JPH10246793A - Inspection method and device for welding part of nuclear fuel rod end plug - Google Patents
Inspection method and device for welding part of nuclear fuel rod end plugInfo
- Publication number
- JPH10246793A JPH10246793A JP9049218A JP4921897A JPH10246793A JP H10246793 A JPH10246793 A JP H10246793A JP 9049218 A JP9049218 A JP 9049218A JP 4921897 A JP4921897 A JP 4921897A JP H10246793 A JPH10246793 A JP H10246793A
- Authority
- JP
- Japan
- Prior art keywords
- fuel rod
- nuclear fuel
- axial direction
- fill
- ultrasonic probe
- Prior art date
- 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.)
- Pending
Links
- 239000003758 nuclear fuel Substances 0.000 title claims abstract description 33
- 238000007689 inspection Methods 0.000 title claims abstract description 28
- 238000003466 welding Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims description 13
- 239000000523 sample Substances 0.000 claims abstract description 27
- 239000000446 fuel Substances 0.000 claims description 9
- 238000001514 detection method Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- 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
- G01N2291/04—Wave modes and trajectories
- G01N2291/044—Internal reflections (echoes), e.g. on walls or defects
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Landscapes
- Monitoring And Testing Of Nuclear Reactors (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は原子燃料棒端栓溶接
部検査方法及び同装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for inspecting a welded end of a fuel rod end plug.
【０００２】[0002]
【従来の技術及び発明が解決しようとする課題】従来、
原子燃料棒の端栓溶接後においては、そのシーム溶接部
を超音波によって検査するとともに、穴埋め溶接部はＸ
線検査法によって検査が行われていた。2. Description of the Related Art
After the end plug welding of the nuclear fuel rod, the seam weld is inspected by ultrasonic waves, and
Inspection was performed by the line inspection method.
【０００３】しかしながら、この従来の穴埋め溶接部の
検査法であるＸ線検査法は燃料棒１本あたりの検査時間
が長いという問題があった。また、フィルム、現像代な
どでコストが大きく、さらに、自動化ができないという
問題もあった。However, the conventional X-ray inspection method, which is an inspection method for a weld-filled portion, has a problem that the inspection time per fuel rod is long. Further, there is a problem that the cost is large due to a film, a development cost, and the like, and further, automation cannot be performed.
【０００４】さらにまた、リアルタイムで検査できない
ため、リードタイムが長くなるという問題があった。[0004] Further, there is a problem that the lead time becomes long because the inspection cannot be performed in real time.
【０００５】本発明は上記従来技術の有する問題点に鑑
みてなされたもので、その目的とするところは、検査時
間の短縮、コスト低減、自動化、リードタイムの短縮を
図った原子燃料棒端栓溶接部検査装置を提供することに
ある。The present invention has been made in view of the above-mentioned problems of the prior art, and has as its object to shorten the inspection time, reduce the cost, automate the nuclear fuel rod, and shorten the lead time. It is to provide a welding part inspection device.
【０００６】[0006]
【課題を解決するための手段】本発明の原子燃料棒端栓
溶接部検査方法は、シーム溶接部用超音波探触子と穴埋
め溶接部用超音波探触子とを原子燃料棒の軸線方向に併
設し、これら探触子を原子燃料棒の軸線周り方向に回転
させるとともに該原子燃料棒を軸線方向に移動させるこ
とにより、前記シーム溶接部と穴埋め溶接部とを同時に
スパイラル状に走査するようにしたことを特徴とする。According to the present invention, an ultrasonic probe for seam welds and an ultrasonic probe for fill-in welds are provided in such a manner that the ultrasonic probe for seam welds and the ultrasonic probe for fill-in welds are arranged in the axial direction of the nuclear fuel rods. By rotating these probes in the direction around the axis of the nuclear fuel rod and moving the nuclear fuel rod in the axial direction, the seam welding portion and the fill-in welding portion are simultaneously scanned in a spiral manner. It is characterized by the following.
【０００７】また、本発明の原子燃料棒端栓溶接部検査
装置は、原子燃料棒を軸線方向に移動可能に支持する架
台と、その架台上に支持された原子燃料棒を把持し軸線
方向に移動させるチャック及び燃料棒駆動部と、シーム
溶接部用超音波探触子と穴埋め溶接部用超音波探触子と
を前記原子燃料棒の軸線方向に併設するとともに、両探
触子を原子燃料棒の軸線周りに回転駆動させる超音波検
査ユニットとを有することを特徴としてる。[0007] In addition, a nuclear fuel rod end plug weld inspection system of the present invention comprises a gantry for supporting a nuclear fuel rod movably in the axial direction, and holding the nuclear fuel rod supported on the gantry in the axial direction. A chuck and a fuel rod driving unit to be moved, an ultrasonic probe for a seam welding portion and an ultrasonic probe for a fill-in welding portion are provided along the axial direction of the nuclear fuel rod, and both probes are connected to the nuclear fuel rod. And an ultrasonic inspection unit that is driven to rotate about the axis of the rod.
【０００８】[0008]
【発明の実施の形態】以下に本発明の実施例について図
面を参照しつつ説明する。Embodiments of the present invention will be described below with reference to the drawings.
【０００９】図１において、架台２上には多数の支持ロ
ーラ２ａが互いに平行に配設されており、原子燃料棒１
が軸方向に移送可能に搭載されている。この架台２の一
端部には走査ユニット３が配設されている。上記走査ユ
ニット３には燃料棒駆動部４と超音波検査ユニット５と
が設けられている。燃料棒駆動部４は燃料棒１をチャッ
クするとともに、軸方向（矢印Ａ−Ａ´方向）に移送す
るものである。In FIG. 1, a large number of support rollers 2a are arranged on a gantry 2 in parallel with each other.
Is mounted so that it can be transferred in the axial direction. A scanning unit 3 is provided at one end of the gantry 2. The scanning unit 3 includes a fuel rod driving unit 4 and an ultrasonic inspection unit 5. The fuel rod drive unit 4 chucks the fuel rod 1 and transfers the fuel rod 1 in the axial direction (the direction of arrows AA ').
【００１０】一方、超音波検査ユニット５は図２に示す
ように原子燃料棒１と同軸の回転子５ａを有し、この回
転子５ａには旋回アーム部５ｂが固定され、この旋回ア
ーム部５ｂには原子燃料棒１の被覆管１ａに溶着された
端栓１ｂのシーム溶接部１ｃ及び穴埋め溶接部１ｄと対
応する位置上にシーム溶接部用超音波探触子５ｃと穴埋
め溶接部用超音波探触子５ｄとが原子燃料棒１の軸と平
行に且つ原子燃料棒１の軸方向に併設されている。原子
燃料棒１は矢印Ａ方向に移送されると同時に旋回アーム
部５ｂが原子燃料棒１の軸線周り方向に旋回する状態
で、両超音波探触子５ｃ，５ｄが作動され、例えば局部
水浸法、探触子回転式、または垂直探傷法によりシーム
溶接部１ｃと穴埋め溶接部１ｄとが同時にスパイラル状
に走査されるようになっている。On the other hand, as shown in FIG. 2, the ultrasonic inspection unit 5 has a rotor 5a coaxial with the nuclear fuel rod 1, and a turning arm 5b is fixed to the rotor 5a. The ultrasonic probe 5c for seam welding portion and the ultrasonic wave for filling hole welding portion are located at positions corresponding to the seam weld portion 1c and the fill hole weld portion 1d of the end plug 1b welded to the cladding tube 1a of the nuclear fuel rod 1. A probe 5 d is provided in parallel with the axis of the nuclear fuel rod 1 and in the axial direction of the nuclear fuel rod 1. When the nuclear fuel rod 1 is transported in the direction of arrow A and the revolving arm 5b is revolving around the axis of the nuclear fuel rod 1 at the same time, the two ultrasonic probes 5c and 5d are operated, and for example, local water immersion is performed. The seam welding portion 1c and the fill-in welding portion 1d are simultaneously scanned in a spiral manner by a probe method, a probe rotating type, or a vertical flaw detection method.
【００１１】ところで、上記両超音波探触子５ｃ，５ｄ
で検査された検出データは超音波検査モジュール６及び
データ処理パソコン７に送られる。上記穴埋め溶接部超
音波探触子５ｄからの検出信号は穴埋め溶接部表面エコ
ーと穴埋め溶接部底面エコーとの間に肉厚計測用ゲート
及び欠陥検出用ゲートをかけられ、それぞれＡＤ変換さ
れるとともに波形の平均化処理が行われ、Ｓ／Ｎが向上
された値が求められる。その計算された肉厚分布と欠陥
分布はパソコン７において２次元展開したグラフィック
で表示され、検査結果がリアルタイムで判定される。The two ultrasonic probes 5c, 5d
Are sent to the ultrasonic inspection module 6 and the data processing personal computer 7. The detection signal from the fill-fill weld ultrasonic probe 5d is passed through a thickness measurement gate and a defect detection gate between the fill-fill weld surface echo and the fill-fill weld bottom echo, and AD-converted, respectively. A waveform averaging process is performed, and a value with an improved S / N is obtained. The calculated thickness distribution and defect distribution are displayed in a two-dimensionally developed graphic on the personal computer 7, and the inspection result is determined in real time.
【００１２】特に、原子燃料棒穴埋め溶接部１ｄを超音
波で計測する際、穴埋め溶接部１ｄの肉厚測定・欠陥検
出に影響する穴埋め溶接部１ｄの表面落ち込みによる表
面エコーの乱れを、探触子の選定、ゲート位置、ゲート
内しきい値、水距離及び計測ソフトで対処する。In particular, when measuring the filling gap 1d of the nuclear fuel rod with ultrasonic waves, the disturbance of the surface echo caused by the surface drop of the filling gap welding section 1d affecting the thickness measurement and defect detection of the filling gap welding section 1d is detected. We will deal with the selection of the child, the gate position, the threshold value in the gate, the water distance, and the measurement software.
【００１３】また、ゲート内に発生する信号のうち、測
定範囲で２次元展開したグラフィック上で塊となってい
る信号以外はノイズとして消去する。[0013] Of the signals generated in the gate, signals other than those that are clustered on the graphic developed two-dimensionally in the measurement range are eliminated as noise.
【００１４】[0014]
【発明の効果】以上説明したように本発明によれば、穴
埋め溶接部を超音波検査するため、従来のＸ線検査法の
ようには長時間を必要とせず、またシーム溶接部とを同
時に検査するため、従来よりも１工程削減することがで
き、検査時間の短縮を図ることができる。As described above, according to the present invention, ultrasonic inspection is performed on the fill-in weld, so that a long time is not required unlike the conventional X-ray inspection method, and the seam weld can be simultaneously formed. Since the inspection is performed, the number of processes can be reduced by one step compared to the related art, and the inspection time can be reduced.
【００１５】また、Ｘ線検査法のときに必要としていた
フィルム、現像代などが不要となり、コスト低減を図る
ことができることとなる。Further, the film and development allowance required for the X-ray inspection method are not required, and the cost can be reduced.
【００１６】さらにまた、Ｘ線検査法のときに必要とし
ていた人間による目視判定は必ずしも必要としないため
に、自動化が可能となる。Furthermore, since visual judgment by a human, which is required in the X-ray inspection method, is not always necessary, automation becomes possible.
【００１７】さらにまた、リアルタイムで検査できるた
め、リードタイムの短縮を図ることができ、溶接工程へ
のフィードバックするタイミングを早くさせることがで
きる。Furthermore, since the inspection can be performed in real time, the lead time can be reduced, and the timing of feedback to the welding process can be made earlier.
【図１】本発明の一実施例に係る原子燃料棒端栓溶接部
検査装置の全容を示す正面図。FIG. 1 is a front view showing the entirety of a nuclear fuel rod end plug weld inspection system according to one embodiment of the present invention.
【図２】図１に示す装置の要部拡大正面図。FIG. 2 is an enlarged front view of a main part of the apparatus shown in FIG.
【符号の説明】 １ 原子燃料棒 １ａ 本体部 １ｂ 端栓 １ｃ シーム溶接部 １ｄ 穴埋め溶接部 ２ 架台 ２ａ 支持ローラ ３ 走査ユニット ４ 燃料棒駆動部 ５ 超音波検査ユニット ５ａ 回転子 ５ｂ 旋回アーム部 ５ｃ シーム溶接部探触子 ５ｄ 穴埋め溶接部探触子 ６ 検査モジュール ７ パソコン[Description of Signs] 1 Nuclear fuel rod 1a Main body 1b End plug 1c Seam weld 1d Fill-in-fill weld 2 Stand 2a Support roller 3 Scanning unit 4 Fuel rod drive 5 Ultrasonic inspection unit 5a Rotor 5b Swivel arm 5c Seam Weld probe 5d Fill-in weld probe 6 Inspection module 7 PC
Claims (2)
部用超音波探触子とを原子燃料棒の軸線方向に併設し、
これら探触子を原子燃料棒の軸線周り方向に回転させる
とともに該原子燃料棒を軸線方向に移動させることによ
り、前記シーム溶接部と穴埋め溶接部とを同時にスパイ
ラル状に走査するようにしたことを特徴とする原子燃料
棒端栓溶接部検査方法。An ultrasonic probe for seam welds and an ultrasonic probe for fill-in welds are provided side by side in the axial direction of a nuclear fuel rod.
By rotating these probes around the axis of the nuclear fuel rod and moving the nuclear fuel rod in the axial direction, the seam welding portion and the filling welding portion are simultaneously scanned in a spiral shape. Characteristic method for inspecting the welded end of a nuclear fuel rod end plug.
る架台と、その架台上に支持された原子燃料棒を把持し
軸線方向に移動させるチャック及び燃料棒駆動部と、シ
ーム溶接部用超音波探触子と穴埋め溶接部用超音波探触
子とを前記原子燃料棒の軸線方向に併設するとともに、
両探触子を原子燃料棒の軸線周りに回転駆動させる超音
波検査ユニットとを有することを特徴とする原子燃料棒
端栓溶接部検査装置。2. A gantry for supporting a nuclear fuel rod movably in an axial direction, a chuck and a fuel rod driving unit for gripping and moving the nuclear fuel rod supported on the gantry in the axial direction, and a seam welding part. Along with installing an ultrasonic probe and an ultrasonic probe for a fill-in-fill weld in the axial direction of the nuclear fuel rod,
An ultrasonic inspection unit for rotating both probes around an axis of a nuclear fuel rod, and an inspection apparatus for a welded end of a nuclear fuel rod end plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9049218A JPH10246793A (en) | 1997-03-04 | 1997-03-04 | Inspection method and device for welding part of nuclear fuel rod end plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9049218A JPH10246793A (en) | 1997-03-04 | 1997-03-04 | Inspection method and device for welding part of nuclear fuel rod end plug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10246793A true JPH10246793A (en) | 1998-09-14 |
Family
ID=12824821
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9049218A Pending JPH10246793A (en) | 1997-03-04 | 1997-03-04 | Inspection method and device for welding part of nuclear fuel rod end plug |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10246793A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007155394A (en) * | 2005-12-01 | 2007-06-21 | Toshiba Corp | Fuel rod inspection device |
| KR101156778B1 (en) * | 2006-12-22 | 2012-06-18 | 아레바 엔피 게엠베하 | Method for the pre-treatment of a fuel rod cladding tube for material testing |
| KR101403838B1 (en) * | 2014-02-20 | 2014-06-03 | 주식회사 포뉴텍 | Ultrasonic inspection method and system for nuclear fuel rods |
| CN105810270A (en) * | 2014-12-30 | 2016-07-27 | 中核武汉核电运行技术股份有限公司 | Single-rod eddy current inspection device |
-
1997
- 1997-03-04 JP JP9049218A patent/JPH10246793A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007155394A (en) * | 2005-12-01 | 2007-06-21 | Toshiba Corp | Fuel rod inspection device |
| KR101156778B1 (en) * | 2006-12-22 | 2012-06-18 | 아레바 엔피 게엠베하 | Method for the pre-treatment of a fuel rod cladding tube for material testing |
| KR101403838B1 (en) * | 2014-02-20 | 2014-06-03 | 주식회사 포뉴텍 | Ultrasonic inspection method and system for nuclear fuel rods |
| CN105810270A (en) * | 2014-12-30 | 2016-07-27 | 中核武汉核电运行技术股份有限公司 | Single-rod eddy current inspection device |
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