CN102522126A - Mounting process for metal reflective heat-insulation layers of pressure vessel of nuclear island - Google Patents
Mounting process for metal reflective heat-insulation layers of pressure vessel of nuclear island Download PDFInfo
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- CN102522126A CN102522126A CN2011104569677A CN201110456967A CN102522126A CN 102522126 A CN102522126 A CN 102522126A CN 2011104569677 A CN2011104569677 A CN 2011104569677A CN 201110456967 A CN201110456967 A CN 201110456967A CN 102522126 A CN102522126 A CN 102522126A
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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 invention aims to provide mounting process for a metal reflective heat-insulation layer of a pressure vessel of a nuclear island. By the aid of the mounting process, an integral hoisting process of heat-insulation layers can be omitted, difficulty in engineering quality control is reduced, heat-insulation layer mounting operation on the periphery of the pressure vessel when the pressure vessel is hung can be avoided, and safety risks of mounting of the heat-insulation layers are reduced. In order to realize the purposes, the mounting process for the metal reflective heat-insulation layers of the pressure vessel of the nuclear island is characterized in that the metal reflective heat-insulation layers are sequentially hoisted into a reactor cavity in a layering and blocking manner so as to be mounted on a wall of the reactor cavity of a reactor step by step, and the pressure vessel of the reactor is mounted on the wall; and after the pressure vessel of the reactor is mounted, the metal reflective heat-insulation layers of a nozzle and a bottom head are sequentially hoisted into the reactor cavity in a layering and blocking manner so as to be mounted on the peripheries of the nozzle and the bottom head of the pressure vessel of the reactor step by step.
Description
Technical field
The present invention relates to the technology of Nuclear Power Station, relate in particular to nuclear island primary device---reactor pressure vessel heat-insulation layer mounting process.
Background technology
Existing nuclear island of nuclear power station reactor pressure vessel cylindrical shell heat-insulation layer is installed and is mainly contained following dual mode.
One, after pressure vessel is just adorned completion, use crane that reactor pressure vessel is sling earlier, on the reactor pressure vessel outer wall,, heat-insulation layer is installed piecemeal then according to order from top to bottom.Heat-insulation layer must be installed after the reactor pressure vessel arrival, and pressure vessel is in the lifting stress for a long time when installing, and has long construction period, and there is big potential safety hazard in work progress, and Engineering Quality Control is than shortcomings such as complicacies.
Two, make a channel-section steel circle that is used for the assembly unit heat-insulation layer earlier, utilize the channel-section steel circle to assemble the heat-insulation layer abutment ring then, lift again on the stand, warming plate successively is installed then, thereby is precast heat-insulation layer.Before the pressure vessel hoisted in position, the heat-insulation layer that precasts is lifted up into the reactor chamber then, and be placed in the pressure vessel support.During the pressure vessel hoisted in position, pressure container cylinder is inserted in the prefabricated heat-insulation layer, and the heat-insulation layer support ring is connected with pressure vessel.Compare first kind of technology, second kind of technology shortened the later construction period of pressure vessel arrival effectively, reduced under the state that pressure vessel is sling the workload of on pressure vessel, installing.But second kind of technology still has certain shortcoming, heat-insulation layer diameter big (4464mm) at first, highly higher (7650mm), and the channel-section steel circle that supports heat-insulation layer is that bolt connects, warming plate is the self-plugging rivet riveted joint, causes the heat-insulation layer distortion during lifting easily; Secondly have only 100mm at heat-insulation layer to the distance of reactor cavity, during the heat-insulation layer integral hoisting, be easy to cause heat-insulation layer to touch surface, heap chamber, cause the heat-insulation layer damage; In addition, heat-insulation layer be operated in heap being connected of pressure container cylinder and carry out in the chamber, working space is narrow and small, difficulty of construction is bigger, and has potential safety hazard.
Summary of the invention
The object of the present invention is to provide a kind of nuclear island pressure vessel metallic reflection formula heat-insulation layer mounting process; The integral hoisting of its desirable XBWC; Reduce the difficulty of Engineering Quality Control; Also can avoid under the state that pressure vessel is hung, around it, carrying out the heat-insulation layer installation exercise, reduce the security risk that heat-insulation layer is installed.
For realizing said purpose nuclear island pressure vessel metallic reflection formula heat-insulation layer mounting process; Be characterized in; Comprise step 1); Before reactor pressure vessel is installed, the layering of metallic reflection formula heat-insulation layer, the piecemeal at the cylindrical shell position of pressure vessel hung in the heap chamber one by one, be installed in substep on the reactor cavity body of wall at reactor pressure vessel place; Step 2), after reactor pressure vessel is installed, the ozzle of pressure vessel and the layering of metallic reflection formula heat-insulation layer, the piecemeal at bottom (head) position are hung in the heap chamber one by one, to be installed in step by step around the ozzle and bottom (head) of reactor pressure vessel.
Described nuclear island pressure vessel metallic reflection formula heat-insulation layer mounting process; Its further characteristics are; Step 1) comprises: the composite steel bracket is installed to the reactor cavity body of wall in A, cylindrical shell position; Every layer of steel corbel installed ring-shaped steel bracket respectively then along an annular substep on the composite steel bracket of correspondence; And B, installation warming plate install the water conservancy diversion liner plate at the internal layer of warming plate then to the firm support of annular, and the water conservancy diversion liner plate is fixed on the ring-shaped steel bracket; Step 2) comprise C, bottom neutron shield thing steel bracket (before reactor pressure vessel is in place or after) and the support of bottom (head) steel are installed; Bottom neutron shield thing steel bracket is mounted on the body of wall steel corbel, and the bottom (head) steel supports and is mounted on the pre-embedded bolt or expansion bolt on ground; D, installation bottom neutron shield thing are to neutron shield thing steel bracket; Water conservancy diversion liner plate or warming plate to bottom (head) steel are installed are supported, every layer of water conservancy diversion liner plate or warming plate will be installed warming plate along an annular substep respectively at the water conservancy diversion liner plate skin of correspondence; And E, mounting pipe mouth portion insulation construction, comprise upper neutron shielding thing support, upper neutron shielding thing, ozzle warming plate and top warming plate are installed.
Described nuclear island pressure vessel metallic reflection formula heat-insulation layer mounting process, its further characteristics are, in steps A; Elder generation's spot welding fixedly steel corbel after the passed examination of affirmation installation site, is installed ring-shaped steel bracket to reactor cavity body of wall precalculated position to steel corbel in advance; After ring-shaped steel bracket installs in advance; Whether the distance of vertical outer edge to the pressure vessel center line of inspection ring-shaped steel bracket can meet design requirement in adjustable extent, if can satisfy, by steel corbel is carried out the full weld operation; If ring-shaped steel bracket can not satisfy in adjustable extent; Then to the steel corbel base plate jump a queue backing plate, repair a die, ring-shaped steel bracket carried out reaming; In order to revise ring-shaped steel bracket, ring-shaped steel bracket is met design requirement in adjustable extent, and then steel corbel is carried out the full weld operation; After treating all steel corbels all full weld finishing, formally ring-shaped steel bracket is adjusted, the distance of vertical outer edge to the pressure vessel center line of ring-shaped steel bracket is met design requirement, with bolt ring-shaped steel bracket is fixed on the steel corbel then.
Described nuclear island pressure vessel metallic reflection formula heat-insulation layer mounting process; Its further characteristics are; In step B, adopt the heat insulating block clearance measuring method: be mounted to all heat insulating blocks on the ring-shaped steel bracket earlier, on warming plate, select two points then; Measure the spacing between every adjacent two warming plates through these two points; Maximal clearance according between every adjacent two warming plates is no more than designing requirement adjustment, again according to the spacing between every adjacent two warming plates of said two point measurements, this spacing is met design requirement after the adjustment.
Described nuclear island pressure vessel metallic reflection formula heat-insulation layer mounting process, its further characteristics are, in step B; After the warming plate installation; Carry out the installation of water conservancy diversion liner plate, the water conservancy diversion liner plate is connected on the ring-shaped steel bracket with bolt, and is used for protecting warming plate.
Described nuclear island pressure vessel metallic reflection formula heat-insulation layer mounting process, its further characteristics are that in step C, bottom neutron shield thing support is installed to the body of wall steel corbel by elder generation, suitably adjusts to make it to meet design requirement, and tightens with bolt then; The bottom (head) steel is installed to be supported on pre-embedded bolt or the expansion bolt; The support ring that adjustment bottom (head) steel supports is apart from the absolute altitude on ground, if meet design requirement, tighting a bolt gets final product; If can not meet design requirement, need under the supporting leg that the bottom (head) steel supports, add backing plate and make it to meet design requirement.
Described nuclear island pressure vessel metallic reflection formula heat-insulation layer mounting process; Its further characteristics are in step D, neutron shield thing in bottom to be installed to bottom neutron shield thing steel bracket; According to on-site actual situations; Neutron shield things all except that corner part can move inward, the neutron shield thing at elder generation mount angle position during installation, but must guarantee the upper strata of all bottom neutron shield things and the gap between the body of wall of heap chamber; Lower floor's the first section of all bottom neutron shield things and the gap between the part of back meet design requirement; If can not meet the demands, need carry out reaming to the bolt hole of bottom neutron shield thing steel bracket, make it to meet the demands; Water conservancy diversion liner plate or warming plate to bottom (head) steel are installed are supported, promptly at first be installed into mouth of a river warming plate to bottom (head) steel and support, bottom (head) fair water fin to bottom (head) steel is installed is again supported, at the water conservancy diversion liner plate skin of correspondence the bottom (head) warming plate is installed respectively again.
Described nuclear island pressure vessel metallic reflection formula heat-insulation layer mounting process; Its further characteristics are; In step e; Install earlier on the steel corbel of upper neutron shielding thing support to the reactor cavity body of wall, the upper neutron shielding thing be installed again, guarantee between all upper neutron shielding things and the heap chamber body of wall the gap and and pressure vessel between the gap all meet design requirement; Ozzle root warming plate is installed then, is guaranteed that all warming plates install according to design attitude, mounting pipe mouth position steel supports again, and ozzle and top warming plate are installed at last.
The present invention is employed in before the pressure vessel installation; Through bracket heat-insulation layer is fixed on method on the reactor cavity body of wall; After reactor pressure vessel is installed; The layering of metallic reflection formula heat-insulation layer, the piecemeal at ozzle and bottom (head) position hung in the heap chamber one by one, be installed in around the ozzle and bottom (head) of reactor pressure vessel, solved the described prior art shortcoming of preamble like this with substep.At first, heat-insulation layer is directly installed on the reactor cavity body of wall, need not directly to be connected with the pressure vessel barrel, and all reactor pressure vessel cylindrical shell heat-insulation layer installment works were all carried out before pressure vessel is installed, and did not take the main line progress of Nuclear Power Station; Secondly heat-insulation layer layering, piecemeal hang in the heap chamber one by one, the risk of having avoided the lifting deformation effect installation accuracy that the heat-insulation layer integral hoisting exists during with lifting the heap cavity wall can collide the ruined risk of heat-insulation layer that heat-insulation layer causes; In addition, also be very important safety problem, the heat-insulation layer field engineering that the present invention adopted has been avoided around the pressure vessel that is played, carrying out construction operation, thereby greatly reduces the security risk of heat-insulation layer installation exercise.
Description of drawings
Fig. 1 is the process flow diagram of nuclear island pressure container cylinder metallic reflection formula heat-insulation layer mounting process.
Fig. 2 is the outside drawing according to the profile of the metallic reflection formula heat-insulation layer of nuclear island pressure container cylinder metallic reflection formula heat-insulation layer mounting process of the present invention.
Embodiment
Through an embodiment mounting process of the present invention is described below, should be noted in the discussion above that following embodiment is merely of the present invention and illustrates, but not limitation of the present invention.
Shown in Figure 2 is that nuclear island pressure vessel metallic reflection formula heat-insulation layer installs, and reactor pressure vessel reaches the diagrammatic cross-section that reactor core 100 wherein also installs.Heat-insulation layer 102 is installed in the reactor cavity 103, and the internal layer of heat-insulation layer 102 is made up of the stainless steel diversion liner plate, and skin is the stainless steel warming plate.Heat-insulation layer 102 around whole pressure vessel 101 and pressure vessel (RV) pipe arrangement ozzle 110 around forming.It is cylinder-shaped that heat-insulation layer is, and is antidetonation 2 kind equipments, non-nuclear safety relevant device.Heat-insulation layer 102 is metallic reflection formula heat-insulation layer.What Reference numeral 112 indicated among Fig. 2 is pore.
As shown in Figure 1, in step 1, set up suitable framing scaffold in reactor cavity (the CA04 module of AP1000 system) inside, utilize the absolute altitude line of reactor cavity metope and metope perpendicular line to emit steel corbel installation outline line.
In step 2, steel corbel and ring-shaped steel bracket are installed, steel corbel has multilayer; Each layer steel corbel be substep ringwise, and ring-shaped steel bracket is connected on corresponding one deck steel corbel, in one embodiment of this invention through bolt; Totally 8 layers of steel corbel and 6 layers of steel bracket; In other embodiments of the invention, can carry out number of plies adjustment, be not limited only to this according to actual conditions.
Utilize framing scaffold, with tightrope steel corbel is pulled to corresponding absolute altitude position, adjustment steel corbel position makes it to overlap with the outline line of reactor cavity metope, and first spot welding is fixed, and checks with tape measure again, after the passed examination of installation site, ring-shaped steel bracket is installed in advance.
After ring-shaped steel bracket installed in advance, whether the distance of vertical outer edge to the pressure vessel center line of inspection ring-shaped steel bracket can meet design requirement in adjustable extent.If can satisfy, steel corbel carried out the full weld operation by welding requirements.If ring-shaped steel bracket can not satisfy in adjustable extent; Then must to the steel corbel base plate jump a queue backing plate, repair a die, ring-shaped steel bracket carried out reaming etc. in order to revise ring-shaped steel bracket; Ring-shaped steel bracket is met the demands in adjustable extent, by welding requirements steel corbel is carried out the full weld operation then.After treating all steel corbels all full weld finishing, formally ring-shaped steel bracket is carried out adjustment in place, the distance of vertical outer edge to the pressure vessel center line of steel bracket is met design requirement, tight a bolt then, fix ring-shaped steel bracket.Additive methods such as the nose situation jack capable of using that occurs for ring-shaped steel bracket, lifting jack carry out cold sizing to it, to satisfy installation requirement.
In step 3, cylindrical shell warming plate (warming plate of corresponding pressure shell part) and water conservancy diversion liner plate are installed.
Before warming plate and water conservancy diversion liner plate are installed,, set up the clear area to once cleaning completely in the reactor cavity chamber.Installation requirements according to reality are transported to the reactor cavity chamber interior to warming plate.
Be transported to corresponding absolute altitude position to warming plate, be linked in sequence together, confirm the concrete measuring method in adjacent two heat insulating block gaps: the heat insulating block clearance measuring method: through surveying the gap that warming plate front end spacing substitutes the rear end warming plate.Be mounted to all heat insulating blocks on the ring-shaped steel bracket earlier; On warming plate, select two points then; Measure the spacing between every adjacent two warming plates through these two points, be no more than designing requirement adjustment according to the maximal clearance between every adjacent two warming plates, after the adjustment again according to the spacing between every adjacent two warming plates of said two point measurements; This spacing is met design requirement, and all warming plates that utilize spring shackle to connect do not need measurement clearance.
After the warming plate installation, carry out the installation of water conservancy diversion liner plate, the water conservancy diversion liner plate connects with bolt, makes it reach design load in every face wall body direction with the steel tape inspection and the distance of regulating water conservancy diversion liner plate to pressure vessel center line.Tighten all bolts after satisfying tolerance.
In step 4, bottom neutron shield thing steel bracket is installed
Be connected to 16 neutron screen steel bracket MKLNS2-B (MKLNS2-B is a product type) on 8 groups of neutron shield thing steel bracket MKLNS2-A (MKLNS2-A is a product type) with bolt.After the assembled; Winch to steel corbel (in step 2, installing) absolute altitude in place to one group of neutron shield thing assembly wherein with two groups of tightropes, regulate tightrope, make that each bolt hole of neutron shield thing assembly is corresponding one by one with the bolt hole of steel corbel; Tighten in advance with bolt, connect into integral body.
In the step 5; (MK310 is a product type with bottom (head) water conservancy diversion liner plate MK310 in order with additive methods such as tightrope, manual works; The water conservancy diversion liner plate of corresponding pressure container bottom end socket) is transported to corresponding position; Be connected to water conservancy diversion liner plate MK310 on the bolt hole of lower bolt hole and orlop steel corbel front end on the cylindrical shell orlop water conservancy diversion liner plate (being aforementioned mounted water conservancy diversion liner plate orlop) with bolt then, utilize bolt to fix again.
In step 6, after reactor pressure vessel is in place, the gap between pressure vessel and the water conservancy diversion liner plate is tested, for example wait other speciality tools with logical ball (Go Gage).
In step 7; Neutron shield thing in bottom is installed to bottom neutron shield thing steel bracket (being fixed on reactor cavity 103 bottoms); According to on-site actual situations; All neutron shield things can move inward (annotate: the neutron shield thing of corner part can not move), the neutron shield thing at elder generation mount angle position when every face wall body is installed, but must guarantee the upper strata of all bottom neutron shield things and the gap between the body of wall of heap chamber; Gap between lower floor's the first section (near the pressure vessel position) of all bottom neutron shield things and the back part (near heap body of wall position, chamber) meets design requirement; If can not meet the demands, need carry out reaming to the bolt hole of bottom neutron shield thing steel bracket, make it to meet the demands.
Water conservancy diversion liner plate or warming plate to bottom (head) steel are installed to be supported on (being fixed on reactor cavity 103 bottoms).At first be installed into mouth of a river warming plate to bottom (head) steel and support, will guarantee that in installation process the hook of spring shackle all connects, and will guarantee that the hinged door installation of water delivering orifice is suitable, and can freely open.Bottom (head) fair water fin to bottom (head) steel is installed is supported, guarantee that the gap meets design requirement to get final product, at the water conservancy diversion liner plate skin of correspondence the bottom (head) warming plate is installed respectively again, must guarantee that the hook of all spring shackles all connects.
In step 8; Upper neutron shielding thing support is installed earlier (to install in step 2 to steel corbel; Be positioned at the top of reactor cavity 103) on; The upper neutron shielding thing is installed again, is guaranteed that gap and the gap between the reactor pressure vessel between all upper neutron shielding things and the heap chamber body of wall all meets design requirement.Ozzle root warming plate is installed then to steel bracket, (is fixed on the body of wall respective tube mouth position of reactor cavity 103); Guarantee that all warming plates install according to design attitude; Mounting pipe mouth position steel supports to reactor cavity 103 bodies of wall again; Guarantee the spacing uniformity between all steel brackets, the supporting ozzle of last setting pressure container and installation top warming plate are to the steel bracket on the body of wall top of reactor cavity 103.
In step 9, all installment works should in time be removed construction rubbish after finishing, and the chamber interior clean room are thoroughly swept, to reach the requirement of C level cleanliness.
Claims (8)
1. nuclear island pressure vessel metallic reflection formula heat-insulation layer mounting process is characterized in that, comprises
Step 1) before reactor pressure vessel is installed, hangs in the heap chamber with the layering of metallic reflection formula heat-insulation layer, the piecemeal at the cylindrical shell position of pressure vessel one by one, is installed in substep on the reactor cavity body of wall at reactor pressure vessel place;
Step 2), after reactor pressure vessel is installed, the ozzle of pressure vessel and the layering of metallic reflection formula heat-insulation layer, the piecemeal at bottom (head) position are hung in the heap chamber one by one, to be installed in step by step around the ozzle and bottom (head) of reactor pressure vessel.
2. nuclear island pressure vessel metallic reflection formula heat-insulation layer mounting process as claimed in claim 1 is characterized in that step 1) comprises:
The composite steel bracket is installed to the reactor cavity body of wall in A, cylindrical shell position, and every layer of steel corbel installed ring-shaped steel bracket respectively then along an annular substep on the composite steel bracket of correspondence; And
B, installation warming plate are installed the water conservancy diversion liner plate at the internal layer of warming plate then to ring-shaped steel bracket, the water conservancy diversion liner plate is fixed on the ring-shaped steel bracket;
In step 1) and step 2) between also comprise: before reactor pressure vessel is in place or after installation bottom neutron shield thing steel bracket is installed;
Step 2) comprises
C, installation bottom (head) steel support, and bottom neutron shield thing steel bracket is mounted on the body of wall steel corbel, and the bottom (head) steel supports and is mounted on the pre-embedded bolt or expansion bolt on ground;
D, installation bottom neutron shield thing are to neutron shield thing steel bracket; Water conservancy diversion liner plate or warming plate to bottom (head) steel are installed are supported, every layer of water conservancy diversion liner plate or warming plate will be installed warming plate along an annular substep respectively at the water conservancy diversion liner plate skin of correspondence; And
E, mounting pipe mouth portion insulation construction comprise upper neutron shielding thing support, upper neutron shielding thing and top warming plate are installed.
3. nuclear island pressure vessel metallic reflection formula heat-insulation layer mounting process as claimed in claim 2; It is characterized in that, in steps A, first spot welding fixedly steel corbel to reactor cavity body of wall precalculated position; After confirming the installation site passed examination; Ring-shaped steel bracket is installed in advance to steel corbel, after ring-shaped steel bracket installed in advance, whether the distance of vertical outer edge to the pressure vessel center line of inspection ring-shaped steel bracket can meet design requirement in adjustable extent; If can satisfy, steel corbel is carried out the full weld operation; If ring-shaped steel bracket can not satisfy in adjustable extent; Then to the steel corbel base plate jump a queue backing plate, repair a die, ring-shaped steel bracket carried out reaming; In order to revise ring-shaped steel bracket, ring-shaped steel bracket is met design requirement in adjustable extent, and then steel corbel is carried out the full weld operation; After treating all steel corbels all full weld finishing, formally ring-shaped steel bracket is adjusted, the distance of vertical outer edge to the pressure vessel center line of ring-shaped steel bracket is met design requirement, with bolt ring-shaped steel bracket is fixed on the steel corbel then.
4. nuclear island pressure vessel metallic reflection formula heat-insulation layer mounting process as claimed in claim 2; It is characterized in that; In step B, adopt the heat insulating block clearance measuring method: be mounted to all heat insulating blocks on the ring-shaped steel bracket earlier, on warming plate, select two points then; Measure the spacing between every adjacent two warming plates through these two points; Maximal clearance according between every adjacent two warming plates is no more than designing requirement adjustment, again according to the spacing between every adjacent two warming plates of said two point measurements, this spacing is met design requirement after the adjustment.
5. nuclear island pressure vessel metallic reflection formula heat-insulation layer mounting process as claimed in claim 2 is characterized in that, in step B; After the warming plate installation; Carry out the installation of water conservancy diversion liner plate, the water conservancy diversion liner plate is connected on the ring-shaped steel bracket with bolt, and is used for protecting warming plate.
6. nuclear island pressure vessel metallic reflection formula heat-insulation layer mounting process as claimed in claim 2 is characterized in that, in step C, bottom neutron shield thing support is installed earlier to the body of wall steel corbel, and suitably adjustment makes it to meet design requirement, and tightens with bolt then; The bottom (head) steel is installed to be supported on pre-embedded bolt or the expansion bolt; The support ring that adjustment bottom (head) steel supports is apart from the absolute altitude on ground, if meet design requirement, tighting a bolt gets final product; If can not meet design requirement, need under the supporting leg that the bottom (head) steel supports, add backing plate and make it to meet design requirement.
7. nuclear island pressure vessel metallic reflection formula heat-insulation layer mounting process as claimed in claim 2; It is characterized in that, in step D, neutron shield thing in bottom is installed to bottom neutron shield thing steel bracket; According to on-site actual situations; Neutron shield things all except that corner part can move inward, the neutron shield thing at elder generation mount angle position during installation, but must guarantee the upper strata of all bottom neutron shield things and the gap between the body of wall of heap chamber; Lower floor's the first section of all bottom neutron shield things and the gap between the part of back meet design requirement; If can not meet the demands, need carry out reaming to the bolt hole on the bottom neutron shield thing steel bracket, make it to meet the demands;
Water conservancy diversion liner plate or warming plate to bottom (head) steel are installed are supported, promptly at first be installed into mouth of a river warming plate to bottom (head) steel and support, bottom (head) fair water fin to bottom (head) steel is installed is again supported, at the water conservancy diversion liner plate skin of correspondence the bottom (head) warming plate is installed respectively again.
8. nuclear island pressure vessel metallic reflection formula heat-insulation layer mounting process as claimed in claim 2; It is characterized in that; In step e; Install earlier on the steel corbel of upper neutron shielding thing support to the reactor cavity body of wall, the upper neutron shielding thing be installed again, guarantee between all upper neutron shielding things and the heap chamber body of wall the gap and and pressure vessel between the gap all meet design requirement; Ozzle root warming plate is installed then, is guaranteed that all warming plates install according to design attitude, mounting pipe mouth position steel supports again, and ozzle warming plate and top warming plate are installed at last.
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| CN107919174A (en) * | 2017-11-17 | 2018-04-17 | 中国核工业第五建设有限公司 | Insulating layer installation method in the middle part of AP1000 reactor pressure vessels |
| CN112037955A (en) * | 2020-08-20 | 2020-12-04 | 中国核工业第五建设有限公司 | Method for installing metal heat-insulating layer of reactor pressure vessel |
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| CN104141373A (en) * | 2013-05-07 | 2014-11-12 | 中国核工业二四建设有限公司 | Regulating device for steel liner of nuclear island |
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| CN107919174B (en) * | 2017-11-17 | 2019-07-23 | 中国核工业第五建设有限公司 | Insulating layer installation method in the middle part of AP1000 reactor pressure vessel |
| CN112037955A (en) * | 2020-08-20 | 2020-12-04 | 中国核工业第五建设有限公司 | Method for installing metal heat-insulating layer of reactor pressure vessel |
| CN112037955B (en) * | 2020-08-20 | 2023-03-10 | 中国核工业第五建设有限公司 | Method for installing metal heat-insulating layer of reactor pressure vessel |
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| CN102522126B (en) | 2014-04-16 |
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