CN106932480B - A method of improving fuel rod clad pipe reflectoscope stability - Google Patents
A method of improving fuel rod clad pipe reflectoscope stability Download PDFInfo
- Publication number
- CN106932480B CN106932480B CN201511028476.7A CN201511028476A CN106932480B CN 106932480 B CN106932480 B CN 106932480B CN 201511028476 A CN201511028476 A CN 201511028476A CN 106932480 B CN106932480 B CN 106932480B
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- CN
- China
- Prior art keywords
- fuel rod
- clad pipe
- reflectoscope
- rod clad
- stability
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
Abstract
The invention belongs to fuel rod control fields, specifically disclose a kind of method for improving fuel rod clad pipe reflectoscope stability.Including fuel rod clad pipe outer side opening, setting high intensity APP integral type tube connector, be placed in constant temperature water tank, detect longitudinal defect on tube wall.The present invention conveniently and effectively improves reflectoscope stability, improves the accuracy of flaw detection.
Description
Technical field
The invention belongs to fuel rod control fields, and in particular to a kind of raising fuel rod clad pipe reflectoscope is stable
The method of property.
Background technique
In the production process of fuel rod ultrasonic inspection, it may appear that the disturbance of diversified forms includes: electromagnetic interference, and machinery is disturbed
It moves, brings certain difficulty to tubing inspection, tubing erroneous judgement happens occasionally.The stability for improving reflectoscope reduces tubing
Erroneous judgement has very high practical value.
In ultrasonic inspection process, start flaw detection spindle motor and water circulating pump first, makes main shaft cavity interior full of water.
4 ultrasonic probes are mounted on the main shaft of rotation, and with main shaft high speed rotation, ultrasonic probe emits ultrasonic wave and passes through water
Coupling inject tubing inside.It can generate when encountering tubing internal flaw therebetween and be playbacked also referred to as with the positively related reflection of defect size
Wounding signal, the signal is through amplification, A/D, data processing, standard comparison.Finally issue sorting signals.
Fuel rod clad pipe reflectoscope in the prior art is not sufficiently stable, and needs to improve.
Summary of the invention
It is an object of the present invention to provide a kind of methods for improving fuel rod clad pipe reflectoscope stability.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention are as follows:
A method of fuel rod clad pipe reflectoscope stability being improved, it includes the following steps
Step 1: setting a diameter respectively on the outside of the flange shaft sleeve and guide sleeve axis of fuel rod clad pipe as the aperture of 5mm, disappear
Except a large amount of bubbles in main shaft dead zone；
Step 2: fuel rod motion being reduced using high-intensitive APP integral type tube connector in fuel rod clad pipe junction
In influence of the disturbance to ultrasonic inspection；
Step 3: fuel rod clad pipe is placed in constant temperature water tank, it is ensured that water temperature is constant, reduces temperature fluctuation and visits to ultrasound
The influence of wound；
Step 4: with refracted shear wave irradiation tube wall to detect the longitudinal defect on tube wall, and calculating refraction angle, eccentricity, most
The parameters such as good extent of the error；Calculating process includes
(5.1) refraction angle is calculated:
In formula,
β --- refraction angle；
--- incidence angle；
c1l--- longitudinal wave velocity in water, 1500m/s；
c2s--- the speed of shear wave, 3230m/s in tubing；
(5.2) eccentricity is calculated:
In formula,
D --- tube outer diameter；
--- incidence angle；
X --- eccentricity；
(5.3) best extent of the error is calculated:
0.25R≤X≤0.45r
In formula,
R --- tube outer diameter；
R --- pipe internal diameter.
The invention has the benefit that
A kind of method improving fuel rod clad pipe reflectoscope stability provided by the invention is by using firing
The outer side opening of charge bar cladding tubes, is placed in constant temperature water tank, detects on tube wall setting high intensity APP integral type tube connector
Longitudinal defect and etc., reflectoscope stability is conveniently and effectively improved, the accuracy of flaw detection is improved.
Specific embodiment
Technical solution of the present invention and beneficial effect are further illustrated combined with specific embodiments below.
A kind of method improving fuel rod clad pipe reflectoscope stability provided by the invention includes the following steps:
Step 1: it is the hole Φ 5mm that a diameter is respectively opened on the outside of the flange shaft sleeve and guide sleeve axis of fuel rod clad pipe, is eliminated
A large amount of bubbles in main shaft dead zone.
Step 2: fuel rod motion being reduced using high-intensitive APP integral type tube connector in fuel rod clad pipe junction
In influence of the disturbance to ultrasonic inspection.
Step 3: fuel rod clad pipe is placed in constant temperature water tank, it is ensured that water temperature is constant, reduces temperature fluctuation and visits to ultrasound
The influence of wound.
Step 4: with refracted shear wave irradiation tube wall to detect the longitudinal defect on tube wall, and calculating refraction angle, eccentricity, most
The parameters such as good extent of the error；Calculating process includes the following steps:
(5.1) refraction angle is calculated:
In formula,
β --- refraction angle；
--- incidence angle；
c1l--- longitudinal wave velocity in water, 1500m/s；
c2s--- the speed of shear wave, 3230m/s in tubing.
(5.2) eccentricity is calculated:
In formula,
D --- tube outer diameter；
--- incidence angle；
X --- eccentricity.
(5.3) best extent of the error is calculated:
0.25R≤X≤0.45r (3)
In formula,
R --- tube outer diameter；
R --- pipe internal diameter.
Claims (3)
1. a kind of method for improving fuel rod clad pipe reflectoscope stability, it is characterised in that: it includes the following steps
Step 1: respectively setting an aperture on the outside of the flange shaft sleeve and guide sleeve axis of fuel rod clad pipe, eliminate in main shaft dead zone
A large amount of bubbles；
Step 2: being reduced in fuel rod motion in fuel rod clad pipe junction using high-intensitive APP integral type tube connector
Disturb the influence to ultrasonic inspection；
Step 3: fuel rod clad pipe is placed in constant temperature water tank, it is ensured that water temperature is constant, reduces temperature fluctuation to ultrasonic inspection
It influences；
Step 4: with refracted shear wave irradiation tube wall to detect the longitudinal defect on tube wall, and calculate refraction angle, eccentricity, it is best partially
Heart range parameter.
2. a kind of method for improving fuel rod clad pipe reflectoscope stability according to claim 1, feature
Be: step 4 calculating process includes
(5.1) refraction angle is calculated:
In formula,
β --- refraction angle；
--- incidence angle；
c1l--- longitudinal wave velocity in water, 1500m/s；
c2s--- the speed of shear wave, 3230m/s in tubing；
(5.2) eccentricity is calculated:
In formula,
D --- tube outer diameter；
--- incidence angle；
X --- eccentricity；
(5.3) best extent of the error is calculated:
0.25R≤X≤0.45r
In formula,
R --- tube outer diameter；
R --- pipe internal diameter.
3. a kind of method for improving fuel rod clad pipe reflectoscope stability according to claim 1, feature
Be: the diameter of the aperture in the step 1 is Φ 5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511028476.7A CN106932480B (en) | 2015-12-31 | 2015-12-31 | A method of improving fuel rod clad pipe reflectoscope stability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511028476.7A CN106932480B (en) | 2015-12-31 | 2015-12-31 | A method of improving fuel rod clad pipe reflectoscope stability |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106932480A CN106932480A (en) | 2017-07-07 |
| CN106932480B true CN106932480B (en) | 2019-10-11 |
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ID=59442118
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511028476.7A Active CN106932480B (en) | 2015-12-31 | 2015-12-31 | A method of improving fuel rod clad pipe reflectoscope stability |
Country Status (1)
| Country | Link |
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| CN (1) | CN106932480B (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3337084A1 (en) * | 1983-10-12 | 1985-04-25 | Brown Boveri Reaktor GmbH, 6800 Mannheim | METHOD AND DEVICE FOR DETECTING DEFECTIVE FUEL TUBES OF WATER-COOLED CORE REACTORS |
| FR2663115B1 (en) * | 1990-06-08 | 1994-04-15 | Framatome | METHOD AND DEVICE FOR CONTROLLING THE THICKNESS AND THE COHESION OF THE INTERFACE OF A DUPLEX TUBE. |
| JP2010025678A (en) * | 2008-07-17 | 2010-02-04 | Mitsubishi Heavy Ind Ltd | Ultrasonic flaw detector |
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2015
- 2015-12-31 CN CN201511028476.7A patent/CN106932480B/en active Active
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| CN106932480A (en) | 2017-07-07 |
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Effective date of registration: 20200514 Address after: 100032 No.9 Huayuan street, Xicheng District, Beijing Patentee after: China Atomic Energy Industry Co., Ltd Address before: 273 mailbox 644000, Sichuan City, Yibin Province Patentee before: CNNC JIANZHONG NUCLEAR FUEL Co.,Ltd. |
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