JPH01250800A - Radiation shielding device - Google Patents
Radiation shielding deviceInfo
- Publication number
- JPH01250800A JPH01250800A JP7601988A JP7601988A JPH01250800A JP H01250800 A JPH01250800 A JP H01250800A JP 7601988 A JP7601988 A JP 7601988A JP 7601988 A JP7601988 A JP 7601988A JP H01250800 A JPH01250800 A JP H01250800A
- Authority
- JP
- Japan
- Prior art keywords
- hatch
- cover
- hatch cover
- shielding wall
- area
- 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
- 230000005855 radiation Effects 0.000 title claims description 22
- 238000012423 maintenance Methods 0.000 claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 5
- 239000010959 steel Substances 0.000 claims abstract description 5
- 238000007689 inspection Methods 0.000 claims description 2
- 238000004062 sedimentation Methods 0.000 abstract description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 238000000354 decomposition reaction Methods 0.000 abstract description 2
- 230000005251 gamma ray Effects 0.000 abstract description 2
- 229910052742 iron Inorganic materials 0.000 abstract description 2
- 238000000638 solvent extraction Methods 0.000 abstract 1
- 238000000926 separation method Methods 0.000 description 6
- 239000011347 resin Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 238000003756 stirring Methods 0.000 description 5
- 239000002699 waste material Substances 0.000 description 4
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002901 radioactive waste Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Closures For Containers (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の目的〕
（産業上の利用分野）
本発明は原子力発電所等の放射線取扱い施設における高
線量区域と低線量区域との境界に設けられる放射線遮蔽
装置に係り、特に高線量区域と低線量区域に形成された
ハツチを開閉自在に覆うハツチカバー構造の改良に関す
る。[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a radiation shielding device provided at the boundary between a high-dose area and a low-dose area in a radiation handling facility such as a nuclear power plant. In particular, the present invention relates to improvements in hatch cover structures that open and close hatches formed in high-dose areas and low-dose areas.
（従来の技術）
原子力発電所や放射線取扱い施設では、施設内で作業に
従事する作業員の安全性を考慮して種々の放射線遮蔽装
置が設けられている。その一つとして、構造的に放射線
の遮蔽壁である天井スラブに出入用ハツチを形成し、こ
のハツチを遮蔽ハツチカバーで覆ったものがある。例え
ば、ライナー槽となっている廃棄物処理系の沈降分離槽
や、機器自体が大きなものである大容量のポンプ・機器
室としての各種施設にあっては、いずれも天井スラブの
一部にハツチを設け、遮蔽壁と同じ厚さのコンクリート
製遮蔽ハツチカバーで覆った構造となっている。(Prior Art) In nuclear power plants and radiation handling facilities, various radiation shielding devices are installed in consideration of the safety of workers engaged in work within the facilities. One such method is to form an access hatch in the ceiling slab, which is a structural radiation shielding wall, and cover this hatch with a shielding hatch cover. For example, in various facilities such as sedimentation separation tanks in waste treatment systems that are liner tanks, and large-capacity pump/equipment rooms where the equipment itself is large, they are all built into part of the ceiling slab. The structure is such that it is covered with a concrete shielding hatch cover of the same thickness as the shielding wall.
すなわち、放射線遮蔽装置として、第４図および第５図
に示された放射線取扱い施設の高線量区域である沈降分
離Ｍｌを例にして説明する。この沈降分に槽１自体は、
原子力発電所内の各種ろ過器や脱塩装置の放射性廃棄樹
脂を？９積し、放射線を減衰させるために使用されるも
ので、廃棄樹脂は減衰された後に１次の固化処理設備へ
移送されここで固化処理され、ドラム缶に詰められる。That is, the radiation shielding device will be explained by taking as an example the sedimentation separation M1 which is a high dose area of a radiation handling facility shown in FIGS. 4 and 5. In this sedimentation, tank 1 itself is
Radioactive waste resin from various filters and desalination equipment in nuclear power plants? 9 stacks are used to attenuate radiation, and after the waste resin is attenuated, it is transferred to the primary solidification treatment facility, where it is solidified and packed into drums.
沈降分離槽１は、各廃棄樹脂の種類によって複数にして
設置されている。また、廃棄樹脂を固化処理設備に移送
する際１円滑に移送するため、補給水を注入し、撹拌ポ
ンプで沈降分は槽１内の樹脂を撹拌する必要がある。こ
れがため、沈降分離槽１の遮蔽壁２となっている上部ス
ラブには、その−部にハツチ３を設け、このハツチ３は
コンクリート製ハツチカバー４にて開閉できるようにし
てあり、このハツチ３を介して撹拌ポンプが出し入れさ
れる。また、ハツチカバー４を設けたエリアはバルブ室
やメンテナンスエリアとなっているためハツチカバ−４
自体の厚さは遮蔽壁２と同じ厚さで、ハツチ３の形成し
た係合段部５に嵌合されることで、位置決め、良好な密
閉状態が得られるようにしである。A plurality of settling tanks 1 are installed depending on the type of waste resin. In addition, in order to smoothly transfer the waste resin to the solidification treatment facility, it is necessary to inject make-up water and stir the resin in the tank 1 to remove sedimentation using a stirring pump. For this reason, the upper slab serving as the shielding wall 2 of the sedimentation separation tank 1 is provided with a hatch 3 at its negative part, and this hatch 3 can be opened and closed with a concrete hatch cover 4. The stirring pump is inserted and removed through the pump. In addition, since the area where the hatch cover 4 is installed is a valve room and maintenance area, the hatch cover 4
Its thickness is the same as that of the shielding wall 2, and by fitting into the engagement step 5 formed by the hatch 3, positioning and good sealing can be achieved.
（発明が解決しようとする課題）
通常、このハツチカバー４は沈降分離槽１内の放射線を
遮蔽するために、一般に８０〜１００ａｎの厚さを有し
、ハツチ３の大きさによって異なるも２ないし３分割の
構造となっていて、その１分割当りの重量は約３〜５ト
ンとなっている。このようなハツチカバー４の開放作業
は、前述の撹拌ポンプを挿入するためのクレーンを利用
することで行なわれているが、ハツチカバ−４自体が相
当の重量を有するがために多くの作業時間を費やすこと
になるばかりでなく、安全性も考慮しなければならない
ものである。一般に、コンクリート製のハツチカバー４
は、撹拌ポンプの重量（約３トン）より重く、このため
、クレーンの能力はハツチカバー４の重量によって決定
され、必要以上に大型のクレーンを使用せざるを得ない
ものであった。(Problem to be Solved by the Invention) Normally, this hatch cover 4 generally has a thickness of 80 to 100 an in order to shield radiation in the sedimentation separation tank 1, and the thickness varies depending on the size of the hatch 3. It has a divided structure, and each division weighs approximately 3 to 5 tons. This kind of opening work of the hatch cover 4 is carried out by using a crane for inserting the above-mentioned stirring pump, but since the hatch cover 4 itself has a considerable weight, it takes a lot of time to open the hatch cover 4. Not only this, but also safety must be considered. Generally, the hatch cover 4 is made of concrete.
is heavier than the stirring pump (approximately 3 tons), and for this reason, the capacity of the crane is determined by the weight of the hatch cover 4, which necessitates the use of a crane that is larger than necessary.
本発明は、上述した事情を考慮してなされたもので、沈
降分離槽の如き放射線取扱い施設において、ハツチの開
閉作業を容易にし、安全性を向上させるとともに、大型
のクレーンの使用を不要にしてコスト低減を図ることが
可能な放射線遮蔽装置を提供することにある。The present invention has been made in consideration of the above-mentioned circumstances, and makes it easier to open and close hatches in radiation handling facilities such as sedimentation separation tanks, improves safety, and eliminates the need for large cranes. An object of the present invention is to provide a radiation shielding device that can reduce costs.
（課題を解決するための手段）
上記目的を達成するため、本発明では放射線取扱い施設
の高線量区域と低線量区域とを区画する遮蔽壁に設けら
れたハツチにおいてハツチカバーを鋼製とし下部にレー
ルを設は遮蔽壁内に収納しろる構造で移動自在に構成さ
れたことを特徴とするものである。(Means for Solving the Problems) In order to achieve the above object, in the present invention, the hatch cover is made of steel in the hatch provided on the shielding wall that separates the high-dose area and the low-dose area of a radiation handling facility, and the rail is installed at the bottom. The device is characterized by being constructed so that it can be housed within a shielding wall and is movable.
（作用）
このように構成された放射線遮蔽装置はハツチの開閉作
業を容易にし作業の安全性を向上させ、ハツチ室の空間
を有効に利用できる。(Function) The radiation shielding device configured as described above facilitates the operation of opening and closing the hatch, improves the safety of the operation, and makes it possible to effectively utilize the space in the hatch chamber.
（実施例）
以下、本発明の一実施例を第１図から第３図を参照して
説明する。(Example) An example of the present invention will be described below with reference to FIGS. 1 to 3.
第１図は放射線取扱い施設１例えば沈降分離槽であり、
上部メンテナンスエリアは低線量区域となっており、ハ
ツチ３をハツチカバー６で遮蔽をした状態を示し、ハツ
チカバー６は遮蔽Ｊ！！２内に収納することができる。Figure 1 shows a radiation handling facility 1, such as a sedimentation separation tank.
The upper maintenance area is a low-dose area, and the hatch 3 is shown shielded by a hatch cover 6, and the hatch cover 6 is shielded by J! ! It can be stored in 2.
第２図は第１図の断面を、第３図は遮蔽壁に収納された
ハツチカバー６の部分詳細図を示している。ハツチカバ
ー収納部には開放用のレール８が設置され、ハツチカバ
−６下部の車軸９により移動自在となっている。ハツチ
開放時には収納場所７に移すことができる。ハツチカバ
ー６は２分割されて分割部から放射線が漏洩しない様に
相互に当接する部分はオフセット構造の段部１０が形成
されている。ハツチカバー６はコンクリート製に比較し
てガンマ線遮蔽効果が大きい鉄を用いることになり、コ
ンクリート製の従来のものに比し、尋の厚さは約１７３
のとすることができかっ、遮蔽壁２内に収納するため開
放時においてもメンテナンスエリアを有効に活用できる
。FIG. 2 shows a cross section of FIG. 1, and FIG. 3 shows a partially detailed view of the hatch cover 6 housed in the shielding wall. A rail 8 for opening is installed in the hatch cover housing section, and the hatch cover 6 is movable by an axle 9 at the bottom. When the hatch is opened, it can be moved to the storage location 7. The hatch cover 6 is divided into two parts, and a step part 10 of an offset structure is formed at the part where the two parts come into contact with each other so that radiation does not leak from the divided parts. The hatch cover 6 uses iron, which has a greater gamma ray shielding effect than concrete, and is approximately 173 fathoms thicker than the conventional concrete cover.
Since it is stored inside the shielding wall 2, the maintenance area can be effectively utilized even when it is opened.
また前述のようにハツチカバー６はレール８上を自在に
移動するためクレーンを用いなくとも開放可能となる。Further, as described above, the hatch cover 6 can be freely moved on the rails 8, so that it can be opened without using a crane.
以上に述べたように１本発明に係る放ｒＡ１ａ遮蔽装置
においては、ハツチカバーを複数に分割可能に形成し水
平方向に移動自在に構成したことにょリ、開閉作業をク
レーンを使用せずに安全かつ迅速に行うことができる。As described above, in the release rA1a shielding device according to the present invention, the hatch cover is formed so that it can be divided into a plurality of parts and is configured to be movable in the horizontal direction, so that opening and closing operations can be performed safely and without using a crane. It can be done quickly.
従来のコンクリート製ハツチカバーは開放後にメンテナ
ンスエリアに収納しているが、その容積はかなり大きな
ものであり。Conventional concrete hatch covers are stored in the maintenance area after being opened, but their volume is quite large.
安全上からも問題があったが、ｉｌ製として遮蔽壁内収
納するためメンテナンス時においてもメンテナンスエリ
アを有効に利用できる効果がある。また、ハツチの開閉
作業を容易にし、保守・点検作業の安全性を向上させる
ことができる。Although there was a safety issue, since it is made of IL and is housed within a shielding wall, the maintenance area can be used effectively during maintenance. In addition, the hatch can be opened and closed easily, and the safety of maintenance and inspection work can be improved.
第１図は本発明に係る放射線遮蔽装置一実施例を示す縦
断面図、第２図は本発明の第１図のＡ−Ａに沿う平面図
、第３図は本発明の第１図に示された天井スラブのハツ
チ部の拡大図、第４図は従来の放射線遮蔽装置を示す平
面図、第５図は従来の第４図のＢ−Ｈに沿う断面図であ
る。
１・・・沈降分解槽
２・・・遮蔽壁
３・・・ハツチ
４・・・ハツチカバー（コンクリート製）５・・・係合
段部
６・・・鋼製ハツチカバー
７・・・収納場所
８・・・レール
９・・・車軸
ｌＯ・・・段部
代理人 弁理士 則 近 憲 佑
同 第子丸 健
第１図
第２図
第３図FIG. 1 is a longitudinal sectional view showing an embodiment of the radiation shielding device according to the present invention, FIG. 2 is a plan view taken along the line A-A of FIG. 1 of the present invention, and FIG. FIG. 4 is a plan view showing a conventional radiation shielding device, and FIG. 5 is a sectional view taken along line B-H in FIG. 4 of the conventional radiation shielding device. 1... Sedimentation and decomposition tank 2... Shielding wall 3... Hatch 4... Hatch cover (made of concrete) 5... Engagement step 6... Steel hatch cover 7... Storage space 8. ...Rail 9...Axle lO...Danbe's agent Patent attorney Nori Chika Ken Yudo Daishimaru Ken Figure 1 Figure 2 Figure 3
Claims (1)
る水平の遮蔽壁に設けられた保守・点検時の開放用ハッ
チを具備してなる放射線遮蔽装置において、複数のレー
ルと、このレール上を移動可能に設けられた鋼製のハッ
チと、このハッチの収納場所を有し上記レールを有する
遮蔽壁とを具備してなり、ハッチを閉じた場合及びハッ
チを開いた場合にハッチの上面高さと遮蔽壁の上面高さ
が面一に形成されてなることを特徴とする放射線遮蔽装
置。In a radiation shielding device equipped with a hatch for opening during maintenance and inspection provided in a horizontal shielding wall that separates a high-dose area and a low-dose area of a radiation handling facility, a plurality of rails and a It is equipped with a movable steel hatch and a shielding wall that has a storage space for the hatch and has the rail, and when the hatch is closed and opened, the height of the top surface of the hatch is the same as the height of the hatch. A radiation shielding device characterized in that the upper surface height of the shielding wall is formed to be flush with each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7601988A JPH01250800A (en) | 1988-03-31 | 1988-03-31 | Radiation shielding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7601988A JPH01250800A (en) | 1988-03-31 | 1988-03-31 | Radiation shielding device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01250800A true JPH01250800A (en) | 1989-10-05 |
Family
ID=13593118
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7601988A Pending JPH01250800A (en) | 1988-03-31 | 1988-03-31 | Radiation shielding device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01250800A (en) |
-
1988
- 1988-03-31 JP JP7601988A patent/JPH01250800A/en active Pending
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