CN102117667B - Underwater installing method for support positioning structure of irradiation monitoring pipe - Google Patents
Underwater installing method for support positioning structure of irradiation monitoring pipe Download PDFInfo
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- CN102117667B CN102117667B CN200910266195A CN200910266195A CN102117667B CN 102117667 B CN102117667 B CN 102117667B CN 200910266195 A CN200910266195 A CN 200910266195A CN 200910266195 A CN200910266195 A CN 200910266195A CN 102117667 B CN102117667 B CN 102117667B
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- hanging basket
- supporting
- positioning structure
- irradiation
- locating
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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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- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
The invention relates to the technical field of inspection on nuclear power station equipment, in particular discloses an underwater installing method for a support positioning structure of an irradiation monitoring pipe, which comprises the following steps of: simulating a hanging basket on a water surface to react a mirror image of installation position information in an underwater irradiation environment that workers can not enter to the water surface, and then installing the mirror image into water after the mirror image is adjusted on the water surface, thereby transplanting the adjusting precision on the water to an underwater position. Therefore, the method solves the problem that personnel can not directly carry out equipment installing precision adjustment on members in a stack in a process of inspecting the member in a nuclear reactor or a pressure container reactor, and also ensures the underwater remote installation precision of equipment.
Description
Technical field
The invention belongs to nuclear power plant equipment service technique field, be specifically related to a kind of method that irradiation monitoring pipe positioning supports structure is installed under water.
Background technology
The irradiation sample hose is positioned at the reactor inner pressure vessel; Be fixed in the protecting pipe of the outer irradiation monitoring pipe positioning supports structure of bracketplant cylindrical shell, be used for the monitoring pressure container cylindrical shell and receive neutron irradiation and thermal environment to influence the changes in material properties that is caused over against the material of active region.Irradiation sample pipe in the irradiation monitoring pipe positioning supports structure needs regularly to make an experiment from piling interior extraction the out, under normal and accident conditions, can both keep structural intergrity to confirm reactor pressure vessel.The about 2500mm of irradiation length of tube, irradiation monitoring pipe top is apart from the about 2000mm of hanging basket flange upper surface.In order to guarantee the smooth access of irradiation sample pipe, require its tube hub when irradiation monitoring pipe positioning supports structure is installed and hang the blue hole for hoist center of blue laws position degree between the two within ￠ 1mm; Otherwise technically influence the lifting of irradiation monitoring pipe in the protecting pipe of positioning supports structure.
The hole for hoist of irradiation monitoring pipe is being symmetrically distributed on the hanging basket flange; After installing under the irradiation monitoring pipe positioning supports constitution water; Protecting pipe center in the supporting construction must be distributed on the hanging basket flange circumference; And the outside about 10Sv/h of radiation dose rate of underwater reactor pressure vessel cradle cylinder body, the staff can't near, the installation of irradiation monitoring pipe positioning supports structure must be accomplished under water at a distance for this reason.The general locating and clamping apparatus that adopts is installed the positioning supports structure under water, when having a series of processing unit (plant)s on the locating and clamping apparatus and being convenient to install hanging basket is processed.But adopt the direct entry of locating and clamping apparatus to install, do not have preliminary installing and locating, installation accuracy is very poor, therefore needs installation method under a kind of high-precision irradiation monitoring pipe positioning supports constitution water.
Summary of the invention
The object of the present invention is to provide installation method under a kind of irradiation monitoring pipe positioning supports constitution water high-precision, safe, simple to operate.
Technical scheme of the present invention is following:
Installation method under a kind of irradiation monitoring pipe positioning supports constitution water, this method may further comprise the steps:
1) makes hanging basket analogue body waterborne according to the size of actual hanging basket flange hole, make the hanging basket analogue body symmetrical about the water surface with true hanging basket under water;
2) be positioning reference with the flange hole on the hanging basket analogue body flange face, locating and clamping apparatus is carried out pre-determined bit on the hanging basket analogue body, and adjust locating and clamping apparatus position degree in the horizontal direction;
3) irradiation monitoring pipe positioning supports structure is installed on the locating and clamping apparatus that pre-determined bit is good;
4), adjust the positional precision of the processing unit (plant) on the locating and clamping apparatus in the horizontal direction to irradiation monitoring pipe positioning supports structure;
5) be benchmark with the flange hole on the hanging basket analogue body, adjust locating and clamping apparatus and irradiation monitoring pipe positioning supports structure in vertical direction, its positioning reference and its positioning reference on the hanging basket analogue body are consistent;
6) locating and clamping apparatus being moved on to the water hanging basket from the hanging basket analogue body locatees;
7) pore of measurement irradiation monitoring pipe positioning supports structure and hanging basket flange hole position under water draw the distance size between hanging basket barrel and the irradiation monitoring pipe positioning supports structure stand thus, and according to this sized position degree adjustment pad;
8) mounting position degree adjustment pad on the irradiation monitoring pipe positioning supports structure upper bracket;
9) hang in irradiation monitoring pipe positioning supports structure in the water and on the locating and clamping apparatus of having had good positioning, carry out positioning clamping;
10) the tube hub relative datum of adjustment irradiation monitoring pipe positioning supports structure makes its position error less than 1mm, and the distance between adjustment position degree adjustment pad and the cradle cylinder body outer wall makes its gap less than 0.2mm;
11) irradiation monitoring pipe positioning supports structure is connected with the hanging basket member.
Under above-mentioned irradiation monitoring pipe positioning supports constitution water in the installation method; The positional precision of the processing unit (plant) on the described step 4) adjustment locating and clamping apparatus is meant; Adjust the head position of each processing unit (plant), make its center can with the support bracket bolt hole center-aligned of irradiation monitoring pipe positioning supports structure.
In the installation method, described step 11) comprises under above-mentioned irradiation monitoring pipe positioning supports constitution water:
A) processing bolt hole on cradle cylinder body at first;
B) bolt hole is carried out tapping, after tapping finishes bolt hole is washed, cleans;
C) give the screw-down torque of locating supporting construction mounting process bolt and pretension 50NM.
Remarkable technique effect of the present invention is: on the water surface, simulate hanging basket; Installation site information mirror image in the radiation environment of the inaccessiable underwater of staff is reacted on the water surface; After on the water surface, adjusting entry is being installed; So adjustment precision waterborne is transplanted under water, has been solved well that personnel can't directly carry out the difficult problem that precision of equipment installation is adjusted in the maintenance process of nuclear reactor pressure container in-pile component on in-pile component; Such method also guarantees the remote installation accuracy of equipment under water.
Description of drawings
Embodiment
Below in conjunction with accompanying drawing and embodiment method of the present invention is done further explain.
1) makes hanging basket analogue body waterborne according to the size of actual hanging basket flange hole, make the hanging basket analogue body symmetrical about the water surface with true hanging basket under water;
Gordian technique that supporting and positioning structure of irradiation surveillance capsule is installed under water requires: the protecting pipe of supporting and positioning structure of irradiation surveillance capsule and to the center degree error of hanging basket flange hole for hoist within the 1mm scope.In order to reach such installation accuracy, then must make adjustment analogue body waterborne according to actual processing dimension of hanging blue flange hole.
Analog form is to take the partial simulation of hanging basket flange, only only needs the situation of hanging basket flange face to simulate waterborne getting final product.
At first the aperture and the distributing position size of hanging blue flange hole are under water carried out underwater survey; With this measurement result is the analogue body according to processing hanging basket flange; Can operating mode under water be copied to waterbornely to come with this, can improve installment work feasibility under water and reliability greatly like this.
2) be positioning reference with the flange hole on the hanging basket analogue body flange face, locating and clamping apparatus is carried out pre-determined bit on the hanging basket analogue body, and adjust locating and clamping apparatus position degree in the horizontal direction.
3) irradiation monitoring pipe positioning supports structure is installed on the locating and clamping apparatus that pre-determined bit is good;
With the flange hole on the hanging basket analogue body is that benchmark is adjusted the locus degree of the tube hub of irradiation monitoring pipe positioning support structure, the final tube hub that makes the supporting location structure with respect to the position degree at datum hole center within the 1mm scope; After irradiation monitoring pipe positioning support structure space positional precision adjustment finished, all on the locating and clamping apparatus were all confirmed the position of the physical construction that the locus of irradiation monitoring pipe positioning support structure limits.
4) positional precision of the processing unit (plant) on the adjustment locating and clamping apparatus;
The positioning support structure is after the adjustment of the space orientation on the locating and clamping apparatus finishes, and the position with the positioning support structure is a benchmark then, on locating and clamping apparatus, the positional precision of all processing unit (plant)s is under water adjusted.Comprise the head position of adjusting each processing unit (plant), can be alignd with the bolt hole center on the support of irradiation monitoring pipe positioning supports structure in its center;
5) be benchmark with the flange hole on the hanging basket analogue body, adjust locating and clamping apparatus and irradiation monitoring pipe positioning supports structure in vertical direction, its positioning reference and its positioning reference on the hanging basket analogue body are consistent;
The hanging basket member hangs at the boric acid of 2400PPM under water; Locating and clamping apparatus is after the precision adjustment finishes on the hanging basket analogue body on the coast; To transmit under water that the positioning clamping system hangs in the water and in place on the hanging basket flange; Transmitting the positioning reference of locating and clamping apparatus on hanging basket under water also is the hanging basket flange hole, consistent with its positioning reference in simulation.So adjustment precision waterborne is transplanted under water, has been solved well that personnel can't directly carry out the difficult problem that precision of equipment installation is adjusted in the maintenance process of nuclear reactor pressure container in-pile component on in-pile component; Such method also guarantees the remote installation accuracy of equipment under water.
6) locating and clamping apparatus being moved on to the water hanging basket from the hanging basket analogue body locatees;
7) pore of measurement irradiation monitoring pipe positioning supports structure and hanging basket flange hole position under water draw the distance size between hanging basket barrel and the irradiation monitoring pipe positioning supports structure stand thus, and according to this sized position degree adjustment pad;
For the position degree requirement that guarantees that irradiation monitoring pipe positioning support structure is installed, must between the cylinder body outer wall of irradiation monitoring pipe positioning support structure and hanging basket member, adjust pad by mounting position degree.The processing dimension of this pad must be accomplished before the water under the positioning support structure and measure.Pad processing dimension definite opinion patented claim really " irradiation monitoring pipe positioning supports locations of structures degree method of adjustment and device "; The pore of measuring irradiation monitoring pipe positioning supports structure is D to the distance between the support; Measuring the hanging basket flange hole is d to the distance between the hanging basket barrel; Then the difference between D and the d is thought the gap length between hanging basket barrel and the irradiation monitoring pipe positioning supports structure stand, during this time mounting position degree adjustment pad in the crack.
8) mounting position degree adjustment pad on the irradiation monitoring pipe positioning supports structure upper bracket;
9) hang in irradiation monitoring pipe positioning supports structure in the water and on the locating and clamping apparatus of having had good positioning, carry out positioning clamping;
Locating and clamping apparatus hangs in irradiation monitoring pipe positioning support structure in the water and on locating and clamping apparatus, carries out positioning clamping after hoisted in position on the hanging basket; Because locating and clamping apparatus has been adjusted on analogue body the location mechanical location of the locus of supporting construction and finished, irradiation monitoring pipe positioning support structure can be accomplished the position degree adjustment of the relative hanging basket flange hole of its tube hub center reference under water rapidly.
10) the tube hub relative datum of adjustment irradiation monitoring pipe positioning supports structure makes its position error less than 1mm, and the distance between adjustment position degree adjustment pad and the cradle cylinder body outer wall makes its gap less than 0.2mm;
11) irradiation monitoring pipe positioning supports structure is connected with the hanging basket member.
A) processing bolt hole on cradle cylinder body at first;
B) bolt hole is carried out tapping, after tapping finishes bolt hole is washed, cleans;
C) give the screw-down torque of locating supporting construction mounting process bolt and pretension 50NM.
After service bolt installs, the position degree and the gap of adjustment pad of positioning support structure are measured once more, measurement result is within the scope of technical requirement, and the hole of cutting to irradiation monitoring pipe positioning support structure processes again.Fraising processing is cut in the structural hole of cutting of irradiation monitoring pipe positioning support.The register pin of irradiation monitoring pipe positioning support structure is installed.Remove the structural service bolt of irradiation monitoring pipe positioning support, formal bolt and locking cap are installed, and Bolt Torque is tightened to the technical standard of regulation.The position degree of irradiation monitoring pipe positioning support structure and the gap of adjustment pad are measured once more, and measurement result reaches the locking cap of clamping screw after the technical standard.
Claims (3)
1. supporting and positioning structure of irradiation surveillance capsule installation method under water is characterized in that this method may further comprise the steps:
1) makes hanging basket analogue body waterborne according to the size of actual hanging basket flange hole, make the hanging basket analogue body symmetrical about the water surface with true hanging basket under water;
2) be positioning reference with the flange hole on the hanging basket analogue body flange face, locating and clamping apparatus is carried out pre-determined bit on the hanging basket analogue body, and adjust locating and clamping apparatus position degree in the horizontal direction;
3) supporting and positioning structure of irradiation surveillance capsule is installed on the locating and clamping apparatus that pre-determined bit is good;
4), adjust the positional precision of the processing unit (plant) on the locating and clamping apparatus in the horizontal direction to supporting and positioning structure of irradiation surveillance capsule;
5) be benchmark with the flange hole on the hanging basket analogue body, adjust locating and clamping apparatus and supporting and positioning structure of irradiation surveillance capsule in vertical direction, its positioning reference and its positioning reference on the hanging basket analogue body are consistent;
6) locating and clamping apparatus being moved on to the water hanging basket from the hanging basket analogue body locatees;
7) pore of measurement supporting and positioning structure of irradiation surveillance capsule and hanging basket flange hole position under water draw the distance size between hanging basket barrel and the supporting and positioning structure of irradiation surveillance capsule support thus, and according to this sized position degree adjustment pad;
8) mounting position degree adjustment pad on the supporting and positioning structure of irradiation surveillance capsule upper bracket;
9) hang in supporting and positioning structure of irradiation surveillance capsule in the water and on the locating and clamping apparatus of having had good positioning, carry out positioning clamping;
10) the tube hub relative datum of adjustment supporting and positioning structure of irradiation surveillance capsule makes its position error less than 1mm, and the distance between adjustment position degree adjustment pad and the cradle cylinder body outer wall makes its gap less than 0.2mm;
11) supporting and positioning structure of irradiation surveillance capsule is connected with the hanging basket member.
2. supporting and positioning structure of irradiation surveillance capsule as claimed in claim 1 is installation method under water; It is characterized in that; Described step 4) is to supporting and positioning structure of irradiation surveillance capsule; The positional precision of adjusting the processing unit (plant) on the locating and clamping apparatus in the horizontal direction is meant: adjust the head position of each processing unit (plant), make its center can with the support bracket bolt hole center-aligned of supporting and positioning structure of irradiation surveillance capsule.
3. according to claim 1 or claim 2 supporting and positioning structure of irradiation surveillance capsule installation method under water is characterized in that described step 11) comprises:
A) processing bolt hole on cradle cylinder body at first;
B) bolt hole is carried out tapping, after tapping finishes bolt hole is washed, cleans;
C) give the screw-down torque that supports location structure mounting process bolt and pretension 50NM.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910266195A CN102117667B (en) | 2009-12-31 | 2009-12-31 | Underwater installing method for support positioning structure of irradiation monitoring pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910266195A CN102117667B (en) | 2009-12-31 | 2009-12-31 | Underwater installing method for support positioning structure of irradiation monitoring pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102117667A CN102117667A (en) | 2011-07-06 |
| CN102117667B true CN102117667B (en) | 2012-08-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200910266195A Active CN102117667B (en) | 2009-12-31 | 2009-12-31 | Underwater installing method for support positioning structure of irradiation monitoring pipe |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102568630B (en) * | 2010-12-09 | 2014-10-01 | 秦山核电有限公司 | Detachable internals maintaining support |
| CN104008690A (en) * | 2013-02-26 | 2014-08-27 | 江苏核电有限公司 | Reactor pressure vessel simulation test platform for nuclear power plant |
| CN104864856A (en) * | 2014-02-25 | 2015-08-26 | 上海核工程研究设计院 | Reactor internal hanging basket flange hoisting aperture center line measurement device and method |
| CN105489259B (en) * | 2014-09-18 | 2017-06-16 | 中国核动力研究设计院 | Reactor pressure vessel longevity phase irradiation method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4427621A (en) * | 1981-07-02 | 1984-01-24 | Westinghouse Electric Corp. | Jacking mechanism for upper internals structure of a liquid metal nuclear reactor |
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2009
- 2009-12-31 CN CN200910266195A patent/CN102117667B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4427621A (en) * | 1981-07-02 | 1984-01-24 | Westinghouse Electric Corp. | Jacking mechanism for upper internals structure of a liquid metal nuclear reactor |
Non-Patent Citations (4)
| Title |
|---|
| JP特开2001-343482A 2001.12.14 |
| JP特开平10-304647A 1998.11.13 |
| 段远刚等.秦山核电二期工程反应堆堆内构件设计.《核动力工程》.2003,第24卷(第2期), * |
| 王成林等.辐照监督管水下维修大型结构装置的吊装工艺.《机械工程师》.2007,(第11期), * |
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