
Impact damper is the structure that cylinder with cone platform is connected.Impact damper bolt is arranged on the two ends of cylinder assembly, under normal transport and emergency conditions, plays buffer action.
Fast reactor mox fuel assembly cask tool provided by the utility model has the following advantages:
(1) profile of fast reactor mox fuel assembly cask and each layer cylindrical shell adopt circular configuration, and circular configuration has good stress state, convenient processing and manufacture;
(2) fast reactor mox fuel assembly cask outer cylinder body thinner thickness, have larger deformation space, resiliency is good.Cylindrical shell two ends are all provided with cylinder-conical impact damper, and shock-absorbing capacity is good;
(3) fuel assembly of fast reactor mox fuel assembly cask loads between passage and cylindrical shell and is provided with 4 groups of rubber bumpers, and fuel assembly is protected preferably;
(4) shielding of fast reactor mox fuel assembly cask comprises steel cylinder and tygon shield, and both can effectively shield photon and neutron, makes the dosage at the surface of cask and 1m place all be significantly less than the minimum limit value of laws and regulations requirement.The containing border of fast reactor mox fuel assembly cask, inner barrel and end cover all have good rigidity, and under accident conditions, the deflection containing border is less, has good pardon;
(5) fast reactor mox fuel assembly cask adopt alumina silicate fibre blanket and air layer dual heat insulation, under baked wheaten cake accident, the temperature of fuel assembly is far below limit value requirement.Shielding material also can not lose shield effectiveness;
(6) the middle penetration piece structure of fast reactor mox fuel assembly cask, make cask under the various emergency conditions of hypothesis, mox fuel can remain on subcritical state.
Embodiment
Fast reactor mox fuel assembly cask is used for the transport of China Experiment Fast Reactor mox fuel assembly, is transported to China Experiment Fast Reactor fresh fuel storehouse from mox fuel assembly manufacturing firm.Its structure is verified by calculation analysis and test, the requirement that energy satisfy regulatory is transported safely radiomaterial, under normal transport condition and accident traffic condition, and shielding, pardon, criticality safety, thermal insulation and resiliency all preferably.
As shown in Figure 1, fast reactor mox fuel assembly cask is made up of cylinder assembly 4, middle penetration piece 3, ground floor compresses end cap 2, the second layer compresses end cap 1 and two ends impact damper 5 etc.The in-built 4 box mox fuel assemblies of each cask.
The structure of cylinder assembly as shown in Figure 2, comprises inner core 8, middle cylinder 7, urceolus 6.Inner core material is 16MnD forging, and middle cylinder is welded by 16MnDR roll of steel plate and forms, and urceolus is welded by 16MnDR roll of steel plate and forms.Inner core and middle cylinder gusset weld.Middle cylinder and urceolus are also welded by gusset, and gusset will be divided into 8 chambers between middle cylinder and urceolus, as shown in Figure 4, each chamber has low pressure polyethylene Neutron shielding body 10, tygon is coated with the thermofin 9 that alumina silicate heat-barrier material is formed, and PE Processing becomes stairstepping, as shown in Figure 5.Make to leave Heat Insulation of Air Layer between heat-barrier material and tygon.
Thermofin is also equipped with in inner/outer tube end, is then welded by inner/outer tube by end cap.Urceolus is provided with shelving support 18, and as shown in Figure 2, frame upper is provided with interlayer reference column 19, and support bottom has longitudinal hole 20, and interlayer reference column 19 coordinates with longitudinal hole 20 to be convenient to cask stacking and to transport.Upper bracket also has transverse holes 21, for the lifting of cask.
The part on the ground floor border that inner core and middle cylinder contain respectively as radiomaterial and second layer border.
Fast reactor mox fuel assembly cask two ends are respectively equipped with compression end cap, compress end cap and are divided into ground floor to compress end cap 2 and second layer compression end cap 1.Ground floor compresses the structure of end cap as shown in Figure 6, comprises end cover 11, heat insulating mattress 12, cushion pad 13 and all carries pad 14.Heat insulating mattress 12, cushion pad 13 and all carry pad 14 and be fixed by bolts on end cover 11.The pin of mox fuel assembly and all carrying to pad and contact on mox fuel assembly cask lower end cap assembly, the operating head of mox fuel assembly and all carrying to pad and contact axial location on mox fuel assembly cask upper end cap assemblies.In transportation, pave buffer action by buffering.
End cover is a flange arrangement, and its material is 16MnD forging, and heat insulating mattress material is alumina silicate fibre, and cushion pad material is silicon rubber, and the material all carrying pad is teflon.Ground floor compresses between end cap and cylinder assembly has asbestos-packing gasket to seal, and two ends are respectively with being screwed on cylinder assembly.Ground floor compresses the ground floor border of end cap and the containing of cylinder assembly inner core formation radiomaterial.
The second layer compresses the structure of end cap as shown in Figure 7, and has asbestos-packing gasket to seal between cylinder assembly, is screwed on cylinder assembly.The second layer compresses cylinder in end cap and cylinder assembly and forms the second layer border of radiomaterial containing.
The structure of middle penetration piece as shown in Figure 8,9, comprises hexagonal channels 16, center-pole 17, web joint, damping sleeve 15.The main material of middle penetration piece is S30408 stainless steel.The two halves bolt of hexagonal channels 16 couples together, and every half part hexagonal channels corrosion resistant plate bends and forms, and is used for contain fuel assembly.Center-pole is the steel pipe of Ф 60 × 4mm.Hexagonal channels 16 and center-pole 17 are welded together by web joint, have four rhizospheres and are symmetrical arranged around center-pole.On middle penetration piece, centrally the axial direction of bar is provided with 4 groups of rubber shock-absorbing sleeves, and often group has 4 damping sleeves 15, is bolted on web joint.Middle penetration piece is located in cylinder assembly by the friction force of 4 groups of damping sleeves.
Fast reactor mox fuel assembly cask two ends are all provided with impact damper, and as shown in Figure 10, material is that 16MnR Plate Welding forms to the structure of impact damper, and its structure is the structure that cylinder with cone platform is connected, and is fixed on cylinder assembly by stud.When container is under fallen accident condition, play buffer action.
Obviously, those skilled in the art can carry out various change and modification to the utility model and not depart from spirit and scope of the present utility model.Like this, if belong within the scope of the utility model claim and equivalent technology thereof to these amendments of the present utility model and modification, then the utility model is also intended to comprise these change and modification.
Claims (10)
1. the cask for fast reactor mox fuel assembly, comprise cylinder assembly (4), the middle penetration piece (3) for holding fuel assembly is provided with in cylinder assembly (4), the end of cylinder assembly (4) is provided with compression end cap, it is characterized in that: described cylinder assembly (4) comprises inner core (8), middle cylinder (7) and urceolus (6), described compression end cap is divided into two-layer, ground floor compresses end cap (2) and is fixedly connected with the ground floor containing border forming radiomaterial with the inner core (8) of described cylinder assembly, the second layer compresses end cap (1) and is fixedly connected with the second layer containing border forming radiomaterial with the middle cylinder (7) of described cylinder assembly, shield (10) and thermofin (9) is provided with between described middle cylinder (7) and urceolus (6).
2., as claimed in claim 1 for the cask of fast reactor mox fuel assembly, it is characterized in that: be also provided with impact damper (5) at the two ends of described cylinder assembly (4).
3. as claimed in claim 1 or 2 for the cask of fast reactor mox fuel assembly, it is characterized in that: be welded and fixed by gusset between the adjacent cylindrical shell of described cylinder assembly (4), annular space between middle cylinder (7) and urceolus (6) is divided into multiple chamber by gusset, be provided with described shield (10) in each chamber, described shield (10) is coated with described thermofin (9).
4. as claimed in claim 1 for the cask of fast reactor mox fuel assembly, it is characterized in that: described ground floor compresses end cap (2) and comprises end cover (11), heat insulating mattress (12), cushion pad (13) and all carry pad (14), described end cover (11) is flange arrangement, described heat insulating mattress (12), cushion pad (13) and all carry pad (14) and be bolted on end cover (11).
5. the cask for fast reactor mox fuel assembly as described in claim 1 or 4, is characterized in that: described ground floor compresses between end cap (2) and the inner core (8) of described cylinder assembly and is provided with asbestos-packing gasket; The described second layer compresses between end cap (1) and the middle cylinder (7) of described cylinder assembly and is provided with asbestos-packing gasket.
6. as claimed in claim 1 for the cask of fast reactor mox fuel assembly, it is characterized in that: described middle penetration piece (3) comprises multiple passage (16), described passage (16) is fixed on center-pole (17) by web joint, and described web joint is also provided with many groups damping sleeve (15).
7., as claimed in claim 6 for the cask of fast reactor mox fuel assembly, it is characterized in that: the xsect of described passage (16) is sexangle, have four rhizospheres and be symmetrical arranged around center-pole (17); The axial direction of described many groups damping sleeve (15) centrally bar is arranged, and often group has four damping sleeves, is bolted on web joint.
8., as claimed in claim 2 for the cask of fast reactor mox fuel assembly, it is characterized in that: the structure that described impact damper (5) is connected for cylinder with cone platform, be arranged on the two ends of cylinder assembly (4) by bolt.
9., as claimed in claim 1 for the cask of fast reactor mox fuel assembly, it is characterized in that: the wall thickness of the inner core (8) of described cylinder assembly (4) is greater than the wall thickness of urceolus (6).
10. as claimed in claim 1 for the cask of fast reactor mox fuel assembly, it is characterized in that: the urceolus of described cylinder assembly (4) is provided with shelving support (18), the top of shelving support (18) is provided with interlayer reference column (19), the bottom of shelving support is provided with longitudinal perforate (20), and described interlayer reference column (19) coordinates with longitudinal perforate (20) transports for cask stacking; The top of shelving support (18) is also provided with the lateral opening (21) for cask lifting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420832123.7U CN204303364U (en) | 2014-12-24 | 2014-12-24 | A kind of cask for fast reactor mox fuel assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420832123.7U CN204303364U (en) | 2014-12-24 | 2014-12-24 | A kind of cask for fast reactor mox fuel assembly |
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| Publication Number | Publication Date |
|---|---|
| CN204303364U true CN204303364U (en) | 2015-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420832123.7U Withdrawn - After Issue CN204303364U (en) | 2014-12-24 | 2014-12-24 | A kind of cask for fast reactor mox fuel assembly |
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| CN (1) | CN204303364U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104575648A (en) * | 2014-12-24 | 2015-04-29 | 中国原子能科学研究院 | Conveying container for fast reactor MOX fuel component |
-
2014
- 2014-12-24 CN CN201420832123.7U patent/CN204303364U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104575648A (en) * | 2014-12-24 | 2015-04-29 | 中国原子能科学研究院 | Conveying container for fast reactor MOX fuel component |
| CN104575648B (en) * | 2014-12-24 | 2017-05-03 | 中国原子能科学研究院 | Conveying container for fast reactor MOX fuel component |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150429 Effective date of abandoning: 20170503 |