CN104900281A - Nuclear reactor pressure vessel sealing ring production apparatus and nuclear reactor pressure vessel sealing ring production method - Google Patents
Nuclear reactor pressure vessel sealing ring production apparatus and nuclear reactor pressure vessel sealing ring production method Download PDFInfo
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- CN104900281A CN104900281A CN201410076558.8A CN201410076558A CN104900281A CN 104900281 A CN104900281 A CN 104900281A CN 201410076558 A CN201410076558 A CN 201410076558A CN 104900281 A CN104900281 A CN 104900281A
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- packing ring
- nickel
- reactor pressure
- pressure vessel
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C21/00—Apparatus or processes specially adapted to the manufacture of reactors or parts thereof
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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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- Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
The present invention belongs to the technical field of nuclear reactor maintenance, and particularly relates to a nuclear reactor pressure vessel sealing ring production apparatus with characteristics of major overhaul construction period shortening and nuclear radiation dose reducing, and a nuclear reactor pressure vessel sealing ring production method. The nuclear reactor pressure vessel sealing ring production apparatus comprises a simulated body (1), 6 square tubes (2), 4 lifting lugs (3) and a center fixation device (4), wherein the simulated body (1) is the ring tube installation, one ends of the 6 square tubes (2) and the inner ring of the simulated body (1) are fixed, the other ends are fixed on the center fixation device (4) at the circle center of the simulated body (1), and the 4 lifting lugs (3) are uniformly distributed on the inner ring of the simulated body (1). According to the present invention, with the nickel washer produced by using the new apparatus, the critical path major overhaul time and the electric station collective radiation dose can be substantially reduced, wherein the critical path time can be saved by 14 h, the cost can be saved by more than 10000000 yuan per year, and the staff collective radiation dose can be reduced by 3man.mSv.
Description
Technical field
The invention belongs to nuclear power plant reactor service technique field, be specifically related to a kind of nuclear reactor pressure container O-ring seal producing device and method for making.
Background technology
Nuclear power plant reactor pressure vessel adopts bimetallic (spring cone) seal circle hermetically-sealed construction, lower flange end face has 2 concentric " V " type seal grooves, for laying the φ 5mm O-ring seal be made up of metallic nickel hereinafter referred to as " nickel packing ring ", realize the sealing between pressure vessel and top cover by 54 kingbolts and nickel packing ring.
Each reactor pressure vessel solution sealing all needs to change nickel packing ring later, require the coordinating of nickel packing ring and V-type groove very high, total backlash≤1.7mm between same position nickel packing ring and V-type groove outboard sidewalls, girth deviation is less than 1mm, and the altitude range that nickel packing ring exceeds V-type groove is 1.7 ± 0.2mm.In view of above-mentioned strict demand, the making of nickel packing ring must be carried out at reactor pressure vessel sealing surface, and the nickel wire docking reaching 12 meters is welded into the nickel packing ring measure-alike with V-type groove.
Summary of the invention
Technical matters to be solved by this invention is, not enough for prior art, provides a kind of and shortens the overhaul duration, reduces nuclear reactor pressure container O-ring seal producing device and the method for making of nuclear radiation dosage.
The technical solution adopted in the present invention is:
A kind of nuclear reactor pressure container O-ring seal producing device, comprise analogue body, 6 square tubes, 4 hangers and center stationary installations, wherein analogue body is circle pipe dress, one end of 6 square tubes and the inner ring of analogue body are fixed, the other end is fixed on to be located in the center stationary installation in the analogue body center of circle, the inner ring of analogue body is uniform-distribution with 4 hangers.
Described analogue body 1 comprises and is solidly connected bolt, V-shaped groove, flange section and base for supporting, and wherein base for supporting has 4 pieces of plate " mouth " fonts to be spliced, and flange section is fixed on base for supporting upper end by coupling bolt, and flange section upper surface is provided with two V-shaped grooves.
A kind of nuclear reactor pressure container O-ring seal method for making, comprises the following steps:
Step one, is installed in V-type groove by nickel packing ring blank, the whole length of nickel wire measures its diameter every 1.0 meters, guarantees that diameter is 5.0
-0.2within the scope of mm, correct with nonmetal hammer, hit tight it, use lead to compress nickel packing ring, the total backlash δ 1+ δ 2≤1.7mm of same position nickel packing ring and analogue body V-type groove both sides, nickel packing ring gives prominence to the height of primary sealing area within the scope of 1.7 ± 0.2mm;
Step 2, flange analogue body cuts nickel packing ring joint redundance, and redundance nickel wire connects use as simulating piece test weld, and will consider to expand with heat and contract with cold to nickel packing ring Accuracy, nickel packing ring elongation is determined according to following formulae discovery simultaneously:
Δl=C
O·ΔT·α
Wherein Δ L is the elongation of nickel packing ring under temperature difference T; Δ T is the temperature difference of reactor pressure vessel V-type groove and flange analogue body; α is the thermal linear expansion coefficient of metallic nickel; CO is pressure vessel V-type groove perimeter value.
Step 3, bevel for welding prepares, according to root face 2
-0.5mm, groove angle 27 ° 30 ' ± 3 °, group to gap 0-1mm, bevel for welding nonconcentricity≤0.1mm bevel for welding;
Step 4, filing weld seam, after butt welded seam polishing, has not allowed annular cut, weld diameter 5
-0.2within the scope of mm, butt welded seam carries out the grade estimation of liquid penetrant inspection and welding;
Step 5, the welding of formal part and inspection, weld nickel packing ring, filing weld seam.After butt welded seam polishing, do not allow annular cut, weld diameter 5
-0.2within the scope of mm, butt welded seam carries out liquid penetrant inspection and welding quality evaluation;
Step 6, the nickel packing ring made is put in the V-type groove of the main faying face of pressure vessel, the total backlash δ 1+ δ 2≤1.7mm of same position nickel packing ring and reactor pressure vessel V-type groove both sides, nickel packing ring gives prominence to the height of primary sealing area within the scope of 1.7 ± 0.2mm, carries out the sealing 30 minutes 2MPa gas pressure tests after reactor sealing; Whole primary Ioops has carried out the hydraulic testing of 17.6Mpa.
The invention has the beneficial effects as follows:
1. the nickel packing ring simultaneously adopting new equipment to make can greatly reduce overhaul critical path time and power station collective radiation dosage;
2. the nickel packing ring adopting new equipment to make can save critical path time 14 hours;
3. cost-saving annual more than 1,000 ten thousand yuan, reduce personnel's collective radiation dosage 3manmSv.
Accompanying drawing explanation
Fig. 1 is nuclear reactor pressure container O-ring seal producing device schematic diagram;
Fig. 2 is nuclear reactor pressure container O-ring seal producing device sectional view;
In figure: 1. simulation topic, 2. square tube, 3. hanger, 4. center stationary installation, be 5. fixedly connected with bolt, 6.V shape groove, 7. flange section, 8. base for supporting.
Embodiment
Below in conjunction with drawings and Examples, one provided by the invention is introduced:
A kind of nuclear reactor pressure container O-ring seal producing device, comprise analogue body 1,6 square tubes 2,4 hangers 3 and center stationary installation 4, wherein analogue body 1 is circle pipe dress, one end of 6 square tubes 2 and the inner ring of analogue body 1 are fixed, the other end is fixed on to be located in the center stationary installation 4 in the analogue body center of circle, the inner ring of analogue body 1 is uniform-distribution with 4 hangers 3.
Described analogue body 1 comprises and is solidly connected bolt 5, V-shaped groove 6, flange section 7 and base for supporting 8, wherein base for supporting 8 has 4 pieces of plate " mouth " fonts to be spliced, flange section 7 is fixed on base for supporting 8 upper end by coupling bolt 5, and flange section 7 upper surface is provided with two V-shaped grooves 6.
A kind of nuclear reactor pressure container O-ring seal method for making, comprises the following steps:
Step one, is installed in V-type groove by nickel packing ring blank, the whole length of nickel wire measures its diameter every 1.0 meters, guarantees that diameter is 5.0
-0.2within the scope of mm, correct with nonmetal hammer, hit tight it, use lead to compress nickel packing ring, the total backlash δ 1+ δ 2≤1.7mm of same position nickel packing ring and analogue body V-type groove both sides, nickel packing ring gives prominence to the height of primary sealing area within the scope of 1.7 ± 0.2mm;
Step 2, flange analogue body cuts nickel packing ring joint redundance, and redundance nickel wire connects use as simulating piece test weld, and will consider to expand with heat and contract with cold to nickel packing ring Accuracy, nickel packing ring elongation is determined according to following formulae discovery simultaneously:
ΔL=C
O·ΔT，α
Wherein Δ L is the elongation of nickel packing ring under temperature difference T; Δ T is the temperature difference of reactor pressure vessel V-type groove and flange analogue body; α is the thermal linear expansion coefficient of metallic nickel; CO is pressure vessel V-type groove perimeter value.
Step 3, bevel for welding prepares, according to root face 2
-0.5mm, groove angle 27 ° 30 ' ± 3 °, group to gap 0-1mm, bevel for welding nonconcentricity≤0.1mm bevel for welding;
Step 4, filing weld seam, after butt welded seam polishing, has not allowed annular cut, weld diameter 5
-0.2within the scope of mm, butt welded seam carries out the grade estimation of liquid penetrant inspection and welding;
Step 5, the welding of formal part and inspection, weld nickel packing ring, filing weld seam.After butt welded seam polishing, do not allow annular cut, weld diameter 5
-0.2within the scope of mm, butt welded seam carries out liquid penetrant inspection and welding quality evaluation;
Step 6, the nickel packing ring made is put in the V-type groove of the main faying face of pressure vessel, the total backlash δ 1+ δ 2≤1.7mm of same position nickel packing ring and reactor pressure vessel V-type groove both sides, nickel packing ring gives prominence to the height of primary sealing area within the scope of 1.7 ± 0.2mm, carries out the sealing 30 minutes 2MPa gas pressure tests after reactor sealing; Whole primary Ioops has carried out the hydraulic testing of 17.6Mpa.
Nuclear power station overhaul window, use the physical size of laser tracker to reactor pressure vessel primary sealing area seal groove accurately to measure, measurement result is accurate to millimeter.
Flange analogue body V-type groove and reactor pressure vessel main faying face V-type groove girth deviation are less than 1mm, V-type rooved face roughness Ra is less than 1.6, be that flange analogue body V-type groove put into by the steel ball of 5 ± 0.005mm by diameter, the altitude range that steel ball exceeds V-type groove is 1.7 ± 0.2mm, and V-type groove interior surface does not allow to occur the defects such as burr, cut, pit.Flange analogue body material is stainless steel, and Long-Time Service can not deform, and whole flange analogue body is one-piece construction, flange analogue body supports energy long-term safety reliably pivot flange analogue body, do not deform and corrosion, flange analogue body arranges hanger, convenient lifting.
Flange analogue body processing and fabricating requires: the reactor pressure vessel seal groove physical size recorded according to laser tracker carries out the processing and manufacturing work that nickel packing ring makes analogue body flange.After making work completes, reuse the seal groove physical size of laser measuring apparatus to flange analogue body and carry out confirmatory measurement.The seal groove of tackling flange analogue body if desired re-starts processing and measures.
Claims (3)
1. a nuclear reactor pressure container O-ring seal producing device, it is characterized in that: comprise analogue body (1), 6 square tubes (2), 4 hangers (3) and center stationary installations (4), wherein analogue body (1) is circle pipe dress, one end of 6 square tubes (2) and the inner ring of analogue body (1) are fixed, the other end is fixed on to be located in the center stationary installation (4) in the analogue body center of circle, the inner ring of analogue body (1) is uniform-distribution with 4 hangers (3).
2. a kind of nuclear reactor pressure container O-ring seal producing device according to claim 1, it is characterized in that: described analogue body (1) comprises and is solidly connected bolt (5), V-shaped groove (6), flange section (7) and base for supporting (8), wherein base for supporting (8) has 4 pieces of plate " mouth " fonts to be spliced, flange section (7) is fixed on base for supporting (8) upper end by coupling bolt (5), and flange section (7) upper surface is provided with two V-shaped grooves (6).
3. a nuclear reactor pressure container O-ring seal method for making, is characterized in that: comprise the following steps:
Step one, is installed in V-type groove by nickel packing ring blank, the whole length of nickel wire measures its diameter every 1.0 meters, guarantees that diameter is 5.0
-0.2within the scope of mm, correct with nonmetal hammer, hit tight it, use lead to compress nickel packing ring, the total backlash δ 1+ δ 2≤1.7mm of same position nickel packing ring and analogue body V-type groove both sides, nickel packing ring gives prominence to the height of primary sealing area within the scope of 1.7 ± 0.2mm;
Step 2, flange analogue body cuts nickel packing ring joint redundance, and redundance nickel wire connects use as simulating piece test weld, and will consider to expand with heat and contract with cold to nickel packing ring Accuracy, nickel packing ring elongation is determined according to following formulae discovery simultaneously:
ΔL=CO·ΔT·α
Wherein Δ L is the elongation of nickel packing ring under temperature difference T; Δ T is the temperature difference of reactor pressure vessel V-type groove and flange analogue body; α is the thermal linear expansion coefficient of metallic nickel; CO is pressure vessel V-type groove perimeter value.
Step 3, bevel for welding prepares, according to root face 2
-0.5mm, groove angle 27 ° 30 ' ± 3 °, group to gap 0-1mm, bevel for welding nonconcentricity≤0.1mm bevel for welding;
Step 4, filing weld seam, after butt welded seam polishing, has not allowed annular cut, weld diameter 5
-0.2within the scope of mm, butt welded seam carries out the grade estimation of liquid penetrant inspection and welding;
Step 5, the welding of formal part and inspection, weld nickel packing ring, filing weld seam.After butt welded seam polishing, do not allow annular cut, weld diameter 5
-0.2within the scope of mm, butt welded seam carries out liquid penetrant inspection and welding quality evaluation;
Step 6, the nickel packing ring made is put in the V-type groove of the main faying face of pressure vessel, the total backlash δ 1+ δ 2≤1.7mm of same position nickel packing ring and reactor pressure vessel V-type groove both sides, nickel packing ring gives prominence to the height of primary sealing area within the scope of 1.7 ± 0.2mm, carries out the sealing 30 minutes 2MPa gas pressure tests after reactor sealing; Whole primary Ioops has carried out the hydraulic testing of 17.6Mpa.
Priority Applications (1)
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| CN201410076558.8A CN104900281B (en) | 2014-03-04 | 2014-03-04 | A kind of nuclear reactor pressure container sealing ring producing device and production method |
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| CN201410076558.8A CN104900281B (en) | 2014-03-04 | 2014-03-04 | A kind of nuclear reactor pressure container sealing ring producing device and production method |
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| CN104900281A true CN104900281A (en) | 2015-09-09 |
| CN104900281B CN104900281B (en) | 2018-07-06 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106980734A (en) * | 2017-04-05 | 2017-07-25 | 北京理工大学 | A kind of RPV sealing property computational methods for considering material and contact nonlinear |
| CN109036602A (en) * | 2018-07-27 | 2018-12-18 | 中国核动力研究设计院 | Reference templates are used in a kind of installation of nuclear reactor structure |
| CN109346199A (en) * | 2018-10-10 | 2019-02-15 | 江苏核电有限公司 | A kind of nuclear power station valve and nozzle weld water test unit and its installation method |
| CN110814646A (en) * | 2019-10-24 | 2020-02-21 | 上海岳乾激光科技有限公司 | Machining method of wear-resistant sealing ring |
| CN114193086A (en) * | 2021-11-12 | 2022-03-18 | 江苏核电有限公司 | Off-line manufacturing method for nickel gasket of main sealing surface of reactor pressure vessel |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106980734A (en) * | 2017-04-05 | 2017-07-25 | 北京理工大学 | A kind of RPV sealing property computational methods for considering material and contact nonlinear |
| CN106980734B (en) * | 2017-04-05 | 2020-02-07 | 北京理工大学 | RPV sealing performance calculation method considering material and contact nonlinearity |
| CN109036602A (en) * | 2018-07-27 | 2018-12-18 | 中国核动力研究设计院 | Reference templates are used in a kind of installation of nuclear reactor structure |
| CN109346199A (en) * | 2018-10-10 | 2019-02-15 | 江苏核电有限公司 | A kind of nuclear power station valve and nozzle weld water test unit and its installation method |
| CN109346199B (en) * | 2018-10-10 | 2023-08-15 | 江苏核电有限公司 | Nuclear power station valve and connecting pipe weld joint hydraulic pressure test device and installation method thereof |
| CN110814646A (en) * | 2019-10-24 | 2020-02-21 | 上海岳乾激光科技有限公司 | Machining method of wear-resistant sealing ring |
| CN114193086A (en) * | 2021-11-12 | 2022-03-18 | 江苏核电有限公司 | Off-line manufacturing method for nickel gasket of main sealing surface of reactor pressure vessel |
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| CN104900281B (en) | 2018-07-06 |
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