JPH02236499A - Melt repair device for damaged grain boundary part of heat-transfer tube of steam generator of pressurized water reactor - Google Patents
Melt repair device for damaged grain boundary part of heat-transfer tube of steam generator of pressurized water reactorInfo
- Publication number
- JPH02236499A JPH02236499A JP1058255A JP5825589A JPH02236499A JP H02236499 A JPH02236499 A JP H02236499A JP 1058255 A JP1058255 A JP 1058255A JP 5825589 A JP5825589 A JP 5825589A JP H02236499 A JPH02236499 A JP H02236499A
- Authority
- JP
- Japan
- Prior art keywords
- heat
- steam generator
- transfer tube
- grain boundary
- repair
- 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
- 230000008439 repair process Effects 0.000 title claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 7
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 6
- 239000010937 tungsten Substances 0.000 claims abstract description 6
- 238000002844 melting Methods 0.000 claims description 16
- 230000008018 melting Effects 0.000 claims description 16
- 239000013307 optical fiber Substances 0.000 claims description 4
- 238000013022 venting Methods 0.000 claims description 2
- 239000007789 gas Substances 0.000 abstract description 9
- 238000003466 welding Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 4
- 239000000523 sample Substances 0.000 abstract description 3
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 239000011261 inert gas Substances 0.000 abstract description 2
- 238000007689 inspection Methods 0.000 abstract description 2
- 239000000155 melt Substances 0.000 abstract 1
- 239000000498 cooling water Substances 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 229910001055 inconels 600 Inorganic materials 0.000 description 1
- 229910001098 inconels 690 Inorganic materials 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000012857 radioactive material Substances 0.000 description 1
Classifications
-
- 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
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、加圧水型原子炉（以下ＰＷＲと略す）の蒸気
発生器（以下ＳＧと略す）の伝熱管に粒界損傷（以下Ｉ
ＯＡと略す）が起った時にそのＩＯＡ部を溶融修復する
装置に関するものである。Detailed Description of the Invention [Industrial Field of Application] The present invention is directed to the prevention of intergranular damage (hereinafter referred to as I
This invention relates to a device for melting and repairing the IOA portion when an IOA (abbreviated as OA) occurs.
［従来の技術］
ＰＷＲのＳＧでは１次冷却水と２次冷却水との間で熱交
換を行うため、ニッケル基合金（通称インコネル６００
またはインコネル６９０）の伝熱管（外径約２２ｍｍ，
肉厚約Ｌ．３ｍｍ）が使用されているが、いくつかのプ
ラントでは、この伝熱管外面（２次側）にＩＯＡを生じ
ている。ＳＧ伝熱管は放射性物質を含んだ１次冷却水の
圧力バウンダリとなっており、１次側から２次側への冷
却水の漏洩が認められる場合は、ＰＷＲの運転は停止せ
ざるを得なくなる。[Prior art] In PWR SG, in order to exchange heat between the primary cooling water and the secondary cooling water, a nickel-based alloy (commonly known as Inconel 600) is used.
or Inconel 690) heat exchanger tube (outer diameter approximately 22 mm,
Wall thickness approximately L. 3 mm) is used, but in some plants, IOA is generated on the outer surface (secondary side) of this heat exchanger tube. The SG heat transfer tube is a pressure boundary for primary cooling water containing radioactive materials, and if leakage of cooling water from the primary side to the secondary side is detected, PWR operation will have to be stopped. .
しかし、従来は上述のＩＯＡが認められた場合には、伝
熱管に栓（プラグ）を施すか、またはＩＧＡ部の内側に
内筒（スリーブ）を取付けて補修していた。However, in the past, when the above-mentioned IOA was found, it was repaired by attaching a plug to the heat exchanger tube or attaching an inner cylinder (sleeve) inside the IGA section.
［発明が解決しようとする課題］
上述のようにＳＧ伝熱管に施栓を行うと、１次側から２
次側への伝熱が途絶えるので、施栓する伝熱管の本数に
は上限がある。一方、スリーブの場合は、伝熱機能は残
るが管内の流路断面積が減るため圧損の問題が生じる。[Problem to be solved by the invention] When the SG heat exchanger tube is plugged as described above, the
Since heat transfer to the next side is interrupted, there is an upper limit to the number of heat transfer tubes that can be plugged. On the other hand, in the case of a sleeve, although the heat transfer function remains, the cross-sectional area of the flow path within the tube is reduced, resulting in pressure drop problems.
本発明は、上記のような伝熱が途絶えることの問題、ま
た伝熱管内の流路断面積が減って圧損が起こる問題など
を解決するＳＧ伝熱管ＩＯＡ部の修復を目的とするもの
である。The present invention is aimed at repairing the IOA section of the SG heat exchanger tube, which solves the problem of interruption of heat transfer as described above, as well as the problem of pressure drop caused by a reduction in the cross-sectional area of the flow path within the heat exchanger tube. .
［課題を解決するための手段］
上記の目的を達成するために、請求項１の発明はＳＧ伝
熱管のＩＯＡによる損傷を第１図に示す具体例１のよう
にＴ Ｉ Ｇ（Ｔｕｎｇｓｔｅｎ Ｉｎｅｒｔ Ｇａｓ
）溶融によって損傷部を溶融修復することにした。[Means for Solving the Problems] In order to achieve the above object, the invention of claim 1 treats damage caused by IOA to SG heat exchanger tubes by using TIG (Tungsten Inert Gas) as in Example 1 shown in FIG.
) It was decided to repair the damaged part by melting.
同図は、ＩＯＡが発生しているＳＧ伝熱管６に挿入され
ている修復ヘッドＨ／の説明図で、１はタングステント
ーチ，２ａ，２ｂは位置決め用リング，３はガス抜き凹
部，４は給電棒，５は絶縁筒，７は電源ケーブル，８は
ガス（ＨｅまたはＡｒ）供給ラインである。この修復ヘ
ッドＨ，が後述の実施例に示すような配列で使用され、
ＳＧ伝熱管６のＩＯＡ部が溶融修復される。The figure is an explanatory diagram of the repair head H/ inserted into the SG heat exchanger tube 6 where IOA is occurring, where 1 is a tungsten torch, 2a and 2b are positioning rings, 3 is a gas vent recess, and 4 is a power supply. 5 is an insulating tube, 7 is a power cable, and 8 is a gas (He or Ar) supply line. This repair head H, is used in an arrangement as shown in the example below,
The IOA portion of the SG heat transfer tube 6 is melted and repaired.
請求項２の発明はＳＧ伝熱管のＩＯＡによる損傷部を第
２図に示す具体例２のようにして、レーザー光による溶
融によって修復することにした。In the second aspect of the invention, the damaged part of the SG heat exchanger tube caused by IOA is repaired by melting with laser light as in Example 2 shown in FIG.
同図はＩＯＡが発生しているＳＧ伝熱管（２Ｇ）に挿入
されている修復ヘッドＨ．の説明図で、２１はレーザー
光， ２２ａ， ２２ｂは位置決め用リング，２３はレ
ンズ，２４はミラー，２５は光ファイバケーブルでレー
ザー光２１を上記のレンズ２３，ミラー２４によってレ
ーザー光がＳＧ伝熱管２６のＩＧＡ部に収束して、該損
傷部が溶融修復されるようにした。The same figure shows the repair head H. which is inserted into the SG heat exchanger tube (2G) where IOA is occurring. In this explanatory diagram, 21 is a laser beam, 22a and 22b are positioning rings, 23 is a lens, 24 is a mirror, and 25 is an optical fiber cable. The damage was converged on No. 26 IGA portion, and the damaged portion was melted and repaired.
［作用］
ＥＣＴ（渦電流探傷試験）の検査プローブにより損傷位
置を固定したのち、第１図，第２図に示した修復ヘッド
Ｈ，またはＨλをＳＧ伝熱管６または２６のＩＯＡ部へ
、セッティングして損傷部をＴＩＧ溶接法またはレーザ
ー溶接法で溶融し，そののち残留応力除去の熱処理を行
って溶融修復作業を完了する。[Operation] After fixing the damage position with an ECT (eddy current testing) inspection probe, set the repair head H or Hλ shown in Figs. 1 and 2 to the IOA section of the SG heat exchanger tube 6 or 26. Then, the damaged part is melted by TIG welding or laser welding, and then heat treatment is performed to remove residual stress to complete the melting repair work.
なお、第３図は伝熱管のＩＧＡ部が溶融→修復される過
程を示すもので、ＩＧＡ部は溶融により消滅することが
示されている。Note that FIG. 3 shows the process in which the IGA portion of the heat exchanger tube is melted and then repaired, and it is shown that the IGA portion disappears by melting.
［実施例］
実施例Ｉ
ＴＩＧ溶接法による溶融修復装置の実施例を第４図に示
して説明する。[Example] Example I An example of a fusion repair device using the TIG welding method will be described with reference to FIG. 4.
ＥＣＴのプローブによりＳＯ伝熱管６の損傷位置を固定
したのち、前述の具体例１の修復ヘッドＨ，を、その損
傷位置にセッティングして、電源ケーブルおよびガス供
給ラインとガス（ Ｈ ｅまたはＡｒ）ボンベ１１を連
結する溶接機１０と接続し、溶融修復装置として使用す
る。なお，９はＳＧマンホール．１２はアース端子，１
３はＳＧ水室，１４は伝熱管固定板である。After fixing the damaged position of the SO heat exchanger tube 6 with the ECT probe, the repair head H of the above-mentioned specific example 1 is set at the damaged position, and the power cable and gas supply line are connected to the gas (H e or Ar). It is connected to a welding machine 10 that connects the cylinder 11 and used as a melting repair device. In addition, 9 is the SG manhole. 12 is the ground terminal, 1
3 is an SG water chamber, and 14 is a heat exchanger tube fixing plate.
実施例２
レーザー溶接法による溶融修復装置の実施例を第５図に
示して説明する。Example 2 An example of a melting repair device using a laser welding method is shown in FIG. 5 and will be described.
前述の具体例２の修復ヘッドＨλを実施例１と同様の方
法でＳＧ伝熱ＩＰ２６のＩＧＡ部にセッティングし、図
示するようにレーザー発振器２８，入射光学系２７につ
ながる光ファイバケーブル２５がＳＧマンホール３０か
らＳＧ水室３１に導入され、出射光学系２９を経て修復
ヘッドＨ２につながっている。The repair head Hλ of the above-mentioned specific example 2 is set in the IGA section of the SG heat transfer IP 26 in the same manner as in the embodiment 1, and the optical fiber cable 25 connected to the laser oscillator 28 and the input optical system 27 is connected to the SG manhole as shown in the figure. 30 into the SG water chamber 31, and is connected to the repair head H2 via the output optical system 29.
このようにしてレーザー溶融による修復装置が形成され
使用される。In this manner, a laser-fused repair device is formed and used.
［発明の効果］
本発明の溶融修復装置を用いることにより、ＳＧ伝熱管
に施栓することなく、伝熱管内側から損傷箇所を溶融修
復するので、伝熱の途絶えることなく，またスリーブを
用いないため流路断面積の減小がないので，圧損を生じ
ることもなく、ＳＧ伝熱管の熱伝達の能率低下を来さな
い。[Effects of the Invention] By using the melting repair device of the present invention, damaged parts are melted and repaired from the inside of the heat exchanger tube without plugging the SG heat exchanger tube, so heat transfer is not interrupted and a sleeve is not used. Since there is no decrease or decrease in the cross-sectional area of the flow path, no pressure loss occurs, and the heat transfer efficiency of the SG heat transfer tubes does not decrease.
第１図および第２図は、本発明の溶融修復装置の最も特
徴とする溶融修復ヘッドの異なる具体例の説明図，第３
図は伝熱管のＩＧＡ部の溶融修復過程を示す説明図，第
４図および第５図はそれぞれ第１図，第２図の修復ヘッ
ドを用いる溶融修復装置の実施例説明図である。
１・・タングステントーチ， ２ａ， ２ｂ・・位置決
め用リング、３・・ガス抜き凹部，４・・給電棒、５・
・絶縁筒、６・・ＳＧ伝熱管、７・・電源ケーブル、８
・・ガス供給ライン、９・・ＳＧマンホール． １０・
・溶接機、１１・・ガスボンベ、１２・・アース端子、
１３・・ＳＧ水室，１４・・伝熱管固定板、２ｌ・・レ
ーザー光、２２ａ ， ２２ｂ・・位置決め用リング、
２３・・レンズ、２４・・ミラー、２５・・光ファイバ
ケーブル、２６・・ＳＧ伝熱管、２７・・入射光学系、
２８・・レーザー発振器、２９・・出射光学系、３０・
・ＳＧマンホール、３１・・ＳＧ水室、Ｈ，・・修復ヘ
ッド（Ｔ Ｉ Ｇ溶融用）、Ｈ１・・修復へッド（レー
ザー溶融用）1 and 2 are explanatory diagrams of different specific examples of the melting repair head, which is the most characteristic feature of the melting repair apparatus of the present invention, and FIG.
The figure is an explanatory view showing the melting repair process of the IGA portion of the heat exchanger tube, and FIGS. 4 and 5 are explanatory views of an embodiment of the melting repair apparatus using the repair heads of FIGS. 1 and 2, respectively. 1... Tungsten torch, 2a, 2b... Positioning ring, 3... Gas venting recess, 4... Power supply rod, 5...
・Insulation tube, 6..SG heat exchanger tube, 7..power cable, 8.
...Gas supply line, 9...SG manhole. 10・
・Welding machine, 11... Gas cylinder, 12... Earth terminal,
13...SG water chamber, 14...heat exchanger tube fixing plate, 2l...laser light, 22a, 22b...positioning ring,
23... Lens, 24... Mirror, 25... Optical fiber cable, 26... SG heat exchanger tube, 27... Incoming optical system,
28... Laser oscillator, 29... Output optical system, 30...
・SG manhole, 31...SG water chamber, H,...Repair head (for TIG melting), H1...Repair head (for laser melting)
Claims (1)
３）を設けた蒸気発生器伝熱管（６）の損傷部位置決め
用リング（２ａ、２ｂ）を取付けた給電棒（４）とそれ
を包囲する絶縁筒 （５）よりなる修復ヘッド（Ｈ＿１）が、前記給電棒（
４）のもう一方の端部に接続された電源ケーブル（７）
とガス供給ライン（８）と共に蒸気発生器伝熱管（６）
の粒界損傷部に挿入されてなることを特徴とする加圧水
型原子炉の蒸気発生器伝熱管の粒界損傷部溶融修復装置
。 ２ 蒸気発生器伝熱管（２６）の粒界損傷部の位置決め
用リング（２２ａ、２２ｂ）と、一方の端部近傍にレー
ザー光（２１）を通過させるレンズ（２３）とこの通過
したレーザー光を粒界損傷部に反射収束させるミラー（
２４）を有し、前記レンズにレーザー光を導く光ファイ
バケーブル（２５）を有する修復ヘッド（Ｈ＿２）を蒸
気発生器伝熱管（２６）内に挿入してなることを特徴と
する加圧水型原子炉の蒸気発生器伝熱管の粒界損傷溶融
修復装置。[Claims] 1. It has a tungsten torch (1), and has a gas venting recess (
The repair head (H_1) consists of a power supply rod (4) to which rings (2a, 2b) for locating the damaged part of the steam generator heat exchanger tube (6) are attached and an insulating tube (5) surrounding it. , the power supply rod (
Power cable (7) connected to the other end of 4)
steam generator heat exchanger tubes (6) together with and gas supply lines (8)
A device for melting and repairing a damaged grain boundary of a steam generator heat transfer tube of a pressurized water reactor, characterized in that the device is inserted into a damaged grain boundary of a pressurized water nuclear reactor. 2. A ring (22a, 22b) for positioning the grain boundary damaged part of the steam generator heat transfer tube (26), a lens (23) that allows the laser beam (21) to pass near one end, and a lens (23) that allows the laser beam (21) to pass through the passed laser beam. A mirror (
24), and a repair head (H_2) having an optical fiber cable (25) for guiding laser light to the lens is inserted into a steam generator heat transfer tube (26). Intergranular damage melting repair device for steam generator heat transfer tubes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1058255A JPH02236499A (en) | 1989-03-10 | 1989-03-10 | Melt repair device for damaged grain boundary part of heat-transfer tube of steam generator of pressurized water reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1058255A JPH02236499A (en) | 1989-03-10 | 1989-03-10 | Melt repair device for damaged grain boundary part of heat-transfer tube of steam generator of pressurized water reactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02236499A true JPH02236499A (en) | 1990-09-19 |
Family
ID=13079040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1058255A Pending JPH02236499A (en) | 1989-03-10 | 1989-03-10 | Melt repair device for damaged grain boundary part of heat-transfer tube of steam generator of pressurized water reactor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02236499A (en) |
-
1989
- 1989-03-10 JP JP1058255A patent/JPH02236499A/en active Pending
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