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 plug

Info

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
Application number
JP9049218A
Other languages
Japanese (ja)
Inventor
Yuji Suzuki
木 勇 二 鈴
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Global Nuclear Fuel Japan Co Ltd
Original Assignee
Japan Nuclear Fuel Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Japan Nuclear Fuel Co Ltd filed Critical Japan Nuclear Fuel Co Ltd
Priority to JP9049218A priority Critical patent/JPH10246793A/en
Publication of JPH10246793A publication Critical patent/JPH10246793A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00Indexing codes associated with group G01N29/00
    • G01N2291/04Wave modes and trajectories
    • G01N2291/044Internal reflections (echoes), e.g. on walls or defects
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00Energy generation of nuclear origin
    • Y02E30/30Nuclear fission reactors

Landscapes

  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Monitoring And Testing Of Nuclear Reactors (AREA)

Abstract

PROBLEM TO BE SOLVED: To shorten inspection time, reduce costs, automate and shorten lead time. SOLUTION: An ultrasonic probe 5c for seam welding part 1c and an ultrasonic probe 5d for hole welding part 1d are placed side by side on the axis direction of a nuclear fuel rod 1 and a nuclear fuel rod drive part 4 is provided to turn these probes 5c and 5d in the rotational direction (the direction of the arrow B) around the axis of the nuclear fuel rod 1 and to move the nuclear fuel rod 1 to the axis direction (the direction of the arrow A). With two probes 5c and 5d, the seam welding part 1c and hole welding part 1d are simultaneously scanned in spiral.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【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.

【図面の簡単な説明】[Brief description of the drawings]

【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)

【特許請求の範囲】[Claims] 【請求項1】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.
【請求項2】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.
JP9049218A 1997-03-04 1997-03-04 Inspection method and device for welding part of nuclear fuel rod end plug Pending JPH10246793A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (4)

* Cited by examiner, † Cited by third party
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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