JPH053278Y2 - - Google Patents
Info
- Publication number
- JPH053278Y2 JPH053278Y2 JP1987023740U JP2374087U JPH053278Y2 JP H053278 Y2 JPH053278 Y2 JP H053278Y2 JP 1987023740 U JP1987023740 U JP 1987023740U JP 2374087 U JP2374087 U JP 2374087U JP H053278 Y2 JPH053278 Y2 JP H053278Y2
- Authority
- JP
- Japan
- Prior art keywords
- water
- narrow space
- injection nozzle
- main body
- body frame
- 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 - Lifetime
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 72
- 238000002347 injection Methods 0.000 claims description 33
- 239000007924 injection Substances 0.000 claims description 33
- 239000007921 spray Substances 0.000 claims description 11
- 238000005507 spraying Methods 0.000 claims 1
- 238000001179 sorption measurement Methods 0.000 description 7
- 230000003134 recirculating effect Effects 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 4
- 230000035882 stress Effects 0.000 description 4
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 230000008646 thermal stress Effects 0.000 description 3
- 238000005253 cladding Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 239000000941 radioactive substance Substances 0.000 description 2
- 238000009835 boiling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002345 surface coating layer Substances 0.000 description 1
- 239000002335 surface treatment layer Substances 0.000 description 1
- 238000003466 welding Methods 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
- Cleaning In General (AREA)
- Cleaning By Liquid Or Steam (AREA)
Description
【考案の詳細な説明】
「産業上の利用分野」
本考案は、二重管の間の空間部など、流体が滞
留し易い狭あい部の冷却、洗浄等に好適に使用さ
れる水噴射装置に関するものである。[Detailed description of the invention] "Industrial application field" This invention is a water injection device suitable for cooling and cleaning narrow spaces where fluid tends to accumulate, such as spaces between double pipes. It is related to.
「従来の技術」
一般に、原子力発電プラント、化学プラントに
設置された配管の溶接部においては、管内流体の
急激な温度変化に起因する熱応力の発生を防止す
るため、第３図に示すような二重管構造が適用さ
れている。``Prior art'' In general, in the welded parts of piping installed in nuclear power plants and chemical plants, in order to prevent the occurrence of thermal stress due to sudden temperature changes in the fluid inside the pipes, welds as shown in Figure 3 are used. A double tube structure is applied.
沸騰水型原子炉における冷却水の再循環系であ
ると、符号１は原子炉圧力容器の再循環水入口ノ
ズルであつて、この再循環水入口ノズル１には、
溶接部２を介して再循環水配管３が接続されてい
る。また、再循環水配管３の内側には、溶接部４
を介してサーマルスリーブ５が接続されており、
このサーマルスリーブ５と前記再循環水入口ノズ
ル１および再循環水配管３との間に空間部（以下
狭あい部という）６が存在することによつて、サ
ーマルスリーブ５内の流体の急激な温度変化の影
響が前記溶接部２に直接及ぶことがないようにな
つている。 In a cooling water recirculation system in a boiling water reactor, reference numeral 1 is a recirculation water inlet nozzle of a reactor pressure vessel, and this recirculation water inlet nozzle 1 includes:
A recirculating water pipe 3 is connected via the weld 2 . In addition, there is a welded part 4 inside the recirculation water pipe 3.
The thermal sleeve 5 is connected via
Due to the existence of a space (hereinafter referred to as a narrow space) 6 between the thermal sleeve 5, the recirculating water inlet nozzle 1, and the recirculating water piping 3, the temperature of the fluid within the thermal sleeve 5 increases rapidly. The effect of the change does not directly affect the welded portion 2.
「考案が解決しようとする問題点」
ところで、前述の例の二重管構造には、下記の
ような不具合がある。``Problems to be solved by the invention'' By the way, the double pipe structure of the above example has the following problems.
(a) 前記再循環水入口ノズル１および再循環水配
管３がオーステナイト系ステンレスにより形成
されている場合、溶接部２に対して残留応力改
善処理を行う必要があり、この処理は、溶接部
２の外側を高周波誘導加熱する一方、内側に冷
却水を循環させて冷却して、残留応力を打ち消
すような熱応力を生じさせるようにしている
が、このような処理を行なおうとする場合、前
記サーマルスリーブ５の外側の狭あい部６に冷
却水を十分に循環させることが難しい。すなわ
ち、溶接部２の内側の冷却が不十分なため、必
要な熱応力を発生させるに足る温度差を生じさ
せることができない。(a) When the recirculating water inlet nozzle 1 and the recirculating water piping 3 are made of austenitic stainless steel, it is necessary to perform residual stress improvement treatment on the welded portion 2. While high-frequency induction heating is applied to the outside, cooling water is circulated inside to generate thermal stress that cancels out residual stress. It is difficult to circulate cooling water sufficiently through the narrow space 6 on the outside of the thermal sleeve 5. That is, since the inside of the welded portion 2 is insufficiently cooled, a temperature difference sufficient to generate the necessary thermal stress cannot be generated.
(b) 前記狭あい部６には、液体が滞留し易く、し
たがつて、再循環水に含まれている放射性物質
が堆積して、該狭あい部６の線量が高くなる傾
向がある。また、堆積した放射性物質を例えば
水流によつて除去しようとしても、前記狭あい
部６に十分な洗浄水を送り込んで堆積物を洗い
流すことが難しい。(b) Liquid tends to accumulate in the narrow part 6, and therefore radioactive substances contained in the recirculated water tend to accumulate, increasing the dose in the narrow part 6. Further, even if an attempt is made to remove the deposited radioactive substances by using a water stream, for example, it is difficult to send sufficient cleaning water into the narrow space 6 to wash away the deposits.
そこで、前記狭あい部６に高速、高圧の水流
を噴射することが考えられるが、この場合、高
速、高圧の水噴射にともなつて生じる反力に抗
して水噴射ノズルをいかに支えるかという新た
な問題が生じる。 Therefore, it is conceivable to inject a high-speed, high-pressure water stream into the narrow space 6, but in this case, how to support the water injection nozzle against the reaction force generated with the high-speed, high-pressure water injection is a problem. A new problem arises.
本考案は上記事情に鑑みて提案されたもので、
二重管の間の空間部などのような狭あい部に十分
な量の水を循環させ得る水噴射装置を確実に所定
個所に固定することを目的とするものである。 This idea was proposed in view of the above circumstances.
The object of this invention is to reliably fix a water injection device in a predetermined location that can circulate a sufficient amount of water in a narrow space such as a space between double pipes.
「問題点を解決するための手段」
上記目的を達成するため、本考案は、一端が閉
塞され他端が開放された狭あい部の開放側に配設
された本体フレームに、狭あい部の閉塞側に向け
て水を噴射する水噴射ノズルと、該水噴射ノズル
と反対方向に水を噴射する逆噴射ノズルとを設け
るようにしたものである。"Means for Solving the Problems" In order to achieve the above object, the present invention provides a main body frame disposed on the open side of a narrow space with one end closed and the other end open. A water spray nozzle that sprays water toward the blocked side and a reverse spray nozzle that sprays water in the opposite direction to the water spray nozzle are provided.
「作用」
上記構成により、水噴射ノズルから狭あい間部
の奥まで水を送り込むことができるとともに、逆
噴射ノズルから噴射される水のエネルギーによ
り、水噴射ノズルからの水噴射の反力を相殺させ
て、本体フレームが狭あい部から離れようとする
動きを抑制する。"Operation" With the above configuration, water can be sent from the water injection nozzle to the depths of the narrow space, and the reaction force of the water injection from the water injection nozzle is offset by the energy of the water injected from the reverse injection nozzle. This suppresses the movement of the main body frame away from the narrow space.
「実施例」
以下、図面を参照して本考案の実施例を説明す
る。なお、図中従来例と共通の部分には同一符号
を付し、説明を簡略化する。"Embodiments" Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the figure, parts common to the conventional example are given the same reference numerals to simplify the explanation.
第１図および第２図は本考案の一実施例を示す
ものであつて、この一実施例の循環装置は、再循
環水入口ノズル１とサーマルスリーブ５との間の
狭あい部６の開口側の端部に、水噴射装置の本体
フレーム７を設けるようにした基本構成となつて
いる。 1 and 2 show one embodiment of the present invention, and the circulation device of this embodiment has an opening in a narrow space 6 between the recirculation water inlet nozzle 1 and the thermal sleeve 5. The basic configuration is such that the main body frame 7 of the water injection device is provided at the side end.
前記本体フレーム７は、その側面に設けられた
例えば電磁石などの吸着手段８により、二重管が
取り付けられた容器壁９に固定されている。な
お、この容器壁９は、例えば原子炉圧力容器の容
器壁であつて、その内面は、オーステナイト系ス
テンレスからなるクラツドと呼ばれる表面処理層
９ａによつて覆われている。 The main body frame 7 is fixed to a container wall 9 to which a double pipe is attached by adsorption means 8, such as an electromagnet, provided on its side surface. The vessel wall 9 is, for example, a vessel wall of a nuclear reactor pressure vessel, and its inner surface is covered with a surface treatment layer 9a called a clad made of austenitic stainless steel.
前記本体１０の内部には、水供給配管１０が接
続される流路１１が設けられている。この流路１
１は本体フレーム７の上方から下方へ水を送り込
むもので、その下端部には、第１図矢印イ方向に
水を噴射する水噴射ノズル１２が設けられてい
る。また、前記流路１１には、前記水噴射ノズル
１２と反対の方向（第１図矢印ロで示す）に向け
てそれぞれ水を噴射する複数の逆噴射ノズル１３
が設けられており、各逆噴射ノズル１３は、それ
ぞれ、吸着手段８，８、水噴射ノズル１２に位置
を合わせて配置されている。 A flow path 11 to which a water supply pipe 10 is connected is provided inside the main body 10 . This flow path 1
Reference numeral 1 supplies water from above to below the main body frame 7, and a water injection nozzle 12 is provided at the lower end of the main body frame 7 to spray water in the direction of arrow A in FIG. Further, in the flow path 11, a plurality of reverse injection nozzles 13 each inject water in a direction opposite to the water injection nozzle 12 (indicated by arrow B in FIG. 1).
are provided, and each reverse injection nozzle 13 is arranged in alignment with the suction means 8, 8 and the water injection nozzle 12, respectively.
以上のように構成された水噴射装置は、例え
ば、溶接部の残留応力改善処理、あるいは二重管
の洗浄などに際して、吸着手段８を利用して（電
磁石を通電することによつて）所定位置に固定し
て使用される。そして、この状態で流路１１内に
水を供給すると、水噴射ノズル１２から狭あい部
６内に高速、高圧の水が噴射されてその内部の冷
却、あるいは洗浄が行なわれる。 The water injection device configured as described above uses the suction means 8 (by energizing an electromagnet) to hold the water at a predetermined position when, for example, treating residual stress in a welded part or cleaning a double pipe. It is used fixedly. When water is supplied into the channel 11 in this state, high-speed, high-pressure water is injected from the water injection nozzle 12 into the narrow space 6 to cool or clean the inside thereof.
また、この一実施例では、本体フレーム７を固
定すべき容器壁内面がオーステナイト系ステンレ
ス鋼からなるクラツド９ａによつて覆われている
ため電磁石（吸着手段８）による吸着力が不充分
になるが、逆噴射ノズル１３から噴射される水の
運動エネルギーによつて前記反力の一部を相殺し
て、前記吸着手段８による吸着力の不足を補うこ
とができる。さらに、冷却能力、あるいは洗浄能
力を高めるべく、水供給配管１０から供給される
水量を増やすと、水噴射ノズル１２から噴射され
る水の運動エネルギーが増大するとともに、逆噴
射ノズル１３から噴射される水の運動エネルギー
も増加するから、水噴射に伴う反力の増減に対し
て、格別な調整を必要とすることなく、安定して
本体フレーム７を固定することができる。 Furthermore, in this embodiment, the inner surface of the container wall to which the main body frame 7 is to be fixed is covered with the cladding 9a made of austenitic stainless steel, so that the adsorption force by the electromagnet (adsorption means 8) is insufficient. A part of the reaction force can be offset by the kinetic energy of the water injected from the reverse injection nozzle 13, thereby making up for the lack of adsorption force by the adsorption means 8. Furthermore, when the amount of water supplied from the water supply pipe 10 is increased in order to increase the cooling capacity or the cleaning capacity, the kinetic energy of the water injected from the water injection nozzle 12 increases, and the water is injected from the reverse injection nozzle 13. Since the kinetic energy of the water also increases, the main body frame 7 can be stably fixed without requiring special adjustment in response to increases and decreases in reaction force due to water jetting.
なお、作業終了の後は、水の供給を停止させる
とともに、吸着手段８たる電磁石の通電を停止す
ることにより装置を取り外すことができる。 In addition, after the work is completed, the apparatus can be removed by stopping the water supply and stopping the energization of the electromagnet serving as the adsorption means 8.
「考案の変形実施例」
(i) 吸着手段の具体的構成は前記一実施例の電磁
石に限定されものではなく、他の方式を採用し
てもよい。"Modified Embodiment of the Invention" (i) The specific structure of the attraction means is not limited to the electromagnet of the above embodiment, and other systems may be adopted.
(ii) 水噴射ノズル、あるいは逆噴射ノズルの個数
は前記一実施例に限定されるものではなく、装
置の使用条件に応じて適宜変更してもよい。(ii) The number of water injection nozzles or reverse injection nozzles is not limited to the one embodiment described above, and may be changed as appropriate depending on the usage conditions of the apparatus.
(iii) 水噴射ノズル、あるいは逆噴射ノズルの入口
部に流量調整弁を設けて、両ノズルから噴射さ
れる水の絶対量、あるいは流量比を調整し得る
ようにしてもよい。(iii) A flow rate adjustment valve may be provided at the inlet of the water injection nozzle or the reverse injection nozzle, so that the absolute amount of water injected from both nozzles or the flow rate ratio may be adjusted.
「考案の効果」
以上の説明で明らかなように、本考案は、狭あ
い部の開放側の端部に配設される該本体フレーム
に、狭あい部の閉塞側に向けて水を噴射する水噴
射ノズルと、該水噴射ノズルと反対方向に水を噴
射する逆噴射ノズルとを設けるようにしたもので
ある例えば、残留応力改善処理において、冷却能
力を変更すべく水噴射ノズルの噴射量を調整しよ
うとして水供給配管の供給水量を増減させた際
に、水噴射ノズルに生じる反力に応じて逆噴射ノ
ズルによる反力も増減されることになり、格別な
調整を行うことなく両ノズルの運動エネルギーの
バランスを維持することができるという効果を奏
する。"Effect of the invention" As is clear from the above explanation, the present invention injects water toward the closed side of the narrow part on the main body frame disposed at the open end of the narrow part. It is equipped with a water injection nozzle and a reverse injection nozzle that injects water in the opposite direction to the water injection nozzle.For example, in residual stress improvement processing, the injection amount of the water injection nozzle is changed in order to change the cooling capacity. When the amount of water supplied from the water supply piping is increased or decreased in an attempt to make adjustments, the reaction force generated by the reverse injection nozzle will be increased or decreased in accordance with the reaction force generated in the water injection nozzle, and the movement of both nozzles will be adjusted without making any special adjustments. It has the effect of maintaining energy balance.
第１図および第２図は本考案の一実施例を示す
もので、第１図は２重管部の縦断面図、第２図は
第１図の−線に沿う矢視図、第３図は２重管
の一例としての原子炉圧力容器再循環水入口部分
を示す縦断面図である。
１……再循環水入口ノズル、２……溶接部、５
……サーマルスリーブ、６……狭あい部、７……
本体フレーム、８……吸着手段（電磁石）、９…
…容器壁、９ａ……表面被覆層（クラツド）、１
０……水供給配管、１１……流路、１２……水噴
射ノズル、１３……逆噴射ノズル。
1 and 2 show one embodiment of the present invention, in which FIG. 1 is a longitudinal sectional view of a double pipe section, FIG. 2 is a view taken along the - line in FIG. 1, and FIG. The figure is a longitudinal cross-sectional view showing a recirculated water inlet portion of the reactor pressure vessel as an example of a double pipe. 1...Recirculating water inlet nozzle, 2...Welding part, 5
...Thermal sleeve, 6...Narrow gap, 7...
Main body frame, 8... Adsorption means (electromagnet), 9...
...Container wall, 9a...Surface coating layer (cladding), 1
0... Water supply piping, 11... Channel, 12... Water injection nozzle, 13... Reverse injection nozzle.
Claims (1)
に水を循環させる装置において、前記狭あい部の
開放側に配設される本体フレームに、前記狭あい
部の閉塞側に向けて水を噴射する水噴射ノズルを
設けるとともに、該水噴射ノズルと反対方向に水
を噴射して前記本体フレームを狭あい部の閉塞側
に向けて付勢する逆噴射ノズルを設けたことを特
徴とする水噴射装置。 In a device that circulates water through a narrow space that is closed at one end and open at the other end, water is directed toward the closed side of the narrow space on a main body frame disposed on the open side of the narrow space. A water spraying device comprising: a water spray nozzle that sprays water; and a reverse spray nozzle that sprays water in a direction opposite to the water spray nozzle to urge the main body frame toward the closed side of the narrow space. Injection device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987023740U JPH053278Y2 (en) | 1987-02-20 | 1987-02-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987023740U JPH053278Y2 (en) | 1987-02-20 | 1987-02-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63133394U JPS63133394U (en) | 1988-08-31 |
| JPH053278Y2 true JPH053278Y2 (en) | 1993-01-26 |
Family
ID=30822319
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987023740U Expired - Lifetime JPH053278Y2 (en) | 1987-02-20 | 1987-02-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH053278Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5195727B2 (en) * | 2004-01-29 | 2013-05-15 | 株式会社日立製作所 | High-frequency heating residual stress improvement method cooling device, and high-frequency heating residual stress improvement method cooling effect confirmation method |
| US8514998B2 (en) | 2005-01-31 | 2013-08-20 | Hitachi-Ge Nuclear Energy, Ltd. | Induction heating stress improvement |
-
1987
- 1987-02-20 JP JP1987023740U patent/JPH053278Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63133394U (en) | 1988-08-31 |
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