JPH0687897U - Structure of lower mirror penetration part of reactor pressure vessel - Google Patents
Structure of lower mirror penetration part of reactor pressure vesselInfo
- Publication number
- JPH0687897U JPH0687897U JP028383U JP2838393U JPH0687897U JP H0687897 U JPH0687897 U JP H0687897U JP 028383 U JP028383 U JP 028383U JP 2838393 U JP2838393 U JP 2838393U JP H0687897 U JPH0687897 U JP H0687897U
- Authority
- JP
- Japan
- Prior art keywords
- lower mirror
- overlay
- pressure vessel
- mirror
- inconel
- 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
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
Abstract
(57)【要約】
【目的】 配管の外周面と下鏡の内面とにわたって施さ
れた肉盛部の付根部に発生する熱応力を低減することが
できる原子炉圧力容器の下鏡貫通部の構造を提供するこ
とにある。
【構成】 原子炉圧力容器の低合金鋼製の下鏡にステン
レス鋼製の配管が貫通していて、かつ、前記下鏡の内面
にインコネルによるクラッドが施され、前記配管の外周
面と該下鏡の内面とにわたって肉盛が施されている下鏡
貫通部の構造において、前記肉盛が該下鏡と同材質の低
合金鋼からなり、しかも、該下鏡の内面のその部分のク
ラッドが削除されていて前記肉盛が該下鏡の内面と直接
接着しており、かつ、その肉盛の周面を覆っているイン
コネルからなる耐食膜を備えている。
(57) [Summary] [Purpose] The lower mirror penetration part of the reactor pressure vessel that can reduce the thermal stress generated at the root part of the built-up part that is provided over the outer peripheral surface of the pipe and the inner surface of the lower mirror To provide the structure. [Structure] A stainless steel pipe penetrates a lower alloy steel lower mirror of a reactor pressure vessel, and an inner surface of the lower mirror is clad with Inconel to form an outer peripheral surface of the pipe and the lower surface. In the structure of the lower mirror penetrating portion that is overcoated with the inner surface of the mirror, the overlay is made of a low alloy steel of the same material as the lower mirror, and the cladding of that portion of the inner surface of the lower mirror is It has been removed and the overlay is directly bonded to the inner surface of the lower mirror, and is provided with a corrosion resistant film made of Inconel covering the peripheral surface of the overlay.
Description
【０００１】[0001]
本考案は、原子炉圧力容器の下鏡貫通部の構造に関するもので、詳しくは、原 子炉圧力容器の低合金鋼製の下鏡にステンレス鋼製のノズル配管などが貫通して いて、かつ、前記下鏡の内面にインコネルによるクラッドが施され、前記配管の 外周面と該下鏡の内面とにわたって肉盛が施されている下鏡貫通部の構造に関す るものである。 The present invention relates to the structure of the lower mirror penetrating portion of a reactor pressure vessel, and more specifically, the lower mirror made of low alloy steel of the nuclear reactor pressure vessel has a nozzle pipe made of stainless steel and the like. The present invention relates to a structure of a lower mirror penetration portion in which a clad made of Inconel is applied to an inner surface of the lower mirror, and a cladding is applied to an outer peripheral surface of the pipe and an inner surface of the lower mirror.
【０００２】[0002]
従来のこの種の原子炉圧力容器の下鏡貫通部の構造は、たとえば、図２に示す ようなものからなっている。 図２において、１１は原子炉圧力容器の低合金鋼製の下鏡、１２はステンレス 鋼製のノズル配管、１３は該下鏡１１の内面に施されたインコネルによるクラッ ド、１４は該ノズル配管１２の外周面と下鏡１１の内面とにわたってインコネル によって肉盛が施された肉盛部、１５はインコネルによる溶接継手部、１６は該 下鏡１１の内面への肉盛部１４の付根部である。 The structure of the lower mirror penetration part of a conventional reactor pressure vessel of this type is, for example, as shown in FIG. In FIG. 2, reference numeral 11 is a lower alloy steel lower mirror of a reactor pressure vessel, 12 is a stainless steel nozzle pipe, 13 is an Inconel cladding provided on the inner surface of the lower mirror 11, and 14 is the nozzle pipe. A weld overlay formed by Inconel over the outer peripheral surface of 12 and the inner surface of the lower mirror 11, a welded joint portion 15 by Inconel, and a root portion of the overlay 14 on the inner surface of the lower mirror 11. is there.
【０００３】[0003]
しかしながら、図２に示した従来の下鏡貫通部の構造においては、下鏡１１は 厚肉であって、材質は低合金鋼であり、肉盛部１４の材質は、低合金鋼とは熱膨 張係数の異なるインコネルであるため、運転の起動、停止等、過渡状態の場合に 、前記付根部１６に大きな熱応力が発生するという問題点があった。 However, in the structure of the conventional lower mirror penetrating portion shown in FIG. 2, the lower mirror 11 is thick, the material is low alloy steel, and the material of the built-up portion 14 is low alloy steel. Since the Inconel has different expansion coefficients, there is a problem that a large thermal stress is generated in the root portion 16 in the transient state such as the start and stop of the operation.
【０００４】 本考案は、上記のような問題点を解決しようとするものである。すなわち、本 考案は、配管の外周面と下鏡の内面とにわたって施された肉盛部の付根部に発生 する熱応力を低減することができる原子炉圧力容器の下鏡貫通部の構造を提供す ることを目的とするものでる。The present invention is intended to solve the above problems. That is, the present invention provides a structure of the lower mirror penetrating portion of the reactor pressure vessel capable of reducing the thermal stress generated at the root portion of the built-up portion provided over the outer peripheral surface of the pipe and the inner surface of the lower mirror. The purpose is to do so.
【０００５】[0005]
上記目的を達成するために、本考案は、原子炉圧力容器の低合金鋼製の下鏡に ステンレス鋼製の配管が貫通していて、かつ、前記下鏡の内面にインコネルによ るクラッドが施され、前記配管の外周面と該下鏡の内面とにわたって肉盛が施さ れている下鏡貫通部の構造において、前記肉盛が該下鏡と同材質の低合金鋼から なり、しかも、該下鏡の内面のその部分のクラッドが削除されていて前記肉盛が 該下鏡の内面と直接接着しており、かつ、その肉盛の周面を覆っているインコネ ルからなる耐食膜を備えているものとした。 In order to achieve the above-mentioned object, the present invention is such that a lower-alloy steel lower mirror of a reactor pressure vessel is penetrated by a stainless steel pipe, and an inner surface of the lower mirror is covered with an Inconel clad. In the structure of the lower mirror penetrating portion, which is applied to the outer peripheral surface of the pipe and the inner surface of the lower mirror, the overlay is made of a low alloy steel of the same material as the lower mirror, and The cladding of the inner surface of the lower mirror is removed, the overlay is directly adhered to the inner surface of the lower mirror, and a corrosion-resistant film made of Incone covering the peripheral surface of the overlay is formed. I had it.
【０００６】[0006]
本考案によれば、原子炉圧力容器の低合金鋼製の下鏡にステンレス鋼製の配管 が貫通していて、かつ、前記下鏡の内面にインコネルによるクラッドが施され、 前記配管の外周面と該下鏡の内面とにわたって肉盛が施されている下鏡貫通部の 構造において、前記肉盛が該下鏡と同材質の低合金鋼からなり、しかも、該下鏡 の内面のその部分のクラッドが削除されていて前記肉盛が該下鏡の内面と直接接 着しているので、該下鏡と肉盛部とは熱膨張係数が同じであり、したがって、そ の肉盛部の付根部には、応力の発生は殆んどない。 According to the present invention, a low-alloy steel lower mirror of a reactor pressure vessel is penetrated by a stainless steel pipe, and the inner surface of the lower mirror is clad with Inconel to form an outer peripheral surface of the pipe. And the inner surface of the lower mirror, the structure of the lower mirror penetrating portion is such that the overlay is made of a low alloy steel of the same material as the lower mirror, and that part of the inner surface of the lower mirror is Since the cladding is removed and the overlay is in direct contact with the inner surface of the lower mirror, the lower mirror and the overlay have the same coefficient of thermal expansion, and therefore the overlay's Almost no stress is generated at the root portion.
【０００７】[0007]
図１は本考案の一実施例を示している。 図１において、１は原子炉圧力容器の低合金鋼製の下鏡、２はステンレス鋼製 のノズル配管、３は該下鏡１の内面に施されたインコネルによるクラッド、４は 該ノズル配管２の外周面と下鏡１の内面とにわたって低合金鋼によって肉盛が施 された肉盛部、５は該肉盛部４の周面を覆っているインコネルからなる耐食膜、 ６はインコネルによる溶接継手部である。 FIG. 1 shows an embodiment of the present invention. In FIG. 1, 1 is a lower mirror of a reactor pressure vessel made of a low alloy steel, 2 is a nozzle pipe made of stainless steel, 3 is a clad made of Inconel on the inner surface of the lower mirror 1, 4 is the nozzle pipe 2 Of the overlay of the low-alloy steel over the outer peripheral surface of the lower mirror 1 and the inner surface of the lower mirror 1, 5 is a corrosion-resistant film made of Inconel covering the peripheral surface of the overlay 4, and 6 is welding by Inconel It is a joint part.
【０００８】 図１に示した原子炉圧力容器の下鏡貫通部の構造においては、ノズル配管２が 貫通している肉盛部４の材質が下鏡１の材質と同じ低合金鋼であり、かつ、該下 鏡１の内面のその部分のクラッド３が削除されて前記肉盛部４の付根部が該下鏡 １の内面と直接接着しているので、その付根部のところに熱応力は殆んど発生し ない。またその肉盛部４は低合金鋼であっても、その周面はインコネルによる耐 食膜５によって覆われており、さらに、ノズル配管２と該肉盛部４は前記耐食膜 ５の頂部でインコネルによる溶接継手部６で溶接されているので、前記下鏡１の 内側からみれば、該下鏡１の内面および肉盛部４はインコネルのクラッド３およ びインコネルの耐食膜６で覆われており、したがって、該下鏡１の内面および肉 盛部４は、炉水によって腐食されることが避けられるので、安全である。In the structure of the lower mirror penetrating portion of the reactor pressure vessel shown in FIG. 1, the material of the overlay portion 4 through which the nozzle pipe 2 penetrates is the same low alloy steel as the material of the lower mirror 1, Moreover, since the clad 3 at that portion of the inner surface of the lower mirror 1 is removed and the root portion of the build-up portion 4 is directly bonded to the inner surface of the lower mirror 1, thermal stress is not applied to the root portion. Almost never. Even if the overlay portion 4 is a low alloy steel, the peripheral surface thereof is covered with an anticorrosion film 5 made of Inconel, and the nozzle pipe 2 and the overlay portion 4 are the top parts of the anticorrosion film 5. Since they are welded at the welded joint portion 6 of Inconel, when viewed from the inside of the lower mirror 1, the inner surface of the lower mirror 1 and the overlay portion 4 are covered with the Inconel clad 3 and the Inconel corrosion resistant film 6. Therefore, the inner surface of the lower mirror 1 and the built-up portion 4 are safe from being corroded by the reactor water.
【０００９】[0009]
以上説明したように、本考案によれば、原子炉圧力容器の低合金鋼製の下鏡に ステンレス鋼製の配管が貫通していて、かつ、前記下鏡の内面にインコネルによ るクラッドが施され、前記配管の外周面と該下鏡の内面とにわたって肉盛が施さ れている下鏡貫通部の構造において、前記肉盛が該下鏡と同材質の低合金鋼から なり、しかも、該下鏡の内面のその部分のクラッドが削除されていて前記肉盛が 該下鏡の内面と直接接着しているので、該下鏡と肉盛部の付根部には、応力の発 生が殆んどない。 As described above, according to the present invention, the stainless steel pipe penetrates the lower alloy steel lower mirror of the reactor pressure vessel, and the cladding of Inconel is formed on the inner surface of the lower mirror. In the structure of the lower mirror penetrating portion, which is applied to the outer peripheral surface of the pipe and the inner surface of the lower mirror, the overlay is made of a low alloy steel of the same material as the lower mirror, and Since the cladding of that portion of the inner surface of the lower mirror is removed and the overlay is directly adhered to the inner surface of the lower mirror, no stress is generated at the root portion of the lower mirror and the overlay portion. Almost none.
【００１０】 さらに、前記肉盛の周面をインコネルからなる耐食膜で覆っているので、炉水 によって、腐食されることが避けられ、安全である。Further, since the peripheral surface of the overlay is covered with the corrosion-resistant film made of Inconel, it is safe to avoid being corroded by the reactor water.
【図１】本考案の一実施例を示した一部切欠正面断面図
である。FIG. 1 is a partially cutaway front sectional view showing an embodiment of the present invention.
【図２】従来の技術の一例を示した一部切欠正面断面図
である。FIG. 2 is a partially cutaway front sectional view showing an example of a conventional technique.
１ 下鏡 ２ ノズル配管 ３ クラッド ４ 肉盛部 ５ 耐食膜 1 Lower mirror 2 Nozzle piping 3 Cladding 4 Overlay 5 Corrosion resistant film
Claims (1)
テンレス鋼製の配管が貫通していて、かつ、前記下鏡の
内面にインコネルによるクラッドが施され、前記配管の
外周面と該下鏡の内面とにわたって肉盛が施されている
下鏡貫通部の構造において、前記肉盛が該下鏡と同材質
の低合金鋼からなり、しかも、該下鏡の内面のその部分
のクラッドが削除されていて前記肉盛が該下鏡の内面と
直接接着しており、かつ、その肉盛の周面を覆っている
インコネルからなる耐食膜を備えていることを特徴とす
る、原子炉圧力容器の下鏡貫通部の構造。1. A stainless steel pipe penetrates a lower alloy steel lower mirror of a reactor pressure vessel, and an inner surface of the lower mirror is clad with Inconel to form an outer peripheral surface of the pipe. In the structure of the lower mirror penetrating portion that is overlaid over the inner surface of the lower mirror, the overlay is made of a low alloy steel of the same material as the lower mirror, and the portion of the inner surface of the lower mirror is A clad is removed, the overlay is directly bonded to the inner surface of the lower mirror, and a corrosion resistant film made of Inconel covering the peripheral surface of the overlay is provided. Structure of lower mirror penetration part of furnace pressure vessel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP028383U JPH0687897U (en) | 1993-05-28 | 1993-05-28 | Structure of lower mirror penetration part of reactor pressure vessel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP028383U JPH0687897U (en) | 1993-05-28 | 1993-05-28 | Structure of lower mirror penetration part of reactor pressure vessel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0687897U true JPH0687897U (en) | 1994-12-22 |
Family
ID=12247137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP028383U Pending JPH0687897U (en) | 1993-05-28 | 1993-05-28 | Structure of lower mirror penetration part of reactor pressure vessel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0687897U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101231447B1 (en) * | 2010-01-18 | 2013-02-07 | 미츠비시 쥬고교 가부시키가이샤 | Tube stand installation structure |
-
1993
- 1993-05-28 JP JP028383U patent/JPH0687897U/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101231447B1 (en) * | 2010-01-18 | 2013-02-07 | 미츠비시 쥬고교 가부시키가이샤 | Tube stand installation structure |
| US8867688B2 (en) | 2010-01-18 | 2014-10-21 | Mitsubishi Heavy Industries, Ltd. | Nozzle mounting structure |
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