JPH0139077B2 - - Google Patents
Info
- Publication number
- JPH0139077B2 JPH0139077B2 JP54131242A JP13124279A JPH0139077B2 JP H0139077 B2 JPH0139077 B2 JP H0139077B2 JP 54131242 A JP54131242 A JP 54131242A JP 13124279 A JP13124279 A JP 13124279A JP H0139077 B2 JPH0139077 B2 JP H0139077B2
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- water supply
- thermal sleeve
- safe end
- spargeer
- 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
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 29
- 230000008646 thermal stress Effects 0.000 description 6
- 238000003466 welding Methods 0.000 description 4
- 239000000498 cooling water Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000010959 steel 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
- Y02E30/30—Nuclear fission reactors
Landscapes
- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
Description
【発明の詳細な説明】
本発明は、原子炉圧力容器等に冷却水を注入す
る給水ノズルに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a water supply nozzle for injecting cooling water into a nuclear reactor pressure vessel or the like.
一般に、原子炉圧力容器に冷却水を注入する給
水ノズルには、原子炉圧力容器内の温度に比較し
て低温の流体が流れる。したがつて、このような
給水ノズルに対しては、従来から上記の温度差に
対処するための構造が採られている。すなわち、
第１図に示すように、圧力容器の壁部１に設けら
れたノズル１ａにはその端部にセイフエンド部２
が固着されており、そのセイフエンド部の先端に
溶接等により固着されたサーマルスリーブ３が上
記ノズル１ａ内に同心的に配設され、そのサーマ
ルスリーブ３の先端が、圧力容器の内周に沿つて
配設された給水スパージヤ４に溶接等により固着
されている。 Generally, a fluid at a low temperature compared to the temperature inside the reactor pressure vessel flows through a water supply nozzle that injects cooling water into the reactor pressure vessel. Therefore, such water supply nozzles have conventionally been constructed to cope with the above-mentioned temperature difference. That is,
As shown in FIG. 1, a nozzle 1a provided on the wall 1 of the pressure vessel has a safe end portion 2 at its end.
is fixed, and a thermal sleeve 3 fixed by welding or the like to the tip of the safe end is concentrically disposed within the nozzle 1a, and the tip of the thermal sleeve 3 extends along the inner circumference of the pressure vessel. It is fixed to the provided water supply spargeer 4 by welding or the like.
しかし、セイフエンド部２とサーマルスリーブ
３の結合が単純な冷し嵌め構造の場合には、ノズ
ル１の内面とサーマルスリーブ３の外面との間隙
に炉水より低温の給水が漏洩侵入したり、この間
隙内の炉水がサーマルスリーブ３の熱伝導により
冷却され、これらの低温水と高温炉水との流れに
よつて、ノズル１ａ内面に熱応力が発生する。 However, when the safe end part 2 and the thermal sleeve 3 are connected by a simple cold fitting structure, feed water at a temperature lower than the reactor water may leak into the gap between the inner surface of the nozzle 1 and the outer surface of the thermal sleeve 3. The reactor water in the gap is cooled by heat conduction through the thermal sleeve 3, and the flow of these low-temperature water and high-temperature reactor water generates thermal stress on the inner surface of the nozzle 1a.
本発明はこのような点に鑑み、ノズルの熱応力
を低減し、より信頼性の高い給水ノズルを提供す
ることを目的とする。 In view of these points, an object of the present invention is to reduce the thermal stress of the nozzle and provide a more reliable water supply nozzle.
以下、第２図を参照して本発明の一実施例につ
いて説明する。なお、第１図と同一部分について
は同一符号を付する。 An embodiment of the present invention will be described below with reference to FIG. Note that the same parts as in FIG. 1 are given the same reference numerals.
第２図において、ノズル１ａのセイフエンド部
２にはサーマルスリーブ３ａが溶接により固着さ
れており、そのサーマルスリーブ３ａはノズル１
ａのコーナ部からさらに圧力容器内側に突出され
ている。セイフエンド部２の配管側寄り内面に
は、不銹鋼５が内張りされており、その内面に給
水スパージヤ４の後端部が固着されている。 In FIG. 2, a thermal sleeve 3a is fixed to the safe end portion 2 of the nozzle 1a by welding, and the thermal sleeve 3a is attached to the nozzle 1.
It further protrudes inside the pressure vessel from the corner part of a. The inner surface of the safe end portion 2 closer to the piping side is lined with stainless steel 5, and the rear end portion of the water supply spargeer 4 is fixed to the inner surface.
しかして、セイフエンド部２にサーマルスリー
ブ３ａを溶接により固着しているため給水が直接
ノズル１ａの内面に接することなく、またノズル
１ａの内面付近の炉水と、給水との間には、サー
マルスリーブ３ａと給水スパージヤ４の二重の円
筒が存在するため、ノズル１ａ内面の冷却が緩和
される。したがつて、ノズル１ａ内面の熱応力が
低減でき、また給水スパージヤ４がセイフエンド
部２の配管側に近い所で固着されているため、セ
イフエンド部２の熱応力も低減せしめることがで
きる。さらにセイフエンド部２の内面の給水スパ
ージヤ４の固着部に不銹鋼５を内張りすれば、腐
食がより防止され、給水がサーマルスリーブ３ａ
内面に漏洩侵入することも防止される。 Since the thermal sleeve 3a is fixed to the safe end part 2 by welding, the water supply does not come into direct contact with the inner surface of the nozzle 1a, and there is no thermal sleeve between the reactor water near the inner surface of the nozzle 1a and the water supply. 3a and the water supply spargeer 4 exist, cooling of the inner surface of the nozzle 1a is alleviated. Therefore, the thermal stress on the inner surface of the nozzle 1a can be reduced, and since the water supply spargeer 4 is fixed close to the piping side of the safe end section 2, the thermal stress on the safe end section 2 can also be reduced. Furthermore, if the fixed part of the water supply spargeer 4 on the inner surface of the safe end part 2 is lined with stainless steel 5, corrosion can be further prevented and the water supply can be prevented from entering the thermal sleeve 3a.
It is also prevented from leaking into the inner surface.
以上説明したように本発明によれば、ノズルの
内面付近の炉水と給水との間に、サーマルスリー
ブと給水スパージヤ４との二重の円筒が存在する
ため、ノズル内面の熱応力を低減することがで
き、給水スパージヤをセイフエンド部の配管側寄
りで固着したことにより、セイフエンド部の熱応
力も低減し、健全性を向上せしめことができる等
の効果を奏する。 As explained above, according to the present invention, there is a double cylinder of the thermal sleeve and the water supply spargeer 4 between the reactor water and the feed water near the inner surface of the nozzle, so that thermal stress on the inner surface of the nozzle is reduced. By fixing the water supply spargeer near the piping side of the safe end part, the thermal stress of the safe end part can be reduced and the soundness of the safe end part can be improved.
第１図は従来の給水ノズルの断面図、第２図は
本発明による一実施例の給水ノズルの断面図であ
る。
１ａ……ノズル、２……セイフエンド部、３ａ
……サーマルスリーブ、４……給水スパージヤ、
５……不銹鋼。
FIG. 1 is a sectional view of a conventional water supply nozzle, and FIG. 2 is a sectional view of an embodiment of a water supply nozzle according to the present invention. 1a... Nozzle, 2... Safe end part, 3a
...Thermal sleeve, 4...Water supply spargear,
5... Rustless steel.
Claims (1)
ジヤを有する給水ノズルにおいて、ノズルのセイ
フエンド部に、ノズルの先端コーナ部から炉容器
内方に突出形成するサーマルスリーブを固着する
とともに、セイフエンド部の内面、配管側寄りに
給水スパージヤの後端部を固着したことを特徴と
する給水ノズル。1. In a water supply nozzle having a nozzle, a thermal sleeve, and a water supply spargeer, a thermal sleeve that protrudes from the tip corner of the nozzle toward the inside of the reactor vessel is fixed to the safe end of the nozzle, and a thermal sleeve is attached to the inner surface of the safe end, closer to the piping side. A water supply nozzle characterized in that the rear end of a water supply spargeer is fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13124279A JPS5654391A (en) | 1979-10-11 | 1979-10-11 | Feedwater nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13124279A JPS5654391A (en) | 1979-10-11 | 1979-10-11 | Feedwater nozzle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5654391A JPS5654391A (en) | 1981-05-14 |
| JPH0139077B2 true JPH0139077B2 (en) | 1989-08-17 |
Family
ID=15053320
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13124279A Granted JPS5654391A (en) | 1979-10-11 | 1979-10-11 | Feedwater nozzle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5654391A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60215754A (en) * | 1984-04-11 | 1985-10-29 | Nippon Kokan Kk <Nkk> | Manufacture of thermally sprayed layer having high hardness |
| EP0681301A1 (en) * | 1994-05-04 | 1995-11-08 | General Electric Company | Feedwater nozzle and method of repair |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4168071A (en) * | 1978-03-17 | 1979-09-18 | General Electric Company | Thermal isolator |
| JPS5430198B2 (en) * | 1972-11-15 | 1979-09-28 | ||
| JPS5583892A (en) * | 1978-12-20 | 1980-06-24 | Hitachi Ltd | Feedwater nozzle for reactor pressure vessel |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5430198U (en) * | 1977-08-01 | 1979-02-27 |
-
1979
- 1979-10-11 JP JP13124279A patent/JPS5654391A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5430198B2 (en) * | 1972-11-15 | 1979-09-28 | ||
| US4168071A (en) * | 1978-03-17 | 1979-09-18 | General Electric Company | Thermal isolator |
| JPS5583892A (en) * | 1978-12-20 | 1980-06-24 | Hitachi Ltd | Feedwater nozzle for reactor pressure vessel |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5654391A (en) | 1981-05-14 |
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