CN113340672A - Nuclear power plant activated corrosion product sampling device - Google Patents
Nuclear power plant activated corrosion product sampling device Download PDFInfo
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- CN113340672A CN113340672A CN202010205538.1A CN202010205538A CN113340672A CN 113340672 A CN113340672 A CN 113340672A CN 202010205538 A CN202010205538 A CN 202010205538A CN 113340672 A CN113340672 A CN 113340672A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/20—Devices for withdrawing samples in the liquid or fluent state for flowing or falling materials
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/14—Suction devices, e.g. pumps; Ejector devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/34—Purifying; Cleaning
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21D—NUCLEAR POWER PLANT
- G21D1/00—Details of nuclear power plant
- G21D1/02—Arrangements of auxiliary equipment
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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
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Abstract
The invention discloses a sampling device for activated corrosion products of a nuclear power plant, which comprises a shunting assembly, a filtering assembly, a first sampling pipeline and a second sampling pipeline, wherein the shunting assembly comprises an input interface, a first output interface and a second output interface; the first sampling pipeline is connected with the first output interface and is used for sampling sample water which is to be branched from the first output interface; the filtering component is connected with the second output interface and the second sampling pipeline and is used for filtering the sample water which is branched from the second output interface and then outputting the filtered sample water from the second sampling pipeline so as to be sampled.
Description
Technical Field
The invention relates to the field of nuclear power sampling, in particular to a sampling device for activated corrosion products of a nuclear power plant.
Background
The main structures of the nuclear power station primary loop pipeline, the main pump shell, the pressure vessel and the like are made of austenitic stainless steel, and the evaporator heat transfer pipe is made of Inconcel 600 or Inconcel 690 alloy. Under the conditions of high temperature, high pressure and low dissolved oxygen, the outer oxide film on the surface of the material can be dissolved or suspended in the coolant, and when the concentration of corrosion products in the coolant does not reach the equilibrium concentration, the corrosion products are continuously dissolved and flow to all parts of the system along with the coolant. When these corrosion products are carried into the reactor core with the coolant, they are deposited on the surface of the fuel cladding with a high temperature and activated by neutron irradiation. When the temperature, solution pH or operating conditions of the primary system change, the activated corrosion products are again stripped from the fuel clad, enter the coolant, and are carried out of the core by the coolant. The dissolved state of the activated corrosion products can be brought into a desalting bed along with a coolant for purification, and insoluble solid state is easy to deposit on the inner surfaces of loop equipment and pipelines to form radiation source items, which is not beneficial to the control of the radiation source items of the nuclear power plant.
Therefore, according to the migration rule of the primary circuit activated corrosion products of the nuclear power plant in the uplink and downlink processes of the unit, the radiation source item of the primary circuit can be reduced as much as possible through reasonable chemistry and operation control, and the aims of purifying the reactor core and reducing the dosage of workers are fulfilled. In order to further research the migration rule of the primary circuit activated corrosion product in the up-down process of the unit of the nuclear power plant, chemical personnel need to frequently sample in the overhaul start-up and shut-down process of the unit of the nuclear power plant, filter samples by using a filter membrane of 0.45 mu m to track the migration rule of the activated corrosion product, and evaluate the deposition condition of the primary circuit activated corrosion product in a solid state by calculating the proportion of the primary circuit sample before and after filtration. Therefore, sampling of activated corrosion products from nuclear power plants is particularly critical.
At present, the sampling and filtering of the activated corrosion products of the nuclear power plant are performed in three ways, namely, firstly, the sampling before filtering is performed on a sampling system, and then the sampling is performed or the sampling and filtering are performed in different ways:
the first method is as follows: sending the sample before filtration to a laboratory, and performing suction filtration by using a vacuum suction filtration machine with a 0.45-micron filter membrane to prepare a filtered sample;
the second method comprises the following steps: sending the sample before filtration to a laboratory, and extracting the sample by using a syringe (a needle with a 0.45 mu m filter membrane is arranged on the syringe) to prepare a filtered sample;
the third method comprises the following steps: the sample before filtration was sampled in a sampling system, and then a 0.45 μm filter was attached to the system to sample the filtered sample.
The existing sampling mode of the activated corrosion products mainly has the following defects:
1) the activated corrosion products cannot be sampled simultaneously before and after filtration, and the samples are not representative. According to the third mode, when the activated corrosion product of the nuclear power plant is sampled, a sample before filtration needs to be taken firstly, a temporary filtering device needs to be installed, the average installation time is about 0.5min, the sample after filtration is sampled after installation, the sample before filtration and the sample after filtration have time difference, the sample before filtration and the sample after filtration cannot be sampled simultaneously, the representativeness of the sample is not strong, and the analysis of the migration rule of the activated corrosion product is not facilitated.
2) Long sample preparation or sampling time and low working efficiency
During the startup and shutdown of the nuclear power plant unit, the activated corrosion products need to be sampled at 34 points. Sampling was performed in the prior art manner, and each sample taken before filtration took about 4 min. In the first use mode, filtered samples are prepared, and each sample takes 8min on average; in the second use mode, filtered samples are prepared, and each sample takes about 5min on average; using method three, the filtered samples (with the filter installed) were sampled, taking about 4.5min per sample on average. I.e. the average time to obtain the samples before and after filtration is, in a manner of about 408 min; the second method takes about 306 min; about 289min is consumed in the third way. The sampling or sample preparation time of the existing three modes is long, and the working efficiency is reduced.
3) Increase the radiation dose of the sampling personnel, and is not favorable for the control of radiation protection
One of the principles of optimizing the radiation protection is to reduce the exposure time, and as can be seen from the above description, the three existing methods are used for sampling the activated corrosion products, the exposure time of the sampling personnel is longer, and the exposure dose of the sampling personnel is increased, which is not beneficial to the control of the radiation protection.
4) Increase the risk of radioactive contamination
In the first mode, a negative pressure type vacuum filter is needed for filtering samples, container equipment for filtering is glassware, and the glassware has a larger risk of breaking; and a syringe and a needle are needed for filtering the sample by the second mode, and the connection of the syringe and the needle is easy to fall off. Both the two filtering modes easily cause the splashing of high-radioactivity samples, and cause radioactive contamination of personnel, equipment and the ground.
Disclosure of Invention
The invention aims to solve the technical problem of providing a sampling device for activated corrosion products of a nuclear power plant, aiming at the defects in the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: constructing a sampling device for activated corrosion products of a nuclear power plant, wherein the sampling device comprises a flow dividing assembly, a filtering assembly, a first sampling pipeline and a second sampling pipeline; the flow dividing assembly comprises an input interface, a first output interface and a second output interface, wherein the input interface is simultaneously communicated with the first output interface and the second output interface so as to divide sample water injected into the input interface into the first output interface and the second output interface for simultaneous output; the first sampling pipeline is connected with the first output interface and is used for sampling sample water which is to be branched from the first output interface; and the filtering assembly is connected with the second output interface and the second sampling pipeline and is used for filtering the sample water branched from the second output interface and then outputting the filtered sample water from the second sampling pipeline so as to sample.
Preferably, the reposition of redundant personnel subassembly includes internal thread tee bend, two external screw thread adapters, external screw thread adapter, two external screw thread adapters are connected with the vertical end and the first horizontal end of internal thread tee bend respectively, external screw thread adapter is connected with the second horizontal end of internal thread tee bend.
Preferably, the first sampling pipeline comprises a first stainless steel pipe and a clamping sleeve ball valve, the middle of the first stainless steel pipe is bent, one end of the clamping sleeve ball valve is connected with the first stainless steel pipe, and the other end of the clamping sleeve ball valve is connected with an external thread rotating pipe at a first horizontal end of the internal thread tee joint.
Preferably, the filter assembly comprises an upper flange cover, a lower flange cover, a filter chip and a plurality of external thread bolts, and the second sampling pipeline comprises an external thread rotating sleeve joint and a second stainless steel pipe bent in the middle;
a plurality of internal thread bolt holes are arranged on the upper flange cover along the edge of the upper flange cover, a plurality of internal thread bolt holes are arranged on the lower flange cover along the edge of the lower flange cover, an internal thread sample inflow hole is arranged on the upper flange cover close to the circle center, an internal thread sample outflow hole is arranged on the lower flange cover close to the circle center, the upper flange cover and the lower flange cover are spliced with each other, the internal thread bolt holes of the upper flange cover and the lower flange cover are opposite, the filter chip is clamped between the upper flange cover and the lower flange cover, a plurality of external thread bolts are connected with the internal thread bolt holes of the upper flange cover and the internal thread bolt holes of the lower flange cover to lock the upper flange cover and the lower flange cover, the internal thread sample inflow hole of the upper flange cover is connected with an external thread-to-external thread joint at the second horizontal end of the internal thread tee joint, and two ends of the external thread rotating clamping sleeve joint are respectively connected with the internal thread sample outflow hole of the lower flange cover and the second stainless steel pipe.
Preferably, a groove is formed in the splicing surface of the upper flange cover and/or the splicing surface of the lower flange cover so that a space for accommodating the filter element is formed after the upper flange cover and the lower flange cover are spliced.
Preferably, the filter assembly further comprises a gasket, and a gasket groove for positioning the gasket is formed in the edge position of the splicing surface of the upper flange cover and/or the splicing surface of the lower flange cover.
Preferably, the filter assembly further comprises a plurality of support legs with external threads arranged at the end parts, and a plurality of internal thread support holes for mounting the support legs are formed in the bottom surface of the lower flange cover along the edge of the lower flange cover.
Preferably, the female tee is an NPT3/8 ' female tee, the male swivel joint is an NPT3/8 ' male swivel 1/4 ' pipe joint, and the male swivel joint is an NPT3/8 ' male swivel NPT1/4 ' male joint.
Preferably, the first stainless steel tube is an 1/4 'stainless steel tube, and the ferrule ball valve is a 1/4' ferrule ball valve.
Preferably, the male threaded rotating ferrule fitting is a NPT1/4 "male threaded rotating 1/4" ferrule fitting, and the second stainless steel tube 1/4 "stainless steel tube.
The sampling device for the activated corrosion products of the nuclear power plant has the following beneficial effects: according to the invention, sample water enters from the input interface of the flow dividing assembly and then is divided into two output interfaces, the first sampling pipeline samples the sample water which is divided from the first output interface, and the filtering assembly filters the sample water which is divided from the second output interface and then outputs the sample water from the second sampling pipeline, so that the sampling function before and after filtering can be realized, the sampling time is shortened, the working efficiency is improved, the radiation irradiation dose of sampling personnel is reduced, and the radioactive contamination risk is reduced; the whole device is small in size, and is convenient to take and store into a sampling glove box; the whole device is convenient to connect, does not need welding and other processes, and is convenient to install; during sampling, the connection is only needed once, and the subsequent sampling can be not detached again, so that the time for mounting and detaching is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts:
FIG. 1 is a schematic diagram of the configuration of an activated corrosion product sampling device of a nuclear power plant according to the present invention;
FIG. 2 is a schematic diagram of a screen construction;
FIG. 3 is a front view of the upper flange cover;
FIG. 4 is a view of the reverse side of the upper flange cover;
FIG. 5 is a front view of the lower flange cover;
fig. 6 is a view showing the reverse side of the lower flange cover.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Exemplary embodiments of the invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete. It should be understood that the embodiments and specific features in the embodiments of the present invention are described in detail in the present application, but not limited to the present application, and the features in the embodiments and specific features in the embodiments of the present invention may be combined with each other without conflict.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
The terms including ordinal numbers such as "first", "second", and the like used in the present specification may be used to describe various components, but the components are not limited by the terms. These terms are used only for the purpose of distinguishing one constituent element from other constituent elements. For example, a first component may be named a second component, and similarly, a second component may also be named a first component, without departing from the scope of the present invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, the sampling device for activated corrosion products of a nuclear power plant according to the present invention includes a flow dividing assembly, a filtering assembly, a first sampling pipeline and a second sampling pipeline, wherein the flow dividing assembly includes an input interface, a first output interface and a second output interface, and the input interface is simultaneously communicated with the first output interface and the second output interface so as to divide sample water injected into the input interface into the first output interface and the second output interface for simultaneous output; the first sampling pipeline is connected with the first output interface and is used for sampling sample water which is to be branched from the first output interface; and the filtering assembly is connected with the second output interface and the second sampling pipeline and is used for filtering the sample water branched from the second output interface and then outputting the filtered sample water from the second sampling pipeline so as to sample.
Wherein, with reference to fig. 1-2, the flow diversion assembly includes an internally threaded tee 4, two externally threaded swivel joints 3 and 6, and an externally threaded swivel joint 5. The first sampling pipeline comprises a first stainless steel pipe 1 and a clamping sleeve ball valve 2, wherein the middle of the first stainless steel pipe is bent. The filtering component comprises an upper flange cover 7, a lower flange cover 8, a filter element piece 13 and a plurality of external thread bolts 11, and the second sampling pipeline comprises an external thread rotating sleeve joint 9 and a second stainless steel pipe 10 bent in the middle.
More specifically, the female tee joint 4 is an NPT3/8 ' female tee joint, the male swivel joints 3 and 6 are both NPT3/8 ' male-to-male 1/4 ' pipe joints, and the male-to-male connector 5 is an NPT3/8 ' male-to-NPT 1/4 ' male connector. The first stainless steel pipe 1 is an 1/4 'stainless steel pipe, and the ferrule ball valve 2 is a 1/4' ferrule ball valve. The external thread-rotating ferrule joint 9 is an NPT1/4 ' external thread-rotating 1/4 ' ferrule joint, and the second stainless steel pipe 10 is a 1/4 ' stainless steel pipe. The thickness of the upper flange cover 7 and the thickness of the lower flange cover 8 are both 10mm, and the radius is both 60 mm. The filter element sheet comprises a circular filter membrane facing the upper flange cover 7 and a circular filter screen 13 facing the lower flange cover 8, the filter membrane is 0.45 μm thick, and the filter screen 13 is 1mm thick and 40mm in radius.
The two external thread rotating pipe joints 3 and 6 are respectively connected with the vertical end and the first horizontal end (the horizontal end towards the left in the drawing) of the internal thread tee joint 4, and the external thread rotating pipe joint 5 is connected with the second horizontal end (the horizontal end towards the lower in the drawing) of the internal thread tee joint 4. One end of the cutting sleeve ball valve 2 is connected with the first stainless steel pipe 1, and the other end of the cutting sleeve ball valve 2 is connected with an external thread rotating pipe joint 3 at a first horizontal end of the internal thread tee joint 4.
Referring to fig. 3-6, the upper flange cover 7 is provided along its edge with a plurality of female screw holes 710, specifically three NPT1/8 "female screw holes at 120 ° to each other. A plurality of internal thread bolt holes 810, specifically three NPT1/8 "internal thread bolt holes forming an angle of 120 degrees with each other, are formed in the lower flange cover 8 along the edge thereof. An internal thread sample inflow hole 720, specifically an NPT1/4 "internal thread hole, is formed in the upper flange cover 7 near the center of the circle. An internal thread sample outflow hole 830, specifically an NPT 1/4' internal thread hole, is formed in the lower flange cover 8 close to the center of the circle. The upper flange cover 7 and the lower flange cover 8 are spliced with each other, the internal thread bolt holes 710 and 810 of the upper flange cover 7 and the lower flange cover 8 are opposite, the filter chip is clamped between the upper flange cover 7 and the lower flange cover 8, the external thread bolts 11 are connected to the internal thread bolt holes 710 of the upper flange cover 7 and the internal thread bolt holes 810 of the lower flange cover 8 so as to lock the upper flange cover 7 and the lower flange cover 8, the internal thread sample inflow hole 720 of the upper flange cover 7 is connected with the external thread-to-external thread joint 5 at the second horizontal end of the internal thread tee joint 4, and two ends of the external thread rotating sleeve joint 9 are respectively connected with the internal thread sample outflow hole 830 of the lower flange cover 8 and the second stainless steel pipe 10.
Preferably, a circular groove 820 is formed in the splicing surface of the lower flange cover 8, so that a space for accommodating the filter element is formed after the upper flange cover 7 and the lower flange cover 8 are spliced, and the depth of the groove 820 is 3mm, and the radius of the groove is 40 mm. It should be understood that, in other embodiments, the groove 820 may also be shifted to be opened to the splicing surface of the upper flange cover 7, and grooves may also be opened on both the splicing surface of the upper flange cover 7 and the splicing surface of the lower flange cover 8, as long as the upper flange cover 7 and the lower flange cover 8 are spliced to form a space for accommodating the filter element.
Preferably, the filter assembly further comprises a circular gasket 840 to prevent sample water from leaking out of a split gap between the upper flange cover 7 and the lower flange cover 8, and the cross-sectional radius of the gasket 840 is 1.5 mm. Further preferably, when the gasket 840 is installed for better positioning, a gasket groove 730 for positioning the gasket 840 is formed along an edge position on a splicing surface of the upper flange cover 7, the gasket groove 730 is located at a position of 45mm of the radius of the upper flange cover 7, and the gasket groove 730 is 1mm deep and 2mm wide. It will be appreciated that in other embodiments, the solution of the present embodiment may be modified to provide gasket grooves along the edge on the splicing surfaces of the flange cover 8, or modified to provide gasket grooves along the edge on the splicing surfaces of both the upper flange cover 7 and the lower flange cover 8.
Preferably, the filter assembly further includes 3 bracket legs 12 having external threads at ends thereof, the bottom surface of the lower flange cover 8 is provided with 3 internal thread bracket holes 850, specifically NPT1/8 ″ internal thread bolt holes, along the edge of the lower flange cover 8, the 3 bracket legs 12 are connected to the 3 internal thread bracket holes 850, and the 3 internal thread bracket holes 850 form 120 ° with each other and form 60 ° with the 3 internal thread bolt holes 810.
The assembly process of the device is as follows: referring to fig. 1, two male and female screw adapters 3 and 6 are respectively connected to a vertical end and a horizontal end of a female screw tee 4, a male and female screw adapter 5 is connected to the other horizontal end of the female screw tee 4, a first stainless steel pipe 1 is connected to one end of a ferrule ball valve 2, the other end of the ferrule ball valve 2 is connected to the male screw adapter 3, a second stainless steel pipe 10 is connected to one end of a male screw ferrule 9, the other end of the male screw ferrule 9 is connected to a female screw sample outlet hole 830 of a lower flange cover 8, three brackets 12 are respectively connected to female screw bracket holes 850 of the lower flange cover 8, a filter mesh 13 is first installed in a groove 820 of the lower flange cover 8, a filter membrane of 0.45 μm is then installed, an upper flange cover 7 is placed right above the lower flange cover 8, and a sealing gasket 840 is ensured to be inserted into the groove 730, three male screw bolts 11 are coupled to the female screw bolt holes 710 and 810 in the upper and lower flange covers 7 and 8, so that the upper and lower flange covers 7 and 8 are firmly coupled, and the other end of the male screw-to-male screw joint 5 is coupled to the female screw sample inflow hole 720 in the upper flange cover 7.
Use this device to activate the sample of corrosion products, place this in the sample glove box, use special hose to connect external screw thread adapter 6, the sample valve of opening the system, opening device's cutting ferrule ball valve 2, adjust cutting ferrule ball valve 2's aperture, sample water shunts into two the tunnel after flowing into internal thread tee bend 4, flow out from first nonrust steel pipe 1 all the way, another way flows out simultaneously from nonrust steel pipe 10 of second after 0.45 mu m filter membrane filters, use the sample bottle to take a sample simultaneously, after the sample, the sample valve of closing the system can.
The device of the embodiment has the following beneficial effects:
1) the function of sampling the activated corrosion product before and after filtration is realized, the simultaneity of the sample is ensured, and the analysis of the migration rule of the activated corrosion product is facilitated.
2) The sampling time is shortened, and the working efficiency is improved. Owing to can realize the function of taking a sample before and after filtering activation corrosion product simultaneously, consequently the sampling time can shorten greatly than former sample mode, at the start-stop process of nuclear power plant unit, samples 34 points, can consume time about 136min altogether, and work efficiency obviously promotes.
3) The radiation exposure dose of the sampling personnel is reduced. Because the function of sampling before and after the filtration to the activation corrosion product can be realized, shorten the sample time, and then the time that the personnel of taking a sample received the radiation irradiation can shorten, consequently reduced the personnel of taking a sample and received the dose of radiation irradiation, more accord with the principle of radiation protection optimization.
4) The risk of radioactive contamination is reduced. When using this device to carry out the sample of nuclear power plant's activation corrosion product, except changing the membrane, all the other time devices can be deposited in the sample glove box always, have panel and gloves to keep apart between glove box and the personnel, do not have direct contact between personnel and the sampling device, and then have reduced the radioactivity and have stained the risk.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A nuclear power plant activated corrosion product sampling device is characterized by comprising a flow dividing assembly, a filtering assembly, a first sampling pipeline and a second sampling pipeline; the flow dividing assembly comprises an input interface, a first output interface and a second output interface, wherein the input interface is simultaneously communicated with the first output interface and the second output interface so as to divide sample water injected into the input interface into the first output interface and the second output interface for simultaneous output; the first sampling pipeline is connected with the first output interface and is used for sampling sample water which is to be branched from the first output interface; and the filtering assembly is connected with the second output interface and the second sampling pipeline and is used for filtering the sample water branched from the second output interface and then outputting the filtered sample water from the second sampling pipeline so as to sample.
2. The device of claim 1, wherein the flow diversion assembly comprises an internally threaded tee, two externally threaded swivel joints, and an externally threaded swivel joint, the two externally threaded swivel joints being connected to a vertical end and a first horizontal end of the internally threaded tee, respectively, the externally threaded swivel joint being connected to a second horizontal end of the internally threaded tee.
3. The device of claim 2, wherein the first sampling line comprises a first stainless steel pipe bent in the middle and a ferrule ball valve, one end of the ferrule ball valve is connected with the first stainless steel pipe, and the other end of the ferrule ball valve is connected with an external thread rotating pipe at a first horizontal end of the internal thread tee joint.
4. The apparatus of claim 2, wherein the filter assembly comprises an upper flange cover, a lower flange cover, a filter element, a plurality of externally threaded bolts, and the second sampling line comprises an externally threaded rotating sleeve joint, a second stainless steel tube bent in the middle;
a plurality of internal thread bolt holes are arranged on the upper flange cover along the edge of the upper flange cover, a plurality of internal thread bolt holes are arranged on the lower flange cover along the edge of the lower flange cover, an internal thread sample inflow hole is arranged on the upper flange cover close to the circle center, an internal thread sample outflow hole is arranged on the lower flange cover close to the circle center, the upper flange cover and the lower flange cover are spliced with each other, the internal thread bolt holes of the upper flange cover and the lower flange cover are opposite, the filter chip is clamped between the upper flange cover and the lower flange cover, a plurality of external thread bolts are connected with the internal thread bolt holes of the upper flange cover and the internal thread bolt holes of the lower flange cover to lock the upper flange cover and the lower flange cover, the internal thread sample inflow hole of the upper flange cover is connected with an external thread-to-external thread joint at the second horizontal end of the internal thread tee joint, and two ends of the external thread rotating clamping sleeve joint are respectively connected with the internal thread sample outflow hole of the lower flange cover and the second stainless steel pipe.
5. The device of claim 4, wherein the splicing surface of the upper flange cover and/or the splicing surface of the lower flange cover are provided with grooves so that a space for accommodating the filter element is formed after the upper flange cover and the lower flange cover are spliced.
6. The apparatus of claim 4, wherein the filter assembly further comprises a gasket, and a gasket groove for positioning the gasket is formed on the splicing surface of the upper flange cover and/or the splicing surface of the lower flange cover at an edge position.
7. The apparatus of claim 4, wherein the filter assembly further comprises a plurality of bracket legs having external threads at ends thereof, and a plurality of internal threaded bracket holes for mounting the plurality of bracket legs are formed in the bottom surface of the lower flange cover along edges of the lower flange cover.
8. The apparatus of claim 2 wherein the box tee is an NPT3/8 "box tee, the pin swivel is an NPT 3/8" pin swivel 1/4 "coupling, and the pin swivel is an NPT 3/8" pin swivel NPT1/4 "pin coupling.
9. The apparatus of claim 3, wherein the first stainless steel tube is an 1/4 "stainless steel tube and the ferrule ball valve is a 1/4" ferrule ball valve.
10. The apparatus of claim 4, wherein the externally threaded rotating ferrule is a NPT1/4 "externally threaded rotating 1/4" ferrule, the second stainless steel tube 1/4 "stainless steel tube.
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| CN202010205538.1A CN113340672A (en) | 2020-03-20 | 2020-03-20 | Nuclear power plant activated corrosion product sampling device |
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| CN202010205538.1A CN113340672A (en) | 2020-03-20 | 2020-03-20 | Nuclear power plant activated corrosion product sampling device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115400478A (en) * | 2022-07-20 | 2022-11-29 | 中国核电工程有限公司 | A filter equipment for acquireing nuclear power plant's coolant impurity |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115400478A (en) * | 2022-07-20 | 2022-11-29 | 中国核电工程有限公司 | A filter equipment for acquireing nuclear power plant's coolant impurity |
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