CN113096840B - Reaction kettle for simulating dynamic test of reactor fuel rod cladding material - Google Patents
Reaction kettle for simulating dynamic test of reactor fuel rod cladding material Download PDFInfo
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- CN113096840B CN113096840B CN202110333435.8A CN202110333435A CN113096840B CN 113096840 B CN113096840 B CN 113096840B CN 202110333435 A CN202110333435 A CN 202110333435A CN 113096840 B CN113096840 B CN 113096840B
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/001—Mechanical simulators
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The invention discloses a reaction kettle for simulating a dynamic test of a reactor fuel rod cladding material, which comprises: a kettle body; the kettle cover is detachably covered on the kettle body; the top of the kettle cover is provided with an air inlet, and a detachable split type flange is arranged on the air inlet; the fuel assembly is arranged in the kettle body and comprises a fuel rod air inlet unit, and the fuel rod air inlet unit comprises a fuel rod air inlet pipe; the diameter of the fuel rod air inlet pipe is smaller than that of the air inlet, penetrates through the air inlet and is connected with an air pipe outside the reaction kettle through the split type flange. The reaction kettle has high separation degree, and can be used for conveniently cleaning the reaction kettle and replacing the inner shell material of the kettle.
Description
Technical Field
The invention relates to the technical field of nuclear power, in particular to a reaction kettle for simulating a dynamic test of a reactor fuel rod cladding material.
Background
Cladding is an important safety barrier in reactors for containment of fission products and prevention of fission product leakage. In order to ensure the safety of nuclear power, the cladding is required to have enough performances of high temperature resistance, high pressure resistance, corrosion resistance and the like; it is also desirable that the inner and outer surfaces of the cladding in a high temperature, high pressure and water cooled environment do not exceed design temperatures under normal operating reactor core conditions, and that the cladding metal layer be thick enough to support the fuel elements.
To ensure that the cladding meets the requirements, the cladding material needs to be subjected to performance tests of reactor core service, including oxidation characteristics (corrosion resistance characteristics), which have important guidance in promoting nuclear safety. To evaluate the oxidation characteristics of the cladding material, a simulation of the high temperature and high pressure environment of the reactor core is required. In a loop formed by a coolant, the base metal of the cladding will develop an oxide layer, while corrosion products in the coolant will deposit to form a deposit, so that the corrosion behavior of the cladding material can be studied by dynamic detection of the water phase of the loop.
In the related technology, a layered electric heating mode is mainly adopted to simulate the radial temperature gradient of the cladding under the real condition, but the requirements on heat insulation materials of different sections are high, and the target is difficult to realize. Or a grid for transversely fixing the fuel rods is adopted, but the simulation is insufficient, the fuel rods are simply fixed, the abrasion to the fuel rods is serious, and the influence of the grid of the fuel assembly on the corrosion behavior of the cladding material is not involved, so that the simulation cladding performance is influenced. Or, in the related art, the core is heated by filling high-temperature and high-pressure water, but the simulated core temperature is insufficient, so that solid solution in the actual environment cannot be generated by the cladding, and the service environment of the cladding material under the working condition of the core cannot be truly reflected.
In addition, the simulation device adopted in the simulation test of the related art has high integration degree and low separation degree, and is very inconvenient for cleaning the reaction kettle and replacing the fuel assembly.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the reaction kettle for simulating the dynamic test of the cladding material of the reactor fuel rod is simple in structure and convenient to disassemble and clean, high-temperature and high-pressure gas heated to 1000 ℃ by the electric heater can be filled into the fuel rod, and the physical and chemical quantities such as temperature, pressure, flow rate, concentration and pH value in a loop can be measured to study the characteristics of the cladding surface deposition layer.
Specifically, the technical scheme adopted by the invention is as follows:
a reaction vessel comprising:
a kettle body;
the kettle cover is detachably covered on the kettle body; the top of the kettle cover is provided with an air inlet, and a detachable split type flange is arranged on the air inlet;
the fuel assembly is arranged in the kettle body and comprises a fuel rod air inlet unit, and the fuel rod air inlet unit comprises a fuel rod air inlet pipe; the diameter of the fuel rod air inlet pipe is smaller than that of the air inlet, penetrates through the air inlet and is connected with an air pipe outside the reaction kettle through the split type flange.
The reaction kettle according to the first aspect of the invention has at least the following beneficial effects:
according to the invention, the air inlet with the diameter larger than that of the fuel rod air inlet pipe is formed in the kettle cover, the fuel rod air inlet pipe is connected with the air pipe outside the reaction kettle through the split flange, the split flange is removed after the test is finished, the fuel rod air inlet pipe is separated from the air pipe outside the reaction kettle, then the kettle cover can be directly taken out from the upper part through the fuel rod air inlet pipe, and finally the fuel assembly can be integrally taken out from the kettle body.
In some embodiments of the present invention, the split flange includes a flange body, a first flange plate and a second flange plate respectively disposed above and below the flange body, the first flange plate and the second flange plate being detachably connected; the flange body is composed of a left split body and a right split body, and a flange center hole is formed at the joint of the two split bodies. Through setting up first ring flange and second ring flange to and controlling two components of a whole that can function independently, can realize the zonulae occludens of outside trachea, kettle cover and the fuel rod intake pipe of reation kettle, can make the three separate again.
In some embodiments of the invention, the fuel assembly further comprises a fuel rod disposed below the fuel rod air intake unit, and a bottom of the fuel rod air intake unit communicates with the fuel rod. High-temperature and high-pressure gas is transmitted to the inside of the fuel rod through the fuel rod gas inlet unit to react a reactor inside the fuel rod.
In some embodiments of the invention, the fuel rod inlet cell further comprises a diverter plate; the bottom of the fuel rod air inlet pipe is provided with an air chamber with a gradually-increased section along the air inlet direction (from top to bottom), and the bottom of the air chamber is communicated with the fuel rods through a plurality of shunt tubes; the flow distribution plate is provided with flow distribution plate small holes and is transversely arranged in the air chamber to divide the air chamber into an upper air chamber and a lower air chamber. Through the arrangement of the air chamber, the flow distribution plate and the flow distribution pipe, high-temperature and high-pressure gas can uniformly enter the fuel rod.
In some embodiments of the present invention, the fuel assembly further includes a plurality of grids for fixedly supporting the fuel rods, each of the grids including a plurality of first elastic bands arranged side by side at intervals and a plurality of second elastic bands arranged side by side at intervals, and the first elastic bands and the second elastic bands are crossed with each other to form a plurality of grids for the fuel rods to penetrate through. The fuel rods are fixed by the elastic grids, so that the contact area between the grids and the fuel rods can be reduced, and the corrosion behavior of the cladding material of the fuel rods in a primary circuit can be better simulated.
In some embodiments of the invention, at least one grid is detachably and fixedly connected with the kettle body. Through carrying out the detachable fixed connection with the framework and the kettle body, the inclination of the fuel assembly can be avoided.
In some embodiments of the invention, the grid detachably and fixedly connected with the kettle body is arranged at the upper end of the fuel rod. Through making the grillage and the cauldron body fixed connection at top, can prevent that fuel assembly atress is uneven and take place to heels when taking off the kettle cover.
In some embodiments of the present invention, the fuel assembly further comprises a fuel assembly base, the fuel assembly base is provided with a plurality of vertical fuel rod slots, and the bottom of each fuel rod slot is provided with a liquid drainage pore penetrating through the fuel assembly base; the bottom of the fuel rod is inserted into the fuel rod slot. Liquid accumulation in the groove can be prevented by arranging the liquid drainage pore at the bottom of the notch of the fuel rod.
In some embodiments of the invention, the fuel assembly base is detachably and fixedly connected with the kettle body.
In some embodiments of the invention, the number of fuel rods is 1 or more than 1.
In some embodiments of the present invention, the number of the fuel rods is 1 or more. By providing a plurality of fuel rods, a control can be provided to study the corrosion behavior of different cladding materials.
In some embodiments of the invention, the kettle cover is further provided with a thermometer tube orifice, a pH meter tube orifice, a sight glass hole, a pressure gauge tube orifice, a safety valve and a lamp hole, which are respectively used for installing a thermometer, a pH meter, a sight glass, a pressure gauge and a lamp, so as to facilitate monitoring or observation of temperature, pH, pressure and the like in the reaction kettle.
Compared with the prior art, the invention has the following beneficial effects:
the invention combines the traditional reaction kettle and the reactor fuel assembly to simulate the working condition of a reactor core, realizes the integral taking out of the reaction kettle cover and the fuel assembly with the air inlet pipe orifice through a split flange, realizes the separation of the external air inlet pipe, the kettle cover and the fuel assembly with the air inlet pipe, and can clean the reaction kettle and replace the shell material in the kettle very conveniently.
The flow distribution plate is arranged above the fuel rod air inlet pipe, the air inlet pipe above the gas flow distribution plate is arranged to be arc-shaped, the gas pressure in the air chamber is further promoted to be even, the gas can uniformly enter the fuel rods at the same time, and the simulation of the real working environment of the fuel rods is facilitated.
The corrosion behaviors of different cladding materials can be contrastively researched by controlling the number of the fuel rods; transmitters for monitoring the environment in the reaction kettle on line, such as temperature, pressure, concentration, flow and the like, are arranged in the reaction kettle to research the service behavior of the cladding material. The fuel rods are fixed by the elastic grids, so that the contact area between the grids and the fuel rods is reduced, and the corrosion behavior of the cladding material in a primary circuit is better simulated.
The reaction kettle has higher separation degree and larger modification space, and can also be used for evaluating the service corrosion performance of the pipe in high-temperature and high-pressure gas and liquid environments in other fields.
Drawings
FIG. 1 is a schematic structural view of a reaction kettle;
FIG. 2 is a top view of a reaction vessel;
FIG. 3 is a schematic structural diagram of a split flange;
FIG. 4 is a schematic structural view of a fuel assembly;
FIG. 5 is a schematic view of the fuel assembly base (enlarged view of portion A in FIG. 1);
FIG. 6 is a partial enlarged view of B in FIG. 1;
FIG. 7 is a schematic structural view of the lattice;
FIG. 8 is a partial enlarged view of C in FIG. 1;
FIG. 9 is a schematic structural view of a fuel rod air inlet cell.
Reference numerals:
a jacket 100, a jacket loop inlet 110, a jacket loop outlet 120, a jacket exhaust 130, a support frame 140, a jacket residue outlet 150;
the reaction kettle comprises a kettle body 200, a primary loop inlet 210, a primary loop outlet 220, a kettle body residue outlet 230 and a kettle body residue outlet flange component 240;
the device comprises a kettle cover 300, bolts 310, a sealing gasket 320, an air inlet 330, a split type flange 331, a flange body 3311, a first flange 3312, a second flange 3313, a flange center hole 3314, a thermometer nozzle 340, a thermometer 3401, a pH meter nozzle 350, a sight glass hole 360, a pressure gauge nozzle 370, a safety valve 380, a lamp hole 390 and a hanging ring 3100;
the fuel assembly comprises a fuel assembly 400, a fuel assembly base 410, a fuel rod notch 4101, a liquid drainage pore 4102, a base extension rod 4103, a fuel rod 420, a grid 430, a grid frame 4301, a first elastic band 4302, a second elastic band 4303, an elastic band clamp 4304, a support rod 4305, a fuel rod air inlet unit 440, a fuel rod air inlet pipe 4401, a diversion plate 4402 and a diversion pipe 4403.
Detailed Description
The technical solution of the present invention is further described below with reference to specific examples.
Referring to fig. 1 and 2, the invention provides a reaction kettle for simulating a dynamic test of a reactor fuel rod cladding material, which comprises a jacket 100, a kettle body 200, a kettle cover 300 and a fuel assembly 400. Wherein, the kettle body 200 is sleeved in the jacket 100; the kettle cover 300 is detachably arranged on the kettle body 200 and can cover the kettle body 200; the fuel assembly 400 is disposed inside the kettle body 200.
Specifically, the jacket 100 may be configured to have a cylindrical shape, and a jacket circuit inlet 110, a jacket circuit outlet 120, and a jacket exhaust 130 are formed in a sidewall of the jacket 100, separately from each other. The outer wall of the jacket 100 is provided with support frames 140, and the number of the support frames 140 may be set to 2 or more than 2, and is preferably uniformly distributed on the outer wall of the jacket 100. The bottom of the jacket 100 is provided with a jacket residue outlet 150.
The kettle body 200 is matched with the jacket 100 in shape, is sleeved in the jacket 100 and is sealed by the jacket 100, and a gap is formed between the kettle body 200 and the jacket 100. The upper edge of the kettle body 200 is provided with two or more kettle body bolt holes, and the kettle body bolt holes are preferably symmetrically and uniformly distributed on the upper edge of the kettle body 200. A primary loop inlet 210 and a primary loop outlet 220 which are separated from each other are arranged on the side wall of the kettle body 200, wherein the primary loop outlet 220 is arranged above the primary loop inlet 210. A primary inlet 210 and a primary outlet 220 are respectively passed through the side walls of the jacket 100. In operation, coolant enters the kettle 200 through a primary inlet 210 and exits the kettle 200 through a primary outlet 220 to form a loop. A kettle residue outlet 230 is formed at the bottom of the kettle body 200, and a kettle residue outlet flange assembly 240 for connecting the bottom of the kettle body 200 and the bottom of the jacket 100 is arranged in the kettle residue outlet 230.
The kettle cover 300 is arranged on the kettle body 200, two or more kettle cover bolt holes are arranged on the lower edge of the kettle cover, and the size and the position of the kettle cover bolt holes correspond to those of the kettle cover bolt holes. After the kettle cover bolt holes and the kettle body bolt holes are closed, the kettle cover 300 and the kettle body 200 are tightly fixed through a bolt 310, and the kettle cover 300 is sealed and covered on the kettle body 200. In order to improve the sealing performance between the kettle cover 300 and the kettle body 200, the bolt 310 can be used in cooperation with a matching sealing gasket 320. It should be noted that, in addition to the detachable connection between the kettle cover 300 and the kettle body 200 by the bolts 310, the kettle cover 300 may be used to cover the kettle body 200 in other manners, for example, the kettle cover 300 may be rotatably connected to the kettle body 200 by screws, and the kettle body bolt holes, the kettle cover bolt holes and the bolts 310 may not be provided at this time.
The kettle cover 300 is provided with a gas inlet 330, a thermometer tube opening 340, a pH meter tube opening 350, a sight glass hole 360, a pressure gauge tube opening 370, a safety valve 380 and a lamp hole 390 which are separated from each other, wherein the gas inlet 330 is positioned at the middle position of the top of the kettle cover 300, and the thermometer tube opening 340, the pH meter tube opening 350, the sight glass hole 360, the pressure gauge tube opening 370, the safety valve 380 and the lamp hole 390 can be arranged around the first gas inlet 330 in a surrounding manner.
The air inlet 330 is provided with a detachable split flange 331. Referring to fig. 3, the divided flange 331 includes a flange body 3311, a first flange 3312 and a second flange 3313 which are respectively fixed by bolts and disposed above and below the flange body 3311. The flange body 3311 has a flange center hole 3314 formed in a middle portion thereof, and the flange body 3311 is formed by a left and a right split bodies fixed by bolts, and the flange center hole 3314 is formed at a joint of the two split bodies.
The thermometer tube port 340, the pH meter tube port 350, the sight glass hole 360, the pressure gauge tube port 370 and the lamp hole 390 are respectively used for installing a thermometer 3401, a pH meter, a sight glass, a pressure gauge and a lamp, so that the temperature, the pH, the pressure and the like in the reaction kettle can be conveniently monitored or observed.
Still fixedly on the kettle cover 300 is provided with rings 3100 to take kettle cover 300. Preferably, the number of the hanging rings 3100 is set to 2 or more, and is preferably uniformly distributed on the kettle cover 300.
Referring to fig. 1, 4, and 5, a fuel assembly 400 includes a fuel assembly mount 410, fuel rods 420, grids 430, and fuel rod air inlet cells 440. The fuel assembly base 410 is provided with a plurality of vertical fuel rod notches 4101, and the bottom of each fuel rod notch 4101 is provided with a liquid discharge pore 4102 penetrating through the fuel assembly base 410. Meanwhile, the side wall of the fuel assembly mount 410 is provided with a plurality of mount extension bars 4103. The base extension rods 4103 are fixedly coupled to the bottom or a sidewall near the bottom of the vessel 200 by bolts, thereby fixing the fuel assembly 400 to the bottom of the vessel 200.
The number of the fuel rods 420 may be set to be several, for example, 13, or other numbers according to actual needs. A plurality of fuel rods 420 are arranged at intervals and fixed in a bundle by grids 430 and the bottom of each fuel rod 420 is inserted into a fuel rod notch 4101 of the fuel assembly mount 410.
Referring to fig. 6, 7 and 8, the grids 430 are elastic location grids, and play a role of fixing and supporting the fuel rods 420, and the number thereof can be set according to actual needs. Preferably, the number of the grids 430 is at least 2 or more than 2, and at least one grid 430 is provided at each of the upper and lower ends of the fuel rod 420. Each frame 430 includes a frame 4301, a plurality of first elastic straps 4302 spaced side-by-side, and a plurality of second elastic straps 4303 spaced side-by-side. The lattice frame 4301 is arranged on the outer wall of the bundled fuel rods 420, the first elastic band 4302 and the second elastic band 4303 are arranged in a space surrounded by the lattice frame 4301, the first elastic band 4302 and the second elastic band 4303 are intersected with each other to form a plurality of grids for the fuel rods 420 to penetrate, and the ends of the first elastic band 4302 and the second elastic band 4303 are fixed to the outer side of the lattice frame 4301 through an elastic band clamp 4304 respectively. In addition, the grids 430 at the top end of the fuel rod 420 are also fixedly connected with the kettle body 200 through bolts by a support rod 4305.
The fuel rod inlet unit 440 is disposed above the fuel rods 420 and communicates with each fuel rod 420 for introducing high-temperature and high-pressure gas into the fuel rods 420.
Specifically, referring to fig. 9, the fuel rod air inlet unit 440 includes a fuel rod air inlet tube 4401, and a flow dividing plate 4402. Wherein the diameter of fuel rod intake pipe 4401 is less than the air inlet 330 that sets up on the kettle cover 300 to pass air inlet 330, and fuel rod intake pipe 4401 is connected with the second ring flange 3313 of the split type flange 331 in the kettle cover 300, then is connected with the outside breather pipe of reation kettle through the first ring flange 3312 of split type flange 321, thereby makes outside gas entering fuel rod intake pipe 4401. The bottom of the fuel rod inlet tube 4401 is an arc-shaped tube. Specifically, the bottom of the fuel rod air inlet pipe 4401 is provided with an air chamber with a gradually increasing section along the air inlet direction (from top to bottom), and the bottom of the air chamber is communicated with the fuel rods 420 through a plurality of shunt pipes 4403. The flow distribution plate 4402 is transversely arranged in the air chamber, the air chamber is divided into an upper air chamber and a lower air chamber, the flow distribution plate 4402 is provided with a plurality of flow distribution plate small holes, and the diameter of each flow distribution plate small hole can be set to be about one fourth of the flow distribution plate 4403. The gas enters the air chamber through the fuel rod gas inlet pipe 4401, primarily realizes gas aggregation in the upper air chamber, then more uniformly enters the lower air chamber below the splitter plate 4402 through a plurality of splitter plate small holes, and then enters the fuel rod 420 through the splitter tube 4403.
The process of simulating the dynamic test of the reactor fuel rod cladding material by adopting the reaction kettle comprises the following steps: with the outside breather pipe fixed connection in the first ring flange 3312 of split type flange 331 that is used for carrying high temperature high-pressure gas of reation kettle to make high temperature high-pressure gas get into fuel rod intake pipe 4401 through the flange centre bore 3314 of split type flange 331, then go into the air chamber, tentatively realize gaseous gathering in the air chamber of top, get into the below air chamber of flow distribution plate 4402 below more evenly through a plurality of flow distribution plate apertures afterwards, then get into fuel rod 420 through shunt tubes 4403, make the inside nuclear material of fuel rod 420 carry out the reactor reaction. Meanwhile, a coolant is introduced into the kettle body 200 through a primary loop inlet 210 in the kettle body 200, and the coolant flows out of the kettle body through a primary loop outlet 220 after filling the kettle body 200. Meanwhile, a fluid may be introduced into the jacket 100 through the jacket circuit inlet 110 and the jacket circuit outlet 120 to control the temperature of the kettle body 200.
During the dynamic test, the cladding of the fuel rod 420 is oxidized to form an oxide layer, the oxide layer is dissolved into the coolant in the kettle body 200 and is deposited to form residues, and the residues are discharged from the reaction kettle through the kettle body residue outlet 230 at the bottom of the kettle body 200. Meanwhile, the residue formed by the reaction in the jacket 100 is discharged out of the reaction vessel through the jacket residue outlet 150. During the test, the temperature, pH, pressure, etc. in the reaction kettle are monitored or observed by a thermometer 3401, a pH meter, a sight glass, a pressure gauge, a lamp, etc.
After the test is completed, the introduction of high-temperature and high-pressure gas is stopped, bolts used for fixing the first flange plate 3312 and the second flange plate 3313 in the split type flange 331 are removed, and the first flange plate 3312 and the second flange plate 3313 are separated from the flange body 3311, so that the vent pipe used for conveying the high-temperature and high-pressure gas outside the reaction kettle is removed, and the fuel rod gas inlet pipe 4401 is separated from the split type flange 331. Then, the bolts for fixing the left and right divided bodies of the flange body 3311 are removed to separate the two divided bodies, and the two divided bodies are taken out from the left and right sides. Then, the bolts 310 for fixing the vessel cover 300 to the vessel body 200 are removed, and the vessel cover 300 is separated from the vessel body 200. Since the diameter of the air inlet 330 in the kettle cover 300 is larger than the diameter of the fuel rod air inlet tube 4401, the kettle cover 300 can be directly taken out from above through the fuel rod air inlet tube 4401. Finally, the bolts for fixing the grillwork 430 and the kettle body 200 are removed, so that the fuel assembly can be integrally taken out.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (8)
1. A reaction kettle is characterized in that: the method comprises the following steps:
a kettle body (200);
a primary circuit inlet (210) and a primary circuit outlet (220) which are separated from each other are arranged on the side wall of the kettle body 200, wherein the primary circuit outlet (220) is arranged above the primary circuit inlet (210);
the kettle cover (300), the kettle cover (300) is detachably covered on the kettle body (200); the top of the kettle cover is provided with an air inlet (330), and the air inlet (330) is provided with a detachable split type flange (331);
the fuel assembly (400) is arranged in the kettle body (200) and comprises fuel rod air inlet units (440), and the fuel rod air inlet units (440) comprise fuel rod air inlet pipes (4401); the diameter of the fuel rod air inlet pipe (4401) is smaller than that of the air inlet (330), the fuel rod air inlet pipe penetrates through the air inlet (330), and the fuel rod air inlet pipe is connected with an air pipe outside the reaction kettle through the split type flange (331);
the fuel assembly (400) further comprises a fuel rod (420), the fuel rod (420) is arranged below the fuel rod air inlet unit (440), and the bottom of the fuel rod air inlet unit (440) is communicated with the fuel rod (420); the fuel assembly (400) further comprises a plurality of grids (430) for fixedly supporting the fuel rods (420), each grid (430) comprises a plurality of first elastic belts (4302) arranged side by side at intervals and a plurality of second elastic belts (4303) arranged side by side at intervals, and the first elastic belts (4302) and the second elastic belts (4303) are crossed with each other to form a plurality of grids for the fuel rods (420) to penetrate through.
2. The reactor of claim 1, wherein: the split type flange (331) comprises a flange body (3311), a first flange plate (3312) and a second flange plate (3313) which are respectively arranged above and below the flange body (3311), and the first flange plate (3312) and the second flange plate (3313) are detachably connected; the flange body (3311) is composed of a left and a right split bodies, and a flange center hole (3314) is formed at the joint of the two split bodies.
3. The reactor of claim 1, wherein: the fuel rod air inlet unit (440) further comprises a splitter plate (4402); the bottom of the fuel rod air inlet pipe (4401) is provided with an air chamber with the section gradually increasing along the air inlet direction, and the bottom of the air chamber is communicated with the fuel rods (420) through a plurality of flow dividing pipes (4403); the flow distribution plate (4402) is provided with a flow distribution plate small hole, is transversely arranged in the air chamber, and divides the air chamber into an upper air chamber and a lower air chamber.
4. The reactor of claim 1, wherein: at least one grid (430) is detachably and fixedly connected with the kettle body (200).
5. The reactor of claim 1, wherein: and a grid (430) detachably and fixedly connected with the kettle body (200) is arranged at the upper end of the fuel rod (420).
6. The reactor of claim 4, wherein: the fuel assembly (400) further comprises a fuel assembly base (410), the fuel assembly base (410) is provided with a plurality of vertical fuel rod notches (4101), and the bottom of each fuel rod notch (4101) is provided with a liquid drainage pore (4102) penetrating through the fuel assembly base (410); the bottom of the fuel rod (420) is inserted into the fuel rod slot (4101).
7. The reactor of claim 6, wherein: the fuel assembly base (410) is detachably and fixedly connected with the kettle body (200).
8. The reactor of claim 7, wherein: the number of the fuel rods (420) is 1 or more than 1.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110333435.8A CN113096840B (en) | 2021-03-29 | 2021-03-29 | Reaction kettle for simulating dynamic test of reactor fuel rod cladding material |
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| CN202110333435.8A CN113096840B (en) | 2021-03-29 | 2021-03-29 | Reaction kettle for simulating dynamic test of reactor fuel rod cladding material |
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| CN113658728B (en) * | 2021-07-30 | 2023-08-15 | 中山大学 | Test device for simulating dynamic scaling of secondary side of heat exchange tube of pressurized water reactor steam generator |
| CN114999688B (en) * | 2022-06-14 | 2024-04-26 | 中国核动力研究设计院 | Scaling simulation fuel assembly |
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| JP2001194479A (en) * | 2000-01-14 | 2001-07-19 | Nuclear Fuel Ind Ltd | Spacer of fuel assembly for boiling water reactor and fuel assembly using it for boiling water reactor |
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