CN102107250A - Method for determining expansion process parameters of tube and tube plate of AP1000 nuclear evaporator - Google Patents
Method for determining expansion process parameters of tube and tube plate of AP1000 nuclear evaporator Download PDFInfo
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- CN102107250A CN102107250A CN 201010581265 CN201010581265A CN102107250A CN 102107250 A CN102107250 A CN 102107250A CN 201010581265 CN201010581265 CN 201010581265 CN 201010581265 A CN201010581265 A CN 201010581265A CN 102107250 A CN102107250 A CN 102107250A
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Abstract
The invention relates to a method for determining the expansion process parameters of a tube and a tube plate of an AP1000 nuclear evaporator, which comprises the followings steps: determining the minimum pull-off strength index value of an expanded joint of the tube and the tube plate and the thinning rate limited value of the tube subjected to expansion; carrying out three-dimensional finite element calculation so as to obtain the relationship between the expansion pressure and the thinning rate of the tube, the relationship between the expansion pressure and the pull-off force of the joint, and the relationship between the expansion pressure and the interfacial residual contact pressure of the tube and the tube plate when different initial gaps are formed between the tube and the tube plate; determining the yield strengths of materials of the tube plate and the tube at room temperature; determining the initial gap value between the tube and the tube plate; determining the minimum expansion pressure value corresponding to the initial gap value when the pull-off force is equal to the minimum pull-off strength index value, and the maximum expansion pressure value corresponding to the thinning rate limited value of the tube subjected to expansion; selecting an expansion pressure from an interval between the mid-value of the minimum and maximum expansion pressure values and the maximum expansion pressure so as to carry out expansion and pull-off tests, and determining the optimal expansion pressure value corresponding to the initial gap value and the pull-off force corresponding to the optimal expansion pressure; and determining the interfacial residual contact pressure value corresponding to the initial gap value and the optimal expansion pressure value.
Description
Technical field
The invention belongs to nuclear power generating equipment manufacturing technology field, be specifically related to AP1000 third generation nuclear power evaporator tube-to-tube sheet connection expanding joint process determination method for parameter, the expanding joint process that is AP1000 nuclear power evaporator tube-to-tube sheet connection provides and calculates and analytical method.
Background technology
The bloated process that adds seal weld of intensity is generally adopted in the connection of nuclear power evaporator pipe/tube sheet.The intensity of expanded joint joint lost efficacy will cause primary side radioactivity and corrosive catalyst carrier dielectric leakage, equipment safety operation and environment are made a big impact, so the quality of pipe/tube plate expanded-connecting be to guarantee the key of the normal operation of nuclear-plant.And the quality of expanded joint depends primarily on the expanding joint process parameter.
The expanded joint of nuclear power evaporator pipe/tube sheet generally adopts through thickness hydraulic expanding tube technology, is to have enough pull-off strengths and good sealing property to the performance requirement of expanded joint joint.The key element of guaranteed performance is to form enough residual contact pressure by expanded joint at pipe/tube sheet interface, and the principal element that influences the residual contact pressure size comprises primary clearance, pipe/tube sheet material mechanical property, physical dimension and the pore arrangement mode etc. at expanded joint pressure, pipe/tube sheet interface.For certain nuclear power evaporator, its pipe/tube sheet material, physical dimension and pore arrangement mode are certain, the key factor that then influences residual contact pressure and joint performance is the expanding joint process parameter, mainly is presented as the primary clearance at expanded joint pressure and pipe/tube sheet interface.
In traditional hydraulic expanding tube technology, its technological parameter mainly calculates by test, experience and simple mechanics-based to be determined.Promptly make and the measure-alike pipe/tube plate expanded-connecting imitation specimen of practical structures, by under different expanded joint pressure, carrying out hydraulic expanding tube, then the expanded joint joint is carried out the pull-off strength that pull-off test is measured joint on large-scale tensile testing machine, the pull-off strength and the sealing of the butt joint of establishing criteria standard are examined, and can determine to satisfy the technological parameter of joint performance requirement.The deficiency of this method is that cost is too high, need to consume great amount of manpower and material resources and financial resources, and needs repetition test, and the work period is long, and the optimal processing parameter of joint service reliability of being guaranteed surely also differs.
The definite of the expanding joint process parameter of second generation nuclear power evaporator pipe/tube sheet also mainly is to adopt above-mentioned traditional method at present, and promptly test, experience and simple computational methods also lack science, accurate and low cost method.At present different with the second generation at structure, material and the pore arrangement mode of the advanced person's who builds third generation AP1000 nuclear power evaporator pipe/tube sheet, can not be used for the third generation based on test and the definite second generation expanding joint process parameter of experience.Through document and patent retrieval, yet there is not the definite method of AP1000 third generation nuclear power evaporator pipe/tube plate expanded-connecting technological parameter at present both at home and abroad.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of low cost, is used for AP1000 third generation nuclear power evaporator tube-to-tube sheet connection expanding joint process determination method for parameter accurately and reliably.
AP1000 nuclear power evaporator tube-to-tube sheet connection expanding joint process determination method for parameter of the present invention comprises:
(1) determines the minimum pull-off strength desired value F of tube-to-tube sheet connection expanded joint joint
c, and the limit value R of pipe reduction behind definite expanded joint
Pc
Pipe reduction R
pDefine according to following formula:
In the formula: D is a pore diameter, and d is an ips behind the expand tube, and t is a pipe wall thickness before the expand tube, and unit is mm, and wherein ips d changes with the expanded joint pressure P behind the expand tube;
Obtain different primary clearance S between tube-to-tube sheet connection according to described formula by dimensional Finite Element
0The time expanded joint pressure P and pipe reduction R
pRelation;
Obtain different primary clearance S between tube-to-tube sheet connection by dimensional Finite Element
0The time the expanded joint pressure P and the relation of joint pulling-out force F;
Obtain different primary clearance S between tube-to-tube sheet connection by dimensional Finite Element
0The time the expanded joint pressure P and the relation of pipe and tube sheet interface residual contact pressure CP;
Primary clearance S wherein
0Be the pore diameter of expand tube front tube sheet and half of tube outer diameter difference;
(2) yield strength of mensuration normal temperature lower perforated plate material and tubing;
(3) the primary clearance value S between tube-to-tube sheet connection before the mensuration expand tube
0
(4) according to described different primary clearance S
0The time the expanded joint pressure P and the relation of joint pulling-out force F, determine the primary clearance value S that obtains corresponding to step (3)
0The time pulling-out force F equal described minimum pull-off strength desired value F
cThe time minimum expanded joint pressure value P
Min
(5) according to described different primary clearance S
0The time expanded joint pressure P and pipe reduction R
pRelation, determine the primary clearance value S that obtains corresponding to step (3)
0The time corresponding to pipe reduction limit value R behind the described expanded joint
PcThe time maximum expanded joint pressure value P
Max
(6) satisfy the expanded joint pressure limit of Joint Reliability index request in described minimum expanded joint pressure value P
MinWith described maximum expanded joint pressure value P
MaxBetween;
In described minimum expanded joint pressure value P
MinWith described maximum expanded joint pressure value P
MaxBetween intermediate value to described maximum expanded joint pressure value P
MaxThe interval in choose expanded joint pressure and carry out expanded joint and pull-off test, determine the primary clearance S that obtains corresponding to step (3)
0Best expanded joint pressure P
0, and by described different primary clearance S
0The time the expanded joint pressure P and the relation of joint pulling-out force F determine corresponding to described best expanded joint pressure P
0Pulling-out force F
0
(7) according to described different primary clearance S
0The time the expanded joint pressure P and the relation of pipe and tube sheet interface residual contact pressure CP, determine the primary clearance value S that obtains corresponding to step (3)
0With described best expanded joint pressure P
0Interface residual contact pressure CP
0
Can reduce the experimentation cost of determining AP1000 third generation nuclear power evaporator tube-to-tube sheet connection expanding joint process parameter by the present invention, and improve accuracy.
Description of drawings
Fig. 1 is the structure according to AP1000 nuclear power evaporator pipe/tube sheet of the present invention.
Fig. 2 is according to AP1000 nuclear power evaporator pore of the present invention and arrangement mode.
Fig. 3 is different primary clearance S between tube-to-tube sheet connection provided by the invention
0The time expanded joint pressure P and joint pulling-out force F relation curve family.
Fig. 4 is different primary clearance S between tube-to-tube sheet connection provided by the invention
0The time expanded joint pressure P and pipe reduction R
pRelation curve family.
Fig. 5 is different primary clearance S between tube-to-tube sheet connection provided by the invention
0The time expanded joint pressure P and pipe/tube sheet interface residual contact pressure CP relation curve family.
The specific embodiment
The present invention is based on advanced three dimensional FEM simulation calculates, the mechanical process and the various parameter butt joint Effect on Performance of AP1000 nuclear power evaporator pipe/tube plate expanded-connecting have been furtherd investigate, based on the in-depth analysis of each mechanics parameter and correlation thereof, the scientific analysis computational methods of definite expanding joint process parameter have been set up.This method can reduce the experimentation cost of determining the expanding joint process parameter, and improves accuracy.
The structure of third generation AP1000 nuclear power evaporator pipe/tube sheet that the present invention is suitable for as shown in Figure 1, tube plate thickness 798mm, tube outer diameter 17.48mm, ips 15.46mm, pipe wall thickness 1.01mm, the gap (amplifier section among Fig. 1) of expanding, end is 0～6.35mm.Pore and arrangement mode as shown in Figure 2, pore is by rounded projections arranged, pore diameter 17.73mm, pitch 24.892mm.The tube sheet material that is suitable for is an A508 class low-alloy steel forging, and its yield strength scope is at 410MPa-530MPa; Heat-transfer pipe (being the nuclear power evaporator pipe) material is Alloy 690 (Ni-based 690 alloys), and its yield strength scope is at 285MPa-360MPa, and this scope is that the present invention determines by numerical simulation calculation, as exceeds this scope, then not beneficially uses the present invention.The analysis calculation method of determining the expanding joint process parameter is as follows:
(1), determines the minimum pull-off strength desired value F of AP1000 nuclear power evaporator tube-to-tube sheet connection expanded joint joint according to correlation technique standards and norms (as U.S. ASME, French RCC-M etc.)
c, and the limit value R of pipe reduction behind the expanded joint
PcPipe reduction R
pPress following formula (1) definition, the pipe reduction R in this method Fig. 4 and (6)～(9) formula
pCalculate by following formula (1) with three-dimensional finite element.
D-pore diameter wherein, pipe wall thickness before the ips behind the d-expand tube, t-expand tube.Marked preceding tube outer diameter 17.48mm and the ips 15.46mm of expand tube among Fig. 1, pipe wall thickness t=(17.48-15.46) before the expand tube/2=1.01mm; The pore diameter design load that marks among Fig. 2 is 17.73mm, and ips d changes with expanded joint pressure behind the expand tube.
(2) yield strength of A508 class low-alloy steel forging tube sheet material under the test determination normal temperature, its measured value should be in the 410MPa-530MPa scope; Measure Alloy 690 heat-transfer pipe YIELD STRENGTH under the normal temperature, its measured value should be in the 285MPa-360MPa scope.
(3) the expand tube before measurement is decided the primary clearance value S between tube-to-tube sheet connection
0, i.e. half of pore diameter and tube outer diameter difference before the expand tube.The pore diameter design load is 17.73mm before the expand tube, and tube outer diameter is 17.48mm, by the S of this value calculating
0=(17.73-17.48)/2=0.125mm.In actual the manufacturing before the expand tube pore diameter with tube outer diameter and design load deviation is arranged, need practical measurement after, the primary clearance value S between the definite tube-to-tube sheet connection of calculating
0
(4) according to the primary clearance value S between tube-to-tube sheet connection
0, by different primary clearance S among Fig. 3
0The time the expanded joint pressure P and the relation curve family of joint pulling-out force F, or determine corresponding to S by mathematic(al) representation (2)～(5) interpolation calculation of each curve among Fig. 3
0The time pulling-out force equal minimum pull-off strength desired value F
cThe time minimum expanded joint low pressure limit value P
MinThe mathematic(al) representation of each curve is as follows among Fig. 3:.
S
0＝0.125mm：
F＝2924-44.55P+0.251P
2-6.160×10
-4P
3+5.603×10
-7P
4，P＝220-320MPa (2)
S
0＝0.15mm：
F＝2256-33.97P+0.188P
2-4.538×10
-4P
3+4.039×10
-7P
4，P＝220-320MPa (3)
S
0＝0.29mm：
F＝252.80-3.353P+0.014P
2-1.745×10
-5P
3-1.686×10
-9P
4，P＝220-330MPa (4)
S
0＝0.43mm：
F＝1256.4-17.31P+0.087P
2-1.866×10
-4P
3+1.473×10
-7P
4，P＝240-380MPa (5)
(5) according to the primary clearance value S between tube-to-tube sheet connection
0, by different primary clearance S among Fig. 4
0The time expanded joint pressure P and pipe reduction R
pRelation curve family, or determine corresponding to pipe reduction limit value R behind the expanded joint by mathematic(al) representation (6)～(9) interpolation calculation of each curve among Fig. 4
PcThe time maximum expanded joint pressure P
MaxThe mathematic(al) representation of each curve is as follows among Fig. 4:
S
0＝0.125mm：
R
p＝-5.053+0.064P-2.535×10
-4P
2+3.522×10
-7P
3，P＝220-360MPa (6)
S
0＝0.15mm：
R
p＝-4.977+0.064P-2.535×10
-4P
2+3.522×10
-7P
3，P＝220-360MPa (7)
S
0＝0.29mm：
R
p＝-5.202+0.071P-2.807×10
-4P
2+3.853×10
-7P
3，P＝220-360MPa (8)
S
0＝0.43mm：
R
p＝-9.336+0.121P-4.60×10
-4P
2+6.003×10
-7P
3，P＝220-380MPa (9)
(6) P
MinAnd P
MaxBetween be and satisfy the expanded joint pressure limit that the Joint Reliability performance assessment criteria requires.For guaranteeing that joint has higher pull-off strength and good sealing property, can be at P
MinAnd P
MaxBetween intermediate value to P
MaxLast interval range choose expanded joint pressure and carry out a small amount of expanded joint and pull-off test, and, can determine corresponding to primary clearance S by analysis-by-synthesis according to correlation technique standards and norms (as U.S. ASME, French RCC-M standard etc.) examination joint performance
0Best expanded joint pressure P
0, and can determine the pull-off strength of joint in conjunction with test by Fig. 3 or formula (2)～(5).Because expanded joint dwell time butt joint performance impact is very little, can determine voluntarily according to actual conditions and experience.
(7) foundation is corresponding to primary clearance S
0Best expanded joint pressure P
0, by different primary clearance S among Fig. 5
0The time the expanded joint pressure P and the relation curve family of pipe/tube sheet interface residual contact pressure CP, or calculate interpolation by mathematic(al) representation (10)～(13) of each curve among Fig. 5 and determine corresponding to S
0And P
0The time interface residual contact pressure CP
0, for the service reliability of assay joint provides technical parameter.The mathematic(al) representation of each curve is as follows among Fig. 5:
S
0＝0.125mm：
CP＝-55.52+0.272P，P＝220-340MPa (10)
S
0＝0.15mm：
CP＝-56.55+0.272P，P＝220-350MPa (11)
S
0＝0.29mm：
CP＝-57.62+0.265P，P＝220-360MPa (12)
S
0＝0.43mm：
CP＝-61.33+0.263P，P＝240-380MPa (13)
Embodiment 1
(1) as pressing American ASME, the axial load L=A during tube-to-tube sheet connection expanded joint joint design
t* S
y* f
r, A wherein
tBe heat-transfer pipe cross-sectional area, S
yBe the minimum yield strength of heat-transfer pipe material under operating temperature, f
rBe the Joint Reliability factor, its minimum value is 0.7 (be taken as 0.7 by the ASME standard is minimum, it is unreliable to be lower than 0.7 joint).For the AP1000 heat-transfer pipe shown in Fig. 1, its tube outer diameter is that 17.48mm and ips are 15.46mm, pipe wall thickness t=(17.48-15.46)/2=1.01mm, then the calculated value A of pipe cross-sectional area
t=52.23mm
2, check in the SMYS S of Alloy 690 pipes under 340 ℃ of operating temperatures from the ASME standard
y=190MPa, f
rValue be taken as 0.7, the axial load L=A of Ji Suaning then
t* S
y* f
r=6.947KN.Be that the minimum pull-off strength desired value that should reach of AP1000 nuclear power evaporator tube-to-tube sheet connection expanded joint joint should be F
c=6.947KN.As consider and do not take place bloatedly that by manufacturing enterprise's relevant criterion and this method Fig. 4, the limit value of the back pipe reduction that expands is taken as R
Pc=1.25%, manufacturing enterprise is according to experience, R
Pc1～3%, promptly above after this value, pipe reduction R
pRaise fast with expanded joint pressure, may take place bloated.
(2) yield strength as the A508 low-alloy steel pipe plate material of test determination under the normal temperature is 510MPa, and Alloy 690 heat-transfer pipe YIELD STRENGTH are 325MPa, and it is worth all in the scope of application of the present invention.
(3) the expand tube before measurement is decided the primary clearance value S between tube-to-tube sheet connection
0, this value is half of preceding pore diameter of expand tube and tube outer diameter difference.The preceding pore diameter design load of expand tube is 17.73mm among Fig. 2, and the preceding tube outer diameter design load of expand tube is 17.48mm among Fig. 1.Preceding pore diameter of expand tube and tube outer diameter and design load have deviation in actual the manufacturing, need practical measurement.After reality mensuration, the primary clearance value S between the tube-to-tube sheet connection of calculating
0=0.23mm.
(4) according to the primary clearance value S between tube-to-tube sheet connection
0=0.23mm (selects S among Fig. 3
0Immediate curve), determine corresponding to primary clearance value S by Fig. 3 or formula (2)～(5) interpolation calculation
0Pulling-out force F=F during=0.23mm
cMinimum expanded joint pressure value P during=6.947KN
Min=241MPa.
(5) according to the primary clearance value S between tube-to-tube sheet connection
0=0.23mm is determined corresponding to pipe reduction limit value R behind the expanded joint by Fig. 4 or formula (6)～(9) interpolation calculation
Pc=1.25% o'clock maximum expanded joint pressure P
Max=309MPa.
(6) thus the expanded joint pressure limit that is met the Joint Reliability index request be: between the 241MPa-309MPa.For guaranteeing that joint has higher pull-off strength and good sealing property, can choose expanded joint pressure at the interval range between the higher limit 309MPa of the intermediate value 275MPa between the 241MPa-309MPa and carry out a small amount of expanded joint and pull-off test, and according to correlation technique standards and norms (as U.S. ASME) examination joint performance, as determining corresponding to primary clearance S by analysis-by-synthesis
0The best expanded joint pressure P of=0.23mm
0=290MPa is then calculated by Fig. 3 or formula (2)～(5), and the pull-off strength that can obtain joint in conjunction with experiment is about 18.9KN, far above F
c=6.947KN.Be that the expanded joint joint is reliably, and have enough margins of safety.
(7) foundation is corresponding to primary clearance S
0The best expanded joint pressure P of=0.23mm
0=290MPa, by Fig. 5 or formula (10)～(13) but interpolation determine corresponding to S
0And P
0The time interface residual contact pressure CP
0=20.37MPa.Press the ASME standard, the residual contact pressure of expanded joint rear interface should be no more than 58% of pipe under the operating temperature or the minimum yield strength value of tube sheet material.Can check in the minimum yield strength value of the lower Alloy690 material of intensity under 340 ℃ of operating temperatures of AP1000 nuclear power from the ASME standard is 190MPa, thereby gets 58% * 190=110MPa.CP
0=20.37MPa is less than 110MPa, so P
0The expanded joint pressure of=290MPa can satisfy the service reliability requirement of joint.
Above embodiment only is used for explanation but does not limit the present invention.The present invention also has various deformation and improvement within the scope of the claims.Simple, the equivalence that every foundation claims of the present invention and description are done changes and modifies, and all falls into the claim protection domain of patent of the present invention.
Claims (10)
1. AP1000 nuclear power evaporator tube-to-tube sheet connection expanding joint process determination method for parameter comprises:
(1) determines the minimum pull-off strength desired value F of tube-to-tube sheet connection expanded joint joint
c, and the limit value R of pipe reduction behind definite expanded joint
Pc
Pipe reduction R
pDefine according to following formula:
In the formula: D is a pore diameter, and d is an ips behind the expand tube, and t is a pipe wall thickness before the expand tube, and unit is mm, and wherein ips d changes with the expanded joint pressure P behind the expand tube;
Obtain different primary clearance S between tube-to-tube sheet connection according to described formula by dimensional Finite Element
0The time expanded joint pressure P and pipe reduction R
pRelation;
Obtain different primary clearance S between tube-to-tube sheet connection by dimensional Finite Element
0The time the expanded joint pressure P and the relation of joint pulling-out force F;
Obtain different primary clearance S between tube-to-tube sheet connection by dimensional Finite Element
0The time the expanded joint pressure P and the relation of pipe and tube sheet interface residual contact pressure CP;
Primary clearance S wherein
0Be the pore diameter of expand tube front tube sheet and half of tube outer diameter difference;
(2) yield strength of mensuration normal temperature lower perforated plate material and tubing;
(3) the primary clearance S between tube-to-tube sheet connection before the mensuration expand tube
0
(4) according to described different primary clearance S
0The time the expanded joint pressure P and the relation of joint pulling-out force F, determine the primary clearance S that obtains corresponding to step (3)
0The time pulling-out force F equal described minimum pull-off strength desired value F
cThe time minimum expanded joint pressure value P
Min
(5) according to described different primary clearance S
0The time expanded joint pressure P and pipe reduction R
pRelation, determine the primary clearance S that obtains corresponding to step (3)
0The time corresponding to pipe reduction limit value R behind the described expanded joint
PcThe time maximum expanded joint pressure value P
Max
(6) satisfy the expanded joint pressure limit of Joint Reliability index request in described minimum expanded joint pressure value P
MinWith described maximum expanded joint pressure value P
MaxBetween;
In described minimum expanded joint pressure value P
MinWith described maximum expanded joint pressure value P
MaxBetween intermediate value to described maximum expanded joint pressure value P
MaxThe interval in choose expanded joint pressure and carry out expanded joint and pull-off test, determine the primary clearance S that obtains corresponding to step (3)
0Best expanded joint pressure P
0, and by described different primary clearance S
0The time the expanded joint pressure P and the relation of joint pulling-out force F determine corresponding to described best expanded joint pressure P
0Pulling-out force F
0
(7) according to described different primary clearance S
0The time the expanded joint pressure P and the relation of pipe and tube sheet interface residual contact pressure CP, determine the primary clearance S that obtains corresponding to step (3)
0With described best expanded joint pressure P
0Interface residual contact pressure CP
0
2. the method for claim 1 is characterized in that, according to the described minimum pull-off strength desired value F in American ASME or the French RCC-M standard determining step (1)
c
3. method as claimed in claim 2 is characterized in that, described minimum pull-off strength desired value F
cBe the axial load L of described tube-to-tube sheet connection expanded joint joint, determine by following formula:
L＝A
t×S
y×f
r，
In the formula: A
tBe the pipe cross-sectional area, unit is mm
2, S
yBe the minimum yield strength of tubing under operating temperature, unit is MPa, f
rBe the Joint Reliability factor.
4. method as claimed in claim 3 is characterized in that, described Joint Reliability factor f
rValue be not less than 0.7.
5. the method for claim 1 is characterized in that, described tube sheet material comprises A508 class low-alloy steel forging.
6. method as claimed in claim 5 is characterized in that, the yield strength scope of described tube sheet material is between 410MPa-530MPa.
7. the method for claim 1 is characterized in that, described tubing comprises Ni-based 690 alloys.
8. method as claimed in claim 7 is characterized in that, the yield strength scope of described tubing is between 285MPa-360MPa.
9. method as claimed in claim 2 is characterized in that, described interface residual contact pressure CP
0Be no more than in tube sheet material or the tubing minimum yield strength under operating temperature than 58% of low value.
10. method according to claim 1 is characterized in that, the limit value R of pipe reduction behind the described expanded joint
PcBetween 1～3%.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102201024A (en) * | 2011-06-29 | 2011-09-28 | 华东理工大学 | Method for determining process parameter of expanded connection between tube and tube plate of AP1000 nuclear power passive heat exchanger |
| CN103286231A (en) * | 2013-06-14 | 2013-09-11 | 哈电集团（秦皇岛）重型装备有限公司 | Thick-wall nickel base alloy heat exchanging tube and nickel base alloy tube plate expanding-connecting technology |
| CN117473881A (en) * | 2023-12-27 | 2024-01-30 | 湖南大学 | Deep learning-based nuclear fuel assembly expansion reliability analysis method and system |
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| 《石油化工设备》 20050630 王海峰，桑芝富 换热器管子与管板液压胀接接头连接性能 第34卷, 第1期 2 * |
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| CN102201024A (en) * | 2011-06-29 | 2011-09-28 | 华东理工大学 | Method for determining process parameter of expanded connection between tube and tube plate of AP1000 nuclear power passive heat exchanger |
| CN102201024B (en) * | 2011-06-29 | 2012-10-17 | 华东理工大学 | Method for determining process parameter of expanded connection between tube and tube plate of AP1000 nuclear power passive heat exchanger |
| CN103286231A (en) * | 2013-06-14 | 2013-09-11 | 哈电集团（秦皇岛）重型装备有限公司 | Thick-wall nickel base alloy heat exchanging tube and nickel base alloy tube plate expanding-connecting technology |
| CN117473881A (en) * | 2023-12-27 | 2024-01-30 | 湖南大学 | Deep learning-based nuclear fuel assembly expansion reliability analysis method and system |
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