JPS646429B2 - - Google Patents
Info
- Publication number
- JPS646429B2 JPS646429B2 JP57125146A JP12514682A JPS646429B2 JP S646429 B2 JPS646429 B2 JP S646429B2 JP 57125146 A JP57125146 A JP 57125146A JP 12514682 A JP12514682 A JP 12514682A JP S646429 B2 JPS646429 B2 JP S646429B2
- Authority
- JP
- Japan
- Prior art keywords
- head
- main body
- jet pump
- head bolt
- lifting member
- 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
- 230000002093 peripheral effect Effects 0.000 claims description 12
- 230000007704 transition Effects 0.000 description 8
- 239000002826 coolant Substances 0.000 description 7
- 239000000725 suspension Substances 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 210000005069 ears Anatomy 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000009835 boiling Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000000737 periodic effect Effects 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
- Jet Pumps And Other Pumps (AREA)
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は沸騰水形原子炉のジエツトポンプのビ
ームを着脱する装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a device for attaching and detaching a beam of a jet pump of a boiling water nuclear reactor.
沸騰水形原子炉は第１図に示す如く原子炉圧力
容器１の内周面と炉心２を収容したシユラウド３
の外周面との間に複数台のジエツトポンプ４…が
設けられている。そしてこのジエツトポンプ４…
によつて原子炉圧力容器１内の冷却材が炉心２を
通つて強制的に再循環されるように構成されてい
る。そして、このジエツトポンプ４…は第２図に
示す如く冷却材供給管５と、この冷却材供給管５
の上端部に取付けられたトラジシヨンピース６
と、このトラジシヨンピース６に取付けられた一
対のノズル７，７と、これらノズル７，７の下方
に設けられたデイフユーザ８，８とから構成され
ている。そして、再循環ポンプ（図示せず）から
供給された高圧の冷却材は冷却材供給管５および
トラジシヨンピース６を通つてノズル７，７から
噴出され、周囲の冷却材とともにデイフユーザ
８，８内に流入し、原子炉圧力容器１の下部に送
られるように構成されている。そして、上記ノズ
ル７，７の取付構造は第３図に示す如く構成され
ている。すなわち、トラジシヨンピース６の上部
には一対の耳部６ａ，６ａが突設されている。そ
して、これら耳部６ａ，６ａの内側面にはそれぞ
れ嵌合凹部６ｂ，６ｂが形成されている。そし
て、上記ノズル７，７の上方を横断してビーム９
が設けられており、このビーム９の両端は上記嵌
合凹部６ｂ，６ｂ内に嵌合している。また、この
ビーム９の中央部にはボルト孔１０が形成され、
このボルト孔１０にはヘツドボルト１１が螺装さ
れている。このヘツドボルト１１は上記ボルト孔
１０に螺合するねじ部１１ａと断面六角形の頭部
１１ｂとから構成されている。そして、このヘツ
ドボルト１１の下端はノズル７の上面に当接し、
またリテーナ１２によりこのノズル７に対して抜
け止めがなされている。そして、このヘツドボル
ト１１を下方へ螺進させるように締付けることに
よりビーム９が上方に湾曲し、その弾性力によつ
てノズル７，７をトラジシヨンピース６に押圧固
定している。また、このヘツドボルト１１はキー
パ１３によつて回り止めがなされている。
As shown in FIG. 1, a boiling water reactor has an inner peripheral surface of a reactor pressure vessel 1 and a shroud 3 that houses a reactor core 2.
A plurality of jet pumps 4 are provided between the outer peripheral surface of the jet pump and the outer peripheral surface of the jet pump. And this jet pump 4...
The coolant in the reactor pressure vessel 1 is forced to be recirculated through the reactor core 2 by the reactor pressure vessel 1 . The jet pump 4... has a coolant supply pipe 5 and a coolant supply pipe 5 as shown in FIG.
Transition piece 6 attached to the upper end of
, a pair of nozzles 7, 7 attached to this transition piece 6, and diff users 8, 8 provided below these nozzles 7, 7. The high-pressure coolant supplied from the recirculation pump (not shown) passes through the coolant supply pipe 5 and the transition piece 6 and is ejected from the nozzles 7, 7, and enters the diffusers 8, 8 together with the surrounding coolant. It is configured to flow into the reactor pressure vessel 1 and be sent to the lower part of the reactor pressure vessel 1. The mounting structure for the nozzles 7, 7 is constructed as shown in FIG. That is, a pair of ears 6a, 6a are provided on the top of the transition piece 6 in a protruding manner. Fitting recesses 6b, 6b are formed on the inner surfaces of the ears 6a, 6a, respectively. Then, the beam 9 crosses above the nozzles 7, 7.
are provided, and both ends of this beam 9 fit into the fitting recesses 6b, 6b. Further, a bolt hole 10 is formed in the center of this beam 9,
A head bolt 11 is screwed into this bolt hole 10. This head bolt 11 is composed of a threaded portion 11a that is screwed into the bolt hole 10, and a head portion 11b having a hexagonal cross section. The lower end of this head bolt 11 comes into contact with the upper surface of the nozzle 7,
Further, the nozzle 7 is prevented from coming off by the retainer 12. By tightening the head bolt 11 in a downward spiral manner, the beam 9 curves upward, and its elastic force presses and fixes the nozzles 7 to the transition piece 6. Further, this head bolt 11 is prevented from rotating by a keeper 13.
ところで、上記ビーム９はノズル７，７から噴
出する高圧、大流量の冷却材の反力を受けるの
で、定期点検時等に取外して検査する。そして、
このビーム９の取外しは従来次のようにおこなつ
ていた。まず、原子炉圧力容器１の上方にある水
張りされた原子炉ウエルの水面上から長い柄の付
いた六角レンチを降ろし、ヘツドボルト１１をゆ
るめ、ビーム９を浮かせる。次にこのビーム９を
90゜回動し、その両端を耳部６ａ，６ａの嵌合凹
部６ｂ，６ｂから外す。次にヘツドボルト１１を
反対方向に回転させ、ビーム９を上方に移動させ
てヘツドボルト１１のねじ部１１ａから抜く。こ
の場合、ビーム９がヘツドボルト１１とともに回
転しないようにこのビーム９の回り止めをしてお
く。次にビーム９を把み具で把持し、このビーム
９を持ち上げてヘツドボルト１１の頭部１１ｂか
ら抜き、上方に吊り上げる。なお、このような作
業は原子炉ウエルの水面下約10ｍの水中において
水中テレビ等で監視しながら遠隔的におこなわれ
る。 By the way, since the beam 9 receives the reaction force of the high-pressure, large-flow coolant ejected from the nozzles 7, 7, it is removed and inspected during periodic inspections. and,
Conventionally, the beam 9 was removed as follows. First, a long-handled hexagonal wrench is lowered from above the water surface of the water-filled reactor well located above the reactor pressure vessel 1, the head bolt 11 is loosened, and the beam 9 is floated. Next, this beam 9
Rotate 90 degrees and remove both ends from the fitting recesses 6b, 6b of the ears 6a, 6a. Next, the head bolt 11 is rotated in the opposite direction, and the beam 9 is moved upward and removed from the threaded portion 11a of the head bolt 11. In this case, the beam 9 is prevented from rotating together with the head bolt 11. Next, the beam 9 is grasped with a gripping tool, lifted, removed from the head 11b of the head bolt 11, and lifted upward. This work will be carried out remotely, approximately 10 meters below the surface of the reactor well, while being monitored using underwater television.
従来の方法は作業手順が複雑であり、作業能率
が低かつた。また、ビーム９をヘツドボルト１１
のねじ部１１ａから抜いてから把み具で把持する
までの間は、このビーム９はヘツドボルト１１の
ねじ部１１ａの上に乗つているだけであるので、
このビーム９が原子炉圧力容器１の底部に落下し
てしまう可能性があつた。
Conventional methods have complicated work procedures and low work efficiency. Also, connect the beam 9 to the head bolt 11.
Since this beam 9 only rests on the threaded part 11a of the head bolt 11 from the time it is pulled out from the threaded part 11a until it is gripped with a gripping tool,
There was a possibility that this beam 9 would fall to the bottom of the reactor pressure vessel 1.
本発明はジエツトポンプのビームの着脱を容易
かつ能率的におこなうことができ、またビームの
落下を確実に防止することができるジエツトポン
プのビーム着脱装置を得ることにある。
SUMMARY OF THE INVENTION The object of the present invention is to provide a beam attachment/detachment device for a jet pump that can easily and efficiently attach and detach the beam of a jet pump and can reliably prevent the beam from falling.
本発明はジエツトポンプのビームに嵌合しこの
ビームの回り止めをなす本体と、この本体に回転
自在に設けられ筒状をなし内周面がジエツトポン
プのヘツドボルトの頭部に嵌合しまた外周面に上
記ビームのボルト孔に螺合するねじを有する吊上
部材とを具備したものである。したがつてこの本
体をビームに嵌合するとともに吊上部材をヘツド
ボルトの頭部に嵌合し、吊上部材を回転してヘツ
ドボルトをゆるめ、本体とともにビームを90゜回
転してこのビームの両端をトラジシヨンピースの
嵌合凹部から外すことができる。次に吊上部材を
反対方向に回転させヘツドボルトのねじ部からビ
ームを抜いてゆくと同時にこの吊上部材の外周の
ねじをビームのボルト孔に螺合して保持させ、こ
のビームを本体および吊上部材とともに吊り上げ
ることができる。よつてビームの取外し手順がき
わめて簡単となり、作業能率が向上する。また、
ビームはヘツドボルトのねじ部から抜けてゆくと
同時に吊上部材の外周面に形成されたねじに螺合
して保持されるので、このビームの落下を確実に
防止することができるものである。
The present invention includes a main body that fits into the beam of a jet pump to prevent the beam from rotating, and a rotatable main body that has a cylindrical shape and whose inner peripheral surface fits into the head of the head bolt of the jet pump and which has an outer peripheral surface. and a lifting member having a screw threaded into the bolt hole of the beam. Therefore, fit this main body to the beam, fit the lifting member to the head of the head bolt, rotate the lifting member to loosen the head bolt, and rotate the beam together with the main body by 90 degrees to secure both ends of the beam. It can be removed from the fitting recess of the transition piece. Next, rotate the suspension member in the opposite direction and remove the beam from the threaded part of the head bolt. At the same time, screw the outer circumferential screw of this suspension member into the bolt hole of the beam to hold it, and connect the beam to the main body and suspension. It can be lifted together with the upper member. Therefore, the procedure for removing the beam becomes extremely simple, improving work efficiency. Also,
At the same time as the beam comes out of the threaded portion of the head bolt, it is held by being screwed into the thread formed on the outer peripheral surface of the lifting member, so that it is possible to reliably prevent the beam from falling.
以下第４図および第６図を参照して本発明の一
実施例を説明する。図中１０１は本体であつて、
この本体１０１は上方からジエツトポンプのビー
ム９に嵌合し、このビーム９の回り止めをなすよ
うに構成されている。そして、この本体１０１内
には吊上部材１０２が設けられている。この吊上
部材１０２は筒状をなし、その内周面は第６図に
示す如くヘツドボルト１１の頭部１１ｂに嵌合す
るように断面六角形に形成され、また外周面には
ヘツドボルト１１のねじ部１１ａが螺合されるビ
ーム９のボルト孔１０に螺合するねじ１０３が形
成されている。なお、上記ヘツドボルト１１はそ
の頭部１１ｂの径よりねじ部１１ａの径の方が大
きいので、上述の如く吊上部材１０２の内面を頭
部に嵌合させ、かつこの吊上部材１０２の外周面
にボルト孔１０に螺合するねじ１０３を形成でき
るものである。また、上記本体１０１の上端部を
貫通してヘツド１０４が設けられ、このヘツド１
０４はブツシユ１０５によつて支持され、本体１
０１に対して回転自在に取付けられている。そし
て、上記の吊上部材１０２の上端はこのヘツド１
０４の下端に取付けられ、このヘツド１０４とと
もに回転自在となつている。また、このヘツド１
０４の上端部には連結部１０４ａが形成されてお
り、この連結部１０４ａには操作棒１０６の下端
が連結され、原子炉ウエルの水面上からこの操作
棒１０６を介してヘツド１０４および吊上部材１
０２を回転できるように構成されている。
An embodiment of the present invention will be described below with reference to FIGS. 4 and 6. In the figure, 101 is the main body,
This main body 101 is configured to fit into the beam 9 of the jet pump from above and prevent the beam 9 from rotating. A lifting member 102 is provided within this main body 101. This lifting member 102 has a cylindrical shape, and its inner peripheral surface is formed with a hexagonal cross section so as to fit into the head 11b of the head bolt 11, as shown in FIG. A screw 103 is formed to be screwed into a bolt hole 10 of the beam 9 into which the portion 11a is screwed. In addition, since the diameter of the threaded portion 11a of the head bolt 11 is larger than the diameter of the head 11b, the inner surface of the lifting member 102 is fitted into the head as described above, and the outer circumferential surface of the lifting member 102 is A screw 103 that is screwed into the bolt hole 10 can be formed in the bolt hole 10. Further, a head 104 is provided passing through the upper end of the main body 101, and this head 1
04 is supported by a bush 105, and the main body 1
It is rotatably attached to 01. The upper end of the above-mentioned lifting member 102 is connected to this head 1.
It is attached to the lower end of the head 104 and is rotatable together with the head 104. Also, this head 1
A connecting portion 104a is formed at the upper end of the reactor well, and the lower end of an operating rod 106 is connected to the connecting portion 104a, and the head 104 and the lifting member are connected from above the water surface of the reactor well via the operating rod 106. 1
02 can be rotated.
以上の如く構成された本発明の一実施例は、本
体１０１を水中作業機構（図示せず）の下端に装
着するとともにヘツド１０４の上端の連結部１０
４ａに操作棒１０６の下端を連結し、原子炉ウエ
ルの水面上から原子炉圧力容器内に吊り降ろす。
そして、本体１０１をジエツトポンプのビーム９
に嵌合し、また吊上部材１０２の内周面をヘツド
ボルト１１の頭部１１ｂに嵌合する。そして、操
作棒１０６を介して吊上部材１０２を回転し、ヘ
ツドボルト１１をゆるめる。次に本体１０１を回
転させてビーム９を約90゜回転させ、このビーム
９の両端部をトラジシヨンピースの耳部６ａ，６
ａの嵌合凹部６ｂ，６ｂから外す。次に吊上部材
１０２を回転してヘツドボルト１１を反対方向に
回転させ、ビーム９を上方に移動させる。そし
て、第４図および第５図に示す如くこのビーム９
がヘツドボルト１１の回転に伴つて上方に移動し
てゆき、ヘツドボルト１１のねじ部１１ａから抜
けてゆくと、このビーム９のボルト孔１０は吊上
部材１０２の外周面に形成されたねじ１０３に螺
合してゆく。なお、この場合本体１０１は回転不
能に固定しておき、ビーム９の回り止めをなす。
そして、さらに吊上部材１０２を回転し、ビーム
９のボルト孔１０をヘツドボルト１１のねじ部１
１ａから完全に抜く。なお、この状態ではビーム
９のボルト孔１０は吊上部材１０２の外周面のね
じ１０３に完全に螺合し、保持される。そして、
本体１０１を上昇させ、ビーム９を吊り上げる。
なお、ヘツドボルト１１はリテーナ１２によつて
ノズル７に対して抜け止めがなされているので、
ノズル７とともに残る。 In one embodiment of the present invention configured as described above, the main body 101 is attached to the lower end of an underwater working mechanism (not shown), and the connecting portion 10 at the upper end of the head 104 is attached to the lower end of the underwater working mechanism (not shown).
4a is connected to the lower end of the operating rod 106, and suspended from above the water surface of the reactor well into the reactor pressure vessel.
Then, the main body 101 is connected to the beam 9 of the jet pump.
and the inner peripheral surface of the lifting member 102 is fitted to the head 11b of the head bolt 11. Then, the lifting member 102 is rotated via the operating rod 106 to loosen the head bolt 11. Next, the main body 101 is rotated to rotate the beam 9 by about 90 degrees, and both ends of the beam 9 are connected to the ears 6a, 6 of the transition piece.
Remove it from the fitting recesses 6b, 6b of a. Next, the lifting member 102 is rotated, the head bolt 11 is rotated in the opposite direction, and the beam 9 is moved upward. Then, as shown in FIGS. 4 and 5, this beam 9
As the beam 9 moves upward as the head bolt 11 rotates and comes out of the threaded portion 11a of the head bolt 11, the bolt hole 10 of the beam 9 is screwed into a screw 103 formed on the outer peripheral surface of the lifting member 102. go together. In this case, the main body 101 is fixed unrotatably to prevent the beam 9 from rotating.
Then, the lifting member 102 is further rotated, and the bolt hole 10 of the beam 9 is connected to the threaded part 1 of the head bolt 11.
Completely remove from 1a. In this state, the bolt hole 10 of the beam 9 is completely screwed into the screw 103 on the outer peripheral surface of the lifting member 102 and is held. and,
The main body 101 is raised and the beam 9 is lifted up.
Note that since the head bolt 11 is prevented from coming off from the nozzle 7 by the retainer 12,
It remains together with nozzle 7.
なお、ビーム９を取付ける場合は上記と逆の手
順でおこなう。 In addition, when installing the beam 9, perform the procedure in reverse to the above.
上述の如く本発明はジエツトポンプのビームに
嵌合しこのビームの回り止めをなす本体と、この
本体に回転自在に設けられ筒状をなし内周面がジ
エツトポンプのヘツドボルトの頭部に嵌合しまた
外周面に上記ビームのボルト孔に螺合するねじを
有する吊上部材とを具備したものである。したが
つてこの本体をビームに嵌合するとともに吊上部
材をヘツドボルトの頭部に嵌合し、吊上部材を回
転してヘツドボルトをゆるめ、本体とともにビー
ムを90゜回転してこのビームの両端をトラジシヨ
ンピースの嵌合凹部から外すことができる。次に
吊上部材を反対方向に回転させヘツドボルトのね
じ部からビームを抜いてゆくと同時にこの吊上部
材の外周のねじをビームのボルト孔に螺合して保
持させ、このビームを本体および吊上部材ととも
に吊り上げることができる。よつてビームの取外
し手順がきわめて簡単となり、作業能率が向上す
る。また、ビームはヘツドボルトのねじ部から抜
けてゆくと同時に吊上部材の外周面に形成された
ねじに螺合して保持されるので、このビームの落
下を確実に防止することができる等その効果は大
である。
As described above, the present invention includes a main body that fits into the beam of a jet pump and prevents the beam from rotating, and a cylindrical body rotatably provided on the main body whose inner circumferential surface fits into the head of the head bolt of the jet pump. The suspension member is provided with a lifting member having a screw on the outer circumferential surface that is screwed into the bolt hole of the beam. Therefore, fit this main body to the beam, fit the lifting member to the head of the head bolt, rotate the lifting member to loosen the head bolt, and rotate the beam together with the main body by 90 degrees to secure both ends of the beam. It can be removed from the fitting recess of the transition piece. Next, rotate the suspension member in the opposite direction and remove the beam from the threaded part of the head bolt. At the same time, screw the outer circumferential screw of this suspension member into the bolt hole of the beam to hold it, and connect the beam to the main body and suspension. It can be lifted together with the upper member. Therefore, the procedure for removing the beam becomes extremely simple, improving work efficiency. In addition, as the beam comes out of the threaded part of the head bolt, it is held by screwing into the thread formed on the outer circumferential surface of the lifting member, so the beam can be reliably prevented from falling. is large.
第１図ないし第３図はジエツトポンプの構成を
説明する図であつて、第１図は原子炉圧力容器の
概略的な縦断面図、第２図はジエツトポンプの正
面図、第３図は第２図の−線に沿う断面図で
ある。第４図ないし第６図は本発明の一実施例を
示し、第４図は縦断面図、第５図は第４図の−
線に沿う断面図、第６図は第４図の−線に
沿う断面図である。
４……ジエツトポンプ、７……ノズル、９……
ビーム、１１……ヘツドボルト、１０１……本
体、１０２……吊上部材、１０３……ねじ、１０
４……ヘツド。
Figures 1 to 3 are diagrams explaining the configuration of the jet pump, in which Figure 1 is a schematic vertical cross-sectional view of the reactor pressure vessel, Figure 2 is a front view of the jet pump, and Figure 3 is a schematic vertical cross-sectional view of the reactor pressure vessel. FIG. 3 is a sectional view taken along the - line in the figure. 4 to 6 show an embodiment of the present invention, FIG. 4 is a longitudinal sectional view, and FIG. 5 is a -
FIG. 6 is a sectional view taken along the - line in FIG. 4. 4... Jet pump, 7... Nozzle, 9...
Beam, 11... Head bolt, 101... Main body, 102... Lifting member, 103... Screw, 10
4... Head.
Claims (1)
の回り止めをなす本体と、この本体に回転自在に
設けられ筒状をなし内周面がジエツトポンプのヘ
ツドボルトの頭部に嵌合しまた外周面に上記ビー
ムのボルト孔に螺合するねじを有する吊上部材と
を具備したことを特徴とするジエツトポンプのビ
ーム着脱装置。1 A main body that fits into the beam of the jet pump and prevents the beam from rotating, and a cylindrical body rotatably provided on this main body whose inner peripheral surface fits into the head of the head bolt of the jet pump and whose outer peripheral surface is fitted with the beam. A beam attaching/detaching device for a jet pump, comprising a lifting member having a screw threaded into a bolt hole of the jet pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57125146A JPS5915894A (en) | 1982-07-20 | 1982-07-20 | Beam removable device for jet pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57125146A JPS5915894A (en) | 1982-07-20 | 1982-07-20 | Beam removable device for jet pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5915894A JPS5915894A (en) | 1984-01-26 |
| JPS646429B2 true JPS646429B2 (en) | 1989-02-03 |
Family
ID=14902999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57125146A Granted JPS5915894A (en) | 1982-07-20 | 1982-07-20 | Beam removable device for jet pump |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5915894A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62181168U (en) * | 1985-12-20 | 1987-11-17 |
-
1982
- 1982-07-20 JP JP57125146A patent/JPS5915894A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5915894A (en) | 1984-01-26 |
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