JP2998494B2 - Method of transporting impeller and shaft of internal pump - Google Patents
Method of transporting impeller and shaft of internal pumpInfo
- Publication number
- JP2998494B2 JP2998494B2 JP5145924A JP14592493A JP2998494B2 JP 2998494 B2 JP2998494 B2 JP 2998494B2 JP 5145924 A JP5145924 A JP 5145924A JP 14592493 A JP14592493 A JP 14592493A JP 2998494 B2 JP2998494 B2 JP 2998494B2
- Authority
- JP
- Japan
- Prior art keywords
- impeller
- shaft
- water
- internal pump
- transporting
- 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
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
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明はインターナルポンプのイ
ンペラ及びシャフトを水中から例えば補修室へ運搬する
方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention conveys an impeller and a shaft of an internal pump from underwater to, for example, a repair room.
About the method.
【０００２】[0002]
【従来の技術】改良型沸騰水型原子炉は、原子炉圧力容
器１４に内蔵され冷却材を循環させるインターナルポン
プ１２を有する。このインターナルポンプのインペラ９
とディフューザ２１は原子炉圧力容器に内蔵され、シャ
フト１０と一体になったインペラ９は下部モータ１３に
よって駆動される。2. Description of the Related Art An improved boiling water reactor has an internal pump 12 which is built in a reactor pressure vessel 14 and circulates a coolant. The impeller 9 of this internal pump
The diffuser 21 is built in the reactor pressure vessel, and the impeller 9 integrated with the shaft 10 is driven by the lower motor 13.
【０００３】インターナルポンプ１２のシャフト１０と
一体になったインペラ９の点検の際は、まず原子炉の運
転を停止し、原子炉ウェル内１８に水を満たして放射線
を遮蔽した後、作業フロア２０上から原子炉圧力容器内
１４に降ろしたインペラ専用の取扱装置１５で、原子炉
圧力容器１４から引き抜かれ、原子炉ウェル１８から使
用済燃料プール１９内のインぺラ点検区画へ移される。
通常はこの使用済燃料プール内で水中カメラを用いて目
視点検を行う。しかし、更に詳細に点検を行う必要があ
る場合、補修室内にインペラ９を移動する。補修室に移
動するには、放射性クラッドが付着したインペラを遮蔽
する必要がある。When inspecting the impeller 9 integrated with the shaft 10 of the internal pump 12, the operation of the reactor is first stopped, the reactor well 18 is filled with water to shield radiation, and then the work floor is The impeller is pulled down from the reactor pressure vessel 14 by the handling device 15 dedicated to the impeller which has been dropped into the reactor pressure vessel 14 from above, and is transferred from the reactor well 18 to the impeller inspection section in the spent fuel pool 19.
Normally, a visual inspection is performed using an underwater camera in this spent fuel pool. However, if more detailed inspection is required, the impeller 9 is moved into the repair room. In order to move to the repair room, it is necessary to shield the impeller with the radioactive cladding.
【０００４】インペラ及びシャフトのように放射性クラ
ッドが付着した物体を運搬するための容器として、例え
ば、使用済燃料を輸送するためのキャスクや、試験用燃
料や各種の照射材料試験片を輸送するための容器が一般
に知られている。[0004] Containers for transporting objects to which radioactive cladding is attached, such as impellers and shafts, for example, casks for transporting spent fuel, and transporting test fuels and various irradiation material test specimens. Are generally known.
【０００５】[0005]
【発明が解決しようとする課題】しかし、このキャスク
等のような縦長で上部から収納物を収納する容器では、
補修室へ搬入する際、スペースの制約から立てたままで
は移動が不可能であるため横転すると、遮蔽効果がある
水が流出するため密閉する必要があること、及び点検の
為には容器から取り出さなければならず、遮蔽をしたま
ま点検が実施できない。また、横型の容器に収納する際
には、剛性があり、垂直に吊り上げる機能しかない取扱
装置では、インペラ及びシャフトを横転させることは不
可能であるという問題がある。However, in a vertically long container such as a cask for storing articles from above,
When transporting to the repair room, it is impossible to move it upright due to space restrictions, so if it rolls over, water that has a shielding effect will flow out and it will be necessary to seal it. Inspection cannot be carried out with shielding. In addition, when stored in a horizontal container, there is a problem that it is impossible to roll over the impeller and the shaft with a handling device that has rigidity and only has a function of lifting vertically.
【０００６】その横転を可能としたものとして、特開平
5−126982 号公報に掲載されたものがある。これは、上
部開放型の水槽内にインペラ及びシャフトを横転させる
転倒装置を装備し、予め原子炉圧力容器内から取り外し
て使用済み燃料貯蔵プール内に水中で仮置きしたインペ
ラ及びシャフトを吊り上げ装置で水面上方に吊り上げ、
使用済み燃料貯蔵プール脇に置いた前記水槽内に転倒装
置で転倒させて収納し、水槽内の検査装置によってイン
ペラ及びシャフト等を検査するものである。 Japanese Patent Laid- Open Publication No.
There is one published in 5-126982. This is
Roll impeller and shaft in open-ended water tank
Equipped with a tipping device and removed from the reactor pressure vessel in advance
Temporarily placed underwater in the spent fuel storage pool
Raising the shaft and shaft above the water surface with a lifting device,
Falling over in the water tank placed beside the spent fuel storage pool
Put it down and store it, and install it with the inspection device in the water tank.
This is to inspect the prop, shaft, etc.
【０００７】しかし、この場合には、水槽にインペラ及
びシャフトを収納するまでに空中にインペラ及びシャフ
トが露出する機会が生じ、作業員の放射線被曝低減効果
が低い。 However, in this case, the impeller and the
Impeller and shuffle in the air before storing the shaft and shaft
The risk of exposure of workers to radiation
Is low.
【０００８】本発明の目的は、インペラ及びシャフトの
プール水中から運搬過程を経由して点検作業に至るまで
の過程で作業員の放射線被曝低減効果を向上することに
ある。An object of the present invention is to provide an impeller and a shaft.
From pool water to inspection work via transport process
In the process of improving the radiation exposure reduction effect of the worker .
【０００９】[0009]
【課題を解決するための手段】上記目的を達成するため
の手段は、水中に置かれた上部開放型の容器内へ、イン
ペラ及びシャフトを横にして収め、前記インペラ及びシ
ャフトを収納した前記容器を前記水中の水が入ったまま
前記水中から水面上方に吊り上げ、しかる後に前記イン
ペラ及びシャフトと前記水とを収納した前記容器を補修
室へ運搬するインターナルポンプのインペラ及びシャフ
トの運搬方法である。Means for accomplishing the above object is to provide a container in which an impeller and a shaft are laid sideways in an open-top container placed in water and the impeller and the shaft are housed. lifting the water upwardly from the water still contain the water in the water transport process der the impeller and the shaft of the internal pump for conveying the container containing the said water and said impeller and the shaft and thereafter into the repair chamber You.
【００１０】[0010]
【作用】上記の手段によれば、横転してインペラ及びシ
ャフトを水槽に上部から収納できるため、放射線遮蔽効
果のある水ごと使用済燃料プールから引き上げ、密閉を
せずに補修室等へ移動でき、また、水槽から取り出さず
にインペラ及びシャフトを点検が可能となる。 According to the above means, since the impeller and the shaft can be turned over and stored in the water tank from above, the water with radiation shielding effect can be lifted up from the spent fuel pool and moved to the repair room without sealing. Further, the impeller and the shaft can be inspected without removing the impeller and the shaft from the water tank.
【００１１】[0011]
【実施例】以下、本発明の実施例を図面を用いて説明す
る。Embodiments of the present invention will be described below with reference to the drawings.
【００１２】図１は本発明の運搬装置の一実施例の縦断
面図、図２は運搬装置の上面図、図３はインペラ及びシ
ャフトの取外し、及び運搬作業図である。FIG. 1 is a longitudinal sectional view of one embodiment of the transporting apparatus of the present invention, FIG. 2 is a top view of the transporting apparatus, and FIG. 3 is an operation view of the removal and transport of the impeller and the shaft.
【００１３】図３において、インターナルポンプ１２は
原子炉圧力容器１４の底部に取り付けられている。イン
ペラ９及びシャフト１０は下部モータ１３によって駆動
され、原子炉冷却材を循環させる。インペラ９及びシャ
フト１０の取扱装置１５は天井クレーン１６に取り付け
られており、インペラ９及びシャフト１０をインターナ
ルポンプ１２から取外す。シャフト１０の下部にはイン
ターナルポンプ１２への組み込み用ボルト１１，ボルト
１１を保護するためキャップ３が付いている。図１及び
図２において、横転用ラック１には横転するための回転
軸２が取り付けられている。水槽である内槽４には横転
用ラック１の横転用回転軸２を受ける溝を上端に備えた
スタンド５が設置されている。外槽６は内槽４よりも大
きく、内槽４を収納できるようになっている。また、移
動用の車輪７が取り付けられており、レール８上を移動
できるようになっている。In FIG. 3, the internal pump 12 is mounted on the bottom of the reactor pressure vessel 14. The impeller 9 and the shaft 10 are driven by the lower motor 13 to circulate the reactor coolant. The handling device 15 for the impeller 9 and the shaft 10 is attached to an overhead crane 16 and removes the impeller 9 and the shaft 10 from the internal pump 12. A lower part of the shaft 10 is provided with a bolt 11 to be incorporated into the internal pump 12 and a cap 3 for protecting the bolt 11. In FIGS. 1 and 2, a rotating shaft 2 for rolling over is mounted on a rollover rack 1. The inner tank 4, which is a water tank, has a groove for receiving the roll shaft 2 of the roll rack 1 at the upper end.
A stand 5 is provided. The outer tub 6 is larger than the inner tub 4 and can accommodate the inner tub 4. In addition, a moving wheel 7 is attached, and can move on the rail 8.
【００１４】インペラ９及びシャフト１０は点検の際に
は、まず原子炉の運転を停止し、原子炉ウェル１７に水
を満たし、放射線を遮蔽する。その後、作業フロア２０
上から原子炉圧力容器１４内に降ろしたインペラ専用の
取扱装置１５で、インペラ９及びシャフト１０が原子炉
圧力容器１４から引き抜かれ、原子炉ウェル１８から使
用済燃料プール１９内のインぺラ点検区画へ移される。
更に、補修室内に運び込む場合、取扱装置１５でインペ
ラ９を掴み上げ、回転軸２を有する横転用ラック１に収
納する。横転用ラック１に入れた後、取扱装置１５を外
し天井クレーン１６で内槽４に移動し、横転用ラック１
の軸２を内槽４内のスタンド５上端の溝にセットし、回
転軸２を中心として横転させる。横転用ラック１を横転
した後、天井クレーン１７で内槽４を水を入れたまま吊
り上げ、搬送用外槽６に収納し、補修室へレール８の上
を移動する。At the time of inspection, the impeller 9 and the shaft 10 first stop the operation of the reactor, fill the reactor well 17 with water, and shield radiation. Then, the work floor 20
The impeller 9 and the shaft 10 are pulled out of the reactor pressure vessel 14 by the handling device 15 dedicated to the impeller lowered into the reactor pressure vessel 14 from above, and the impeller inspection in the spent fuel pool 19 from the reactor well 18 is performed. Moved to parcel.
Further, when the impeller 9 is carried into the repair room, the impeller 9 is grasped by the handling device 15 and stored in the rollover rack 1 having the rotating shaft 2. After being placed in the rollover rack 1, the handling device 15 is removed and moved to the inner tank 4 by the overhead crane 16.
Is set in the groove at the upper end of the stand 5 in the inner tank 4 , and is turned over about the rotating shaft 2. After the rollover rack 1 is rolled over, the inner tub 4 is lifted with water in it by the overhead crane 17, stored in the outer tub 6 for transportation, and moved on the rail 8 to the repair room.
【００１５】内槽４へインペラ９及びシャフト１０は横
転して上部から収納される。そのため、遮蔽効果のある
水ごと使用済燃料プールから引き上げ、密閉せずに補修
室へ移動できる。また、内槽４は横置き上部開放型であ
るため、内槽４から取り出さずに点検が可能となる。[0015] The impeller 9 and the shaft 10 are stored in the inner tank 4 from the upper side while being turned sideways. Therefore, the water having the shielding effect can be lifted out of the spent fuel pool and moved to the repair room without sealing. In addition, since the inner tank 4 is of a horizontally placed upper open type, inspection can be performed without removing the inner tank 4 from the inner tank 4.
【００１６】[0016]
【発明の効果】本発明によれば、インペラ及びシャフト
を放射線遮蔽効果のあるプール水ごと水槽内に収納して
引き上げ、密閉せずに目的箇所へ移動でき、かつ、水槽
内でプール水による放射線遮蔽状態でインペラ及びシャ
フトの点検が可能となるから、インペラ及びシャフトの
プール水中から運搬過程を経由して点検作業に至るまで
の過程で作業員の放射線被曝低減効果を向上することが
出来る。According to the present invention , the impeller and the shaft can be stored together with the pool water having a radiation shielding effect in a water tank and lifted up, and can be moved to a target location without sealing, and the radiation caused by the pool water in the water tank can be achieved. Since the impeller and the shaft can be inspected in the shielded state, the radiation exposure reduction effect of the worker can be improved in the process from the pool water of the impeller and the shaft to the inspection work via the transportation process.
【図１】本発明の一実施例のインターナルポンプインペ
ラの運搬装置の縦断面図。FIG. 1 is a longitudinal sectional view of an internal pump impeller conveying device according to an embodiment of the present invention.
【図２】本発明の一実施例のインターナルポンプインペ
ラの運搬装置の上面図。FIG. 2 is a top view of a transport device of the internal pump impeller according to one embodiment of the present invention.
【図３】インペラ及びシャフトの取外し、運搬作業の説
明図。FIG. 3 is an explanatory view of a work of removing and transporting an impeller and a shaft.
１…横転用ラック、２…軸、４…内槽、５…軸受用溝、
６…外槽、７…車輪、８…レール、９…インペラ、１０
…シャフト。DESCRIPTION OF SYMBOLS 1 ... Rack for rollover, 2 ... Shaft, 4 ... Inner tank, 5 ... Groove for bearing,
6 ... outer tub, 7 ... wheels, 8 ... rails, 9 ... impeller, 10
…shaft.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) G21C 19/02 G21C 15/24 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 7 , DB name) G21C 19/02 G21C 15/24
Claims (1)
ンペラ及びシャフトを横にして収め、前記インペラ及び
シャフトを収納した前記容器を前記水中の水が入ったま
ま前記水中から水面上方に吊り上げ、しかる後に前記イ
ンペラ及びシャフトと前記水とを収納した前記容器を補
修室へ運搬するインターナルポンプのインペラ及びシャ
フトの運搬方法。An impeller and a shaft are placed sideways in an open-topped container placed in the water, and the container containing the impeller and the shaft is placed above the water surface while the water in the water remains in the container. A method of transporting an impeller and a shaft of an internal pump, which transports the container containing the impeller and the shaft and the water to a repair room after that.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5145924A JP2998494B2 (en) | 1993-06-17 | 1993-06-17 | Method of transporting impeller and shaft of internal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5145924A JP2998494B2 (en) | 1993-06-17 | 1993-06-17 | Method of transporting impeller and shaft of internal pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH075287A JPH075287A (en) | 1995-01-10 |
| JP2998494B2 true JP2998494B2 (en) | 2000-01-11 |
Family
ID=15396233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5145924A Expired - Lifetime JP2998494B2 (en) | 1993-06-17 | 1993-06-17 | Method of transporting impeller and shaft of internal pump |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2998494B2 (en) |
-
1993
- 1993-06-17 JP JP5145924A patent/JP2998494B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH075287A (en) | 1995-01-10 |
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