JP3267338B2 - Pressure vessel piping connection method - Google Patents
Pressure vessel piping connection methodInfo
- Publication number
- JP3267338B2 JP3267338B2 JP25138092A JP25138092A JP3267338B2 JP 3267338 B2 JP3267338 B2 JP 3267338B2 JP 25138092 A JP25138092 A JP 25138092A JP 25138092 A JP25138092 A JP 25138092A JP 3267338 B2 JP3267338 B2 JP 3267338B2
- Authority
- JP
- Japan
- Prior art keywords
- pressure vessel
- corrosion
- resistant material
- welding
- hole
- 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.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims description 11
- 238000005260 corrosion Methods 0.000 claims description 44
- 230000007797 corrosion Effects 0.000 claims description 44
- 239000000463 material Substances 0.000 claims description 36
- 238000003466 welding Methods 0.000 claims description 36
- 238000005304 joining Methods 0.000 claims description 7
- 238000005253 cladding Methods 0.000 claims description 6
- 230000035515 penetration Effects 0.000 description 16
- 238000005336 cracking Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- 229910000851 Alloy steel Inorganic materials 0.000 description 4
- 229910001026 inconel Inorganic materials 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000011324 bead Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 102200052313 rs9282831 Human genes 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
- Y02E30/30—Nuclear fission reactors
Landscapes
- Butt Welding And Welding Of Specific Article (AREA)
Description
【０００１】[0001]
【産業上の利用分野】原子力プラント等の圧力容器に係
り、特に圧力容器に計装ノズル等の配管部材を溶接によ
り接合するのに好適な配管接合方法に関する。It relates to a pressure vessel, such as a nuclear power plant BACKGROUND OF THE, particularly to suitable piping contact accompaniment method for joining by welding piping member such as instrumentation nozzles to the pressure vessel.
【０００２】[0002]
【従来の技術】従来の原子力プラント等の圧力容器の計
装ノズルの取付け構造を図５に示す。図に示すごとく、
圧力容器胴体１に取付ける計装ノズル２は、その目的か
ら水などの液体に接触しても腐食されない材料を用いて
作る必要がある。そのため、計装ノズル２をステンレス
またはインコネル等の材料を用いて作製し、これを低合
金鋼よりなる圧力容器胴体１に取付ける場合には、圧力
容器胴体１に貫通孔９を設け、この貫通孔９の内面に圧
力容器内の水などが接触しないように、貫通孔９の全長
にわたって耐食性材料からなる計装ノズル２を差し込
み、圧力容器胴体１の内側の胴体内面クラッド５と接す
る貫通孔９の周縁部で、継手用肉盛溶接部３、継手溶接
部４によって接合する構造としている。なお、従来の圧
力容器の配管溶接構造としては、特開昭６３−６８２７
１号公報、同６３−８０９７２号公報等が挙げられる。2. Description of the Related Art FIG. 5 shows a conventional mounting structure of an instrumentation nozzle of a pressure vessel of a nuclear power plant or the like. As shown in the figure,
The instrumentation nozzle 2 attached to the pressure vessel body 1 needs to be made of a material that does not corrode even if it comes into contact with a liquid such as water for the purpose. Therefore, when the instrumentation nozzle 2 is made of a material such as stainless steel or Inconel and is attached to the pressure vessel body 1 made of low alloy steel, the through hole 9 is provided in the pressure vessel body 1 and the through hole 9 is provided. An instrumentation nozzle 2 made of a corrosion-resistant material is inserted over the entire length of the through-hole 9 so that water or the like in the pressure vessel does not come into contact with the inner surface of the pressure vessel 9. At the peripheral portion, the joint is welded by the weld overlay 3 and the joint weld 4. A conventional pressure vessel piping welding structure is disclosed in JP-A-63-6827.
Nos. 1 and 63-80972.
【０００３】[0003]
【発明が解決しようとする課題】上述したごとく、従来
技術における原子力プラント等の圧力容器に取付けられ
る計装ノズル等の配管部材の接合構造は、例えば図５に
示すように、圧力容器胴体１の内側で、継手用肉盛溶接
部３および継手溶接部４によって取付けられるが、この
溶接部は、いずれも部分溶込み溶接構造であるために溶
接による残留応力の発生が高く応力腐食割れが発生しや
すいという問題があった。As described above, the joining structure of piping members such as instrumentation nozzles attached to a pressure vessel of a nuclear power plant or the like in the prior art is, for example, as shown in FIG. On the inner side, it is attached by the weld overlay 3 for joints and the weld joint 4 for joints. Since both of these welds have a partial penetration welded structure, residual stress due to welding is high and stress corrosion cracking occurs. There was a problem that it was easy.
【０００４】本発明の目的は、上記従来技術における問
題点を解消するものであって、原子力プラント等の圧力
容器胴体へ取付ける計装ノズル等の配管部材の溶接位置
を、圧力容器の胴体の外側に設け、溶接部の構造を、応
力の発生の少ない完全溶込み溶接構造として応力腐食割
れを抑制し、かつ低合金鋼からなる圧力容器の貫通孔の
内面を、ステンレス鋼、インコネル等の耐食性材料でク
ラッドして腐食割れを防止することができる原子力プラ
ント等の圧力容器の配管接合方法を提供することにあ
る。SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems in the prior art. The welding position of a piping member such as an instrumentation nozzle to be mounted on a body of a pressure vessel of a nuclear power plant or the like is determined by setting the welding position on the outside of the body of the pressure vessel. The structure of the welded part is a full penetration welded structure with low stress generation to suppress stress corrosion cracking, and the inner surface of the through hole of the pressure vessel made of low alloy steel is made of corrosion resistant material such as stainless steel, inconel etc. in is to provide a piping joining method of the pressure vessel, such as a nuclear power plant can be clad to prevent corrosion cracking.
【０００５】[0005]
【課題を解決するための手段】上記本発明の目的を達成
するために、低合金鋼からなる原子力プラント等の圧力
容器胴体の貫通孔に計装ノズル等の配管部材を取付ける
場合に、配管部材の溶接位置を上記圧力容器胴体の外側
とし、応力の発生の少ない完全溶込み溶接構造にして応
力腐食割れを抑制し、上記圧力容器の貫通孔の内面を、
ステンレス、インコネルなどの耐食性材料を用いてクラ
ッドして、圧力容器内の液体の接触による腐食割れの発
生を防止する構造とするものである。原子力プラント等
の圧力容器に設ける耐食性材料からなる計装ノズル等の
配管部材を、圧力容器胴体の貫通孔に差し込まない構造
とすると、低合金鋼によって構成されている圧力容器の
貫通孔の内面が露出し、圧力容器内の液体と接触して腐
食などによるクラックが発生しやすくなるので好ましく
ない。したがって、圧力容器に設けられた貫通孔の内面
を、ステンレスやインコネル等の耐食性材料で被覆すれ
ば上記の問題点は解消される。しかし、貫通孔の径が小
さく、長さが長いため、その内面を耐食性材料で溶接等
により被覆することが従来技術では困難であったが、最
近では小型のトーチを使用した自動ＴＩＧ溶接機が開発
され、内径が約４０ｍｍ程度であれば、十分に内面の肉
盛溶接を行うことが可能である。また、他の方法として
耐食性スリーブ材を貫通孔の内面に貼り付け、アークで
溶融して被覆する方法も開発されている。このような方
法で、貫通孔の内面を耐食性材料で被覆することによ
り、計装ノズル等の配管部材を原子力プラント等の圧力
容器胴体の貫通孔に挿入して取付ける必要がなく、かつ
圧力容器胴体の外側に計装ノズル等の配管部材の溶接取
付け位置を設けることができるので、応力の発生の少な
い完全溶込み溶接が施工でき、応力腐食などによるクラ
ックの発生を抑制することが可能となる。本発明は原子
力プラント等の圧力容器の胴体貫通孔に配管部材を溶接
により接合する配管接合構造において、圧力容器胴体の
貫通孔の内面を耐食性材料により被覆し、圧力容器外側
の貫通孔の周縁部に、耐食性材料による肉盛溶接部を介
して耐食性材料からなる配管部材を完全溶込み溶接によ
り接合した構成とするものである。そして、本発明の配
管接合方法は、胴体内面を耐食性材料によりクラッドし
た圧力容器胴体に設けられた貫通孔の該圧力容器内側の
貫通孔周縁部に、耐食性材料を用いて継手溶接部を形成
する工程と、 上記貫通孔の内面および上記継手溶接部に
耐食性材料をクラッドする工程と、 上記圧力容器外側の
貫通孔周縁部に、耐食性材料を用いて肉盛溶接部を形成
する工程と、 上記肉盛溶接部に耐食性材料からなる配管
部材を完全溶込み溶接により接合する工程を少なくとも
含む圧力容器の配管接合方法とするものである。In order to achieve the object of the present invention, when a piping member such as an instrumentation nozzle is installed in a through hole of a body of a pressure vessel made of a low alloy steel such as a nuclear power plant, the piping member is provided. The welding position of the outside of the body of the pressure vessel, to reduce the stress corrosion cracking by a full penetration welding structure with less occurrence of stress, the inner surface of the through-hole of the pressure vessel,
The cladding is made of a corrosion-resistant material such as stainless steel or Inconel to prevent corrosion cracking due to contact of liquid in the pressure vessel. If piping members such as instrumentation nozzles made of corrosion-resistant materials provided in pressure vessels such as nuclear power plants are not inserted into the through holes of the pressure vessel body, the inner surface of the through holes of the pressure vessel made of low alloy steel It is not preferable because it is exposed and comes into contact with the liquid in the pressure vessel to easily cause cracks due to corrosion or the like. Therefore, if the inner surface of the through-hole provided in the pressure vessel is coated with a corrosion-resistant material such as stainless steel or Inconel, the above-mentioned problem is solved. However, because the diameter of the through hole is small and the length is long, it has been difficult in the prior art to coat the inner surface of the through hole with a corrosion-resistant material by welding or the like. Recently, an automatic TIG welding machine using a small torch has been developed. If it is developed and the inner diameter is about 40 mm, it is possible to sufficiently perform the overlay welding of the inner surface. As another method, a method has been developed in which a corrosion-resistant sleeve material is attached to the inner surface of the through-hole, and the coating is melted with an arc. By coating the inner surface of the through-hole with a corrosion-resistant material in such a manner, it is not necessary to insert a pipe member such as an instrumentation nozzle into the through-hole of a pressure vessel body of a nuclear power plant or the like, and to install the pressure vessel body. A welding position for a pipe member such as an instrumentation nozzle or the like can be provided on the outer side of the pipe, so that a full penetration welding with less stress can be performed, and the occurrence of cracks due to stress corrosion or the like can be suppressed. The present invention relates to a pipe joint structure in which a pipe member is joined to a through-hole of a pressure vessel of a nuclear power plant or the like by welding, wherein an inner surface of the through-hole of the pressure vessel body is covered with a corrosion-resistant material, and a peripheral portion of the through-hole outside the pressure vessel is provided. In addition, a pipe member made of a corrosion-resistant material is joined by full penetration welding via a build-up welded portion made of a corrosion-resistant material. In the pipe joining method of the present invention, the inside of the body is clad with a corrosion-resistant material.
Of the through-hole provided in the pressure vessel body
A joint weld is formed around the through hole using a corrosion-resistant material
To the inner surface of the through hole and the joint weld
A step of cladding the corrosion-resistant material ,
Overlay welds are formed around the through holes using corrosion resistant materials
And a pipe made of a corrosion-resistant material at the overlay weld
At least the step of joining members by full penetration welding
And a pressure vessel piping method .
【０００６】[0006]
【作用】図１に示すごとく、原子力プラント等の圧力容
器胴体１に取付ける計装ノズル２の貫通孔の内面に、耐
食性材料を肉盛溶接または耐食性材料からなるスリーブ
を挿入してアークなどで溶融させることにより、計装ノ
ズル２を圧力容器胴体１を貫通させる必要がなくなり、
計装ノズル２の溶接位置を圧力容器胴体１の外側に設け
ることができるので、計装ノズル２を取付ける溶接構造
を部分溶込み溶接とすることなく、計装ノズル２を圧力
容器胴体１の外側で完全溶込み溶接を施工することがで
き、溶接構造の健全性を一段と向上させることができ
る。また、計装ノズル２を取換えまたは補修する場合に
おいても、従来の溶接作業性の悪い圧力容器胴体１の内
側に取付けた計装ノズル２の補修を行うことなく、圧力
容器胴体１の外側で、溶接トーチの接近性および作業性
よく、完全溶込み溶接を極めて容易に実施することがで
きる。As shown in FIG. 1, a corrosion-resistant material is welded or a sleeve made of a corrosion-resistant material is inserted into the inner surface of a through hole of an instrumentation nozzle 2 attached to a pressure vessel body 1 of a nuclear power plant or the like and melted by an arc or the like. This eliminates the need for the instrumentation nozzle 2 to penetrate the pressure vessel body 1,
Since the welding position of the instrumentation nozzle 2 can be provided outside the pressure vessel body 1, the instrumentation nozzle 2 can be attached to the outside of the pressure vessel body 1 without making the welding structure for mounting the instrumentation nozzle 2 a partial penetration weld. With this, complete penetration welding can be performed, and the soundness of the welded structure can be further improved. Further, even when the instrumentation nozzle 2 is replaced or repaired, the instrumentation nozzle 2 attached to the inside of the conventional pressure vessel body 1 having poor welding workability is not repaired, but is repaired outside the pressure vessel body 1. With good accessibility and workability of the welding torch, complete penetration welding can be performed very easily.
【０００７】[0007]
【実施例】以下に本発明の実施例を挙げ、図面を用いて
さらに詳細に説明する。 〈実施例１〉図１に、計装ノズル２を圧力容器胴体に完
全溶込み溶接により取付ける構造の一例を示す。図にお
いて、計装ノズル２の貫通孔の内面に耐食性材料クラッ
ド７を溶接により施工し、また計装ノズル２を、原子力
プラント等の圧力容器胴体１に完全溶込み溶接ができる
ようにするために、圧力容器胴体１の外表面に耐食性材
料肉盛溶接部６を設け、その上に計装ノズル２を完全溶
込み溶接部８によって取付ける構造とするものである。
上記構造により、計装ラインの内面がすべて耐食性材料
で被覆することができ、圧力容器内の液体の接触による
腐食の発生を防止することができ、かつ構造的にも部分
溶込み溶接部を無くして応力の発生の少ない完全溶込み
溶接構造とすることができるので、計装ノズル２の取付
け部の応力腐食割れなどを抑制することができ、計装ノ
ズル２の取付け部の健全性を一段と向上させることがで
きた。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in more detail with reference to the drawings. <Embodiment 1> FIG. 1 shows an example of a structure in which an instrumentation nozzle 2 is attached to a pressure vessel body by complete penetration welding. In the figure, a corrosion-resistant material clad 7 is applied to the inner surface of the through hole of the instrumentation nozzle 2 by welding, and the instrumentation nozzle 2 can be completely penetrated and welded to the pressure vessel body 1 of a nuclear power plant or the like. The corrosion resistant material overlay welding portion 6 is provided on the outer surface of the pressure vessel body 1, and the instrumentation nozzle 2 is mounted thereon by a complete penetration welding portion 8.
With the above structure, the entire inner surface of the instrumentation line can be coated with a corrosion-resistant material, corrosion can be prevented from occurring due to the contact of liquid in the pressure vessel, and the partial penetration welded portion can be eliminated structurally. And a complete penetration welding structure with less stress can be achieved, so that stress corrosion cracking and the like at the mounting portion of the instrumentation nozzle 2 can be suppressed, and the soundness of the mounting portion of the instrumentation nozzle 2 is further improved. I was able to.
【０００８】〈実施例２〉本実施例においては、本発明
の圧力容器の配管取付け構造を、従来構造の計装ノズル
の補修または改修を行う場合においても容易に適用する
ことができる場合について説明する。図２ないし図４
は、本発明の圧力容器の配管接合構造に補修する場合の
手順を示す模式図である。図２は、圧力容器胴体１に取
付けられた既設の計装ノズル２を取り除いた状態を示
す。図３は、計装ノズル２を取り除いた後、貫通孔９の
内面に耐食性材料クラッド７を施した状態を示す。この
耐食性材料クラッド７の施工は、溶接後の熱処理が不要
なテンパービード溶接方法を採用した。図４は、図３の
耐食性材料クラッド７を施工した圧力容器胴体１の計装
ノズル２の取付け部の表面に、耐食性材料肉盛溶接部６
を施工し、計装ノズル２を完全溶込み溶接部８で接合す
る。なお、耐食性材料肉盛溶接部６の施工においてもテ
ンパービード溶接を用いることが好ましい。<Embodiment 2> In this embodiment, a description will be given of a case where the pipe mounting structure for a pressure vessel of the present invention can be easily applied even when repairing or modifying a conventional instrumentation nozzle. I do. 2 to 4
FIG. 3 is a schematic diagram showing a procedure for repairing the piping joint structure of the pressure vessel of the present invention. FIG. 2 shows a state where the existing instrumentation nozzle 2 attached to the pressure vessel body 1 is removed. FIG. 3 shows a state in which the corrosion-resistant material clad 7 is applied to the inner surface of the through hole 9 after the instrumentation nozzle 2 is removed. For the application of the corrosion-resistant material clad 7, a temper bead welding method that does not require heat treatment after welding was adopted. FIG. 4 shows a corrosion-resistant material build-up welded portion 6 on the surface of the mounting portion of the instrumentation nozzle 2 of the pressure vessel body 1 on which the corrosion-resistant material clad 7 of FIG.
Is performed, and the instrumentation nozzle 2 is joined at the full penetration welded portion 8. In addition, it is preferable to use temper bead welding also in the construction of the corrosion resistant material overlay welding portion 6.
【０００９】[0009]
【発明の効果】本発明の圧力容器の配管取付け構造によ
れば、計装ラインにおける液体接触部は、すべて耐食性
材料により構成されるので腐食の問題は無くなり、また
計装ノズル等の配管部材の取付部が圧力容器の外側で完
全溶込み溶接構造とするため、溶接部の残留応力の発生
が小さく、かつ溶接欠陥が無くなり健全な溶接構造が得
られ、原子力プラント等の圧力容器の安全性が一段と向
上する。According to the pressure vessel piping mounting structure of the present invention, since the liquid contact portions in the instrumentation line are all made of a corrosion-resistant material, there is no problem of corrosion, and the piping members such as instrumentation nozzles are not affected. Since the mounting part has a completely penetration welded structure outside the pressure vessel, the generation of residual stress in the welded part is small, welding defects are eliminated, and a healthy welded structure is obtained, and the safety of pressure vessels such as nuclear power plants is improved. Improve further.
【図１】本発明の実施例１で例示した圧力容器の配管接
合構造の構成を示す断面図。FIG. 1 is a cross-sectional view illustrating a configuration of a pipe joining structure of a pressure vessel exemplified in a first embodiment of the present invention.
【図２】本発明の実施例２で例示した従来構造のものを
本発明の圧力容器配管接合構造に改修する場合の工程を
示す模式図。FIG. 2 is a schematic view showing steps in a case where the conventional structure illustrated in the second embodiment of the present invention is modified into a pressure vessel piping joint structure of the present invention.
【図３】本発明の実施例２で例示した従来構造のものを
本発明の圧力容器配管接合構造に改修する場合の工程を
示す模式図。FIG. 3 is a schematic view showing steps in a case where the conventional structure exemplified in the second embodiment of the present invention is modified into a pressure vessel piping joint structure of the present invention.
【図４】本発明の実施例２で例示した従来構造のものを
本発明の圧力容器配管接合構造に改修する場合の工程を
示す模式図。FIG. 4 is a schematic view showing steps in a case where the conventional structure exemplified in the second embodiment of the present invention is modified to the pressure vessel piping joint structure of the present invention.
【図５】従来の圧力容器の配管接合構造の構成を示す断
面図。FIG. 5 is a cross-sectional view showing a configuration of a conventional pressure vessel piping connection structure.
１…圧力容器胴体 ２…計装ノズル（配管部材） ３…継手用肉盛溶接部 ４…継手溶接部 ５…胴体内面クラッド ６…耐食性材料肉盛溶接部 ７…耐食性材料クラッド ８…完全溶込み溶接部 ９…貫通孔 DESCRIPTION OF SYMBOLS 1 ... Pressure vessel main body 2 ... Instrumentation nozzle (piping member) 3 ... Overlay welding part for joints 4 ... Joint welding part 5 ... Cladding inner surface cladding 6 ... Corrosion resistant material overlay welding part 7 ... Corrosion resistant material cladding 8 ... Complete penetration Welded part 9: Through hole
フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) B23K 9/028 B23K 9/00 B23K 9/04 G21C 13/00 Continuation of front page (58) Fields investigated (Int. Cl. 7 , DB name) B23K 9/028 B23K 9/00 B23K 9/04 G21C 13/00
Claims (1)
圧力容器胴体に設けられた貫通孔の該圧力容器内側の貫
通孔周縁部に、耐食性材料を用いて継手溶接部を形成す
る工程と、 上記貫通孔の内面および上記継手溶接部に耐食性材料を
クラッドする工程と、 上記圧力容器外側の貫通孔周縁部に、耐食性材料を用い
て肉盛溶接部を形成する工程と、 上記肉盛溶接部に耐食性材料からなる配管部材を完全溶
込み溶接により接合する工程を少なくとも含むことを特
徴とする 圧力容器の配管接合方法。 (1)The inside of the fuselage was clad with a corrosion-resistant material
A through hole formed in the pressure vessel body,
Form a joint weld using a corrosion-resistant material at the periphery of the through hole
Process, Corrosion resistant material is applied to the inner surface of the through hole and the joint weld.
A step of cladding, Using a corrosion-resistant material at the periphery of the through-hole outside the pressure vessel
Forming a weld overlay by welding; Completely weld the pipe member made of corrosion-resistant material
At least the step of joining by butt welding.
Sign Pressure vessel piping connectionMethod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25138092A JP3267338B2 (en) | 1992-09-21 | 1992-09-21 | Pressure vessel piping connection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25138092A JP3267338B2 (en) | 1992-09-21 | 1992-09-21 | Pressure vessel piping connection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0699274A JPH0699274A (en) | 1994-04-12 |
| JP3267338B2 true JP3267338B2 (en) | 2002-03-18 |
Family
ID=17221977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25138092A Expired - Fee Related JP3267338B2 (en) | 1992-09-21 | 1992-09-21 | Pressure vessel piping connection method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3267338B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101825817B1 (en) * | 2016-07-08 | 2018-02-05 | 두산중공업 주식회사 | Maintenance method for welding part of small pipe for nuclear reactor |
| KR101842356B1 (en) * | 2016-07-08 | 2018-03-26 | 두산중공업 주식회사 | Maintenance method for welding part of small pipe for nuclear reactor |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4660875B2 (en) * | 2000-03-10 | 2011-03-30 | 株式会社Ihi | Replacement method for RPV nozzle joint members |
| JP5979665B2 (en) * | 2012-08-13 | 2016-08-24 | 三菱日立パワーシステムズ株式会社 | Method for welding tube body to header and welded structure in which tube body is welded to header |
| CN106112225B (en) * | 2016-08-02 | 2018-07-06 | 中国石油大学(华东) | A kind of Nozzle Zone of Vessels for reducing welding residual stress and end socket connection method |
-
1992
- 1992-09-21 JP JP25138092A patent/JP3267338B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101825817B1 (en) * | 2016-07-08 | 2018-02-05 | 두산중공업 주식회사 | Maintenance method for welding part of small pipe for nuclear reactor |
| KR101842356B1 (en) * | 2016-07-08 | 2018-03-26 | 두산중공업 주식회사 | Maintenance method for welding part of small pipe for nuclear reactor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0699274A (en) | 1994-04-12 |
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