CN109859869A - A kind of irradiation devices suitable for single fuel element transient test - Google Patents
A kind of irradiation devices suitable for single fuel element transient test Download PDFInfo
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- CN109859869A CN109859869A CN201910180304.3A CN201910180304A CN109859869A CN 109859869 A CN109859869 A CN 109859869A CN 201910180304 A CN201910180304 A CN 201910180304A CN 109859869 A CN109859869 A CN 109859869A
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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
- Y02E30/00—Energy generation of nuclear origin
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Abstract
The invention discloses a kind of irradiation devices suitable for single fuel element transient test, including fixed screen work component and guiding tube assembly, further include pressure tube assembly；It further include for the He-3 screen assembly on the downside of pressure tube assembly to be arranged in, the He-3 screen assembly includes tubular He-3 screen, and the barrel of He-3 screen is hollow structure, and the hollow structure is the axis tubular structure coaxial with He-3 screen；The entrance sleeve and discharge connection being connected with the hollow structure are additionally provided on the He-3 screen；It further include element cooling water component, the element cooling water component includes element cooling water runner, the element cooling water runner includes the functional requirement that the pressure tube assembly lower end inside region irradiation devices can not only meet single fuel element transient test, while structure is simple, implementation cost is low and safety indexes controllability is good.
Description
Technical field
The present invention relates to irradiation technique fields, more particularly to a kind of irradiation suitable for single fuel element transient test
Device.
Background technique
The burnup for improving fuel element can bring huge economic benefit to in-service nuclear power station, research and develop in New-type fuel element
It often will appear that involucrum seriously corroded, pellet swelling is serious, fission gas release causes the wind such as hypertonia in involucrum in the process
Danger, the safety and reliability of fuel element can not ensure.
And the desirable route for studying fuel element safety under transient condition is exactly to carry out simulating various winks on test reactor
The test of state operating condition obtains the data of fuel behaviour, develops physical model, and analysis causes element integrality by the original destroyed
Cause, thus optimal design parameter, it is ensured that the safety and reliability of fuel element.In the prior art, for for the studies above
Irradiation devices, it is desirable that the device can not only bear high temperature and pressure strong neutron field irradiation, and can be realized fuel element power
Transient changing, while requiring irradiation devices that there is reliable controllability and safety.And in practical operation, meet above-mentioned function
Energy index and safety indexes enforcement difficulty are big, therefore research mode in the prior art is only grasped by a few countries.
Summary of the invention
There is a problem of that enforcement difficulty is big for the device for single fuel element transient test set forth above, this hair
Bright to provide a kind of irradiation devices suitable for single fuel element transient test, which can not only meet single combustion
Expect the functional requirement of element transient test, while structure is simple, implementation cost is low and safety indexes controllability is good.
The technological means of this programme is as follows, a kind of irradiation devices suitable for single fuel element transient test, including solid
Fix frame component and guiding tube assembly, further includes pressure tube assembly, and the fixed screen work component is mounted in pressure tube assembly, and
Pressure tube assembly provides pressure boundary for the fuel element being fixed on fixed screen work component；It further include for being arranged in pressure pipe
He-3 screen assembly on the downside of component, the He-3 screen assembly includes tubular He-3 screen, and the barrel of He-3 screen is hollow knot
Structure, the hollow structure are the axis tubular structure coaxial with He-3 screen；
The inner wall of the He-3 screen surrounds the centre bore of He-3 screen, and pressure tube assembly lower end is partially or fully located at institute
It states in centre bore, and pressure tube assembly and He-3 screen are coaxial；
The entrance sleeve and discharge connection being connected with the hollow structure are additionally provided on the He-3 screen；
It further include element cooling water component, the element cooling water component includes element cooling water runner, and the element is cold
But water flow passage includes pressure tube assembly lower end inside region.
It in the prior art, is using large-scale real for the transient test of fuel element, such as the U.S., country, Belgium
The mode of heap is tested to carry out the fuel behaviour data acquisition of single fuel element: fuel element to be tested be in experimental reactor wherein
A piece fuel element is also matched with many fuel elements for changing fuel element environment to be tested in experimental reactor, such as passes through
Matched many fuel elements are adjusted, to achieve the purpose that change fuel element power to be tested.The above prior art not only has
The problem for having experimental reactor setup cost high, simultaneously because being related to many fuel elements and entire experimental reactor volume and power are equal
It is larger, therefore existing experimental reactor also has control or runs the big problem of difficulty.
The fixed screen work component is used to install fuel element to be tested, and pressure tube assembly is that fuel element to be tested mentions
For pressure boundary, so that can work under specified pressure environment to lab fuel element；It is described in the He-3 screen assembly
Hollow structure is He-3 gas held space, this programme using He-3 gas can absorbing reaction heap dissipate incoming neutron and send out
The characteristic of raw nuclear physics reaction: being taken over by the interface and discharge connection, after He-3 gas pressure changes in hollow structure
He-3 gas density changes correspondingly, and He-3 gas changes correspondingly neutron absorption cross-section in hollow structure after gas density changes,
The number of neutrons for being enable to participate in fuel element fission reaction to be tested changes, and the change of number of neutrons quantity causes to join
The number of neutrons that fission reaction occurs with fuel element changes, and then realizes the change of fuel element power to be tested.
In the present solution, due to including the He-3 screen assembly, while the He-3 screen assembly can be by controlling in thereon
The pressure of He-3 gas achievees the purpose that change fuel element power to be tested in hollow structure, therefore is directed to experimental reactor, in experimental reactor
Overall power is constant or only in the case where a small range changes, can easily by controlling the pressure of the He-3 gas,
It realizes the transient power adjustment of fuel element to be tested, compared to the prior art, fuel element to be tested is realized using this programme
Transient power adjustment be not only easy to realize, and corresponding construction is simple, while weak to the changed power dependence of experimental reactor, therefore should
Irradiation devices can not only meet the functional requirement of single fuel element transient test, at the same structure is simple, implementation cost is low and
Safety indexes controllability is good.
Meanwhile being set as including the pressure tube assembly and element cooling water component, so that fuel to be tested in the present apparatus
Element can not only work under different pressure environments, simultaneously because the temperature of element cooling water in element cooling water component,
Flow etc. reflects the power of fuel element to be tested, therefore uses this programme, can be by reflection environmental pressure, reflection environment temperature, function
Any one or a few persons in rate, element cooling water flow etc. obtains under various operating conditions or service condition as definite value or variate
Under fuel element to be tested performance parameter or behavioral data.
Further technical solution are as follows:
Tritium substance can be generated during being neutron interaction due to He-3 gas, structure of the substance to the present apparatus
For be harmful substance, such as material embrittlement is caused, simultaneously because the substance has the characteristics that penetrability is strong, to avoid or subtracting
Small tritium is influenced caused by the present apparatus, setting are as follows: coating is additionally provided on the wall surface of the hollow structure, the coating is thickness
For 2~2.5 μm of AL2O3Coating.Using this programme, the AL2O3Coating is aluminum oxide shielded layer, above three oxidation
Two aluminium thickness parameters can be realized: so that the slip of tritium is less than 1 × 10-7Pa.m3/ s, it is ensured that He-3 is generated by nuclear physics reflection
Tritium will not cause damages to the present apparatus.
A large amount of heat can be also discharged during being neutron interaction due to He-3, to avoid heat affecting member herein
The cooling water assembly of part leads to the accuracy for influencing experimental data and protection He-3 screen assembly, setting are as follows: further include for cooling down
State the supplement heat rejecter water assembly of He-3 screen assembly.
It further include inner sleeve tube assembly as the specific implementation of supplement heat rejecter water assembly, under the inner sleeve tube assembly is
End is provided with the tubular structure of end socket, and the lower end of pressure tube assembly is embedded in inner sleeve tube assembly, and He-3 screen assembly is located at pressure pipe
In gap between component outer wall and inner sleeve tube assembly inner wall；
Gap between pressure tube assembly outer wall and inner sleeve tube assembly inner wall is the cooling water of the supplement heat rejecter water assembly
Circulation passage.In the present solution, the inner sleeve tube assembly is to be used for as this irradiation devices and extraneous pressure edge, while conduct
For cooling down the edge of the supplement heat rejecter water of He-3 screen assembly.This programme in fact provides a kind of specifically setting for He-3 screen assembly
Form is set, using the program, not only may make this irradiation devices reliable performance, while simple and compact for structure, element usage is high.
To enable supplement heat rejecter water assembly reliably to cool down He-3 screen assembly, setting are as follows: further include for realizing limit
Determine first baffle means in flow of cooling water path in supplement heat rejecter water assembly, first baffle means limit the stream of cooling water
Dynamic path is any one in following manner:
It is flowed by He-3 screen close to the outside of the side of pressure tube assembly upper end, through He-3 screen close to pressure tube assembly lower end
Side baffling to He-3 screen centre bore, then by centre bore close to the outflow of the side of pressure tube assembly upper end；
It is flowed by He-3 screen centre bore close to the side of pressure tube assembly upper end, through He-3 screen centre bore close to pressure pipe group
The side baffling of part lower end is flowed out to the outside of He-3 screen, then by He-3 screen close to the side of pressure tube assembly upper end.Using this
Scheme, for He-3 screen, in inlet and outlet the two of supplement heat rejecter water, any one is He-3 screen in pressure tube assembly
The outside at end, another one are the aperture side in center hole, in this way, may make supplement heat rejecter water and He-3 screen with active cooling surface product
Big feature.While those skilled in the art are used as, it is realizing in the present solution, being obstructed using the following provided isolation ring that passes through
The inlet and outlet of supplement heat rejecter water, the flow path for draining about beam fluid by shunt cylinder.If the shape of He-3 screen is in cylinder
Shape structure, He-3 screen are socketed on the outer wall of shunt cylinder by centre bore, and the hole wall each point of the centre bore and shunt cylinder
The equal reliable contacts of outer wall, the cooling medium in centre bore on the inside of shunt cylinder by flowing through.
To enable element cooling water component reliably to export the heat caused by test fuel element, it is arranged are as follows:
The element cooling water component further includes for realizing limiting second of element cooling water flow path in element cooling water component
Baffling component, the second baffling component include shunt cylinder and the isolation ring for being mounted on shunt cylinder upper end, the isolation ring conduct
The connector of shunt cylinder and pressure tube assembly inner wall, the shunt cylinder is inserted into pressure tube assembly and the lower end of shunt cylinder extends to
The downside of pressure pipe component internal, and the isolation ring is upward as gap axis between drum outer wall and pressure tube assembly inner wall is shunted
Isolation board, element cooling water component includes the entrance sleeve and discharge connection for being both connected to pressure tube assembly；
On the axis direction of pressure tube assembly, both the entrance sleeve and discharge connection are located at isolation ring not
Ipsilateral, the guiding tube assembly is mounted in the shunt cylinder.In the present solution, by the isolation ring, so that by entrance sleeve
The cooling medium for flowing into the present apparatus only can be along shunt cylinder, and the gap between shunt cylinder lower end and pressure tube assembly is turned back
Afterwards, that is, after flowing through fuel element region, then the present apparatus drawn by discharge connection.
For the accuracy of the gained test data of the raising present apparatus, setting are as follows: it further include heat-insulation assembly, the pressure pipe group
Part is wrapped in the heat-insulation assembly, and the heat-insulation assembly is heat-insulated for realizing pressure tube assembly and outside.In the present solution, pressure
The heat release region that solenoid component inside region is equivalent to as fuel element, the heat-insulation assembly are used to wrap up the heat release area
Domain, to avoid or reduce the heat release region and extraneous heat exchange.
As noted previously, as He-3 screen can generate heat at work, test knot is made as a kind of avoidable He-3 screen
At the concrete scheme of influence, setting are as follows: the He-3 screen is located at the outside of heat-insulation assembly.
As the specific implementation of heat-insulation assembly, setting are as follows: the heat-insulation assembly includes being set in outside pressure tube assembly
The sleeve of side has the gap for accommodating gas insulation medium between the inner wall of the sleeve and the outer wall of pressure tube assembly,
The gap for accommodating gas insulation medium is enclosure space, further includes with described for accommodating gas insulation medium
The gas that connects of gap draw adapter tube.Present solution provides a kind of specific adiabatic schemes, i.e., using gas as insulating medium.
Using this programme other than realizing insulation, mineral wool insulating medium is such as used compared to other, this programme considers absolutely
Thermal medium works under radiation environment, has the characteristics that good thermo-insulation properties can be kept for a long time using this programme；This programme simultaneously
The corresponding site for considering the present apparatus is pressure vessel, and the gap for being provided for accommodating gas insulation medium is empty for closing
Between, in this way, can reflect the leak case of the present apparatus, according to the humidity of gas in above-mentioned enclosure space in specific use with reality
Now in time or as early as possible discovery present apparatus leakage failure at work or crackle, conducive to the reliability and safety of present apparatus work
Property.
As those skilled in the art, since guiding tube assembly needs to be vertically arranged in specific use, to make this dress
Cooling water can be filled up in space to improve the heat transfer efficiency of cooling water where setting fuel element at work, be conducive to present apparatus institute
It obtains the timeliness of data result or improves power monitoring response speed, to achieve the purpose that improve present apparatus data result reliability
With the safety for improving the present apparatus, setting are as follows: the upper end of the guiding tube assembly is additionally provided with exhaust pipe.
It is related to multiple boundaries in above scheme, if fuel element local environment needs to be set to an enclosed environment,
The enclosed environment is that a part in flow of cooling water path, heat-insulation assembly need to be set to an envelope in element cooling water component
Closed loop border such as not will receive extraneous interference using nitrogen, He-3 screen assembly needs to be set to one so that its interior gas
The pressure adjustable of He-3 gas is in closed environment He-3 screen assembly to change the power of fuel element or avoid He-3 spilling wave
Expense etc., supplement heat rejecter water assembly be preferably provided with as a closed environment so that the fluid behaviour of supplement heat rejecter water be easier to by
Reasonable control is to achieve the purpose that reliably to cool down He-3 screen assembly.Above each environment is mutually isolated due to needing, specific real
Shi Shi is preferably arranged to include multiple mutually nested casings, the gap between casing as the above required closed environment,
If pressure tube assembly is in most inner side, then fuel element institute can be obtained using plug in its open end when pressure tube assembly is blind pipe
Locate enclosed environment；And between casing and casing, to enable the gap between casing to close, one end tool is can be used in casing
There is the blind pipe of end socket, the open end of the blind pipe in outside can be tightly connected or be passed through with the blind pipe on the inside of it by connecting flange
Welding is tightly connected to obtain corresponding enclosure space with the blind pipe on the inside of it.
The invention has the following advantages:
In the present solution, due to including the He-3 screen assembly, while the He-3 screen assembly can be by controlling in thereon
The pressure of He-3 gas achievees the purpose that change fuel element power to be tested in hollow structure, therefore is directed to experimental reactor, in experimental reactor
Overall power is constant or only in the case where a small range changes, can easily by controlling the pressure of the He-3 gas,
It realizes the transient power adjustment of fuel element to be tested, compared to the prior art, fuel element to be tested is realized using this programme
Transient power adjustment be not only easy to realize, and corresponding construction is simple, while weak to the changed power dependence of experimental reactor, therefore should
Irradiation devices can not only meet the functional requirement of single fuel element transient test, at the same structure is simple, implementation cost is low and
Safety indexes controllability is good.
Meanwhile being set as including the pressure tube assembly and element cooling water component, so that fuel to be tested in the present apparatus
Element can not only work under different pressure environments, simultaneously because the temperature of element cooling water in element cooling water component,
Flow etc. reflects the power of fuel element to be tested, therefore uses this programme, can be by reflection environmental pressure, reflection environment temperature, function
Any one or a few persons in rate, element cooling water flow etc. obtains under various operating conditions or service condition as definite value or variate
Under fuel element to be tested performance parameter or behavioral data.
Detailed description of the invention
Fig. 1 is a kind of irradiation devices one specific implementation suitable for single fuel element transient test of the present invention
The structural schematic diagram of example, which is installation diagram, and the schematic diagram is that laid-flat status turns counterclockwise the schematic diagram after 90 °；
Fig. 2 to Figure 10 provides the part drawing of each component or part in installation diagram by Fig. 1, is respectively as follows:
Fig. 2 is the structural schematic diagram of inner sleeve tube assembly；
Fig. 3 is the structural schematic diagram of He-3 screen assembly；
Fig. 4 is the structural schematic diagram of supplement heat rejecter water assembly；
Fig. 5 is the structural schematic diagram of heat-insulation assembly；
Fig. 6 is the structural schematic diagram of transition tube assembly；
Fig. 7 is the structural schematic diagram of pressure tube assembly；
Fig. 8 is the structural schematic diagram of spherical lower contact component；
Fig. 9 is the structural schematic diagram of the second baffling component；
Figure 10 is the structural schematic diagram for being oriented to tube assembly.
Appended drawing reference in figure is respectively as follows: 1, inner sleeve tube assembly；2, supplement heat rejecter water assembly；3, He-3 screen assembly；4, absolutely
Hot component；5, transition tube assembly；6, pressure tube assembly；7, the second baffling component；8, clamping sleeve；9, big spring；10, flat band method
It is blue；11, it is oriented to tube assembly；12, fixed screen work component；13, inner sleeve pipe flange；14, inner sleeve；15, inner sleeve lower head；16,
Supplement heat rejecter water law is blue；17, connecting tube；18, connector；19, auxiliary water loop adapter tube；20, water inlet flange；21, upper support tube；
22, interior screen；23, external screen；24, lower support tube；25, helium screen assembly supporting block；26, it is insulated pipe flange；27, shell ring；28, it is connect under
Head；29, coupling tube；30, upper end；31, major loop is taken over；32, spacer flanger component；33, pressure pipe shell ring；34, under spherical
Joint assembly；35, spherical lower contact；36, it is supported under spring；37, support spring；38, it is supported on spring；39, locating piece；40,
Hoisting head；41, isocon；42, central straight pipe；43, connecting flange；44, guide rod；45, guide head.
Specific embodiment
Below with reference to embodiment, the present invention is described in further detail, but structure of the invention be not limited only to it is following
Embodiment.
Embodiment 1:
As shown in Figures 1 to 10, a kind of irradiation devices suitable for single fuel element transient test, including fixed screen work
Component 12 and guiding tube assembly 11, further include pressure tube assembly 6, and the fixed screen work component 12 is mounted in pressure tube assembly 6,
And pressure tube assembly 6 provides pressure boundary for the fuel element being fixed on fixed screen work component 12；It further include for being arranged
The He-3 screen assembly 3 of 6 downside of pressure tube assembly, the He-3 screen assembly 3 include tubular He-3 screen, and the barrel of He-3 screen
For hollow structure, the hollow structure is the axis tubular structure coaxial with He-3 screen；
The inner wall of the He-3 screen surrounds the centre bore of He-3 screen, and 6 lower end of pressure tube assembly is partially or fully located at
In the centre bore, and pressure tube assembly 6 and He-3 screen is coaxial；
The entrance sleeve and discharge connection being connected with the hollow structure are additionally provided on the He-3 screen；
It further include element cooling water component, the element cooling water component includes element cooling water runner, and the element is cold
But water flow passage includes 6 lower end inside region of pressure tube assembly.
It in the prior art, is using large-scale real for the transient test of fuel element, such as the U.S., country, Belgium
The mode of heap is tested to carry out the fuel behaviour data acquisition of single fuel element: fuel element to be tested be in experimental reactor wherein
A piece fuel element is also matched with many fuel elements for changing fuel element environment to be tested in experimental reactor, such as passes through
Matched many fuel elements are adjusted, to achieve the purpose that change fuel element power to be tested.The above prior art not only has
The problem for having experimental reactor setup cost high, simultaneously because being related to many fuel elements and entire experimental reactor volume and power are equal
It is larger, therefore existing experimental reactor also has control or runs the big problem of difficulty.
For the fixed screen work component 12 i.e. for installing fuel element to be tested, pressure tube assembly 6 is fuel member to be tested
Part provides pressure boundary, so that can work under specified pressure environment to lab fuel element；The He-3 screen assembly 3
In, the hollow structure is He-3 gas held space, this programme using He-3 gas can the scattering of absorbing reaction heap come
Neutron the characteristic of nuclear physics reaction occurs: taken over by the interface and discharge connection, the He-3 gas pressure in hollow structure
He-3 gas density changes correspondingly after power changes, gas density change after in hollow structure He-3 gas to neutron absorption cross-section with
Change, the number of neutrons for being enable to participate in fuel element fission reaction to be tested changes, and number of neutrons quantity changes
The number of neutrons that becoming causes participation fuel element that fission reaction occurs changes, and then realizes fuel element power to be tested
Change.
In the present solution, due to including the He-3 screen assembly 3, while the He-3 screen assembly 3 can be by controlling thereon
The pressure of He-3 gas achievees the purpose that change fuel element power to be tested in hollow structure, therefore is directed to experimental reactor, is testing
Heap overall power is constant or only in the case where a small range changes, can be easily by controlling the pressure of the He-3 gas
Power realizes the transient power adjustment of fuel element to be tested, compared to the prior art, realizes fuel member to be tested using this programme
The transient power adjustment of part is not only easy to realize, and corresponding construction is simple, while weak to the changed power dependence of experimental reactor, therefore
The irradiation devices can not only meet the functional requirement of single fuel element transient test, while structure is simple, implementation cost is low
And safety indexes controllability is good.
Meanwhile being set as including the pressure tube assembly 6 and element cooling water component, so that fuel to be tested in the present apparatus
Element can not only work under different pressure environments, simultaneously because the temperature of element cooling water in element cooling water component,
Flow etc. reflects the power of fuel element to be tested, therefore uses this programme, can be by reflection environmental pressure, reflection environment temperature, function
Any one or a few persons in rate, element cooling water flow etc. obtains under various operating conditions or service condition as definite value or variate
Under fuel element to be tested performance parameter or behavioral data.
Embodiment 2:
As shown in Figures 1 to 10, the present embodiment is further qualified on the basis of embodiment 1:
Tritium substance can be generated during being neutron interaction due to He-3 gas, structure of the substance to the present apparatus
For be harmful substance, such as material embrittlement is caused, simultaneously because the substance has the characteristics that penetrability is strong, to avoid or subtracting
Small tritium is influenced caused by the present apparatus, setting are as follows: coating is additionally provided on the wall surface of the hollow structure, the coating is thickness
For 2~2.5 μm of AL2O3Coating.Using this programme, the AL2O3Coating is aluminum oxide shielded layer, above three oxidation
Two aluminium thickness parameters can be realized: so that the slip of tritium is less than 1 × 10-7Pa.m3/ s, it is ensured that He-3 is generated by nuclear physics reflection
Tritium will not cause damages to the present apparatus.
A large amount of heat can be also discharged during being neutron interaction due to He-3, to avoid heat affecting member herein
The cooling water assembly of part leads to the accuracy for influencing experimental data and protection He-3 screen assembly 3, setting are as follows: further include for cooling down
State the supplement heat rejecter water assembly 2 of He-3 screen assembly 3.
It further include inner sleeve tube assembly 1 as the specific implementation of supplement heat rejecter water assembly 2, the inner sleeve tube assembly 1 is
Lower end is provided with the tubular structure of end socket, and the lower end of pressure tube assembly 6 is embedded in inner sleeve tube assembly 1, and He-3 screen assembly 3 is located at pressure
In gap between 1 inner wall of 6 outer wall of solenoid component and inner sleeve tube assembly；
Gap between 1 inner wall of 6 outer wall of pressure tube assembly and inner sleeve tube assembly is the cooling of the supplement heat rejecter water assembly 2
Water flow circulation passage.In the present solution, the inner sleeve tube assembly 1 is for the pressure edge as this irradiation devices and the external world, simultaneously
Edge as the supplement heat rejecter water for cooling down He-3 screen assembly 3.This programme in fact provides a kind of He-3 screen assembly 3
Specific setting form not only may make this irradiation devices reliable performance, while simple and compact for structure using the program, component benefit
With rate height.
For enable supplement heat rejecter water assembly 2 reliably cool down He-3 screen assembly 3, setting are as follows: further include for realizing
First baffle means in flow of cooling water path in supplement heat rejecter water assembly 2 are limited, first baffle means limit cooling water
Flow path be following manner in any one:
It is flowed by He-3 screen close to the outside of the side of 6 upper end of pressure tube assembly, through He-3 screen under pressure tube assembly 6
The side baffling at end to He-3 screen centre bore, then by centre bore close to the outflow of the side of 6 upper end of pressure tube assembly；
It is flowed by He-3 screen centre bore close to the side of 6 upper end of pressure tube assembly, through He-3 screen centre bore close to pressure pipe
The side baffling of 6 lower end of component is flowed out to the outside of He-3 screen, then by He-3 screen close to the side of 6 upper end of pressure tube assembly.It adopts
With this programme, for He-3 screen, in inlet and outlet the two of supplement heat rejecter water, any one is He-3 screen close to pressure pipe group
The outside of 6 upper end of part, another one are the aperture side in center hole, in this way, it is effectively cold to may make that supplement heat rejecter water and He-3 screen have
But the big feature of area.While those skilled in the art are used as, it is realizing in the present solution, passing through isolation using provided as follows
Ring obstructs the inlet and outlet of supplement heat rejecter water, the flow path for draining about beam fluid by shunt cylinder.Outside He-3 screen
Shape is cylindrical in shape structure, and He-3 screen is socketed on the outer wall of shunt cylinder by centre bore, and the hole wall each point of the centre bore with point
The equal reliable contacts of the outer wall of flow cartridge, the cooling medium in centre bore on the inside of shunt cylinder by flowing through.
To enable element cooling water component reliably to export the heat caused by test fuel element, it is arranged are as follows:
The element cooling water component further includes for realizing limiting second of element cooling water flow path in element cooling water component
Baffling component 7, the second baffling component 7 include shunt cylinder and the isolation ring for being mounted on shunt cylinder upper end, and the isolation ring is made
For the connector of shunt cylinder and 6 inner wall of pressure tube assembly, the shunt cylinder is inserted into pressure tube assembly 6 and the lower end of shunt cylinder is prolonged
The downside inside pressure tube assembly 6 is extended to, and the isolation ring is as gap between shunting drum outer wall and 6 inner wall of pressure tube assembly
Isolation board in axial direction, element cooling water component include the entrance sleeve and discharge connection for being both connected to pressure tube assembly 6；
On the axis direction of pressure tube assembly 6, both the entrance sleeve and discharge connection are located at isolation ring
Not ipsilateral, the guiding tube assembly 11 is mounted in the shunt cylinder.In the present solution, by the isolation ring, so that by import
The cooling medium that adapter tube flows into the present apparatus only being capable of gap along shunt cylinder, between shunt cylinder lower end and pressure tube assembly 6
After turning back, that is, after flowing through fuel element region, then the present apparatus drawn by discharge connection.
For the accuracy of the gained test data of the raising present apparatus, setting are as follows: further include heat-insulation assembly 4, the pressure pipe
Component 6 is wrapped in the heat-insulation assembly 4, and the heat-insulation assembly 4 is heat-insulated for realizing pressure tube assembly 6 and outside.We
In case, the heat release region that 6 inside region of pressure tube assembly is equivalent to as fuel element, the heat-insulation assembly 4 is i.e. for wrapping up
State heat release region, to avoid or reduce the heat release region and extraneous heat exchange.
As noted previously, as He-3 screen can generate heat at work, test knot is made as a kind of avoidable He-3 screen
At the concrete scheme of influence, setting are as follows: the He-3 screen is located at the outside of heat-insulation assembly 4.
As the specific implementation of heat-insulation assembly 4, setting are as follows: the heat-insulation assembly 4 includes being set in pressure tube assembly 6
The sleeve in outside has between the inner wall of the sleeve and the outer wall of pressure tube assembly 6 for accommodating between gas insulation medium
Gap, the described gap for accommodating gas insulation medium are enclosure space, further include with it is described heat-insulated for accommodating gas
The gas that the gap of medium connects draws adapter tube.Present solution provides a kind of specific adiabatic schemes, i.e., using gas as insulation
Medium.Using this programme other than realizing insulation, mineral wool insulating medium is such as used compared to other, this programme is considered
Insulating medium work under radiation environment has the characteristics that good thermo-insulation properties can be kept for a long time using this programme；Simultaneously originally
The corresponding site that scheme considers the present apparatus is pressure vessel, is provided for accommodating the gap of gas insulation medium as closing
Space, in this way, can reflect the leak case of the present apparatus according to the humidity of gas in above-mentioned enclosure space in specific use, with
The leakage failure found in time or as early as possible the present apparatus at work or crackle are realized, conducive to the reliability and safety of present apparatus work
Property.
As those skilled in the art, since guiding tube assembly 11 needs to be vertically arranged in specific use, to make this
Device can fill up cooling water in space where fuel element to improve the heat transfer efficiency of cooling water at work, be conducive to the present apparatus
The timeliness of the data obtained result improves power monitoring response speed, to reach the mesh for improving present apparatus data result reliability
And improve the present apparatus safety, setting are as follows: it is described guiding tube assembly 11 upper end be additionally provided with exhaust pipe.
It is related to multiple boundaries in above scheme, if fuel element local environment needs to be set to an enclosed environment,
The enclosed environment is that a part in flow of cooling water path, heat-insulation assembly 4 need to be set to one in element cooling water component
Enclosed environment such as not will receive extraneous interference using nitrogen, He-3 screen assembly 3 needs to be set to one so that its interior gas
The pressure adjustable of He-3 gas is in a closed environment He-3 screen assembly 3 to change the power of fuel element or He-3 is avoided to overflow
Waste etc., supplement heat rejecter water assembly 2 be preferably provided with as a closed environment so that the fluid behaviour of supplement heat rejecter water more
It is easily reasonably controlled to achieve the purpose that reliably to cool down He-3 screen assembly 3.Above each environment is mutually isolated due to needing, and is having
It when body is implemented, is preferably arranged to include multiple mutually nested casings, the gap between casing is as required closed above
Environment, if pressure tube assembly 6 is in most inner side, then combustion can be obtained using plug in its open end when pressure tube assembly 6 is blind pipe
Expect enclosed environment locating for element；And between casing and casing, to enable the gap between casing to close, casing can be adopted
There is the blind pipe of end socket with one end, the open end of the blind pipe in outside can be sealed by the blind pipe on the inside of connecting flange 43 and its
Connection is tightly connected to obtain corresponding enclosure space with the blind pipe on the inside of it by welding.
Embodiment 3:
As shown in Figures 1 to 10, the present embodiment provides a kind of specific part on the basis of embodiment 1 or embodiment 2
Or concrete form and the specific utilization of component:
The irradiation devices include inner sleeve tube assembly 1, He-3 screen assembly 3, supplement heat rejecter water assembly 2, heat-insulation assembly 4, mistake
Cross tube assembly 5, pressure tube assembly 6, isocon 41, guiding tube assembly 11, fixed screen work component 12 etc., wherein guiding tube assembly
11 lower ends are connected and fixed screen work component 12, and it is successively inner sleeve tube assembly 1, He-3 screen from outside to inside which, which is sleeve type structure,
Component 3, pressure tube assembly 6, heat-insulation assembly 4, the second baffling component 7, guiding tube assembly 11 and fixed screen work component 12.It assists cold
But 2 upper end of water assembly is connect with He-3 screen assembly 3, and lower end is connect with inner sleeve tube assembly 1.5 lower end of transition tube assembly and insulation group
Part 4 is connected, and upper end is connected with pressure tube assembly 6.
Wherein, the inner sleeve tube assembly 1 specifically includes: inner sleeve pipe flange 13, inner sleeve 14,15 groups of inner sleeve lower head
At.Inner sleeve pipe flange 13 and lower head are stainless steel forgings, take butt welding with inner sleeve 14.14 outer wall of inner sleeve is reactor
Cooling water bears raft pressure, and the main function of inner sleeve tube assembly 1 is to provide to be isolated with extraneous for device, with heat-insulation assembly 4
One same-action constitutes auxiliary water loop flow boundary.
Wherein, the He-3 screen assembly 3 specifically includes: water inlet flange 20, upper support tube 21, interior screen 22, external screen 23, under
Support tube 24, helium screen assembly supporting block 25, auxiliary water loop adapter tube 19 form.Interior screen 22 and external screen 23 are made up of butt welding to be sealed
Space is closed, this structure can be avoided ultra-narrow space disengaging tracheae welding interference.It is interior for the leakage for preventing nuclear physics reaction product tritium
Shield 22 outer surfaces plating AL2O3, 2~2.5 μm of thickness,.The upper end of interior screen 22 and upper support tube 21 weld, and the lower end of interior screen 22 is under
Support tube 24 welds.Upper 21 upper end of support tube and auxiliary water loop adapter tube 19 and 20 butt welding of water inlet flange.Water inlet method
Sealing, lower end surface and 13 upper end of inner sleeve pipe flange is bolted in blue 20 upper surfaces and blue 16 lower end surfaces of supplement heat rejecter water law
Face connection sealing.
Wherein, the supplement heat rejecter water assembly 2 includes: supplement heat rejecter water law orchid 16, connecting tube 17, connector 18, auxiliary water
Circuit adapter tube 19 forms.Connecting tube 17 and supplement heat rejecter water law orchid 16 are welded, and connector 18 and connecting tube 17 are welded.He-3 passes in and out gas
Pipe realizes sealing by welding with connector 18.
Wherein, the transition tube assembly 5 includes: coupling tube 29, connecting tube 17, the composition of connector 18.Pass through transition tube assembly 5
The nitrogen charging between heat-insulated pipe and pressure pipe, to detect whether pressure pipe has breakage.Nitrogen inlet duct is drawn by transition tube assembly 5,
It is welded with connector 18 and realizes sealing.
Wherein, the pressure tube assembly 6 includes: upper end 30, major loop adapter tube 31, spacer flanger section, pressure pipe shell ring
33, spherical lower contact component, composition.Upper end 30, spacer flanger component 32, shell ring 27, spherical lower contact component take docking
Boxing.The water inlet of device is arranged at spacer flanger component 32, and water outlet is arranged at 30 component of upper end.Spherical lower contact
Component is by supporting 36, support spring 37 under spherical lower contact, spring, support 38, locating piece 39 form on spring.Locating piece 39 is equal
Cloth is welded on the outer surface of spherical lower contact, and support 36 is welded on the inner surfaces of globe joint 18 under spring, support spring 37 with
Supporting welding above and below spring.
Wherein, the heat-insulation assembly 4 includes: insulation pipe flange 26, shell ring 27, the composition of lower contact 28, is passed through between three
Butt welding constitutes component.It is 1.2MPa that 4 outer wall of heat-insulation assembly, which bears supplement heat rejecter water pressure, and inner wall is full of nitrogen, and pressure is
0.1MPa。
Wherein, the second baffling component 7 includes: that hoisting head 40, isocon 41 are welded to form.Pass through the second baffling component
7, the cooling water of major loop is flowed down along the outer wall of the second baffling component 7, is turned back to pressure bottom of the tube, along 41 inner wall stream of isocon
Out.
Wherein, the guiding tube assembly 11 includes: central straight pipe 42, connecting flange 43, guide rod 44 and 45 groups of guide head
At.It after whole device is connect with high temperature and pressure circuit, is vented by central straight pipe 42, it is ensured that pressure tube assembly 6 is full of water, guiding
Bar 44 and connecting flange 43 weld, guide head 45 and 44 butt welding of guide rod.It is oriented to tube assembly 11 and realizes screen work fixation kit
It extracts and installs.
Due to using, by the irradiation devices of single fuel element transient test, to be designed as include: inner sleeve tube assembly 1, auxiliary
Help cooling water assembly 2, transition tube assembly 5, He-3 screen assembly 3, supplement heat rejecter water assembly 2, heat-insulation assembly 4, pressure tube assembly 6,
Isocon 41, guiding tube assembly 11, the technical solution of fixed screen work component 12, can either meet fuel member under high temperature and high pressure condition
The requirement of part Irradiation Test, additionally it is possible to the change of fuel element power transience is realized by adjusting He-3 gas pressure；
Further, He-3 screen is made up of upper shell and lower shell internal butt welding and external butt welding, this structure
It can be avoided ultra-narrow space disengaging tracheae welding interference.
Further, He-3 screen bears the dynamic pressure of He-3 gas, pressure limit as He-3 gas compression reacting field
0.1~4.5MPa.
Further, due to He-3 gas can absorbing reaction heap dissipate incoming neutron, nuclear physics reaction occurs.Due to
Gas density changes correspondingly after He-3 gas pressure changes, and neutron absorption cross-section changes correspondingly after gas density changes, and participates in splitting
The number of neutrons for becoming reflection changes, and the change of number of neutrons quantity causes to participate in the number of neutrons that fission reaction occurs for fuel element
It changes, and then realizes the change of fuel element power；
Further, He-3 screen inner barrel plates AL2O3, 2~2.5 μm of thickness, slip is less than 1 × 10-7Pa.m3/ s, really
Tritium of the guarantor He-3 by nuclear physics reflection generation is not permeable to be spilt；
Further, a large amount of heat of nuclear physics reaction release occurs for He-3 gas, by supplement heat rejecter water to He-3 screen into
Row cooling guarantees He-3 screen safety；
Further, it is made up of supplement heat rejecter water assembly 2, inner sleeve tube assembly 1, He-3 screen assembly 3 and heat-insulation assembly 4 auxiliary
The interior outer flow passage of cooling water is helped, cooling 3 outside wall temperature of He-3 screen assembly is allowed to be no more than 100 DEG C, and naturally cold by runner
But make the water temperature in device exit lower than 50 DEG C；
Further, He-3 passes in and out tracheae and the connector 18 of supplement heat rejecter water assembly 2 realizes sealing by welding.
Further, the upper end 30, spacer flanger component 32, shell ring 27 of pressure tube assembly 6, spherical lower contact component are adopted
Docking boxing is taken, the main fission place as the test of fuel element high temperature and high salt.The water inlet of irradiation devices is arranged in centre
At flange assembly 32, water outlet is arranged at 30 component of upper end, and intake-outlet is connected with major loop, it is ensured that irradiation can reach
The operating condition of high-pressure；
Further, support 36, support spring 37 under spring, support 38 welds together on spring, for fixed screen work group
Part 12 provides to be supported under flexibility；
Further, after the fixed single fuel element of fixed screen work component 12, screen work lower end and pressure pipe lower head component
Spring on support contact, upper end be oriented to tube assembly 11 be connected through a screw thread；
Further, the connecting flange 43 for being oriented to tube assembly 11 is fixed on round plate by top bolt and small sealing ring
On flange 10, central straight pipe 42 fills cooling water to be vented, convenient for irradiation devices；
Further, by the compression of clamping sleeve 8 and big spring 9 and the second baffling component 7, the cooling of fuel element is formed
Runner takes away the heat of element fission reaction generation in time.
The above content is combine specific preferred embodiment to the further description of the invention made, and it cannot be said that originally
The specific embodiment of invention is only limited to these instructions.For those of ordinary skill in the art to which the present invention belongs,
The other embodiments obtained in the case where not departing from technical solution of the present invention should be included in the protection scope of corresponding invention.
Claims (10)
1. a kind of irradiation devices suitable for single fuel element transient test, including fixed screen work component (12) and guide pipe group
Part (11), which is characterized in that further include pressure tube assembly (6), the fixed screen work component (12) is mounted on pressure tube assembly (6)
It is interior, and pressure tube assembly (6) provides pressure boundary for the fuel element being fixed on fixed screen work component (12)；
It further include the He-3 screen assembly (3) for being arranged on the downside of pressure tube assembly (6), the He-3 screen assembly (3) includes being in
The He-3 screen of tubular, and the barrel of He-3 screen is hollow structure, the hollow structure is the axis tubular knot coaxial with He-3 screen
Structure；
The inner wall of the He-3 screen surrounds the centre bore of He-3 screen, and pressure tube assembly (6) lower end is partially or fully located at institute
It states in centre bore, and pressure tube assembly (6) and He-3 screen are coaxial；
The entrance sleeve and discharge connection being connected with the hollow structure are additionally provided on the He-3 screen；
It further include element cooling water component, the element cooling water component includes element cooling water runner, the element cooling water
Runner includes pressure tube assembly (6) lower end inside region.
2. a kind of irradiation devices suitable for single fuel element transient test according to claim 1, which is characterized in that
Coating is additionally provided on the wall surface of the hollow structure, the coating is the AL with a thickness of 2~2.5 μm2O3Coating.
3. a kind of irradiation devices suitable for single fuel element transient test according to claim 1, which is characterized in that
It further include the supplement heat rejecter water assembly (2) for cooling down the He-3 screen assembly (3).
4. a kind of irradiation devices suitable for single fuel element transient test according to claim 3, which is characterized in that
It further include inner sleeve tube assembly (1), the inner sleeve tube assembly (1) is the tubular structure that lower end is provided with end socket, pressure tube assembly (6)
Lower end insertion inner sleeve tube assembly (1) in, it is interior that He-3 screen assembly (3) is located at pressure tube assembly (6) outer wall and inner sleeve tube assembly (1)
In gap between wall；
Gap between pressure tube assembly (6) outer wall and inner sleeve tube assembly (1) inner wall is the cold of the supplement heat rejecter water assembly (2)
But water flow circulation passage.
5. a kind of irradiation devices suitable for single fuel element transient test according to claim 4, which is characterized in that
It further include for realizing first baffle means in flow of cooling water path in supplement heat rejecter water assembly (2), first folding is limited
Stream device limits the flow path of cooling water as any one in following manner:
It is flowed by He-3 screen close to the outside of the side of pressure tube assembly (6) upper end, through He-3 screen under pressure tube assembly (6)
The side baffling at end to He-3 screen centre bore, then by centre bore close to the outflow of the side of pressure tube assembly (6) upper end；
It is flowed by He-3 screen centre bore close to the side of pressure tube assembly (6) upper end, through He-3 screen centre bore close to pressure pipe group
The side baffling of part (6) lower end is flowed out to the outside of He-3 screen, then by He-3 screen close to the side of pressure tube assembly (6) upper end.
6. a kind of irradiation devices suitable for single fuel element transient test according to claim 1, which is characterized in that
The element cooling water component further includes for realizing limiting second of element cooling water flow path in element cooling water component
Baffling component (7), the second baffling component (7) include shunt cylinder and the isolation ring for being mounted on shunt cylinder upper end, the isolation
Connector of the ring as shunt cylinder and pressure tube assembly (6) inner wall, the shunt cylinder is inserted into pressure tube assembly (6) and shunt cylinder
Lower end extend to the internal downside of pressure tube assembly (6), and the isolation ring is as shunting drum outer wall and pressure tube assembly (6)
The upward isolation board of gap axis between inner wall, element cooling water component include the entrance sleeve for being both connected to pressure tube assembly (6)
And discharge connection；
On the axis direction of pressure tube assembly (6), both the entrance sleeve and discharge connection are located at isolation ring not
Ipsilateral, the guiding tube assembly (11) is mounted in the shunt cylinder.
7. a kind of irradiation devices suitable for single fuel element transient test according to claim 1, which is characterized in that
It further include heat-insulation assembly (4), the pressure tube assembly (6) is wrapped in the heat-insulation assembly (4), and the heat-insulation assembly (4) is used
In realizing the heat-insulated of pressure tube assembly (6) and outside.
8. a kind of irradiation devices suitable for single fuel element transient test according to claim 7, which is characterized in that
The He-3 screen is located at the outside of heat-insulation assembly (4).
9. a kind of irradiation devices suitable for single fuel element transient test according to claim 7, which is characterized in that
The heat-insulation assembly (4) includes the sleeve being set on the outside of pressure tube assembly (6), the inner wall and pressure tube assembly of the sleeve
(6) there is the gap for accommodating gas insulation medium, the gap for being used to accommodate gas insulation medium between outer wall
It further include that the gas to connect with the gap for accommodating gas insulation medium draws adapter tube for enclosure space.
10. a kind of irradiation suitable for single fuel element transient test as claimed in any of claims 1 to 9 fills
It sets, which is characterized in that the upper end of guiding tube assembly (11) is additionally provided with exhaust pipe.
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| CN201910180304.3A CN109859869B (en) | 2019-03-11 | 2019-03-11 | Irradiation device suitable for single fuel element transient test |
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| CN201910180304.3A CN109859869B (en) | 2019-03-11 | 2019-03-11 | Irradiation device suitable for single fuel element transient test |
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