CN107967951B - Sluice gate pressure maintaining device during integral pressure test of containment - Google Patents
Sluice gate pressure maintaining device during integral pressure test of containment Download PDFInfo
- Publication number
- CN107967951B CN107967951B CN201610917811.7A CN201610917811A CN107967951B CN 107967951 B CN107967951 B CN 107967951B CN 201610917811 A CN201610917811 A CN 201610917811A CN 107967951 B CN107967951 B CN 107967951B
- Authority
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- China
- Prior art keywords
- penetrating piece
- pressure
- containment
- sluice gate
- safety shell
- Prior art date
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Links
- 238000012360 testing method Methods 0.000 title claims abstract description 38
- 230000000149 penetrating effect Effects 0.000 claims abstract description 51
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 46
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 23
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 20
- 239000010935 stainless steel Substances 0.000 claims abstract description 20
- 230000001502 supplementing effect Effects 0.000 claims abstract description 12
- 230000000903 blocking effect Effects 0.000 claims abstract description 11
- 238000003825 pressing Methods 0.000 claims abstract description 7
- 238000001363 water suppression through gradient tailored excitation Methods 0.000 claims abstract description 6
- 230000035515 penetration Effects 0.000 claims description 11
- 238000013461 design Methods 0.000 claims description 5
- 230000014759 maintenance of location Effects 0.000 claims description 4
- 238000012423 maintenance Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 abstract description 14
- 239000002390 adhesive tape Substances 0.000 abstract description 10
- 238000012544 monitoring process Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 239000000446 fuel Substances 0.000 description 6
- 238000007689 inspection Methods 0.000 description 5
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 4
- 239000004327 boric acid Substances 0.000 description 4
- 239000013589 supplement Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000002285 radioactive effect Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 239000002915 spent fuel radioactive waste Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/003—Remote inspection of vessels, e.g. pressure vessels
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
The invention belongs to the technical field of nuclear power station reactor overhaul, and particularly relates to a sluice gate pressure maintaining device for realizing remote monitoring and pressure maintaining of the relative pressure of two sluice gate adhesive tapes and ensuring the sealing effect of the sluice gate adhesive tapes during a containment vessel integral pressurizing test; the device comprises a safety shell standby penetrating piece (1), a formal pressurizing connector (3), an air supplementing clamping sleeve connector (4), a penetrating piece tightness test connector (5), a nitrogen cylinder (6), a pressure reducing valve (7), a stainless steel woven hose (8), a stop valve (9), a pressure gauge (10), a penetrating piece temporary blocking plate (11) and a water gate (12); the safety shell spare penetrating piece (1) penetrates through the outer safety shell and the inner safety shell, two short parts of the safety shell spare penetrating piece (1) are respectively provided with a penetrating piece temporary blocking plate (11), and a formal pressing joint (3) is arranged on the penetrating piece temporary blocking plate (11) on one side of the outer safety shell.
Description
Technical Field
The invention belongs to the technical field of nuclear power station reactor overhaul, and particularly relates to a sluice gate pressure maintaining device during a containment integral pressurizing test.
Background
The new generation core catcher is used for nuclear power plants with the probability of 100 thousands of times of core leakage accidents and collecting all radioactive products to prevent the radioactive products from flowing into the environment. 1400 tons of boric acid water are required to cool the core catcher. In combination with the overhaul requirement of the nuclear power plant, 700 tons of boric acid water is respectively contained in a reactor internals inspection well and a fuel pool which are positioned at two sides of a reactor vertical shaft during normal operation of the unit. During normal operation of the unit, a water gate (see figure I) is used for isolating the reactor vertical shaft from the fuel water tank and the inspection well of the components in the reactor. The gate adopts an inflatable sealing rubber strip as a sealing material, and the sealing rubber strip keeps the pressure within the range of 0.2-0.4Mpa (relative atmospheric pressure, the same applies below) to realize the gate sealing.
According to the requirements of the outline of the integral test of the containment, the integral pressure test of the containment is carried out on the double-layer safe shell every ten years. The test contents include: before the pressing test, the appearance inspection of containment concrete and steel structures and the measurement of relevant strength parameters are carried out; carrying out containment negative pressure test; measuring relevant parameters during positive pressure test of the containment; and (5) carrying out appearance inspection and related strength parameter measurement on the containment concrete and steel structure after depressurization. The positive pressure test of the containment needs to raise the relative pressure of the containment to 0.39MPa. The reactor vertical shaft and the inspection shaft of the internal components of the reactor are at the elevation below +24.5m during the whole pressure of the containment, namely, the two sides of the gate of FAB20AB904/905 are guaranteed to be free from water, so that the two gate rubber strips do not need to be inflated and sealed. The fuel pool water level needs to be kept at the elevation +33m to ensure that spent fuel is in boric acid water, so the two gate strips of FAB20AB902/903 need to be inflated and sealed to isolate the reactor shaft from the fuel pool.
During the continuous pressure rising period of the containment, if the pressure is not maintained by the pressure of the rubber strips on the two gates of FAB20AB902/903, the pressure in the sealing rubber strips is counteracted by the external environmental pressure, the rubber strips cannot play a role in sealing, and boric acid water in a fuel pool can be poured into a reactor vertical shaft, so that extremely serious consequences are caused. However, during the whole pressure test of the containment, personnel cannot enter the reactor hall to supplement air to the gate rubber strip according to a normal air supplementing method. Therefore, in consideration of various factors and in combination with the actual situation of the site, jiangsu nuclear power limited company develops a sluice gate pressure maintaining device during the integral pressure test of the containment for the first time.
Disclosure of Invention
The invention aims at overcoming the defects of the prior art, and provides a sluice gate pressure maintaining device for realizing remote monitoring and pressure maintaining of the relative pressure of two sluice gate adhesive tapes and ensuring the sealing effect of the sluice gate adhesive tapes during a containment integral pressing test.
The technical scheme of the invention is as follows:
A sluice gate pressure maintaining device during a containment integral pressurizing test comprises a containment spare penetrating piece, a formal pressurizing connector, an air supplementing clamping sleeve connector, a penetrating piece tightness test connector, a nitrogen bottle, a pressure reducing valve, a stainless steel woven hose, a stop valve, a pressure gauge, a penetrating piece temporary plugging plate and a sluice gate; the safety shell spare penetrating piece penetrates through the outer safety shell and the inner safety shell, two short parts of the safety shell spare penetrating piece are respectively provided with a penetrating piece temporary blocking plate, and a formal pressing joint is arranged on the penetrating piece temporary blocking plate on one side of the outer safety shell; the nitrogen cylinder is located the outer containment outside, and the nitrogen cylinder upper end is equipped with the relief pressure valve, has connect four stainless steel hoses on the relief pressure valve, four stainless steel hoses are connected with the one end of four manometers respectively through four stop valves, and four manometer other ends stretch out a stainless steel respectively and weave the hose and pass the spare water gate that runs through one side of containment and be connected with inlayer containment.
The temporary plugging plate is characterized in that a penetrating piece tightness test connector is arranged at the center of the temporary plugging plate of the outer penetrating piece, and four air supplementing clamping sleeve connectors are distributed on the outer side of the penetrating piece tightness test connector.
The temporary plugging plate of the penetrating piece is the same as the formal plugging plate design standard of the penetrating piece which is formally used.
The volume of the nitrogen cylinder is 30L, and the purity of the nitrogen filled in the nitrogen cylinder is 99.9%.
The beneficial effects of the invention are as follows:
1. the invention successfully completes the integral pressure test of the containment during the disassembly overhaul of the nuclear power station;
2. the relative pressure of four rubber strips of the sluice gate is remotely monitored outside the containment in two tests;
3. The pressure of the adhesive tape is maintained in a specified range remotely at each stage of pressure increasing and reducing of the containment, so that the effect of isolating the vertical shaft of the reactor from the fuel pool is realized by the sluice gate.
Drawings
FIG. 1 is a sluice gate pressure maintenance device during a containment integrity crush test;
FIG. 2 is a cross-sectional view of a temporary closure of a penetration;
FIG. 3 is a top view of a temporary closure of a penetration;
FIG. 4 is a schematic view of a penetration formal closure plate;
Fig. 5 is a schematic view of a penetration assembly.
Detailed Description
The invention is further described with reference to the following drawings and examples:
The utility model provides a containment whole is beaten and is pressed sluice gate pressure retention device during test, includes containment reserve penetration piece 1, formally is beaten and is connected 3, is mended air cutting ferrule joint 4, penetration piece leakproofness test joint 5, nitrogen bottle 6, relief valve 7, stainless steel woven hose 8, stop valve 9, manometer 10, penetration piece temporary closure plate 11, and sluice gate 12; the safety shell standby penetrating piece 1 penetrates through the outer safety shell and the inner safety shell, two short sides of the safety shell standby penetrating piece 1 are respectively provided with a penetrating piece temporary plugging plate 11, and a formal pressing joint 3 is arranged on the penetrating piece temporary plugging plate 11 on one side of the outer safety shell; the nitrogen cylinder 6 is located the outer containment outside, and nitrogen cylinder 6 upper end is equipped with relief pressure valve 7, has connect four stainless steel hoses 8 on the relief pressure valve 7, four stainless steel hoses 8 are connected with the one end of four manometers 10 respectively through four stop valves 9, and the other end of four manometers 10 stretches out a stainless steel respectively and weaves hose 8 and pass containment spare penetration piece 1 and be connected with sluice gate 12 of inlayer containment one side.
The center position of the outer penetrating member temporary plugging plate 11 is provided with a penetrating member tightness test connector 5, and four air supplementing clamping sleeve connectors 4 are distributed on the outer side of the penetrating member tightness test connector 5.
The temporary plugging plate 11 of the penetrating piece is the same as the design standard of the formally used temporary plugging plate 2 of the penetrating piece.
The volume of the nitrogen bottle 6 is 30L, and the purity of the nitrogen filled in the nitrogen bottle is 99.9%.
Nitrogen cylinder and pressure reducing valve: the nitrogen cylinder and the pressure reducing valve are matched to form an air source for maintaining the pressure of the sluice gate, and high-purity nitrogen with the volume of 30L and the purity of 99.9% is selected to ensure that the sluice gate has enough air source during the integral pressure test of the containment;
And ∈s containment spare penetration temporary closure plate: the set of sluice gate air supplementing device utilizes the spare penetrating piece of the containment to extend the sluice gate air supplementing pipeline out of the containment so as to realize remote pressure monitoring and pressure maintenance of the sluice gate. During normal operation of the unit, the pipe orifices at two sides of the spare penetrating piece are respectively provided with a plugging plate with the design pressure of 2 MPa. The blocking plate and the pipe orifice flange of the penetrating piece adopt a protruding surface flange sealing structure. And a pressing joint is arranged in the middle of the blocking plate at the pipe orifice of the penetrating piece at the outer containment side and used for checking the tightness of the penetrating piece. Therefore, when designing the sluice gate pressure holding device, a temporary closure plate of the same standard as the penetration piece formal closure plate is selected. The design pressure of the temporary plugging plate is 2MPa, the size and the sealing form are consistent with those of the formal plugging plate, and a penetrating piece tightness test joint is processed at the center of the temporary plugging plate at the outer containment side and is used for checking the tightness of the penetrating piece after the temporary plugging plate is installed. Four circular grooves are processed on two sides of the temporary plugging plate of the penetrating piece and are used for placing and welding the air supplementing clamping sleeve joint. The centers of the round grooves corresponding to the two sides of the temporary blocking plate are communicated and serve as nitrogen flow channels.
Pressure monitoring and pressure maintaining gauge stand: in order to conveniently monitor the sluice gate pressure and keep the sluice gate pressure within a specified range, the project group is to integrate 4 groups of pressure gauges, stop valves, connectors and pipelines on a bottom plate to form a pressure monitoring and pressure keeping gauge stand.
The ∈stainless steel braided hose: the stainless steel braided hose is selected for the air supplementing extension pipeline of the water gate in the pressure maintaining device, so that the pipeline is ensured to have enough rigidity, and the pipeline is prevented from being deformed or even cut off due to external force or rising environmental pressure during the pressurizing of the containment. The pipeline made of stainless steel can also effectively avoid pipeline damage caused by accidental fire. The stainless steel braided hose is matched with the cutting sleeve joint on the temporary plugging plate, sealing can be realized without adding a sealing gasket, and the sealing effect is good.
Before the integral pressure test of the containment, a sluice gate pressure maintaining device is installed. Four stainless steel woven hoses are used for connecting the corresponding cutting sleeve joints on the inner sides of the temporary plugging plates of the two penetrating pieces, and the two plugging plates are respectively installed on the connecting pipe flanges at the two ends of the penetrating pieces and sealed. And connecting a pressurizing pipeline to pressurize the cavity of the penetrating piece, and checking the tightness of the temporary plugging plate. Four cutting sleeve joints on the temporary plugging plate at the side of the outer containment are respectively connected with four channels on the pressure monitoring and pressure maintaining gauge stand by four stainless steel braided hoses. And then four stainless steel woven hoses are used for connecting the four cutting sleeve joints on the temporary plugging plate at the inner containment side to the air supplementing interfaces of the four sealing rubber strips of the sluice gate once according to the number, so that the sluice gate pressure maintaining device is installed.
Application of sluice gate pressure maintaining device
And in the pressure increasing and reducing stage of the containment, the project group supplements or exhausts air to the sluice gate adhesive tape through the pressure maintaining device according to the pressure increasing and reducing step to maintain the pressure (relative to the pressure in the containment) of the sluice gate adhesive tape within the range of 0.2-0.4 MPa. Meanwhile, in the pressure maintaining stage of the containment, the pressure monitoring and the number of pressure indicators on the pressure maintaining gauge stand are observed to monitor the pressure of the sluice gate adhesive tape. When the pressure is reduced, the pressure maintaining device supplements air to the water gate rubber strip to maintain the internal pressure of the rubber strip.
During the integral pressurizing test of the overhaul containment of the Tian Wan nuclear power station T202 and T109, the project group monitors the pressure of the FAB20AB902/903 sluice gate adhesive tape in real time by using the independently developed sluice gate pressure maintaining device and supplements or exhausts air in time, so that the remote monitoring and control of the pressure of the sluice gate adhesive tape are realized, the sealing effect of the sluice gate is ensured, and the integral pressurizing test of the containment is smoothly completed.
Claims (4)
1. A sluice gate pressure maintenance device during a containment integral pressure test, characterized in that: the device comprises a safety shell standby penetrating piece (1), a formal pressurizing connector (3), an air supplementing clamping sleeve connector (4), a penetrating piece tightness test connector (5), a nitrogen cylinder (6), a pressure reducing valve (7), a stainless steel woven hose (8), a stop valve (9), a pressure gauge (10), a penetrating piece temporary blocking plate (11) and a water gate (12); the safety shell spare penetrating piece (1) penetrates through the outer safety shell and the inner safety shell, two ends of the safety shell spare penetrating piece (1) are respectively provided with a penetrating piece temporary blocking plate (11), and a formal pressing joint (3) is arranged between the penetrating piece formal blocking plates (2) on one side of the outer safety shell; the nitrogen bottle (6) is located the outer containment outside, and nitrogen bottle (6) upper end is equipped with relief pressure valve (7), has connect four stainless steel braided hose (8) on relief pressure valve (7), four stainless steel braided hose (8) are connected with one end of four manometers (10) respectively through four stop valves (9), and one stainless steel braided hose (8) are stretched out respectively to four manometer (10) other ends and pass containment spare penetration piece (1) and be connected with sluice gate (12) of inlayer containment one side.
2. A containment vessel integrated crush test period sluice gate pressure retention device as claimed in claim 1, characterised in that: the temporary plugging plate (11) of the penetrating piece is provided with a penetrating piece tightness test connector (5) at the center, and four air supplementing clamping sleeve connectors (4) are distributed on the outer side of the penetrating piece tightness test connector (5).
3. A containment vessel integrated crush test period sluice gate pressure retention device as claimed in claim 1, characterised in that: the temporary plugging plate (11) of the penetrating piece is identical to the design standard of the formal plugging plate (2) of the penetrating piece which is used formally.
4. A containment vessel integrated crush test period sluice gate pressure retention device as claimed in claim 1, characterised in that: the volume of the nitrogen cylinder (6) is 30L, and the purity of the nitrogen filled in the nitrogen cylinder is 99.9%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610917811.7A CN107967951B (en) | 2016-10-20 | 2016-10-20 | Sluice gate pressure maintaining device during integral pressure test of containment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610917811.7A CN107967951B (en) | 2016-10-20 | 2016-10-20 | Sluice gate pressure maintaining device during integral pressure test of containment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107967951A CN107967951A (en) | 2018-04-27 |
| CN107967951B true CN107967951B (en) | 2024-06-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610917811.7A Active CN107967951B (en) | 2016-10-20 | 2016-10-20 | Sluice gate pressure maintaining device during integral pressure test of containment |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112797316A (en) * | 2019-11-14 | 2021-05-14 | 中核核电运行管理有限公司 | Emergency air source box for water gate of nuclear power station refueling pool |
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