JPS608789A - Boiling water reactor pressure vessel with screwing type crdstub - Google Patents
Boiling water reactor pressure vessel with screwing type crdstubInfo
- Publication number
- JPS608789A JPS608789A JP58116203A JP11620383A JPS608789A JP S608789 A JPS608789 A JP S608789A JP 58116203 A JP58116203 A JP 58116203A JP 11620383 A JP11620383 A JP 11620383A JP S608789 A JPS608789 A JP S608789A
- Authority
- JP
- Japan
- Prior art keywords
- stub
- crd
- pressure vessel
- reactor pressure
- lower mirror
- 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
Landscapes
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
本発明は沸騰水形原子炉圧力容器に係り、符に容器（７
） 下’ｉｔＡ トＣＲＤ （ＣＯＮ ＴＲ０Ｌ ｕＯ
Ｄ−−ｆｔ１ｌＪ ｍｌ棒）スタブの接続構造に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a boiling water reactor pressure vessel.
) 下'itA トCRD (CON TR0L uO
D--ft1lJ ml rod) This relates to the connection structure of the stub.
まず第１図に従来例の、Ｃ１（、ｌ）スタブと原子炉圧
力容器下鏡との接合部近傍の構造を示す。First, FIG. 1 shows the structure of a conventional example near the joint between the C1 (, l) stub and the lower head of the reactor pressure vessel.
図において、１はＣＲＤスタブであり、２は下鏡である
。このＣ）ｌ、ＤスタブＩＫはＣＲＤハウジング５が嵌
合されている。Ｃ１（、ｌ）ハウジング５の内部には、
原子炉を制御するための重要な制御棒が挿入されており
、この為ＣＲＤスタブの取付精度は高いものが要求され
ている。In the figure, 1 is a CRD stub, and 2 is a lower mirror. The CRD housing 5 is fitted into the C)l and D stubs IK. Inside the C1(,l) housing 5,
Important control rods for controlling the nuclear reactor are inserted, and for this reason, high precision CRD stub installation is required.
ところで今Ｃ’ＲＤスタブ１を設けることなしに、ＣＲ
Ｄハウジング５を直接下鏡２に取り付けた場合を考えて
見る。この場合、内圧による影響が直接下鏡に及び（下
鏡の変形）、またＣＲＤハウジング５内部には低温の制
御棒出動用冷却水が流れているので炉水温度に支配され
る下鏡２との間に温度差を生じて大きな応力が発生し、
下鏡２の強度上厳しいものとなる。By the way, now without providing C'RD stub 1, CR
Let us consider the case where the D housing 5 is directly attached to the lower mirror 2. In this case, the lower mirror is directly affected by the internal pressure (deformation of the lower mirror), and since low-temperature control rod dispatch cooling water flows inside the CRD housing 5, the lower mirror 2 is affected by the reactor water temperature. A large stress is generated due to the temperature difference between the
This poses a severe problem in terms of the strength of the lower mirror 2.
これらｔ７）事情に゛より下鏡２とＣＲＤハウジング５
との間には緩衝の役目全果たすＣＨＤスタブ１が設けら
れているのである。Due to these t7) circumstances, the lower mirror 2 and CRD housing 5
A CHD stub 1 is provided between the two and the CHD stub 1, which serves as a buffer.
従来のＣ几りスタブｌと下鏡２との接合はどの様にして
行なわれていたかと言うと、図に示す様に溶着部３ｆｆ
：介して下鏡２に取り付けることによって行なわれてい
た。またＣＲＤスタブ１上端には溶着部４を介してＣＲ
Ｄハウジング５が取り付けられている。The conventional way of joining the C-shaped stub l and the lower mirror 2 is as shown in the figure.
: This was done by attaching it to the lower mirror 2 via the mirror. In addition, the upper end of the CRD stub 1 has a CR
D housing 5 is attached.
そしてこれら浴着部３，４を形成するに際しては、溶着
量の多い完全溶は込み溶接法が用いられている。このた
め浴着部形成時の、山側と谷側の溶着量の差に基く溶接
変形量が大きく、１８度の高いＣ几Ｄスタブ１の取り付
け、及び形状の保持のためには、特別の工夫をこらす必
要があり、製作性の悪いものとなっていた。When forming these bath welding parts 3 and 4, a full penetration welding method is used which allows for a large amount of welding. For this reason, when forming the bath welding part, the amount of welding deformation due to the difference in the amount of welding on the peak side and the valley side is large, and special measures are required to install the C-D stub 1 with a high angle of 18 degrees and maintain the shape. This required a lot of effort, making it difficult to manufacture.
本発明は以上述べた従来例の欠点に鑑みてなされたもの
であり、、ＣＲ１）スタブの機能を損なうことなく製作
精度の高い沸臓水形原子炉圧力容器を提供することを目
的とするものである。The present invention has been made in view of the above-mentioned drawbacks of the conventional examples, and an object of the present invention is to provide a boiling water reactor pressure vessel that can be manufactured with high precision without impairing the function of the CR1) stub. It is.
この目的を達成するために、本発明では、ＣＲＤスタブ
を下鏡にネジ込み、さらにＣＲＤスタブと下鏡とのネジ
込み部にシール溶接を施したものである。In order to achieve this object, in the present invention, the CRD stub is screwed into the lower mirror, and the threaded portion between the CRD stub and the lower mirror is seal-welded.
以下本発明を第２図、第３図に示す実施例に基づき説明
する。The present invention will be explained below based on the embodiments shown in FIGS. 2 and 3.
尚、第１図に示す従来例と同一個所は同一符号と１−る
。Note that the same parts as in the conventional example shown in FIG. 1 are designated by the same reference numerals.
まず第２図は第１実施例に係る要部縦断面図であるが、
この図から明らかな迎り、Ｃ几Ｄスタブ１の下部はネジ
部６になっている。また下鏡２についてもＣｉｔ Ｄ貫
通孔部にネジ加工が施されて（・る。このことにより、
（１−ｔＤスタブ１はネジ込み式で下鏡２に固定される
。ＣＲＤスタブｌと下鏡２の接続部、特に下鏡２の端面
とＣ几Ｄスタブ１の外周部でなす隅部にはネジ込み後シ
ール溶接が行なわれ、これによりシール溶接ｓ７を形成
する。First, FIG. 2 is a longitudinal sectional view of the main part according to the first embodiment,
As is clear from this figure, the lower part of the C-D stub 1 is a threaded portion 6. Also, for the lower mirror 2, the Cit D through hole is threaded.
(1-tD stub 1 is fixed to the lower mirror 2 with a screw-in type. After screwing, seal welding is performed, thereby forming a seal weld s7.
尚、ＣＲＤスタブ１の上端には従前通り、溶着部４を介
してＣＲＤ〕・ウジング５が取り付けられる。Note that a CRD housing 5 is attached to the upper end of the CRD stub 1 via a welded portion 4 as before.
本実施例によれは、ＣＲＤスタブ１と下鏡２と、の接続
部の強度は、ネジ部６で受け持つため、浴着量の多い完
全溶は込み溶接部（第１図の浴着部３）が不要となる。According to this embodiment, the strength of the connection between the CRD stub 1 and the lower mirror 2 is provided by the threaded portion 6, so that the fully penetrated welded portion with a large amount of bath coat (bath coat portion 3 in FIG. ) becomes unnecessary.
この為、ＣＲＤスタブ１の、下鏡２に対する浴接変形が
なくなり、原子炉圧力容器の製作性及び製作稍度葡高め
る効果がある。Therefore, deformation of the CRD stub 1 in contact with the lower mirror 2 is eliminated, which has the effect of improving the manufacturability and quality of the reactor pressure vessel.
第３図は第２実施例に係る第２図同様図であり、この実
施例では、Ｃ礼りヌタブ１は、下部及び上部にネジ加工
（ネジ部６．８）が施されている。FIG. 3 is a view similar to FIG. 2 relating to the second embodiment, and in this embodiment, the C-shaped nut tab 1 is threaded (threaded portions 6.8) at the lower and upper portions.
Ｃ几Ｄスタブ１の下鏡２への固定方法は、第２図に示す
第１実施例と同様にネジ込み式であり、Ｃ托Ｏスタブと
下鏡との接続部にはシール溶接部７が形成される。Ｃ１
（Ｄスタブ１の上端は、下部と同様ネジ込み式でＣＲＤ
ハウジング５が取り付けられ、Ｃ几Ｄスタブ１とＣＲＤ
ハウジング５との接続部には冷却水漏洩防止のためにシ
ール溶接が行なわれ、シール溶接部９が形成される。The method of fixing the C-type D stub 1 to the lower mirror 2 is a screw-in type similar to the first embodiment shown in FIG. is formed. C1
(The upper end of D stub 1 is a screw-in type like the lower part.
Housing 5 is installed, C-D stub 1 and CRD
Seal welding is performed at the connection with the housing 5 to prevent leakage of cooling water, and a seal weld 9 is formed.
本実施例によれば、ｃｉ（１）スタブ１と下鏡２及びＣ
ＲＤハウジング５との接続部の強度はネジ部６．８で受
け持ち、第１実施例同様、溶着量の多い完全篩は込み溶
接部（第１図の溶着部３，４）が不要となる。この為、
ＣＲＤスタブ１の下鏡２に対する浴接変形がなくなると
同時に、ＣＨＩ）スタブ１の板厚を薄く出来るという効
果がある。According to this embodiment, ci(1) stub 1, lower mirror 2 and C
The strength of the connection with the RD housing 5 is provided by the threaded portion 6.8, and as in the first embodiment, the complete sieve welded portion (welded portions 3 and 4 in FIG. 1), which has a large amount of welded material, is not required. For this reason,
This has the effect of eliminating the bath contact deformation of the CRD stub 1 with respect to the lower mirror 2, and at the same time, making it possible to reduce the thickness of the CHI stub 1.
本発明は以上述べた通りのものであり、本発明によれは
、ＣＲＤスタブ會下銃に取り付けるための多量の溶着量
が不要となり、このためＣ几Ｄスタブの下鏡への取り伺
は時溶接変形がな（なる。The present invention is as described above, and according to the present invention, a large amount of welding is not required for attaching the CRD stub to the lower gun, and therefore it is time consuming to inspect the lower mirror of the CRD stub. There is no welding deformation.
従ってＣ几りスタブＱ）取付相変向上が可能となる。Therefore, it is possible to improve the installation phase change of the C-cut stub Q).
またネジ構造であることから、据付が容易となる。Also, since it has a screw structure, installation is easy.
第１図は従来例に係るＣＲＤスタブと原子炉圧力容器下
鏡との接続部近傍の縦断面図、第２図は本発明の第１実
施例に係る第１図同様図、第３図は同第２実施例に係る
第１図同様図である。
ｌ・・・・・・ＣＢ、Ｄスタブ、２・・・・・・下鏡、
５・・・・・・ＣＲＤハウジング、７，９・・・・・・
シール溶接部。FIG. 1 is a vertical cross-sectional view of the vicinity of the connection between the CRD stub and the lower head of the reactor pressure vessel according to the conventional example, FIG. 2 is a view similar to FIG. 1 according to the first embodiment of the present invention, and FIG. It is a figure similar to FIG. 1 concerning the same 2nd Example. l...CB, D stub, 2...lower mirror,
5...CRD housing, 7,9...
Seal weld.
Claims (1)
の下鏡に螺合され、さらに下鏡との接続部にシール溶接
部を形成した（、ＲＤスタブ全有することを特徴とする
ネジ込み弐ＣＲＤスタブを有する沸騰水形原子炉圧力容
器。CRD housing inside? A boiler with two screwed CRD stubs is fitted and screwed onto the lower head of the reactor pressure vessel, and a seal weld is formed at the connection with the lower head (the boiler has a screw-in second CRD stub, which is characterized by having an entire RD stub). Water reactor pressure vessel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58116203A JPS608789A (en) | 1983-06-29 | 1983-06-29 | Boiling water reactor pressure vessel with screwing type crdstub |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58116203A JPS608789A (en) | 1983-06-29 | 1983-06-29 | Boiling water reactor pressure vessel with screwing type crdstub |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS608789A true JPS608789A (en) | 1985-01-17 |
Family
ID=14681386
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58116203A Pending JPS608789A (en) | 1983-06-29 | 1983-06-29 | Boiling water reactor pressure vessel with screwing type crdstub |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS608789A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011145271A (en) * | 2010-01-18 | 2011-07-28 | Mitsubishi Heavy Ind Ltd | Nozzle stub mounting structure |
| CZ306597B6 (en) * | 2011-10-11 | 2017-03-22 | Areva Gmbh | A security device for a steering rod in a nuclear facility |
-
1983
- 1983-06-29 JP JP58116203A patent/JPS608789A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011145271A (en) * | 2010-01-18 | 2011-07-28 | Mitsubishi Heavy Ind Ltd | Nozzle stub mounting structure |
| US8867688B2 (en) | 2010-01-18 | 2014-10-21 | Mitsubishi Heavy Industries, Ltd. | Nozzle mounting structure |
| CZ306597B6 (en) * | 2011-10-11 | 2017-03-22 | Areva Gmbh | A security device for a steering rod in a nuclear facility |
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