CN106469577B - Nuclear power plant reactor Nozzle Zone of Vessels safe end weld defect method for qualitative analysis - Google Patents
Nuclear power plant reactor Nozzle Zone of Vessels safe end weld defect method for qualitative analysis Download PDFInfo
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- CN106469577B CN106469577B CN201510501077.1A CN201510501077A CN106469577B CN 106469577 B CN106469577 B CN 106469577B CN 201510501077 A CN201510501077 A CN 201510501077A CN 106469577 B CN106469577 B CN 106469577B
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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
- Y02E30/30—Nuclear fission reactors
Abstract
The present invention provides a kind of nuclear power plant reactor Nozzle Zone of Vessels safe end weld defect method for qualitative analysis, the defects of 20% of the amplitude of the defect on distance gain size curve is more than or equal to defect amplitudes, detect respectively both sides difference in magnitude, multi-angle difference in magnitude, dynamic waveform whether multimodal, Swivel scan difference in magnitude, whether find end point signal this five contents up and down, according to the test result of above-mentioned five contents, judge the defect for nonplanarity defect or planarity defects.The nuclear power plant reactor Nozzle Zone of Vessels safe end weld defect method for qualitative analysis, propose a kind of safe end welding line ultrasonic detection Flaw discrimination analysis method workable, accuracy is high, the reliability of qualitative analysis the defects of during nuclear power plant reactor pressure vessel safety end weld seam manufactures can be significantly improved, the equipment with planarity defects is avoided to enter Installation in Plant, reduce the guarantee reprocessed risk, improve nuclear plant safety operation at nuclear power station scene.
Description
Technical field
The present invention relates to a kind of nuclear power plant reactor Nozzle Zone of Vessels safe end weld defect method for qualitative analysis.
Background technology
Nuclear power plant reactor Nozzle Zone of Vessels safe end is by low-alloy steel, the pre- heap side of nickel-base alloy, austenitic stainless steel
Weld seam and overlay cladding composition, structure and material are more complicated, and welding difficulty is big, it is possible to create crackle, incomplete fusion homalographic
The dangerous defect of property, the safe operation to the workmanship and nuclear power station of reactor pressure vessel may all bring bigger
Influence.
Because safe end weld grain is thick, heterogeneous interface is more, cause acoustic attenuation during ultrasound examination big, noise level
Height, and there is considerable influence in grain growth direction to the penetration capacity of ultrasonic wave and the direction of propagation, therefore, lacking during ultrasound examination
Fall into detection and qualitative analysis difficulty is bigger.Ray detection method, due to by ray and defect angle, defect and width
The influence of the factors such as degree, weld seam autologous tissue, it is also undesirable for the detectability of area defect, sometimes even due to weld seam
, there is false defect and shows in the reason for tissue.Therefore, the qualitative analysis of to safe end weld seam the defects of is always non-destructive testing technology neck
The a great problem in domain.
Research of the documents and materials of open report to the qualitative method of weld defect at present mainly concentrates on ferritic steel
The A of weld defect is swept on the static waveform and dynamic waveform of signal, these summed up according to substantial amounts of practical experience qualitative points
Analysis method, mainly by the experience of Site Detection personnel, the influence of testing staff's experience level, interference are suffered from operation
The factor of qualitative accuracy is more.Meanwhile these documents and materials do not have the defects of clear and definite proposition, system qualitative analysis stream
The adapter safe end weld seam of journey, particularly nuclear power plant reactor pressure vessel, also welded without open report specifically for safe end
The patent document of the method for qualitative analysis of seam defect.
The content of the invention
In view of the above the shortcomings that prior art, it is an object of the invention to provide a kind of nuclear power plant reactor pressure appearance
Device adapter safe end weld defect method for qualitative analysis, lack nuclear power plant reactor pressure vessel in the prior art for solution and connect
The problem of pipe safe end weld defect method for qualitative analysis.
In order to achieve the above objects and other related objects, the present invention provides a kind of nuclear power plant reactor Nozzle Zone of Vessels peace
Full end weld defect method for qualitative analysis, comprises the following steps：
1) ultrasonic measurement is carried out to the weld defect that needs are analyzed, if amplitude is less than apart from wave amplitude song the defects of the defect
The 20% of the amplitude of the defect on line, then the defect is nonplanarity defect；If the defects of defect amplitude be more than or equal to away from
From 20% of the amplitude of the defect on amplitude curve, then the defect needs further to be detected；
2) the defects of 20% of the amplitude of the defect on distance gain size curve being more than or equal to defect amplitudes, detect respectively
Both sides difference in magnitude, multi-angle difference in magnitude, dynamic waveform whether multimodal, Swivel scan difference in magnitude, whether find up and down end point signal
This five contents, according to the test result of above-mentioned five contents, judge the defect for nonplanarity defect or planarity defects；
If 3) judge the defect for nonplanarity defect, the defect is comparatively safe；If judge the defect for plane
Property defect, then the defect there is harmfulness.
Preferably, in step 2), the both sides difference in magnitude for detecting the defect obtains the first analysis indexes CH1, detects the defect
Multi-angle difference in magnitude obtain the second analysis indexes CH2, detect the defect dynamic waveform whether multimodal obtain the 3rd analysis refer to
CH3 is marked, the Swivel scan difference in magnitude for detecting the defect obtains the 4th analysis indexes CH4, detects whether the defect finds upper and lower side
Point signal obtains the 5th analysis indexes CH5, finally gives comprehensive analysis index CH=CH1+CH2+CH3+CH4+CH5, if CH >=
0.6, then the defect is planarity defects, if CH ＜ 0.6, the defect is nonplanarity defect.
Further preferred, the detection method of the both sides difference in magnitude in step 2) is：Use two groups of identical acoustic beam angles
The defects of the defects of probe detects respectively from the oblique upper of defect both sides, and one group of probe measures amplitude measures with another group of probe width
The difference of value is both sides difference in magnitude, if both sides difference in magnitude >=5dB, CH1=0.14, if both sides difference in magnitude ＜ 5dB, CH1=0.
Further preferred, the detection method of the multi-angle difference in magnitude in step 2) is：It is not less than using acoustic beam differential seat angle
What the defects of 10 ° of two groups of angle probes detect to the defect respectively, and one group of probe measures amplitude measured with another group of probe
The difference of defect amplitudes is multi-angle difference in magnitude, if multi-angle difference in magnitude >=6dB, CH2=0.17, if multi-angle difference in magnitude ＜
6dB, then CH2=0.
Further preferred, whether the detection method of multimodal is the dynamic waveform in step 2)：Angle probe is close or remote
During from defect, if multiple peak values be present in diverse location in defect dynamic echo waveform image, then it is assumed that dynamic waveform has multimodal, CH3
=0.18, if multiple peak values are not present in diverse location in defect dynamic echo waveform image, then it is assumed that multimodal is not present in dynamic waveform,
CH3=0.
Further preferred, the detection method of the Swivel scan difference in magnitude in step 2) is：Using defect as the center of circle, angle probe
Measured in ± 10 ° of the anglec of rotation around defect, the defects of measuring amplitude with angle probe when converting scanning direction
The defects of found, the difference of wave amplitude height peak was Swivel scan difference in magnitude, if Swivel scan difference in magnitude >=6dB, CH4
=0.26, if Swivel scan difference in magnitude ＜ 6dB, CH4=0.
It is further preferred, whether find that the detection method of upper and lower end point signal is in step 2)：Using ultrasonic phase array
Detection technique detects to the defect, if being observed on the fan sweeping image that ultrasonic phase array detects, obvious signal is special
Sign, then it is assumed that end point signal up and down is found, then CH5=0.25, if not observed on the fan sweeping image of ultrasonic phase array detection
To obvious signal characteristic, then it is assumed that do not find end point signal up and down, then CH5=0.
As described above, nuclear power plant reactor Nozzle Zone of Vessels safe end weld defect method for qualitative analysis of the present invention, tool
There is following beneficial effect：
The nuclear power plant reactor Nozzle Zone of Vessels safe end weld defect method for qualitative analysis, it is proposed that a kind of operable
Property strong, safe end welding line ultrasonic that accuracy is high detection Flaw discrimination analysis method, nuclear power plant reactor pressure can be significantly improved
The reliability of the qualitative analysis of the defects of during the weld seam manufacture of vessel safety end, avoids the equipment with planarity defects from entering power plant
Installation, reduce the guarantee reprocessed risk, improve nuclear plant safety operation at nuclear power station scene.
Brief description of the drawings
Fig. 1 is shown as the stream of nuclear power plant reactor Nozzle Zone of Vessels safe end weld defect method for qualitative analysis of the present invention
Journey schematic diagram.
Fig. 2 a to Fig. 2 b are shown as qualitative point of nuclear power plant reactor Nozzle Zone of Vessels safe end weld defect shown in Fig. 1
The detection method schematic diagram of the both sides difference in magnitude of analysis method.
Fig. 3 a to Fig. 3 b are shown as qualitative point of nuclear power plant reactor Nozzle Zone of Vessels safe end weld defect shown in Fig. 1
The detection method schematic diagram of the multi-angle difference in magnitude of analysis method.
Component label instructions
1 probe
2 parts to be measured
3 defects
Embodiment
Illustrate embodiments of the present invention below by way of specific instantiation, those skilled in the art can be by this specification
Disclosed content understands other advantages and effect of the present invention easily.The present invention can also pass through specific realities different in addition
The mode of applying is embodied or practiced, the various details in this specification can also be based on different viewpoints with application, without departing from
Various modifications or alterations are carried out under the spirit of the present invention.
Refer to Fig. 1 to Fig. 3 b.It should be noted that the diagram provided in the present embodiment only illustrates this in a schematic way
The basic conception of invention, the component relevant with the present invention is only shown in schema then rather than according to package count during actual implement
Mesh, shape and size are drawn, and kenel, quantity and the ratio of each component can be a kind of random change during its actual implementation, and its
Assembly layout kenel may also be increasingly complex.
As shown in figure 1, nuclear power plant reactor Nozzle Zone of Vessels safe end weld defect method for qualitative analysis of the present invention, bag
Include following steps：
1) ultrasonic measurement is carried out to the weld defect 3 that needs are analyzed, if amplitude is less than apart from wave amplitude the defects of defect 3
The 20% of the amplitude of the defect on curve, then the defect 3 is nonplanarity defect；If the defects of defect 3 amplitude is more than or waited
In 20% of the amplitude of the defect on distance gain size curve, then the defect 3 needs further to be detected；
2) the defects of 20% of the amplitude of the defect on distance gain size curve being more than or equal to defect amplitudes 3, examine respectively
Survey both sides difference in magnitude, multi-angle difference in magnitude, dynamic waveform whether multimodal, Swivel scan difference in magnitude, whether find up and down end points letter
Number this five contents, according to the test result of above-mentioned five contents, judge that the defect 3 lacks for nonplanarity defect or flatness
Fall into；
If 3) judge the defect 3 for nonplanarity defect, the defect 3 is comparatively safe；If judging, the defect 3 is flat
Face property defect, then the defect 3 there is harmfulness.
Wherein, in step 2), the both sides difference in magnitude for detecting the defect 3 obtains the first analysis indexes CH1, detects the defect 3
Multi-angle difference in magnitude obtain the second analysis indexes CH2, detect the defect 3 dynamic waveform whether multimodal obtain the 3rd analysis refer to
CH3 is marked, the Swivel scan difference in magnitude for detecting the defect 3 obtains the 4th analysis indexes CH4, detects whether the defect 3 finds up and down
End point signal obtains the 5th analysis indexes CH5, comprehensive analysis index CH=CH1+CH2+CH3+CH4+CH5 is finally given, if CH
>=0.6, then the defect 3 is planarity defects, if CH ＜ 0.6, the defect 3 is nonplanarity defect.
The detection method of both sides difference in magnitude is：Using the probe 1 of two groups of identical acoustic beam angles from the oblique upper of the both sides of defect 3
Detect respectively, the defects of one group of probe 1 measures amplitude and the difference of another group of probe 1 the defects of measuring amplitude be both sides difference in magnitude,
If both sides difference in magnitude >=5dB, CH1=0.14, if both sides difference in magnitude ＜ 5dB, CH1=0.As shown in Fig. 2 a to Fig. 2 b, two
The probe 1 of the identical acoustic beam angle of group detects respectively from the oblique upper of the both sides of defect 3, and wherein Fig. 2 a are top view, and Fig. 2 b are Fig. 2 a
Sectional view, two probe 1 acoustic beam angle, θ1It is equal, ultrasonic wave launch angle and to be measured part 2 of the acoustic beam angle for probe 1
Angle between surface normal.
The detection method of multi-angle difference in magnitude is：Using two group angle probes 1 of the acoustic beam differential seat angle not less than 10 ° respectively to this
The difference of the defects of the defects of defect 3 is detected, and one group of probe 1 measures amplitude and another group of probe 1 measure amplitude is multi-angle
Difference in magnitude, if multi-angle difference in magnitude >=6dB, CH2=0.17, if multi-angle difference in magnitude ＜ 6dB, CH2=0.Such as Fig. 3 a extremely
Fig. 3 b show two groups of probes 1 and defect 3 are overhauled respectively, and the acoustic beam angle of the probe 1 in wherein Fig. 3 a is θ2, in Fig. 3 b
The acoustic beam angle of probe 1 be θ3, | θ2-θ3|≥10°。
Whether the detection method of multimodal is dynamic waveform：During by angle probe 1 closer or far from defect 3, if defect dynamic wave
There are multiple peak values in shape image, then it is assumed that dynamic waveform has multimodal, CH3=0.18, if defect dynamic echo waveform in diverse location
Multiple peak values are not present in diverse location in image, then it is assumed that multimodal, CH3=0 is not present in dynamic waveform.
The detection method of Swivel scan difference in magnitude is：It is the center of circle with defect 3, anglec of rotation inner ring of the angle probe 1 at ± 10 °
The defects of the defects of measuring, measure around defect 3 amplitude is found with angle probe 1 when converting scanning direction wave amplitude height
The difference of peak is Swivel scan difference in magnitude, if Swivel scan difference in magnitude >=6dB, CH4=0.26, if Swivel scan amplitude
Poor ＜ 6dB, then CH4=0.
Whether find that the detection method of upper and lower end point signal is：The defect 3 is carried out using ultrasonic phase array detection technique
Detection, if observing obvious signal characteristic on the fan sweeping image that ultrasonic phase array detects, then it is assumed that find end points up and down
Signal, then CH5=0.25, if obvious signal characteristic is not observed on the fan sweeping image of ultrasonic phase array detection, recognizes
For end point signal above and below no discovery, then CH5=0.
The nuclear power plant reactor Nozzle Zone of Vessels safe end weld defect method for qualitative analysis, it is proposed that a set of for connecing
The defects of pipe safe end weld seam qualitative analysis flow and a kind of workable, safe end welding line ultrasonic that accuracy is high detection lack
Method for qualitative analysis is fallen into, normalizing is carried out by the way that the characteristic signal of planarity defects is analyzed and summarized, and to test data
Change is handled, and normalization coefficient value corresponding to defect characteristic signal is obtained, finally by the normalization coefficient to unlike signal feature
Value carries out the later assessment property of comprehensive assessment, planarity defects and nonplanarity defect is distinguished, if it is flat that defect 3 is qualitative
Face property defect, then generally mean that this defect 3 belongs to expansible dangerous defect, it is necessary to by strengthening tracking, reprocessing, very
To more bring it is further handled, and for nonplanarity defect, it is considered that be safe, only carry out at recording and tracking
Reason.
For issuable weld defect in nuclear power plant reactor Nozzle Zone of Vessels safe end weld seam manufacturing process, lead to
Cross and carry out a series of Applications of Ultrasonic Testing, establish drawbacks described above method for qualitative analysis analysis indexes and specific analytical method and
Flow.This method meets the principle of " together in using ", and user only needs the analysis in flaw indication feature meets this method
During index, you can defect property is evaluated, it is of the invention the defects of method for qualitative analysis specific estimation steps include：
1) amplitude is screened：According to the regulation of ASME specifications, defect amplitudes be less than 20%DAC (DAC, be distance gain size curve,
Refer to the signal wave amplitude amplitude of same reflection body relative to the curve of distance change；The defects of 20%DAC, i.e. a certain position, amplitude was
On DAC curves the amplitude of the position 20%) when, it is not necessary to defect property is analyzed, you can directly return such defect
Class is nonplanarity defect；When defect amplitudes are more than or equal to 20%DAC, according to the regulation of ASME specifications, then need to lacking
Sunken property is studied；
2) 19 planarity defects are detected from defect both sides respectively, while also carried out using ultrasonic phased array technology
Detection, testing result are shown in Table 1.Following two results can be obtained from table 1：
When a) being detected from the both sides of defect 3 to planarity defects, ratio of the defect amplitudes difference more than or equal to 5dB is
47%, you can thinking at least 47% planarity defects has the signal characteristic；
B) defect end point signal up and down can be clearly told from the point of view of ultrasonic phase array testing result, in planarity defects
Ratio be 84%, you can thinking at least 84% planarity defects has the signal characteristic.
Table 1：Planarity defects qualitative analysis index CH1 and index CH5 result of the test
3) other 27 planarity defects are carried out with multi-orientation detection respectively, around detection, and it is movable to observe probe
When the defects of dynamic waveform, the results are shown in Table 2.Following three results can be obtained from table 2：
When a) being detected using two group angle probes 1 of the acoustic beam differential seat angle not less than 10 ° to defect 3, defect amplitudes difference is big
In or equal to 6dB ratio be 59%, you can thinking at least 59% planarity defects has the signal characteristic；
B) defect dynamic echo waveform is observed, the ratio that can be clearly observable multiple peak values is 63%, you can thinks at least 63%
Planarity defects there is the signal characteristic；
C) Swivel scan is carried out to defect, when corner reaches 10 °, defect amplitudes are with angle probe 1 in conversion scanning direction
When the defects of finding wave amplitude height peak ratio of the difference more than or equal to 6dB be 88%, you can think at least 88%
Planarity defects there is the signal characteristic.
4) normalized：Fast Evaluation is carried out for ease of the user of the Flaw discrimination analysis method, according to above-mentioned flat
The probability statistics of planar defect signal characteristic result of the test, respectively by planarity defects qualitative analysis index CH1~CH5 assignment
0.47th, 0.59,0.63,0.84,0.88, the numerical value of each index divided by CH1~CH5 summations are then obtained into CH1~CH5 respectively
The normalization numerical value of index, respectively 0.14,0.17,0.18,0.26,0.25, CH1~CH5 summation is after normalized
1；
5) Flaw discrimination is evaluated：Carry out Flaw discrimination evaluation when, as flaw indication feature meet it is a certain in CH1~CH5
Index then assigns corresponding normalization numerical value, otherwise assigns 0 value, CH1~CH5 desired values after assignment then are carried out into phase
Add, as the planar disfigurement qualitative analysis index CH after Comprehensive Assessment be more than or equal to 0.6, then the determining defects are lacked for flatness
Fall into, be otherwise determined as nonplanarity defect.
Table 2：Planarity defects qualitative analysis index CH2, CH3, CH4 result of the test
Table 3 is to be tested using the defects of 9 heterogeneitys by the analysis method of the present invention come Judge plane defect
Card, the result prove that the defects of present invention method for qualitative analysis is able to ensure that the accuracy of qualitative results.
Table 3：Flaw discrimination analysis method checking test result
Present invention determine that five points that Flaw discrimination is analyzed in nuclear power plant reactor Nozzle Zone of Vessels safe end weld seam
Index is analysed, specify that the normalized parameter value (CH1~CH5) and defect property (flatness or nonplanarity) of every analysis indexes
Critical value, and establish a set of qualitative analysis stream for nuclear power plant reactor Nozzle Zone of Vessels safe end weld defect
Journey, using qualitative analysis normalized parameter value and critical value the defects of proposition in the present invention, Flaw discrimination analysis method can be simplified,
Reducing influences the human factor of Flaw discrimination analysis result, improves precision of analysis.
In summary, nuclear power plant reactor Nozzle Zone of Vessels safe end weld defect method for qualitative analysis of the present invention, is carried
A kind of safe end welding line ultrasonic detection Flaw discrimination analysis method workable, accuracy is high is gone out, core can be significantly improved
The reliability of the qualitative analysis of the defects of during the safe end of reactor pressure vessel weld seam manufacture of power station, avoids carrying planarity defects
Equipment enter Installation in Plant, reduce nuclear power station scene reprocess risk, improve nuclear plant safety operation guarantee.Institute
So that the present invention effectively overcomes various shortcoming of the prior art and has high industrial utilization.
The above-described embodiments merely illustrate the principles and effects of the present invention, not for the limitation present invention.It is any ripe
Know the personage of this technology all can carry out modifications and changes under the spirit and scope without prejudice to the present invention to above-described embodiment.Cause
This, those of ordinary skill in the art is complete without departing from disclosed spirit and institute under technological thought such as
Into all equivalent modifications or change, should by the present invention claim be covered.
Claims (6)
- A kind of 1. nuclear power plant reactor Nozzle Zone of Vessels safe end weld defect method for qualitative analysis, it is characterised in that including Following steps：1) ultrasonic measurement is carried out to the weld defect that needs are analyzed, if amplitude is less than on distance gain size curve the defects of the defect The 20% of the amplitude of the defect, then the defect is nonplanarity defect；If the defects of defect amplitude is more than or equal to apart from ripple The 20% of the amplitude of the defect on width curve, then the defect need further detected；2) the defects of 20% of the amplitude of the defect on distance gain size curve being more than or equal to defect amplitudes, both sides are detected respectively Difference in magnitude, multi-angle difference in magnitude, dynamic waveform whether multimodal, Swivel scan difference in magnitude, whether find up and down end point signal this five Item content, according to the test result of above-mentioned five contents, judges the defect for nonplanarity defect or planarity defects；Detection The both sides difference in magnitude of the defect obtains the first analysis indexes CH1, and the multi-angle difference in magnitude for detecting the defect obtains the second analysis and referred to CH2 is marked, detecting the dynamic waveform of the defect, whether multimodal obtains the 3rd analysis indexes CH3, detects the Swivel scan width of the defect Value difference obtains the 4th analysis indexes CH4, detects whether the defect finds that end point signal obtains the 5th analysis indexes CH5 up and down, most Comprehensive analysis index CH=CH1+CH2+CH3+CH4+CH5 is obtained eventually, if CH >=0.6, the defect is planarity defects, if CH ＜ 0.6, then the defect is nonplanarity defect；If 3) judge the defect for nonplanarity defect, the defect is comparatively safe；If judging, the defect lacks for flatness Fall into, then the defect has harmfulness.
- 2. nuclear power plant reactor Nozzle Zone of Vessels safe end weld defect method for qualitative analysis according to claim 1, Characterized in that, the detection method of the both sides difference in magnitude in step 2) is：Using the probe of two groups of identical acoustic beam angles from defect The difference of the defects of the defects of oblique upper of both sides is detected respectively, and one group of probe measures amplitude and another group of probe measure amplitude is two Side difference in magnitude, if both sides difference in magnitude >=5dB, CH1=0.14, if both sides difference in magnitude ＜ 5dB, CH1=0.
- 3. nuclear power plant reactor Nozzle Zone of Vessels safe end weld defect method for qualitative analysis according to claim 1, Characterized in that, the detection method of the multi-angle difference in magnitude in step 2) is：It is oblique using two groups of acoustic beam differential seat angle not less than 10 ° The difference of the defects of the defects of probe detects to the defect respectively, and one group of probe measures amplitude and another group of probe measure amplitude For multi-angle difference in magnitude, if multi-angle difference in magnitude >=6dB, CH2=0.17, if multi-angle difference in magnitude ＜ 6dB, CH2=0.
- 4. nuclear power plant reactor Nozzle Zone of Vessels safe end weld defect method for qualitative analysis according to claim 1, Characterized in that, whether the detection method of multimodal is the dynamic waveform in step 2)：During by angle probe closer or far from defect, if There are multiple peak values in defect dynamic echo waveform image, then it is assumed that dynamic waveform has multimodal, CH3=0.18, if lacking in diverse location Fall into dynamic waveform image and multiple peak values are not present in diverse location, then it is assumed that multimodal, CH3=0 is not present in dynamic waveform.
- 5. nuclear power plant reactor Nozzle Zone of Vessels safe end weld defect method for qualitative analysis according to claim 1, Characterized in that, the detection method of the Swivel scan difference in magnitude in step 2) is：Using defect as the center of circle, angle probe is at ± 10 ° Measured in the anglec of rotation around defect, the defects of measuring amplitude found with angle probe when convert scanning direction it is scarce The difference of trap panel height degree peak is Swivel scan difference in magnitude, if Swivel scan difference in magnitude >=6dB, CH4=0.26, if ring Around scanning difference in magnitude ＜ 6dB, then CH4=0.
- 6. nuclear power plant reactor Nozzle Zone of Vessels safe end weld defect method for qualitative analysis according to claim 1, Characterized in that, whether find that the detection method of upper and lower end point signal is in step 2)：Using ultrasonic phase array detection technique pair The defect is detected, if observing obvious signal characteristic on the fan sweeping image that ultrasonic phase array detects, then it is assumed that hair Now end point signal, then CH5=0.25 up and down, if obvious signal is not observed on the fan sweeping image of ultrasonic phase array detection Feature, then it is assumed that do not find end point signal up and down, then CH5=0.
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| CN101598682A (en) * | 2009-06-30 | 2009-12-09 | 中广核检测技术有限公司 | Welding line detector of adapter tube and safety end of nuclear reactor pressure vessel |
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