CN110196216B - Method, system and device for testing third-number seal filter of main pump - Google Patents
Method, system and device for testing third-number seal filter of main pump Download PDFInfo
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- 238000012360 testing method Methods 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 50
- 239000007788 liquid Substances 0.000 claims abstract description 35
- 238000007789 sealing Methods 0.000 claims abstract description 33
- 239000002351 wastewater Substances 0.000 claims abstract description 21
- 238000002347 injection Methods 0.000 claims description 12
- 239000007924 injection Substances 0.000 claims description 12
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 238000012423 maintenance Methods 0.000 abstract description 3
- 239000012530 fluid Substances 0.000 description 9
- 239000002826 coolant Substances 0.000 description 5
- 238000009434 installation Methods 0.000 description 5
- 238000012795 verification Methods 0.000 description 3
- 238000005406 washing Methods 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
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- 230000009286 beneficial effect Effects 0.000 description 1
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- 230000001050 lubricating effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
- G01N15/0826—Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
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- G—PHYSICS
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- G—PHYSICS
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- G21C—NUCLEAR REACTORS
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- G21C17/06—Devices or arrangements for monitoring or testing fuel or fuel elements outside the reactor core, e.g. for burn-up, for contamination
- G21C17/07—Leak testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N2015/084—Testing filters
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention discloses a method, a system and a device for testing a No. three seal filter of a main pump, wherein the method comprises the following steps: s1, sequentially connecting a quantitative adjusting pump, a pressure gauge, a filter, a third sealed filter to be tested and a wastewater collecting device, and adjusting a pressure reducing valve arranged on the pressure gauge to enable the initial working pressure to be a first preset pressure value; s2, injecting the pump liquid into a quantitative adjusting pump, injecting water and pressurizing, so that the pump liquid is discharged into a wastewater collection device after sequentially passing through a pressure gauge, a filter and a third sealing filter; s3, judging whether the pressure gauge displays the reading and does not exceed a second preset pressure value, and meanwhile, continuously flowing out liquid from an outlet of the third sealed filter, if so, passing the test; if not, the signal does not pass. According to the method, the system and the device for testing the third sealed filter of the main pump, water is injected into the third sealed filter through the quantitative adjusting pump, the pressure of the injected water is observed through the pressure gauge, the pressure of the injected water can be adjusted through the pressure reducing valve, and the reliability of maintenance equipment is improved.
Description
Technical Field
The invention relates to the field of rotating machinery, in particular to a method, a system and a device for testing a No. three seal filter of a main pump.
Background
The reactor coolant system (RCP) is a primary loop system of a nuclear power plant, a CPR1000 (China million kilowatt pressurized water reactor nuclear power plant) nuclear power unit is provided with three loops, and each loop is provided with a reactor coolant pump (main pump) for driving a coolant to circularly flow in the primary loop system and continuously transferring heat generated in a reactor core to secondary side water supply of a steam generator. The main pump ensures that there is an appropriate flow of coolant through the core to ensure that the reactor core is cooled against the occurrence of film boiling.
The main pump is a vertical single-stage centrifugal pump with a controllable leakage shaft seal device. The mechanical seal of the main pump is the weakest and most sensitive of all the components, and its function is to assume the function of a primary seal, the condition of which directly affects the availability of the main pump.
The working environment pressure is 15.5MPa and the temperature is 292 ℃ when the CPR1000 nuclear power unit main pump normally operates, and a special shaft seal device is arranged on the main pump in order to prevent high-temperature, high-pressure and radioactive coolant from leaking. The shaft seal device of the main pump adopts three shaft seals, the first-stage seal is hydrostatic pressure controllable leakage seal, and the second-stage seal and the third-stage seal are friction type seals.
The third shaft seal of the main pump injects shaft seal water by a gravity pressure head (1.06bar) of a water supply main pipe of the REA system, 1/2 flow of the shaft seal water flows through one side of the shaft seal for washing, cooling and lubricating friction surfaces of a sliding ring and a static ring and is discharged into a second shaft seal leakage pipeline, and 1/2 flows to the tail end of a washing shaft at the other side of the shaft seal and is discharged into an RPE system, so that the requirement on the water quality of injected water is particularly high, and an injected water filter, namely a third sealing filter of the main pump, is arranged at an injection flange of a third sealing chamber.
The No. three sealed filter essential element of main pump includes check valve and filter core, and after No. three sealed filter core of main pump and check valve installation for a long time, the patency can only be verified through comparatively simple and easy mode in the field verification, but can not effectual verification injected water's continuation, all appear No. three injection filter in a plurality of nuclear power bases and lead to the not smooth incident of water, should verify the mode risk in addition higher (pressure can't be controlled, personnel stain the risk higher).
Disclosure of Invention
The invention aims to provide an improved method, system and device for testing a No. three seal filter of a main pump.
The technical scheme adopted by the invention for solving the technical problems is as follows: the method for testing the No. three seal filter of the main pump comprises the following steps:
s1, sequentially connecting a quantitative adjusting pump, a pressure gauge, a filter, a No. three sealed filter to be tested and a wastewater collecting device, and adjusting a pressure reducing valve arranged on the pressure gauge to enable the initial working pressure to be a first preset pressure value;
s2, injecting pump liquid into the quantitative regulating pump, injecting water and pressurizing, so that the pump liquid is discharged into the wastewater collection device after sequentially passing through the pressure gauge, the filter and the third sealing filter;
s3, judging whether the pressure gauge displays the reading and does not exceed a second preset pressure value, and meanwhile, continuously flowing out liquid from an outlet of the third seal filter, if so, passing the test; if not, the test is not passed.
Preferably, the method further comprises the following steps:
s4, judging whether the indication number of the pressure gauge reaches the second preset pressure value and no liquid flows out from the outlet of the third sealing filter, if so, checking and fastening the joints of the devices, and returning to the step S1.
Preferably, the method further comprises the following steps:
s5, judging whether no liquid passes through the third sealed filter, if so, checking and resetting a check valve and a filter element in the third sealed filter, and then returning to the step S1.
Preferably, the first preset pressure value is 0.05-0.15 MPa; and/or the second preset pressure value is 0.05-0.15 MPa.
Preferably, the first preset pressure value is 0.1 MPa; and/or the second preset pressure value is 0.1 MPa.
Preferably, in step S2, the water injection pressure is a manual pressure.
Preferably, in step S2, the pump fluid is clean demineralized water.
Also provided is a test system for a No. three seal filter of a main pump, which utilizes the method, and comprises the following steps:
the device comprises a connection adjusting device, a pressure gauge, a filter, a third sealed filter to be tested and a wastewater collecting device, wherein the connection adjusting device is used for sequentially connecting the quantitative adjusting pump, the pressure gauge, the filter, the third sealed filter to be tested and the wastewater collecting device, and adjusting a pressure reducing valve arranged on the pressure gauge to enable the initial working pressure to be a first preset pressure value;
the pump liquid and pressurizing device is used for injecting pump liquid into the quantitative regulating pump and injecting water and pressurizing, so that the pump liquid is discharged into the wastewater collecting device after sequentially passing through the pressure gauge, the filter and the third sealing filter;
the first judgment device is used for judging whether the pressure gauge displays the display number and does not exceed a second preset pressure value and continuous liquid flows out from an outlet of the third sealed filter, and if so, the test is passed; if not, the test is not passed.
Preferably, the method further comprises the following steps:
the second judgment device is used for judging whether the indication number of the pressure gauge reaches the second preset pressure value or not and no liquid flows out from the outlet of the third sealing filter, and if yes, the second judgment device returns to the connection adjusting device after the joints of the devices are checked and fastened;
and/or the presence of a gas in the gas,
and the third judgment device is used for judging whether no liquid passes through the third sealed filter, if so, checking and resetting a check valve and a filter element in the third sealed filter, and then returning to the connection regulation device.
Still provide a No. three sealed filter testing arrangement of main pump, including aforementioned any one quantitative regulation pump, manometer, filter, No. three sealed filter and waste water collection device.
The beneficial effects of the implementation of the invention are as follows: according to the method, the system and the device for testing the third sealing filter of the main pump, water is injected into the third sealing filter through the quantitative adjusting pump, the pressure of the injected water is observed through the pressure gauge and can be adjusted through the pressure reducing valve, the quality of the injected water is ensured through the filter, the smoothness and the continuity of the third sealing filter are continuously observed, and therefore the reliability of maintenance equipment is improved.
The method, the system and the device for testing the third sealing filter of the main pump are effective and reliable, simple and convenient to operate, solve the specific problems from scratch, improve the personnel overhauling technology and the equipment overhauling quality, and improve the equipment reliability. The method, the system and the device for testing the third sealing filter of the main pump also realize the function of accurate adjustment, thereby ensuring the complete function of the third sealing filter which is installed again. Practice proves that the method is one of the simplest, most practical, most effective and most economical methods.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic illustration of a primary pump number three seal filter test apparatus in accordance with certain embodiments of the present invention;
FIG. 2 is a flow chart of a method for testing a seal filter number three of a main pump according to some embodiments of the present invention;
fig. 3 is a schematic diagram of a primary pump No. three seal filter test system in some embodiments of the invention.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
Fig. 1 shows a test device for a number three seal filter of a main pump in some embodiments of the present invention, which is used for performing a water injection smoothness and continuity check test on the number three seal filter of the main pump after installation. The testing device for the third sealed filter of the main pump in the embodiment of the invention comprises a quantitative adjusting pump 10, a pressure gauge 20, a filter 30, a third sealed filter 40 and a waste water collecting device 50, wherein the quantitative adjusting pump 10 is used for injecting pump liquid and manually pressurizing, the pressure gauge 20 is used for testing real-time working pressure on a pipeline and displaying the real-time working pressure through the indication of the pressure gauge 20, a pressure reducing valve 21 in the pressure gauge 20 can adjust the pressure of injected water, the filter 30 is used for filtering water quality, the third sealed filter 40 is a filter to be tested, and the waste water collecting device 50 is used for receiving waste water discharged by the third sealed filter 40.
Fig. 2 illustrates a method for testing a primary pump No. three sealing filter according to some embodiments of the present invention, and a testing process of the device and the method for testing the primary pump No. three sealing filter according to some embodiments of the present invention is described below with reference to fig. 1 and 2.
First, the availability of the constant-volume adjusting pump 10, the pressure gauge 20, the pressure reducing valve 21, and the filter 30 is checked, and the constant-volume adjusting pump 10 is cleaned to ensure that the water chamber of the constant-volume adjusting pump 10 is clean and free of foreign matter.
In step S1, the quantitative adjustment pump 10, the pressure gauge 20, the filter 30, the No. three sealed filter 40 to be tested, and the wastewater collection device 50 are sequentially connected, and a pressure reducing valve 21 provided on the pressure gauge 20 is adjusted so that the initial working pressure is a first preset pressure value. In this embodiment, the installation can be performed manually by field personnel in sequence, or can be performed automatically by an automatic installation device, and the specific installation mode is not limited as long as the related functions can be realized. Alternatively, the first predetermined pressure value is 0.05-0.15 MPa. Preferably, the first predetermined pressure value is 0.1 Mpa.
Preferably, when the field personnel manually install the quantitative adjusting pump 10, the pressure reducing valve 21, the pressure gauge 20, the filter 30 and the third sealing filter 40 are sequentially installed; connecting a pipeline of a quantitative regulating pump 10 with a pressure reducing valve 21, screwing a joint by using a wrench, connecting a filter 30 with a third sealing filter 40 by using a water pipe, fastening and fixing connecting parts at two ends by using a clamp, checking whether the connecting parts of all parts are fastened or not in detail, adjusting the working pressure (less than or equal to 0.1MPa) of the pressure reducing valve 21, and ensuring that the test prerequisite condition is met; an open container (i.e., waste water collection device 50) is prepared for receiving water through the No. three seal filter 40.
Then, in step S2, the pump fluid is injected into the constant-volume control pump 10, and the pump fluid is pumped so that the pump fluid passes through the pressure gauge 20, the filter 30, and the third seal filter 40 in this order, and then is discharged into the waste water collecting device 50. Alternatively, in step S2, the water injection is manually pressed, or may be automatically pressed by an automatic pressing device, which is not limited herein, as long as the related function can be realized. Preferably, in step S2, the pump fluid is clean demineralized water.
Then, in step S3, it is determined whether the pressure gauge 20 displays the indication number and does not exceed a second preset pressure value, and the continuous liquid flows out from the outlet of the third seal filter 40, if yes, the test is passed; if not, the test is not passed. Alternatively, the second predetermined pressure value is 0.05-0.15 MPa. Preferably, the second preset pressure value is 0.1 MPa.
Preferably, when the field personnel manually press, clean demineralized water is injected into the water chamber of the quantitative regulating pump 10; and starting a water injection test, manually pressing, observing the change condition of the readings of the pressure gauge 20, paying attention to whether water continuously flows out from the outlet of the third sealed filter 40, and requiring that the pressure gauge 20 has the readings which are less than or equal to 0.1MPa and the outlet of the third sealed filter 40 continuously flows out. Alternatively, the indication of the pressure gauge 20 may be observed by human eyes, or may be automatically acquired by a pressure gauge indication acquisition device, which is not limited herein as long as the related functions can be realized. Alternatively, the continuous water flow at the outlet of the third sealing filter 40 can be observed by human eyes, or can be automatically collected by a water flow state collecting device, which is not limited herein, as long as the related functions can be realized.
In some preferred embodiments, the method further comprises step S4: and judging whether the indication number of the pressure gauge 20 reaches the second preset pressure value and no liquid flows out from the outlet of the third seal filter 40, if so, checking and fastening the joints of the devices, and returning to the step S1. Specifically, if no water flows out from the outlet of the No. three injection filter when the reading of the pressure gauge 20 reaches 0.1MPa, whether water seepage exists at the joint of each part is checked, and the test is carried out again.
In some preferred embodiments, the method further comprises step S5: and judging whether no liquid passes through the third sealed filter 40, if so, checking and resetting the check valve and the filter element in the third sealed filter 40, and returning to the step S1. It is understood that steps S4 and S5 may be selectively set to one or two or neither. Specifically, if no pump liquid passes through the third sealed filter 40, the test is not successful, the filter element and the check valve of the third sealed filter 40 are checked again, and the test is performed again after the reason is found and determined.
After the test is finished, all the parts are detached and placed, and the work is finished and the field is clean. Alternatively, the work of detaching and placing each component can be manually operated by a worker, or can be automatically operated by an automatic detaching device, and the operation is not limited in this case as long as related functions can be realized.
Fig. 3 shows a test system for a primary pump No. three sealing filter according to some embodiments of the present invention, which is performed by using the device and method for testing a primary pump No. three sealing filter according to the previous embodiments. The test system for the third sealing filter of the main pump in some embodiments of the present invention includes a connection adjusting device 100, a pumping and pressurizing device 200, a first judging device 300, a second judging device 400, and a third judging device 500.
Referring to fig. 1 to 3, the connection adjustment device 100 is used to sequentially connect the quantitative adjustment pump 10, the pressure gauge 20, the filter 30, the No. three sealed filter 40 to be tested, and the wastewater collection device 50, and adjust a pressure reducing valve 21 provided on the pressure gauge 20 so that the initial working pressure is a first preset pressure value. Alternatively, the first predetermined pressure value is 0.05-0.15 MPa. Preferably, the first predetermined pressure value is 0.1 Mpa.
The pump fluid and pressurizing device 200 is used for injecting the pump fluid into the quantitative adjustment pump 10, injecting water and pressurizing, so that the pump fluid passes through the pressure gauge 20, the filter 30 and the third sealing filter 40 in sequence and then is discharged into the wastewater collection device 50. Alternatively, the water injection pressurizing is manual pressurizing. Preferably, the pump fluid is clean demineralized water.
The first judging device 300 is used for judging whether the pressure gauge 20 displays the display number and does not exceed a second preset pressure value and continuous liquid flows out from the outlet of the third sealing filter 40, and if so, the test is passed; if not, the test is not passed. Alternatively, the second predetermined pressure value is 0.05-0.15 MPa. Preferably, the second preset pressure value is 0.1 MPa.
In some preferred embodiments, the system further comprises a second determining means 400 for determining whether the indication of the pressure gauge 20 reaches a second predetermined pressure value and no liquid flows out from the outlet of the third sealing filter 40, and if so, returning to the connection adjusting means 100 after checking and fastening the connection of the respective means.
In some preferred embodiments, the system further comprises a third determining means 500 for determining whether no liquid passes through the third seal filter 40, and if so, checking and resetting the check valve and the filter element in the third seal filter 40, and then returning to the connection adjusting means 100. It is understood that the second determining means 400 and the third determining means 500 may be selectively provided with one or two or neither.
According to the method, the system and the device for testing the third sealed filter of the main pump, the problem of difficulty in long-term verification is effectively and reliably solved, the third sealed filter 40 is filled with water through the quantitative adjusting pump 10, the pressure of the filled water is observed and can be ensured through the pressure gauge 20, the quality of the filled water is ensured through the filter 30, and therefore the smoothness and the continuity of the third sealed filter 40 are continuously observed, and the reliability of maintenance equipment is improved.
The application of the method, the system and the device for testing the No. three seal filters of the main pump in the embodiment of the invention in a power plant is as follows: the problem that water injection of a plurality of main pumps in a Nindde base and a red coastal base is not smooth appears in 2017, and the test device is developed aiming at the problem. In 2017, the test device verifies a plurality of devices on the site of the Bay base in the Asia, and the device tests that no abnormality occurs on the site of the injection filter, so that the safe and reliable operation of the devices is powerfully ensured.
The method, the system and the device for testing the No. three seal filters of the main pump in the embodiment of the invention contribute to the productivity of a power plant: the main pump is a key sensitive device of the nuclear power plant, and if the safe operation of the main pump cannot be guaranteed, the main pump needs to be stopped and disassembled for inspection. This test device inspects and verifies the No. three filters of main pump through scientific identification means, reduces and avoids human factor or spare part quality reason to the sealed safe operation influence of main pump.
The method, the system and the device for testing the No. three seal filter of the main pump in the embodiment of the invention bring direct economic benefits: the device is a first special tool which can visually check the smoothness of the third filter of the main pump in the world, fills the blank that the third sealed injection filter of the nuclear power main pump in China is not subjected to precision test, and improves the capability of fault diagnosis and fault analysis;
the method, the system and the device for testing the third seal filter of the main pump in the embodiment of the invention have the following indirect benefits: the damage of no injected water of No. three seals is avoided and the machine is shut down for first-aid repair, if the main pump seal needs to be repaired in daily unit period, the cost is nearly 10 full power equivalent days, and in addition, a large amount of radioactive waste is generated.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that several modifications and adaptations to those skilled in the art without departing from the principles of the present invention should also be considered within the scope of the present invention.
Claims (6)
1. A method for testing a No. three seal filter of a main pump is characterized by comprising the following steps:
s1, a quantitative adjusting pump (10), a pressure gauge (20), a filter (30), a third sealed filter (40) to be tested and a wastewater collecting device (50) are sequentially connected, and a pressure reducing valve (21) arranged on the pressure gauge (20) is adjusted to enable initial working pressure to be a first preset pressure value;
s2, injecting pump liquid into the quantitative regulating pump (10), injecting water and pressurizing, so that the pump liquid is discharged into the wastewater collecting device (50) after sequentially passing through the pressure gauge (20), the filter (30) and the third sealing filter (40); the pump liquid is clean demineralized water;
s3, judging whether the pressure gauge (20) displays the display number and does not exceed a second preset pressure value, and meanwhile, continuously flowing out liquid from an outlet of the third sealing filter (40), if so, passing the test; if not, the test is not passed;
s4, judging whether the indication number of the pressure gauge (20) reaches the second preset pressure value and no liquid flows out from the outlet of the third sealing filter (40), if so, checking and fastening the joints of the devices, and returning to the step S1.
2. The method of claim 1, further comprising:
s5, judging whether no liquid passes through the third sealed filter (40), if so, checking and resetting a check valve and a filter element in the third sealed filter (40), and then returning to the step S1.
3. The method according to any one of claims 1-2, wherein said first preset pressure value is comprised between 0.05 and 0.15 MPa; and/or the second preset pressure value is 0.05-0.15 MPa.
4. The method according to claim 3, characterized in that said first preset pressure value is 0.1 MPa; and/or the second preset pressure value is 0.1 MPa.
5. The method according to any one of claims 1-2, wherein in step S2, the water injection pressurization is manual pressurization.
6. A primary pump No. three seal filter testing system, using the method of any of claims 1-5, the system comprising:
the device comprises a connection adjusting device (100) and a waste water collecting device (50), wherein the connection adjusting device is used for sequentially connecting a quantitative adjusting pump (10), a pressure gauge (20), a filter (30), a No. three sealing filter (40) to be tested and the waste water collecting device (50), and adjusting a pressure reducing valve (21) arranged on the pressure gauge (20) to enable the initial working pressure to be a first preset pressure value;
the pump liquid and pressurizing device (200) is used for injecting pump liquid into the quantitative adjusting pump (10) and injecting water and pressurizing, so that the pump liquid is discharged into the wastewater collecting device (50) after sequentially passing through the pressure gauge (20), the filter (30) and the third sealing filter (40); the pump liquid is clean demineralized water;
the first judgment device (300) is used for judging whether the pressure gauge (20) displays the indication number and does not exceed a second preset pressure value and continuous liquid flows out of an outlet of the third sealing filter (40) or not, and if yes, the test is passed; if not, the test is not passed;
the system further comprises:
the second judgment device (400) is used for judging whether the indication number of the pressure gauge (20) reaches the second preset pressure value or not and no liquid flows out from the outlet of the third sealing filter (40), and if yes, the connection adjusting device (100) is returned after the connection positions of the devices are checked and fastened;
and/or the presence of a gas in the gas,
and a third judging device (500) for judging whether no liquid passes through the third sealing filter (40), if so, checking and resetting a check valve and a filter element in the third sealing filter (40), and then returning to the connection adjusting device (100).
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| US5152167A (en) * | 1991-02-08 | 1992-10-06 | Colman Manufacturing Company | Method and apparatus for measuring leakage in a fluid system |
| CN101639396B (en) * | 2009-09-08 | 2010-12-08 | 合肥通用机械研究院 | Mechanical seal test system for nuclear main pump |
| CN105179223B (en) * | 2015-09-07 | 2017-06-30 | 中广核核电运营有限公司 | The mechanical sealing assembly identification systems of main reactor pump |
| CN107179169B (en) * | 2017-06-14 | 2019-05-17 | 中广核工程有限公司 | A kind of nuclear power station check valve action test set and test method |
| CN208380952U (en) * | 2018-07-06 | 2019-01-15 | 中国核动力研究设计院 | A kind of main pump axle envelope auxiliary system |
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2019
- 2019-04-30 CN CN201910362540.7A patent/CN110196216B/en active Active
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