CN106098113B - A kind of presurized water reactor reactor pressure vessel upper cover - Google Patents
A kind of presurized water reactor reactor pressure vessel upper cover Download PDFInfo
- Publication number
- CN106098113B CN106098113B CN201610607725.6A CN201610607725A CN106098113B CN 106098113 B CN106098113 B CN 106098113B CN 201610607725 A CN201610607725 A CN 201610607725A CN 106098113 B CN106098113 B CN 106098113B
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- CN
- China
- Prior art keywords
- upper cover
- section
- changeover portion
- pressure vessel
- segment
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Classifications
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C13/00—Pressure vessels; Containment vessels; Containment in general
- G21C13/02—Details
- G21C13/06—Sealing-plugs
- G21C13/073—Closures for reactor-vessels, e.g. rotatable
-
- 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
Abstract
The invention belongs to nuclear reactor pressure container part field.To solve the problems such as welding difficulty existing for existing presurized water reactor reactor pressure vessel upper cover is big, the invention provides a kind of presurized water reactor reactor pressure vessel upper cover.The presurized water reactor reactor pressure vessel upper cover uses axially symmetric structure, including segment section, changeover portion and flange section；The segment section is provided with CRDM drive seat penetration piece perforate；Connected between segment section and flange section by the changeover portion.The present invention greatly reduces the sealing weldering welding difficulty between CRDM drive seat penetration piece and upper cover, it is ensured that welding quality；Make it that upper cover top shield effectiveness and stressing conditions are greatly improved in the case of a small amount of weightening, effectively increase upper cover integral rigidity.
Description
Technical field
The invention belongs to nuclear reactor pressure container part field, more particularly to a kind of presurized water reactor reactor pressure vessel
Upper cover.
Background technology
Presurized water reactor reactor pressure vessel is used to fix and contains reactor core and in-pile component, and by the fission reaction of nuclear fuel
It is limited in the space of a sealing, it is with steam generator, cooling medium pump and primary coolant circuit pipe etc. collectively forms reactor
The pressure boundary of cooling agent, it is one of successive barriers for preventing radioactive substance from escaping.
Presurized water reactor reactor pressure vessel housing is from top to bottom generally by upper cover, adapter cylinder, inlet and outlet adapter, reactor core
The weldering of the forging such as cylinder, changeover portion and low head group, it is formed by connecting, its inside surfacing austenitic stainless steel.Come for upper cover
Say, its design substantially there are three types.
The upper cover of early stage uses flat head, can play a part of flange simultaneously, and it has, and shield effectiveness is good, control rod
Drive mechanism drive seat penetration piece sealing weldering groove is symmetrical so that the advantages that welding deformation amount is easily controlled, referring to accompanying drawing 1.So
And because flat head stressing conditions itself are bad, cause design thickness and weight excessive, therefore later gradually by spherical upper cover
Substituted.
Spherical upper cover main body is hemisphere shell sape, and its edge is provided with flange, due to the limitation of technological level, spherical upper envelope
Originally head employs split-type structural, i.e., end socket top and flange are welded together after machine-shaping respectively, referring to accompanying drawing 2.Should
Manufacturing process is simple and easy, and the spherical upper cover stressing conditions of gained are preferable, lighter in weight.But due to a circular weld be present,
Therefore the security of upper cover is reduced, while adds the workload and staff's radiation absorbed dose of inservice inspection.
With the lifting of technological level, Split type spherical upper cover was substituted by integrated spherical upper cover later, referring to
Accompanying drawing 3.Integrated spherical upper cover is identical with Split type spherical upper cover in shape, but employs solid forging technique, takes
Disappeared circular weld, has preferable security, reduces the workload of inservice inspection.At present, China three generations nuclear power station is main
Designed using integrated spherical upper cover, such as three nuclear power stations, Haiyang Nuclear Power Stations.
The contrast of the characteristics of above-mentioned three types upper cover is listed in the table below：
However, no matter Split type spherical upper cover or integrated spherical upper cover still have problems with：Due to upper
Need to set one group of vertical CRDM drive seat penetration piece in the middle part of end socket, its perpendicularity requires very high, with footpath
Change to position, the angle of cut of each penetration piece and upper cover curved surface can change, therefore between upper cover and penetration piece
When carrying out sealing weldering, in addition to center, remaining weld seam will be multiple different on-plane surface space curves, when causing sealing weldering
Heat input is asymmetric, and welding difficulty is very big, the extremely difficult control of welding deformation amount.Spherical upper cover and the welding of penetration piece sealing weldering
Mode is referring to accompanying drawing 4.It was verified that the place easily leaked in reactor pressure vessel running, the overwhelming majority is
Appear in such welding position.
The content of the invention
To solve the problems such as welding difficulty existing for existing presurized water reactor reactor pressure vessel upper cover is big, the present invention provides
A kind of presurized water reactor reactor pressure vessel upper cover.
The presurized water reactor reactor pressure vessel upper cover uses axially symmetric structure, including segment section, changeover portion and flange section；
The segment curved surface of the segment section is upward, and plane is downward, and segment section is provided with CRDM drive seat penetration piece perforate；
The flange section uses circular flange；Connected between segment section and flange section by the changeover portion.
Designed by using ball-cut shape so that the sealing weldering between CRDM drive seat penetration piece and upper cover
Weld seam significantly reduces xenogenesis gold by the plane of multiple different on-plane surface space curve type Convert to Shape all sames
The welding deformation amount control difficulty of weldering is sealed between category, so as to preferably ensure that welding quality.At the same time, ball-cut shape design also makes
The more spherical upper cover of top thickness of upper cover is significantly increased, and its integral thickness and weight is well below flat head,
Stressing conditions also greatly improve compared with flat head, so as to obtain preferably top shield effectiveness with less cost.
Further, the inner surface of the changeover portion be sphere on annular surface, and changeover portion inner surface where ball
Spherical concentric of the face where with the segment curved surface of the segment section；It is connected above changeover portion inner surface with the plane of segment section,
And use arc transition；It is connected below changeover portion inner surface with flange section, and uses arc transition；The changeover portion outer surface
Formed by one section of the conical side surface coaxial with the segment curved surface, the side of the circular cone is tangent with the segment curved surface and is formed
One tangent circle, changeover portion outer surface are conical side surface part of the tangent circle to flange section upper surface；Outside changeover portion
Angle between surface and flange section uses arc transition.
The structure design of changeover portion " outer cone inner circle ", relative to wall thickness transition structure is waited, upper cover entirety can be effectively improved
Rigidity, reduce the axial separation amount of reactor pressure vessel sealing surface under various operating modes, be very beneficial for reducing sealing difficulty.
Further, the presurized water reactor reactor pressure vessel upper cover is manufactured using solid forging, no splicing welding joint.
Upper cover solid forging manufacture can substantially reduce inservice inspection workload, it is ensured that security, significantly reduce
The workload and staff's radiation absorbed dose of inservice inspection.
The presurized water reactor reactor pressure vessel upper cover of the present invention is by using segment-shaped structure and transition reasonable in design
Section, greatly reduce the sealing weldering welding difficulty between CRDM drive seat penetration piece and upper cover, it is ensured that weldering
Connect quality；Make it that upper cover top shield effectiveness and stressing conditions are greatly improved in the case of a small amount of weightening, effectively
Upper cover integral rigidity is improved, is advantageous to the sealing of reactor pressure vessel；Reduce with inservice inspection workload before using as a servant, can
Effectively reduce inspection personnel and operate dosage, the security of upper cover, which also obtain, to be obviously improved.
The presurized water reactor reactor pressure vessel upper cover of the present invention can be applied to various PWR nuclear power plants, be especially suitable for small
Type reactor nuclear power unit, such as ocean nuclear power platform, nuclear-powered icebreaker, naval vessels nuclear power.
Brief description of the drawings
Fig. 1 flat head formula upper cover sectional side elevations.
Fig. 2 Split type spherical upper cover sectional side elevations.
Fig. 3 integrated spherical upper cover sectional side elevations.
The spherical upper covers of Fig. 4 and CRDM drive seat penetration piece sealing weldering schematic diagram.
The presurized water reactor reactor pressure vessel upper cover sectional side elevation of Fig. 5 present invention.
The presurized water reactor reactor pressure vessel upper cover top view of Fig. 6 present invention.
The presurized water reactor reactor pressure vessel upper cover of Fig. 7 present invention seals with CRDM drive seat penetration piece
Weld schematic diagram.
Reference：1. CRDM drive seat penetration piece perforate, 2. segment sections, 3. changeover portions, 4. flange holes,
5. flange section, 6. upper covers, 7. stainless steels or nickel alloy cladding layer, 8. Ni-based separation layers, the driving of 9. CRDMs
Seat penetration piece, 10. plane weld seams, 11. on-plane surface space curve type weld seams.
Embodiment
Embodiments of the present invention are described further with reference to specific embodiment.
Embodiment
The presurized water reactor reactor pressure vessel upper cover of the present invention uses axially symmetric structure, including segment section 2, changeover portion 3
With flange section 5；The segment curved surface of the segment section 2 is upward, and plane is downward；The center of circle of circle is O where segment curved surface, and radius is
SR1；The plane of segment section 2 is circle, and its surface overlaying has stainless steel or nickel-base alloy, also can be as reactor pressure vessel
Reference data plane；Segment section 2 is provided with CRDM drive seat penetration piece perforate 1；The plane sizes of segment section 2 can
Determined according to the demand of the size of penetration piece opening area and welding operating space；The flange section 5 uses circular flange；Segment
Connected between section 2 and flange section 5 by the changeover portion 3；Flange hole 4 is provided with the flange section 5.
The inner surface of the changeover portion 3 be sphere on annular surface, and the inner surface of changeover portion 3 where sphere with it is described
Spherical concentric where the segment curved surface of segment section 2, the radius of the annular surface is SR2；The inner surface of changeover portion 3 top and ball
The plane for lacking section 2 is connected, and uses arc transition, arc radius SR4；It is connected below the inner surface of changeover portion 3 with flange section 5
Connect, and use arc transition, arc radius SR3；The outer surface of changeover portion 3 is by the circular cone side coaxial with the segment curved surface
One section of composition in face, the side of the circular cone is tangent with the segment curved surface and forms a tangent circle, and the outer surface of changeover portion 3 is
Conical side surface part for the tangent circle to the upper surface of flange section 5；Angle between the outer surface of changeover portion 3 and flange section 5 is adopted
With arc transition, arc radius SR5.
The presurized water reactor reactor pressure vessel upper cover can use solid forging to manufacture, no splicing welding joint.
Can between the presurized water reactor reactor pressure vessel upper cover and CRDM drive seat penetration piece 9 of the present invention
Sealing weldering is carried out to adopt the following technical scheme that：First, in the CRDM drive seat penetration piece perforate 1 of upper cover 6
Lower edge opens J-type groove；Next, being inserted and being positioned CRDM drive seat penetration piece 9 using cold charge, assembling terminates
After carry out dimensional gaughing；Then, the Ni-based separation layer 8 of built-up welding in groove, and carry out corresponding Non-Destructive Testing；Finally, according to design
It is required that complete welding.
Claims (3)
- A kind of 1. presurized water reactor reactor pressure vessel upper cover, using axially symmetric structure, it is characterised in that：The presurized water reactor reactor Pressure vessel upper cover includes segment section, changeover portion and flange section；The segment curved surface of the segment section is upward, and plane is downward, ball Lack section and be provided with CRDM drive seat penetration piece perforate；The flange section uses circular flange；Segment section and flange Connected between section by the changeover portion.
- 2. presurized water reactor reactor pressure vessel upper cover as claimed in claim 1, it is characterised in that：The interior table of the changeover portion Face is the annular surface on sphere, and sphere where changeover portion inner surface and the sphere where the segment curved surface of the segment section With one heart；It is connected above changeover portion inner surface with the plane of segment section, and uses arc transition；Changeover portion inner surface lower section and method Blue section is connected, and uses arc transition；The changeover portion outer surface is by the one of the conical side surface coaxial with the segment curved surface Section is formed, and the side of the circular cone is tangent with the segment curved surface and forms a tangent circle, and changeover portion outer surface is the phase The circle cut to flange section upper surface conical side surface part；Angle between changeover portion outer surface and flange section uses circular arc mistake Cross.
- 3. presurized water reactor reactor pressure vessel upper cover as claimed in claim 1 or 2, it is characterised in that：The presurized water reactor is anti- Core pressure vessel upper cover is answered to be manufactured using solid forging, no splicing welding joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610607725.6A CN106098113B (en) | 2016-07-28 | 2016-07-28 | A kind of presurized water reactor reactor pressure vessel upper cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610607725.6A CN106098113B (en) | 2016-07-28 | 2016-07-28 | A kind of presurized water reactor reactor pressure vessel upper cover |
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| Publication Number | Publication Date |
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| CN106098113A CN106098113A (en) | 2016-11-09 |
| CN106098113B true CN106098113B (en) | 2018-01-19 |
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| CN201610607725.6A Active CN106098113B (en) | 2016-07-28 | 2016-07-28 | A kind of presurized water reactor reactor pressure vessel upper cover |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU213678U1 (en) * | 2022-04-18 | 2022-09-21 | Российская Федерация, от имени которой выступает Государственная корпорация по атомной энергии "Росатом" Госкорпорация "Росатом" | DEVICE FOR SEALING THE JOINT BETWEEN THE HOUSING AND THE TOP PROTECTIVE COVERING OF THE NUCLEAR REACTOR |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106448755B (en) * | 2016-11-24 | 2018-07-20 | 中广核工程有限公司 | Nuclear reactor pressure container head cover and its installation method |
| CN108062985A (en) * | 2017-12-28 | 2018-05-22 | 中广核研究院有限公司 | For the pressure vessel of reactor |
| CN108257685A (en) * | 2017-12-28 | 2018-07-06 | 中广核研究院有限公司 | Reactor pressure vessel and its head cover and head cover end socket |
| CN109065190A (en) * | 2018-08-10 | 2018-12-21 | 中国核动力研究设计院 | A kind of reactor pressure vessel integral head cover with inner platform |
| CN109915677A (en) * | 2019-03-06 | 2019-06-21 | 中广核研究院有限公司 | A kind of steam generator and dual channel structure with corrugated pipe connection structure |
| CN110570956A (en) * | 2019-09-19 | 2019-12-13 | 哈尔滨工程大学 | Novel space reactor pressure vessel structure |
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| RU2043808C1 (en) * | 1992-04-14 | 1995-09-20 | Научно-исследовательский институт авиационной технологии и организации производства | Die set for end forming of parts from hollow blanks |
| DE4236005C2 (en) * | 1992-10-24 | 1994-08-25 | Bbc Reaktor Gmbh | Method for replacing a nozzle passing through a cover of a nuclear reactor pressure vessel |
| FR2700981B1 (en) * | 1993-01-29 | 1995-04-21 | Framatome Sa | Method and device for orbital welding of a cylindrical part on a curved wall. |
| FR2722326B1 (en) * | 1994-07-07 | 1996-09-27 | Framatome Sa | METHOD FOR REPLACING A CROSS-TUBE OF THE BOTTOM OF A NUCLEAR REACTOR COOLED WITH PRESSURIZED WATER |
| CN102179668B (en) * | 2011-03-14 | 2016-08-24 | 哈尔滨锅炉厂有限责任公司 | Boiler and pressure vessel pressing seal head and manufacture method |
| CN103862186A (en) * | 2012-12-13 | 2014-06-18 | 中国核动力研究设计院 | Welding structure for electric heating element sleeves of pressurized water reactor nuclear power plant voltage stabilizer |
| CN203397711U (en) * | 2013-08-12 | 2014-01-15 | 上海康晟特种合金有限公司 | Internal kettle device applicable to thorium-base molten salt reactor nuclear system |
| CN205881478U (en) * | 2016-07-28 | 2017-01-11 | 中国原子能科学研究院 | PWR reactor pressure vessel upper cover |
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2016
- 2016-07-28 CN CN201610607725.6A patent/CN106098113B/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU213678U1 (en) * | 2022-04-18 | 2022-09-21 | Российская Федерация, от имени которой выступает Государственная корпорация по атомной энергии "Росатом" Госкорпорация "Росатом" | DEVICE FOR SEALING THE JOINT BETWEEN THE HOUSING AND THE TOP PROTECTIVE COVERING OF THE NUCLEAR REACTOR |
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| Publication number | Publication date |
|---|---|
| CN106098113A (en) | 2016-11-09 |
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