JPH1164582A - Temporary shield device - Google Patents
Temporary shield deviceInfo
- Publication number
- JPH1164582A JPH1164582A JP23051297A JP23051297A JPH1164582A JP H1164582 A JPH1164582 A JP H1164582A JP 23051297 A JP23051297 A JP 23051297A JP 23051297 A JP23051297 A JP 23051297A JP H1164582 A JPH1164582 A JP H1164582A
- Authority
- JP
- Japan
- Prior art keywords
- shield
- molded
- wall
- rails
- wheels
- 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
Landscapes
- Lining And Supports For Tunnels (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は原子炉格納容器内の
高線量当量率である生体遮蔽壁(以下、BSWと称す
る)プラグ内作業において原子炉炉心部からの放射線の
影響を軽減するために用いる仮設遮蔽装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is intended to reduce the effects of radiation from a reactor core in a work inside a biological shield wall (hereinafter referred to as BSW) plug having a high dose equivalent rate in a reactor containment vessel. The present invention relates to a temporary shielding device to be used.
【0002】[0002]
【従来の技術】原子プラントでは原子炉の定期検査工事
で圧力容器継ぎ手部の点検を行う際にBSW内で作業を
実施しなければならないことがある。このエリアは原子
炉圧力容器(以下、RPVと称する)近傍での作業とな
るため炉心部の高線量当量率部からの影響により環境線
量当量率が高く、作業線量が増加することが避けられな
い。これらの高線量当量率のもとで行う作業は重要な作
業が多く含まれ、習熟した作業員に依存する割合が高く
なる。習熟した作業員の数は限られており、一部の作業
を遂行するためには習熟した作業員に線量が集中する懸
念がある。2. Description of the Related Art In a nuclear plant, it is sometimes necessary to carry out work in a BSW when inspecting a pressure vessel joint part in a periodic inspection work of a nuclear reactor. Since this area is to be operated near the reactor pressure vessel (hereinafter referred to as RPV), the environmental dose equivalent rate is high due to the influence of the high dose equivalent rate part in the core, and it is inevitable that the working dose will increase. . The work performed under these high dose equivalent rates includes many important works, and the proportion depending on skilled workers increases. The number of trained workers is limited, and there is a concern that doses may be concentrated on the trained workers to perform some tasks.
【0003】従来、作業は主要な線源に対する防護のた
めに本設および仮設の遮蔽を設置して実施するが、BS
W内のRPVノズルのまわりの作業ではBSWプラグ内
の主要線源近くの配管、ノズル等と共に、炉心部からの
線量当量率が影響する度合いが高くなっている。Conventionally, work is carried out by installing permanent and temporary shields for protection against major radiation sources.
In the work around the RPV nozzle in W, the degree of the dose equivalent rate from the core, as well as the pipes and nozzles near the main radiation source in the BSW plug, has a high degree of influence.
【0004】[0004]
【発明が解決しようとする課題】BSWプラグ内の主要
線源に近い配管、ノズル等からの放射線の影響を軽減す
るのは鉛板ないし鉛マットをこれらの要素に巻き付ける
ことで、十分な遮蔽効果を得ることが可能である。しか
しながら、炉心部からの放射線の影響を軽徴なものとす
るのにこうした鉛板等による方法は用いられず、有効な
対策が採れない。このため、作業者が高線量当量率のも
とでの作業を強いられ、早急な改善が求められている。The effect of radiation from pipes, nozzles, etc., close to the main radiation source in the BSW plug is reduced by winding a lead plate or a lead mat around these elements to provide a sufficient shielding effect. It is possible to obtain However, such a method using a lead plate or the like is not used to reduce the influence of radiation from the core, and no effective countermeasure can be taken. For this reason, workers are forced to work at a high dose equivalent rate, and urgent improvement is required.
【0005】そこで、本発明の目的はBSW内のRPV
ノズルまわりの作業で作業員が被爆することがなく、放
射線の影響を確実に免れるようにした仮設遮蔽装置を提
供することにある。Therefore, an object of the present invention is to provide an RPV in a BSW.
It is an object of the present invention to provide a temporary shielding device in which an operator is not exposed to radiation while working around a nozzle and is reliably prevented from being affected by radiation.
【0006】[0006]
【課題を解決するための手段】上記目的を達成するため
に本発明は底部、両側部および上部をBSWに当接して
固定される遮蔽体架台と、この遮蔽体架台に一端を支持
されると共に、他端をRPV外壁まで達するように横方
向に延長して形成される2本のレールと、この2本のレ
ール上に移動可能に設けられた成型遮蔽体とを備えるも
のである。SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a shield base fixed at a bottom, both sides and an upper part in contact with a BSW, and one end supported by the shield base. , Two rails extending in the lateral direction so as to reach the outer wall of the RPV, and a molded shield movably provided on the two rails.
【0007】このように構成した仮設遮蔽装置において
は高線量当量率のBSWプラグ内に立入ることなく、成
型遮蔽体をレールに沿って移動してRPV外壁近くに置
くことで炉心部からの放射線により作業員が被爆するの
を効果的に防ぐことが可能で、RPVノズルまわりの作
業での放射線の影響を確実に免れることが可能になる。
また、本発明は、望ましくはBSWに当接される遮蔽
体架台の底部に伸縮装置、両側面および上部に突っ張り
装置をそれぞれ設ける。[0007] In the temporary shielding device constructed as described above, the molded shield is moved along the rail and placed near the outer wall of the RPV without entering the high dose equivalent rate BSW plug, so that radiation from the reactor core can be obtained. Accordingly, it is possible to effectively prevent the worker from being exposed to the radiation, and it is possible to reliably avoid the influence of radiation in the work around the RPV nozzle.
Further, in the present invention, preferably, a telescopic device is provided at the bottom of the shield base that is in contact with the BSW, and a tension device is provided at both sides and at the top.
【0008】このように構成した仮設遮蔽装置において
は遮蔽体架台をBSWプラグに向かって伸びる伸縮装置
および突っ張り装置でBSWプラグの内面に突っ張って
固定することができ、遮蔽体架台を極めて強固に、かつ
安全にBSWプラグ内に固定することが可能になる。In the temporary shielding device configured as described above, the shield base can be stretched and fixed to the inner surface of the BSW plug by a telescopic device and a stretching device extending toward the BSW plug. And it can be fixed in the BSW plug safely.
【0009】さらに、発明は、望ましくはRPV外壁に
当てるレールの端部にカム装置を設ける。Further, the present invention provides a cam device at the end of the rail, preferably against the RPV outer wall.
【0010】このように構成した仮設遮蔽装置において
はカム装置の働きにより成型遮蔽体自身の荷重によりレ
ールをRPV外壁に固定することができる。In the temporary shielding device configured as described above, the rail can be fixed to the outer wall of the RPV by the load of the molded shield itself by the function of the cam device.
【0011】また、本発明は、望ましくはRPV外壁に
近いレールに成型遮蔽体をRPV外壁寄りに近づけて固
定するロック装置を設ける。The present invention also provides a locking device for fixing the molded shield to a rail near the RPV outer wall, preferably closer to the RPV outer wall.
【0012】このように構成した仮設遮蔽装置において
は成型遮蔽体をロック装置の働きによりRPV外壁近く
の所定の場所に固定することができ、移動形成型遮蔽体
の遮蔽効果が損なわれるのを防ぐことが可能である。In the temporary shielding device configured as described above, the molded shield can be fixed to a predetermined location near the outer wall of the RPV by the function of the lock device, thereby preventing the shielding effect of the movable forming shield from being impaired. It is possible.
【0013】さらに、本発明は成型遮蔽体が複数個の車
輪を備えた車輪付き成型遮蔽体からなり、成型遮蔽体を
レール上を転がる車輪により移動させるのが望ましい。Further, in the present invention, it is desirable that the molded shield comprises a wheeled molded shield having a plurality of wheels, and the molded shield is moved by wheels rolling on rails.
【0014】このように構成した仮設遮蔽装置において
は成型遮蔽体を作業者に負担をかけない僅かな力によっ
て移動させることが可能になる。[0014] In the temporary shielding device configured as described above, the molded shield can be moved by a small force that does not burden the operator.
【0015】また、本発明は、レールが多数の回転ロー
ラを備えたローラ付きレールからなり、成型遮蔽体を回
転ローラ上を滑らせて移動させるのが望ましい。Further, in the present invention, it is desirable that the rail is formed of a rail with rollers provided with a large number of rotating rollers, and the molded shield is moved by sliding on the rotating rollers.
【0016】このように構成した仮設遮蔽装置において
は成型遮蔽体を作業者により負担をかけない僅かな力に
よって移動させることができる。In the temporary shielding device constructed as described above, the molded shielding body can be moved by a small force without imposing a burden on the operator.
【0017】[0017]
【発明の実施の形態】以下、本発明の実施の形態を図面
を参照して説明する。図1において、仮設遮蔽装置にB
SWプラグ(図示せず)内に固定可能な大きさに形成さ
れる遮蔽体架台1を有する。この遮蔽体架台1は前側の
2本の架台脚2a、2bと後側の2本の架台脚3aとか
らなり、それぞれ架台脚2a、2b、3a、3bに設け
られる伸縮装置4によってBSWプラグ内において架台
高さが変えられるようになっている。また、双方の架台
脚2a、2b、3a、3bにわたるように2本のレール
5、6が設けられている。このレール5、6は架台脚2
a、2b、および架台脚3a、3bにわたす2本のビー
ム7、8によって支持され、各ビーム7の先端にある接
続金具9によってビーム長を変化させてレール5、6の
間の間隔が変えられるようになっている。この接続金具
9の連結にはボルトおよびナット10が用いられる。Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, the temporary shielding device is B
It has a shield base 1 formed in a size that can be fixed in a SW plug (not shown). The shield base 1 is composed of two front base legs 2a, 2b and two rear base legs 3a, and the inside of the BSW plug is controlled by a telescopic device 4 provided on each of the base legs 2a, 2b, 3a, 3b. The height of the gantry can be changed. Also, two rails 5, 6 are provided so as to extend over both of the pedestal legs 2a, 2b, 3a, 3b. These rails 5 and 6 are pedestal legs 2
a, 2b and supported by two beams 7, 8 extending over the pedestal legs 3a, 3b, the distance between the rails 5, 6 is changed by changing the beam length by connecting fittings 9 at the tip of each beam 7. It is supposed to be. Bolts and nuts 10 are used to connect the connection fittings 9.
【0018】さらに、架台脚2a、3aにはBSWプラ
グと相対する左側面の上下2箇所および上部、一方、架
台脚2b、3bにはBSWプラグと相対する右側面の上
下2箇所および上部に突っ張り装置11がそれぞれ設け
られている。また、レール4、5上面に沿ってBSWプ
ラグ内を前後に移動可能な車輪付き成型遮蔽体12が設
けられている。この車輪付き成型遮蔽体12には放射線
遮蔽のための成型鉛13が搭載されており、RPV外壁
14に合わせて成型鉛13を置くように構成されてい
る。レール5、6にはRPV外壁14にレール5、6を
固定するためのカム装置15が設けられる。Further, the pedestal legs 2a, 3a are attached to the upper and lower two locations and the upper portion of the left side opposed to the BSW plug, while the pedestal legs 2b and 3b are attached to the upper and lower two locations and the upper portion of the right side opposed to the BSW plug. A device 11 is provided for each. Further, a molded shield 12 with wheels is provided that can move back and forth in the BSW plug along the upper surfaces of the rails 4 and 5. A molded lead 13 for shielding radiation is mounted on the molded shield 12 with wheels, and the molded lead 13 is arranged in accordance with the RPV outer wall 14. The rails 5 and 6 are provided with a cam device 15 for fixing the rails 5 and 6 to the RPV outer wall 14.
【0019】また、図2に架台脚2a、2b、3a、3
bに装着される伸縮装置4の詳細を示している。この伸
縮装置4は架台脚2aの内側に配置される中空の支柱1
6と、この支柱6内に設けられた第1かさ歯車17およ
び第2かさ歯車18と、第1歯車17を連結される遠隔
操作用ハンドル19と、第2かさ歯車18と一体に結合
されたねじ20と、ねじ20と螺合している固定ナット
21とから構成されている。FIG. 2 shows the pedestal legs 2a, 2b, 3a, 3a.
3B shows details of the telescopic device 4 attached to b. This telescopic device 4 is a hollow column 1 arranged inside a pedestal 2a.
6, a first bevel gear 17 and a second bevel gear 18 provided in the column 6, a remote control handle 19 to which the first gear 17 is connected, and the second bevel gear 18. It is composed of a screw 20 and a fixing nut 21 screwed with the screw 20.
【0020】さらに、図3に架台脚2a、2b、3a、
3bに設けられる突っ張り装置11の詳細を示してい
る。この突っ張り装置11は枠材22と、この枠材22
内に設けられた第1かさ歯車23および第2かさ歯車2
4と、第1かさ歯車23と連結される遠隔装置用ハンド
ル25と、第2かさ歯車24と連結される突っ張り棒2
6と、この突っ張り棒26と螺合している固定ナット2
7とから構成されている。FIG. 3 shows the pedestal legs 2a, 2b, 3a,
3b shows details of a tension device 11 provided in 3b. The stretching device 11 includes a frame member 22 and the frame member 22.
First bevel gear 23 and second bevel gear 2 provided therein
4, a remote device handle 25 connected to the first bevel gear 23, and a bar 2 connected to the second bevel gear 24.
6 and a fixing nut 2 screwed with the strut 26
7 is comprised.
【0021】また、図4にレール5、6に設けられるカ
ム装置15の詳細を示している。このカム装置15はレ
ール5の先端にローラピン28を介して設けられたカム
29と、このカム29と連結されてカム29を上方に付
勢しているばね30とから構成されている。FIG. 4 shows details of the cam device 15 provided on the rails 5 and 6. The cam device 15 includes a cam 29 provided at the end of the rail 5 via a roller pin 28, and a spring 30 connected to the cam 29 and urging the cam 29 upward.
【0022】さらに、図5に車輪付き成型遮蔽体12を
固定するロック装置31を示している。このロック装置
31はレール5の下面に固定されたジャッキ32と、こ
のジャッキ32に搭載されたばね33を有するストッパ
34とからなる。なお、本図中、符号35は車輪付き成
型遮蔽体12に設けられた車輪を示している。FIG. 5 shows a lock device 31 for fixing the molded shield 12 with wheels. The lock device 31 includes a jack 32 fixed to the lower surface of the rail 5 and a stopper 34 having a spring 33 mounted on the jack 32. In this figure, reference numeral 35 indicates wheels provided on the molded shield 12 with wheels.
【0023】また、図6に伸縮装置4および突っ張り装
置11に用いられる遠隔操作用ハンドル19(25)の
詳細を示している。ハンドル19(25)には操作を滑
らかにするためのベアリング36と共に回転取手37が
設けられている。このハンドル19(25)は第1かさ
歯車17(23)に連結される手前側にハンドル19
(25)を真直ぐ第1かさ歯車17(23)に導く案内
部材38を有する。FIG. 6 shows details of the remote control handle 19 (25) used for the telescopic device 4 and the tension device 11. The handle 19 (25) is provided with a rotating handle 37 together with a bearing 36 for smooth operation. This handle 19 (25) is connected to the first bevel gear 17 (23) on the front side thereof.
It has a guide member 38 for guiding (25) straight to the first bevel gear 17 (23).
【0024】本実施の形態は上記構成からなり、RPV
ノズルまわりの作業を実施するにあたり、BSWプラグ
内に1本単位に分離された架台脚2a、2b、3a、3
bを搬入し、手前に架台脚2a、2bを配置し、奥に架
台脚3a、3bを配置して遮蔽体架台1に組み立てる。
遮蔽体架台1はそれぞれのビーム7、8を向き合わせ、
接続金具9でビーム7、8同士を連結する。このとき、
ノズルないし配管の口径寸法に合わせてビーム長を調節
し、その位置で接続金具9をボルト、ナット10により
固定する。The present embodiment has the above configuration, and
In carrying out the work around the nozzle, the pedestal legs 2a, 2b, 3a, 3 separated one by one in the BSW plug
b is carried in, the gantry legs 2a, 2b are arranged in the front, and the gantry legs 3a, 3b are arranged in the back, and assembled to the shield base 1.
The shield base 1 faces each beam 7, 8;
The connection metal 9 connects the beams 7 and 8 to each other. At this time,
The beam length is adjusted according to the diameter of the nozzle or pipe, and the connection fitting 9 is fixed at that position with bolts and nuts 10.
【0025】遮蔽体架台1とレール5、6との結合が終
了した後、レール5、6の先端をRPV外壁14に押し
付けて固定する。すなわち、レール5、6をRPV外壁
14に押し付けると、ローラピン28を中心としてカム
29が下方に回転し、レール5、6の下まで回転し、カ
ム29の上部がRPV外壁14に接した状態で遮蔽体架
台1が固定される。After the connection between the shield base 1 and the rails 5 and 6 is completed, the ends of the rails 5 and 6 are pressed against the RPV outer wall 14 to be fixed. That is, when the rails 5 and 6 are pressed against the RPV outer wall 14, the cam 29 rotates downward around the roller pin 28, rotates below the rails 5 and 6, and the upper portion of the cam 29 contacts the RPV outer wall 14. The shield base 1 is fixed.
【0026】こうして、遮蔽体架台1の位置が定まった
後、それぞれ伸縮装置4および突っ張り装置11のため
に用意した遠隔操作用ハンドル19、25を操作して遮
蔽体架台1をBSW内面に固定する。すなわち、伸縮装
置4のハンドル19を案内部材38を通して第1かさ歯
車17に真直ぐに差し込み、回転させると、第1かさ歯
車17とかみ合う第2かさ歯車18と一体のねじ20が
回転し、ねじ20と組む支柱16が前進し、BSW面に
密着してそこに固定される。After the position of the shield base 1 is thus determined, the shield base 1 is fixed to the inner surface of the BSW by operating the remote control handles 19 and 25 prepared for the telescopic device 4 and the tensioning device 11, respectively. . That is, when the handle 19 of the telescopic device 4 is inserted straight into the first bevel gear 17 through the guide member 38 and rotated, the screw 20 integral with the second bevel gear 18 meshing with the first bevel gear 17 rotates, and the screw 20 is rotated. The support 16 moves forward and is fixed to the BSW surface in close contact therewith.
【0027】また、突っ張り装置11のハンドル25を
案内部材38を通して第1かさ歯車23に真直ぐに差し
込み、回転させると、第1かさ歯車23とかみ合う第2
かさ歯車24と一体の突っ張り棒26が前進し、BSW
面に密着してそこに固定される。When the handle 25 of the tensioning device 11 is inserted straight through the guide member 38 into the first bevel gear 23 and rotated, the second bevel gear 23 meshes with the first bevel gear 23.
The strut 26 integral with the bevel gear 24 advances, and the BSW
It adheres to the surface and is fixed there.
【0028】BSW面への固定が完了した後、車輪付き
成型遮蔽体12をレール5、6上に載せ、さらに成型鉛
13を車輪付き成型遮蔽体12に装着する。この後、車
輪付き成型遮蔽体12をレール5、6の上に載った車輪
35によりRPV外壁14の近くに運び、ロック装置3
1を操作して車輪付き遮蔽体12をそこに固定する。す
なわち、車輪35が通過するとき、ジャッキ32に搭載
されたストッパ34の下でばね33が縮み、このときス
トッパ34は下に降り、車輪35が通り過ぎると、ばね
33が伸びてストッパ34は上に飛び出し、このとき車
輪付き遮蔽体12がそこに固定される。After the fixing to the BSW surface is completed, the molded shield 12 with wheels is mounted on the rails 5 and 6, and the molded lead 13 is mounted on the molded shield 12 with wheels. Thereafter, the molded shield 12 with wheels is carried near the RPV outer wall 14 by the wheels 35 mounted on the rails 5 and 6, and the locking device 3 is used.
1 is operated to fix the wheeled shield 12 there. That is, when the wheel 35 passes, the spring 33 contracts under the stopper 34 mounted on the jack 32. At this time, the stopper 34 descends. When the wheel 35 passes, the spring 33 extends and the stopper 34 moves upward. At this time, the wheeled shield 12 is fixed there.
【0029】ロック装置31による固定後に車輪付き遮
蔽体12を動かすときは、ジャッキ32を操作してスト
ッパ34自身を下に降ろし、車輪35の拘束を解除した
後に車輪付き遮蔽体12を手前に引き出す。When the wheeled shield 12 is to be moved after being fixed by the lock device 31, the jack 32 is operated to lower the stopper 34 itself, and the restraint of the wheel 35 is released, and then the wheeled shield 12 is pulled out. .
【0030】ここで使用される車輪付き成型遮蔽体12
はノズルないし配管の口径寸法と同じかそれよりも大き
い幅のものを使用して放射線に対する防護を適切に維持
するようにしなければならない。Molded shield 12 with wheels used here
Must have a width equal to or larger than the diameter of the nozzle or tubing to maintain adequate protection against radiation.
【0031】このような仮設遮蔽装置においてはビーム
7、8の長さを変えてノズルないし配管の口径に合わせ
ることができ、レール幅に見合う幅の車輪付き成型遮蔽
体12を搭載して線源との間に釣り合いを保つことによ
り、不足のない遮蔽効果を得ることが可能になる。さら
に、車輪付き成型遮蔽体12はレール5、6上を転がる
車輪35により作業者がこれを移動するときもそれ程大
きな力は不要で、過大な負担をかけない。In such a temporary shielding device, the length of the beams 7 and 8 can be changed to match the diameter of the nozzle or pipe, and a molded shield 12 with wheels having a width corresponding to the rail width is mounted. By maintaining a balance between the two, it is possible to obtain a sufficient shielding effect. In addition, the molded shield 12 with wheels does not require a large force when the operator moves the wheels 35 rolling on the rails 5 and 6, and does not impose an excessive burden.
【0032】また、高線量当量率のBSWプラグ内に立
入ることなく、車輪付き成型遮蔽体12をレール5、6
に沿って移動してRPV外壁14近くに置くことで、炉
心部からの放射線により作業員が被爆するのを効果的に
防ぐことができ、RPVノズルまわりの作業での放射線
の影響を確実に免れることが可能になる。Further, the wheeled molded shield 12 is connected to the rails 5 and 6 without entering the high dose equivalent rate BSW plug.
Moving along the RPV outer wall 14, it is possible to effectively prevent workers from being exposed to radiation from the core, and to reliably avoid the effects of radiation during work around the RPV nozzle. It becomes possible.
【0033】さらに、遮蔽体架台1の底部がBSWプラ
グに向かって伸びる伸縮装置4で、また左右両側面の上
下2箇所および上部がBSWプラグに向かって伸びる突
っ張り装置11でそれぞれBSWプラグの内面に突っ張
って固定されるので、遮蔽体架台1を極めて強固に、か
つ安定にBSWプラグ内に固定することができる。Further, the bottom of the shield base 1 is extended and contracted by a telescoping device 4 extending toward the BSW plug, and the upper and lower two sides of the left and right sides and a tensioning device 11 which is extended toward the BSW plug are respectively formed on the inner surface of the BSW plug. Since the shield base 1 is stretched and fixed, the shield base 1 can be extremely firmly and stably fixed in the BSW plug.
【0034】また、伸縮装置4および突っ張り装置11
は高線量当量率のBSWプラグ内にあるが、遠隔操作用
ハンドル19、25を用いて線量当量率の低い場所から
操作するので、作業員が直接放射線を浴びることはな
い。The extension device 4 and the tension device 11
Is in a BSW plug with a high dose equivalent rate, but is operated from a place with a low dose equivalent rate using the remote control handles 19 and 25, so that the worker is not directly exposed to radiation.
【0035】一方、本実施の形態においてはレール5、
6の先端で常にRPV外壁14と接するカム29の働き
によって車輪付き成型遮蔽体12自身の荷重によりレー
ル5、6をRPV外壁14に固定することができる。On the other hand, in the present embodiment, the rail 5,
The rails 5 and 6 can be fixed to the RPV outer wall 14 by the load of the molded shield 12 with wheels by the action of the cam 29 which always contacts the RPV outer wall 14 at the tip of the 6.
【0036】さらに、車輪付き成型遮蔽体12をロック
装置31によってRPV外壁14近くの所定の場所に固
定することができ、移動形成型遮蔽体が不測の事故によ
って動き、遮蔽効果が損なわれるのを防ぐことが可能で
ある。このジャッキ32のハンドルは高線量当量率のB
SWプラグ内にあるが、線量当量率の低い場所から操作
するので、作業員が直接放射線を浴びることはない。Furthermore, the molded shield 12 with wheels can be fixed to a predetermined place near the RPV outer wall 14 by the lock device 31, so that the movable formation type shield moves due to an unexpected accident and the shielding effect is impaired. It is possible to prevent. The handle of this jack 32 has a high dose equivalent rate B
Although it is located inside the SW plug, it is operated from a place where the dose equivalent rate is low, so that the worker is not directly exposed to radiation.
【0037】また、本発明の他の実施の形態を説明す
る。図7において、本実施の形態においては上記実施の
形態のレール5、6に代えてローラ付きレールが使用さ
れる。すなわち、成型遮蔽体39が搭載されるレール4
0、41には多数の回転ローラ92が装着されている。
この回転ローラ42はレール40、41内で自在に回転
することができ、成型遮蔽体39が回転するローラ42
上を滑りつつ、RPV外壁14にかけて移動するように
なっている。この成型遮蔽体39は図5に示したロック
装置34によりRPV外壁14寄りに固定される。Next, another embodiment of the present invention will be described. In FIG. 7, in this embodiment, rails with rollers are used instead of the rails 5 and 6 of the above embodiment. That is, the rail 4 on which the molded shield 39 is mounted
A number of rotating rollers 92 are mounted on 0 and 41.
The rotating roller 42 can freely rotate within the rails 40 and 41, and the roller 42 on which the molded shield 39 rotates.
It moves over the RPV outer wall 14 while sliding on the top. The molded shield 39 is fixed to the RPV outer wall 14 by the lock device 34 shown in FIG.
【0038】本実施の形態によれば、成型遮蔽体39が
回転するローラ42上を滑りつつ、移動するので、成型
遮蔽体39の移動時の摩擦抵抗を減少させることが可能
になり、上記した車輪付き成型遮蔽体12と比べて成型
遮蔽体39の移動のために作業者にかかる負担をさらに
小さくすることができる。According to the present embodiment, since the molded shield 39 moves while sliding on the rotating roller 42, the frictional resistance during the movement of the molded shield 39 can be reduced. The burden on the worker due to the movement of the molded shield 39 can be further reduced as compared with the molded shield 12 with wheels.
【0039】[0039]
【発明の効果】以上説明したように本発明は遮蔽体架台
に支持される2本のレール上に成型遮蔽体を移動可能に
設けているので、BSWプラグ内に立入ることなく成型
遮蔽体をレールに沿って移動してRPV外壁近くに置く
ことで、炉心部からの放射線により作業員が被爆するの
を効果的に防ぐことが可能で、RPVノズルまわりの作
業での放射線の影響を確実に免れることができる。As described above, according to the present invention, since the molded shield is movably provided on the two rails supported by the shield base, the molded shield can be mounted without entering the BSW plug. By moving along the rail and placing it near the RPV outer wall, it is possible to effectively prevent workers from being exposed to radiation from the core, and to ensure that the radiation around the RPV nozzle is not affected by radiation. Can be spared.
【図1】本発明による仮設遮蔽装置の実施の形態を示す
斜視図。FIG. 1 is a perspective view showing an embodiment of a temporary shielding device according to the present invention.
【図2】本発明に係る伸縮装置を示す断面図。FIG. 2 is a sectional view showing a telescopic device according to the present invention.
【図3】本発明に係る突っ張り装置を示す断面図。FIG. 3 is a cross-sectional view showing a tensioning device according to the present invention.
【図4】本発明に係るカム装置を示す構成図。FIG. 4 is a configuration diagram showing a cam device according to the present invention.
【図5】本発明に係るロック装置を示す構成図。FIG. 5 is a configuration diagram showing a lock device according to the present invention.
【図6】本発明に係る遠隔操作用ハンドルを示す構成
図。FIG. 6 is a configuration diagram showing a remote control handle according to the present invention.
【図7】本発明の他の実施の形態を示す斜視図。FIG. 7 is a perspective view showing another embodiment of the present invention.
1 遮蔽体架台 4 伸縮装置 5、6 レール 11 突っ張り装置 12 車輪付き成型遮蔽体 15 カム装置 26 突っ張り棒 29 カム 31 ロック装置 39 成型遮蔽体 DESCRIPTION OF SYMBOLS 1 Shield base 4 Telescopic device 5, 6 rail 11 Stretch device 12 Molded shield with wheels 15 Cam device 26 Strut rod 29 Cam 31 Lock device 39 Molded shield
Claims (6)
当接して固定される遮蔽体架台と、この遮蔽体架台に一
端を支持されると共に、他端を圧力容器外壁まで達する
ように横方向に延長して形成される2本のレールと、こ
の2本のレール上に移動可能に設けられた成型遮蔽体と
を備えてなる仮設遮蔽装置。1. A shield base fixed at a bottom, both sides and an upper part in contact with a biological shield wall, one end of which is supported by the shield base and the other end is extended so as to reach an outer wall of the pressure vessel. A temporary shielding device comprising: two rails formed to extend in the direction; and a molded shielding body movably provided on the two rails.
台の底部に伸縮装置、両側面および上部に突っ張り装置
をそれぞれ設けたことを特徴とする請求項1記載の仮設
遮蔽装置。2. The temporary shielding device according to claim 1, wherein a telescopic device is provided on a bottom portion of the shield base abutting on the living body shielding wall, and a stretching device is provided on both side surfaces and an upper portion.
部にカム装置を設けたことを特徴とする請求項1記載の
仮設遮蔽装置。3. The temporary shielding device according to claim 1, wherein a cam device is provided at an end of the rail that contacts the outer wall of the pressure vessel.
成型遮蔽体を前記圧力容器外壁寄りに近づけて固定する
ロック装置を設けたことを特徴とする請求項1記載の仮
設遮蔽装置。4. The temporary shielding device according to claim 1, wherein a lock device is provided on the rail near the outer wall of the pressure vessel to fix the molded shield closer to the outer wall of the pressure vessel.
車輪付き成型遮蔽体からなり、前記成型遮蔽体を該レー
ル上を転がる前記車輪により移動させるようにしたこと
を特徴とする請求項1記載の仮設遮蔽装置。5. The molded shield comprises a wheeled molded shield having a plurality of wheels, and the molded shield is moved by the wheels rolling on the rail. 2. The temporary shielding device according to 1.
ローラ付きレールからなり、前記成型遮蔽体を前記回転
ローラ上を滑らせて移動させるようにしたことを特徴と
する請求項1記載の仮設遮蔽装置。6. The temporary installation according to claim 1, wherein the rail comprises a roller-equipped rail having a plurality of rotating rollers, and the molded shield is slid on the rotating rollers to be moved. Shielding device.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23051297A JPH1164582A (en) | 1997-08-13 | 1997-08-13 | Temporary shield device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23051297A JPH1164582A (en) | 1997-08-13 | 1997-08-13 | Temporary shield device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH1164582A true JPH1164582A (en) | 1999-03-05 |
Family
ID=16908922
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP23051297A Pending JPH1164582A (en) | 1997-08-13 | 1997-08-13 | Temporary shield device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH1164582A (en) |
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KR101492562B1 (en) * | 2014-06-12 | 2015-02-12 | 나우 주식회사 | Radiation shielding devices for pipe inspection |
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KR101674669B1 (en) * | 2016-09-02 | 2016-11-09 | 주식회사 지스콥 | Apparatus for restricting radiation exposure from radioisotope during nondestructive inspection provided with esay mobility structure |
KR101674667B1 (en) * | 2016-09-02 | 2016-11-09 | 주식회사 지스콥 | Apparatus for restricting radiation exposure from radioisotope during nondestructive inspection provided with esay mobility structure |
KR101674665B1 (en) * | 2016-09-02 | 2016-11-09 | 주식회사 지스콥 | Apparatus for restricting radiation exposure from radioisotope during nondestructive inspection provided with esay mobility structure |
JP7081037B1 (en) * | 2021-11-04 | 2022-06-06 | 株式会社ノリタケカンパニーリミテド | Continuous heating furnace |
-
1997
- 1997-08-13 JP JP23051297A patent/JPH1164582A/en active Pending
Cited By (9)
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KR101492562B1 (en) * | 2014-06-12 | 2015-02-12 | 나우 주식회사 | Radiation shielding devices for pipe inspection |
KR101658190B1 (en) * | 2016-04-27 | 2016-09-22 | 주식회사 지스콥 | Apparatus for restricting radiation exposure from radioisotope during nondestructive inspection provided with esay mobility structure |
KR101674668B1 (en) * | 2016-09-02 | 2016-11-09 | 주식회사 지스콥 | Apparatus for restricting radiation exposure from radioisotope during nondestructive inspection provided with esay mobility structure |
KR101674666B1 (en) * | 2016-09-02 | 2016-11-09 | 주식회사 지스콥 | Apparatus for restricting radiation exposure from radioisotope during nondestructive inspection provided with esay mobility structure |
KR101674664B1 (en) * | 2016-09-02 | 2016-11-09 | 주식회사 지스콥 | Apparatus for restricting radiation exposure from radioisotope during nondestructive inspection provided with esay mobility structure |
KR101674669B1 (en) * | 2016-09-02 | 2016-11-09 | 주식회사 지스콥 | Apparatus for restricting radiation exposure from radioisotope during nondestructive inspection provided with esay mobility structure |
KR101674667B1 (en) * | 2016-09-02 | 2016-11-09 | 주식회사 지스콥 | Apparatus for restricting radiation exposure from radioisotope during nondestructive inspection provided with esay mobility structure |
KR101674665B1 (en) * | 2016-09-02 | 2016-11-09 | 주식회사 지스콥 | Apparatus for restricting radiation exposure from radioisotope during nondestructive inspection provided with esay mobility structure |
JP7081037B1 (en) * | 2021-11-04 | 2022-06-06 | 株式会社ノリタケカンパニーリミテド | Continuous heating furnace |
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