JP2002040191A - Radiation shield structure for duct - Google Patents
Radiation shield structure for ductInfo
- Publication number
- JP2002040191A JP2002040191A JP2000227422A JP2000227422A JP2002040191A JP 2002040191 A JP2002040191 A JP 2002040191A JP 2000227422 A JP2000227422 A JP 2000227422A JP 2000227422 A JP2000227422 A JP 2000227422A JP 2002040191 A JP2002040191 A JP 2002040191A
- Authority
- JP
- Japan
- Prior art keywords
- duct
- blade
- wing plate
- radiation shielding
- shielding structure
- 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
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
- Duct Arrangements (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】放射性物質貯蔵施設の排気ダ
クト流路構造に関し、貯蔵施設の空気の自然循環による
冷却をするに当り、圧損を抑制することにより、冷却効
果を高め、更に放射線の排気ダクトからの外部への流出
を防止する構造としたものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust duct flow path structure of a radioactive material storage facility, and more particularly, to cooling the storage facility by natural circulation of air, thereby suppressing a pressure loss to enhance a cooling effect, and furthermore, a radiation exhaust duct. The structure prevents leakage from the outside.
【０００２】[0002]
【従来の技術】図１０は放射性物質の貯蔵施設の内部構
造を示す図であり、現在、本出願人により開発が進めら
れている構造の一例である。図において、放射性物質１
００を収納する建屋は外周囲を完全に密閉した構造であ
り、建屋内には基礎面１０１より下方に容器９１が設け
られ、容器９１内には上下に支持架橋９２，９３が水平
に配置して取付けられ、多数の放射性物質１００が垂直
に支持されている。放射性物質１００は長尺形状のガラ
ス構造として固化されており、その寸法は、例えば直径
が４００〜５００mm、長さが１３００mm程度の大きさで
あり、安全性の面より完全に固定して配置する必要があ
る。2. Description of the Related Art FIG. 10 is a view showing the internal structure of a radioactive material storage facility, and is an example of a structure currently being developed by the present applicant. In the figure, radioactive substance 1
The building for storing 00 has a structure in which the outer periphery is completely sealed. A container 91 is provided below the base surface 101 in the building, and support bridges 92 and 93 are horizontally arranged above and below the container 91. And a large number of radioactive materials 100 are supported vertically. The radioactive substance 100 is solidified as a long glass structure, and its size is, for example, about 400 to 500 mm in diameter and about 1300 mm in length, and is completely fixed and disposed from the viewpoint of safety. There is a need.
【０００３】建屋内の放射性物質１００の上方へは、貯
蔵時のアクセスを行うクレーン用走行ビーム９５が配置
され、走行クレーン９４が走行する構成である。又、建
屋の一方の側には空気流入通路９６が設けられ、空気取
入口９８から流入する空気をスクリーン９７を通して取
り入れ、翼板ユニット８５により内部との放射能の遮蔽
を行い空気流入口９９より容器９１内へ冷却用の空気と
して流入させる。[0003] Above the radioactive material 100 in the building, a traveling beam 95 for a crane for accessing during storage is arranged, and a traveling crane 94 travels. Further, an air inflow passage 96 is provided on one side of the building, and air that flows in from an air intake 98 is taken in through a screen 97, and the radiation is shielded from the inside by a wing plate unit 85. The air is allowed to flow into the container 91 as cooling air.
【０００４】他方の側には冷却空気出口ダクト９０が設
けられており、出口ダクト９０は容器９１とは空気流出
口８１と連通し、出口ダクト９０の四側面の壁８０には
放射線の外部への流出を防止するための翼板ユニット８
６が多層に所定の間隙を保って配置されている。冷却空
気出口ダクト９０の先端部には出口筒８３が設けられ、
空気がスクリーン８２を通って出口筒に流れ外部へ放出
される。A cooling air outlet duct 90 is provided on the other side. The outlet duct 90 communicates with an air outlet 81 with a container 91, and a wall 80 on the four side surfaces of the outlet duct 90 is provided to the outside of radiation. Plate unit 8 for preventing outflow of air
6 are arranged in a multilayer with a predetermined gap. An outlet tube 83 is provided at the tip of the cooling air outlet duct 90,
Air flows through the screen 82 to the outlet tube and is discharged to the outside.
【０００５】上記構成の貯蔵施設において、放射性物質
１００は自然発熱作用により温度が上昇し、その温度が
５００℃以上となるとガラス固化体が溶けて放射能閉じ
こめ性能が低下するため、その温度が常時５００℃以下
に抑える必要がある。そのために、空気取入口９８から
空気を取り入れて自然対流により容器９１内部に流通さ
せ、放射性物質１００を冷却し、昇温した空気は冷却空
気出口ダクト９０より外部へ放出する構造となってい
る。In the storage facility having the above-mentioned structure, the temperature of the radioactive substance 100 rises due to a natural heat generation effect. When the temperature exceeds 500 ° C., the vitrified material is melted and the performance of confining radioactivity is reduced. It is necessary to keep the temperature below 500 ° C. For this purpose, air is taken in from the air inlet 98 and circulated through the container 91 by natural convection to cool the radioactive material 100, and the heated air is discharged from the cooling air outlet duct 90 to the outside.
【０００６】空気は空気取入口９８よりスクリーン９７
を通って建屋内へ流入し、空気流入通路９６から翼板ユ
ニット８５を通過して空気流入口９９から容器９１内へ
入り、放射性物質１００の熱を吸収して昇温し、空気流
出口８１から冷却空気出口ダクト９０に流出する。ダク
ト９０に流出した空気は、翼板ユニット８６を通過して
上昇し、ダクト出口のスクリーン８２を通り、出口筒８
３より外部へ流出する。このように空気の自然対流によ
る換気により放射性物質１００から発生する熱を冷却
し、内部の温度を５００℃以下に抑えている。Air is supplied to a screen 97 from an air inlet 98.
Through the air inlet passage 96, through the vane unit 85, into the container 91 through the air inlet 99, absorb the heat of the radioactive material 100 and raise the temperature, and the air outlet 81 From the cooling air outlet duct 90. The air flowing out into the duct 90 rises through the wing plate unit 86, passes through the screen 82 at the outlet of the duct, and exits through the outlet tube 8.
Outflow from 3 Thus, the heat generated from the radioactive material 100 by the ventilation by the natural convection of the air is cooled, and the internal temperature is suppressed to 500 ° C. or less.
【０００７】図９は上記に説明した放射性物質貯蔵施設
の冷却空気出口ダクト９０に設けられた翼板ユニットの
各種形状を示す断面図である。（ａ）の例では、出口ダ
クト９０の壁８０の対向する面から出口ダクト開口部の
幅よりも短い翼板６０を所定の間隔で交互に垂直方向に
配置した例である。この例においては放射線は図中２点
鎖線で示すように反射しながらその間隔を通り、上下の
翼板６０で多重反射して減衰して反射線の外部への流出
量を許容される基準値以下に抑えることができるが、流
れが大きく蛇行するので圧損が大きくなり、自然換気の
対流が悪くなってしまう。又、翼板６０の枚数が少ない
と放射能の遮蔽性能が低下してしまう。FIG. 9 is a sectional view showing various shapes of the blade unit provided in the cooling air outlet duct 90 of the radioactive material storage facility described above. In the example of (a), the wing plates 60 shorter than the width of the outlet duct opening from the opposite surface of the wall 80 of the outlet duct 90 are alternately arranged at predetermined intervals in the vertical direction. In this example, the radiation is reflected as shown by the two-dot chain line in the figure, passes through the interval, and is multiple-reflected by the upper and lower blades 60 to be attenuated, thereby allowing the amount of reflected light to flow out of the reference value. However, since the flow is large and meandering, the pressure loss increases and the convection of natural ventilation deteriorates. In addition, if the number of blades 60 is small, the shielding performance of radioactivity is reduced.
【０００８】又、（ｂ）の例では、翼板ユニット６１に
上下方向でくの字状の通路６１ａを多数形成した例であ
り、又、（ｃ）の例では、ジグザグ状の通路６２ａを多
数形成した翼板ユニット６２としたものである。これら
の例においては、空気は通路６１ａ、又は６２ａを通過
する際には左右へ急激に流れの方向を変えるので、いず
れも圧損が大きくなってしまい、又、構造的にも大きな
構造体となり、設置面積が大となる。In the example shown in FIG. 2B, a large number of vertical U-shaped passages 61a are formed in the wing plate unit 61. In the example shown in FIG. 1C, the zigzag passages 62a are formed. This is a blade unit 62 formed in a large number. In these examples, when the air passes through the passage 61a or 62a, the direction of the flow suddenly changes to the left and right, so that the pressure loss increases in each case, and the structure becomes a large structural body. The installation area is large.
【０００９】[0009]
【発明が解決しようとする課題】前述のように現在の放
射性物質の貯蔵設備においては、内部の放射性物質が発
生する熱を空気の自然対流による換気で冷却することが
行われており、この場合には空気を排出するダクト、即
ち、図１０の例では冷却空気出口ダクト９０において圧
損抑制と放射線遮蔽の両立が求められる。現状では出口
ダクト９０に図９（ａ）に示すようにじゃま板となる翼
板６０を配置したり、（ｂ），（ｃ）に示すように迷路
方式の構造が採用されている。しかし、いずれの方式も
空気の流れの圧損が大きく、放射能の遮蔽性能も充分で
はない、等の問題があった。As described above, in the current storage facilities for radioactive materials, the heat generated by the radioactive materials inside is cooled by ventilation by natural convection of air. 10, it is required that both the suppression of pressure loss and the shielding of radiation be achieved in a duct for discharging air, that is, in the example of FIG. At present, a blade plate 60 serving as a baffle plate is arranged in the outlet duct 90 as shown in FIG. 9A, or a maze type structure is adopted as shown in FIGS. 9B and 9C. However, all of these methods have problems such as a large pressure loss in the flow of air, and insufficient shielding performance of radioactivity.
【００１０】そこで本発明は、放射性物質の発生する熱
を空気の自然対流により冷却する際に、圧損をできるだ
け小さくすると共に、放射能の遮蔽効果も向上させる構
造のダクト放射線遮蔽構造を提供することを課題として
なされたものである。Accordingly, the present invention provides a duct radiation shielding structure having a structure in which pressure loss is reduced as much as possible and the radiation shielding effect is improved when cooling the heat generated by a radioactive substance by natural convection of air. Was made as an issue.
【００１１】[0011]
【課題を解決するための手段】本発明は前述の課題を解
決するために、次の（１）〜（８）の手段を提供する。The present invention provides the following means (1) to (8) in order to solve the above-mentioned problems.
【００１２】（１）放射性物質を貯蔵する施設に空気入
口ダクトから空気を流入させ同放射性物質を冷却し、冷
却後の空気を空気出口ダクトより流出させるダクト放射
線遮蔽構造であって、前記空気入口及び出口ダクトの途
中上下方向に所定の間隔を保って翼板ユニットを多段に
配置して構成され、同各翼板ユニットは、空気流れ方向
と直交する方向に伸びる翼板を所定のピッチで多数横方
向へ配列すると共に、各翼板はそれぞれ面が平行となる
ように傾斜して配列し、更に上又は下へ隣接する翼板ユ
ニットの翼板は同隣接するユニット同志で互いに逆方向
の傾きであり、かつ横方向の位置が互いにずれて配置さ
れていることを特徴とするダクト放射線遮蔽構造。(1) A duct radiation shielding structure in which air flows into an facility for storing radioactive materials from an air inlet duct to cool the radioactive materials, and allows the cooled air to flow out from the air outlet duct. And a plurality of blade units arranged in multiple stages at predetermined intervals in the vertical direction in the middle of the outlet duct, and each blade unit has a large number of blades extending at a predetermined pitch in a direction perpendicular to the air flow direction. The blades are arranged in the horizontal direction, and the blades are arranged at an angle so that the planes are parallel to each other, and the blades of the blade units adjacent to each other upward or downward are tilted in opposite directions by the adjacent units. And a duct radiation shielding structure wherein the lateral positions are displaced from each other.
【００１３】（２）前記翼板ユニットの上下方向の高
さ、上下の翼板ユニット同志の間隔、及び前記翼板のピ
ッチはそれぞれほぼ等しい寸法であることを特徴とする
（１）記載のダクト放射線遮蔽構造。(2) The duct according to (1), wherein the vertical height of the blade unit, the interval between the upper and lower blade units, and the pitch of the blade are substantially equal. Radiation shielding structure.
【００１４】（３）前記翼板の両縁は滑らかな曲面で形
成されていることを特徴とする（１）記載のダクト放射
線遮蔽構造。(3) The duct radiation shielding structure according to (1), wherein both edges of the wing plate are formed with smooth curved surfaces.
【００１５】（４）前記上下に配置した翼板ユニット
は、一方のユニットの翼板の材料が中性子の吸収率の高
い材料からなり、他方のユニットの翼板の材料がγ線又
はＸ線の吸収率の高い材料からなることを特徴とする
（１）記載のダクト放射線遮蔽構造。[0015] (4) In the wing plate units arranged above and below, the material of the wing plate of one unit is made of a material having a high neutron absorption rate, and the material of the wing plate of the other unit is γ-ray or X-ray. The duct radiation shielding structure according to (1), which is made of a material having a high absorption rate.
【００１６】（５）前記翼板ユニットの翼板は、横方向
に中性子の吸収率の高い材料からなる翼板とγ線又はＸ
線の吸収率の高い材料からなる翼板とを交互に配列して
構成したことを特徴とする（１）記載のダクト放射線遮
蔽構造。(5) The wing plate of the wing plate unit includes a wing plate made of a material having a high neutron absorption rate in the lateral direction and a γ-ray or X-ray.
(1) The duct radiation shielding structure according to (1), wherein the blades made of a material having a high line absorptivity are alternately arranged.
【００１７】（６）前記翼板ユニットの翼板は、一方の
側面を中性子の吸収率の高い材料で形成し、他方の側面
をγ線又はＸ線の吸収率の高い材料で形成する二重構造
で構成されることを特徴とする請求項１記載のダクト放
射線遮蔽構造。(6) The wing plate of the wing plate unit has one side surface formed of a material having a high neutron absorption rate and the other side surface formed of a material having a high γ-ray or X-ray absorption rate. 2. The duct radiation shielding structure according to claim 1, wherein the duct radiation shielding structure is constituted by a structure.
【００１８】（７）前記各翼板ユニットの翼板は横方向
に連結バーで連結されると共に、中心で回転可能に両側
において前記空気出口ダクト両壁面に取付けられ、前記
連結バーを横方向に移動させることにより翼板の傾斜角
度を調整可能とすることを特徴とする（１）記載のダク
ト放射線遮蔽構造。(7) The blades of each of the blade units are connected to each other by a connecting bar in the lateral direction, and are rotatably mounted on both sides of the air outlet duct on both sides so as to be rotatable at the center. The duct radiation shielding structure according to (1), wherein the inclination angle of the blade can be adjusted by moving the blade.
【００１９】（８）前記翼板の傾斜角度は水平面に対し
て４０〜７０度の範囲に設定されていることを特徴とす
る（１）記載のダクト放射線遮蔽構造。(8) The duct radiation shielding structure according to (1), wherein an inclination angle of the blade is set in a range of 40 to 70 degrees with respect to a horizontal plane.
【００２０】本発明の（１）においては、空気入口及び
出口ダクトには多段に翼板ユニットが所定の間隔で配置
されているので、空気入口から多段に設けた翼板ユニッ
トを通過した空気は放射性物質を冷却し、冷却後の空気
は、下段の翼板ユニットの傾斜した翼板間の隙間から順
次上の翼板ユニットの翼板間の隙間へ流れ、滑らかな曲
線でスムーズに上昇し空気出口ダクトの先端から流出す
る。従って従来のように急激な流出方向の変化がなく流
れの圧損を最小限に抑えることができる。又、空気中に
含まれる放射性の粒子は、各段でのユニットの翼板が傾
斜し、更にその傾斜も上下に隣接するユニットにおいて
逆方向に傾斜し、これに加え上下のユニットでは翼板の
位置が横方向でずれて配置されているので、直進して流
入して翼板に衝突して一部が吸収され、残りは上段の翼
板に衝突し、一部が吸収され、順次多重反射して衝突／
吸収を繰り返して流出する。従って空気出口ダクトから
空気が流出する位置では放射能のレベルは基準の制限値
以下となる。In (1) of the present invention, since the blade units are arranged at predetermined intervals in the air inlet and outlet ducts, the air that has passed through the blade units provided in multiple stages from the air inlet is not affected. The radioactive material is cooled, and the cooled air flows from the gap between the inclined blades of the lower blade unit to the gap between the blades of the upper blade unit, and rises smoothly with a smooth curve. It flows out of the end of the outlet duct. Therefore, there is no sudden change in the outflow direction as in the prior art, and the pressure loss of the flow can be minimized. In addition, radioactive particles contained in the air cause the blades of the unit at each stage to tilt, and the tilt also tilts in the opposite direction in vertically adjacent units. Since the position is shifted in the horizontal direction, it goes straight and flows in and collides with the vane plate, and a part is absorbed, and the rest collides with the upper blade, a part is absorbed, and multiple reflection is sequentially performed And collision /
Effluent with repeated absorption. Therefore, at the position where air flows out of the air outlet duct, the level of radioactivity is lower than the reference limit value.
【００２１】本発明の（２）では、翼板ユニットの高
さ、間隔、翼板のピッチがそれぞれほぼ等しい寸法で構
成され、このような構成では圧損の抑制と放射能の遮蔽
効果の両方が満足され、両方の効果が高い構成とするこ
とができる。又、本発明の（３）では翼板の両縁部が滑
らかな曲面で形成されるので、空気の流れ抵抗が小さく
なり、圧損低減の効果が向上する。According to (2) of the present invention, the height, interval, and pitch of the blade plates are substantially equal to each other. In such a configuration, both the suppression of pressure loss and the shielding effect of radioactivity are achieved. Satisfaction is achieved, and a configuration in which both effects are high can be achieved. Further, in (3) of the present invention, since both edges of the blade are formed with a smooth curved surface, the air flow resistance is reduced and the effect of reducing pressure loss is improved.
【００２２】本発明の（４）では上下の翼板ユニットに
おいて、一方のユニットは中性子の吸収率が高い翼板で
あり、他方のユニットの翼板はγ線又はＸ線の吸収率が
高い翼板であるので、中性子やγ線、Ｘ線が混在した放
射線の場合には特に有効となるものである。In (4) of the present invention, in the upper and lower blade units, one of the blade units has a high neutron absorption rate, and the other unit has a high γ-ray or X-ray absorption rate. Since it is a plate, it is particularly effective in the case of radiation containing a mixture of neutrons, γ-rays, and X-rays.
【００２３】本発明の（５）では、翼板ユニットの翼板
は中性子の吸収率が高い翼板とγ線、Ｘ線の吸収率の高
い翼板とが交互に横方向に配列しており、又、本発明の
（６）では、翼板ユニットの翼板は、一方の側面が中性
子の吸収率の高い材料、他方の側面がγ線又はＸ線の吸
収率の高い材料の二重構造であるので、上記（４）の発
明と同様に、中性子、γ線、Ｘ線が混在している場合に
適用すると放射線の吸収効率が高まるものである。According to (5) of the present invention, the blades of the blade unit have a high absorption rate of neutrons and a high absorption rate of γ-rays and X-rays alternately arranged in the lateral direction. Also, in (6) of the present invention, the blade plate of the blade plate unit has a double structure in which one side surface is made of a material having a high neutron absorption rate and the other side face is made of a material having a high γ-ray or X-ray absorption rate. Therefore, similarly to the invention of the above (4), when applied to a case where neutrons, γ-rays, and X-rays are mixed, the radiation absorption efficiency is increased.
【００２４】本発明の（７）では、翼板ユニットの各翼
板は連結バーを横方向に動かすことにより、連動してそ
の傾斜角を変化させることができるので、放射線量、空
気流量が変動した時に対応が可能となる。特に、放射線
の漏れ等の事故時にはダクト流路を全閉にできるので有
効な手段となる。In (7) of the present invention, the inclination angle of each blade of the blade unit can be changed in conjunction with the lateral movement of the connecting bar, so that the radiation dose and air flow rate fluctuate. When it does, correspondence becomes possible. In particular, in the event of an accident such as radiation leakage, the duct flow path can be completely closed, which is an effective means.
【００２５】本発明の（８）では、翼板の傾斜角度を水
平面に対して４０〜７０度に設定するので、この範囲で
は空気の流れが滑らかになり圧損を抑えることができる
と共に、放射能の遮蔽効果が良好となり、両者の効果を
両立させ冷却効果を生かして放射能の漏れを規制値以下
に抑えることができる。In (8) of the present invention, the inclination angle of the blade is set at 40 to 70 degrees with respect to the horizontal plane, so that in this range, the air flow becomes smooth, the pressure loss can be suppressed, and the radioactivity is reduced. The shielding effect of the present invention can be improved, the effects of the two can be reconciled, the cooling effect can be utilized, and the leakage of radioactivity can be suppressed to a regulated value or less.
【００２６】[0026]
【発明の実施の形態】以下、本発明の実施の形態につい
て図面に基づいて具体的に説明する。図１は本発明の実
施の第１形態に係るダクト放射線遮蔽構造を示し、
（ａ）は縦断面図、（ｂ）は（ａ）におけるＡ−Ａ断面
図である。両図において、１，２は翼板ユニットであ
り、ユニット１，２で１組を構成し、本実施の第１形態
ではユニット１，２の組を上下に２つ配置した例であ
る。これら翼板ユニット１，２は図１０に示した従来の
放射性物質貯蔵施設の空気流入通路９６の入口部及び冷
却空気出口ダクト９０の下部入口部に配置され、従来の
翼板ユニット８５及び８６に代わるものであが、以下、
説明の都合上空気出口ダクト９０に適用した例で説明す
る。Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 shows a duct radiation shielding structure according to a first embodiment of the present invention,
(A) is a longitudinal sectional view, (b) is an AA sectional view in (a). In both figures, reference numerals 1 and 2 denote wing plate units, which constitute one set of units 1 and 2, and the first embodiment is an example in which two sets of units 1 and 2 are arranged vertically. These blade units 1 and 2 are arranged at the inlet of the air inlet passage 96 and the lower inlet of the cooling air outlet duct 90 of the conventional radioactive material storage facility shown in FIG. Instead, below,
For convenience of explanation, an example in which the present invention is applied to the air outlet duct 90 will be described.
【００２７】翼板ユニット１０の翼板１は左上がりに角
度θで傾斜し、所定のピッチＰで複数枚（図では５枚）
を面が平行になるように配置され、両端は対向する壁８
０に固定されている。翼板１の厚さはｔで、その傾斜は
放射線を吸収効率の高い材料からなり、例えば、厚さｔ
＝１００〜５００mmのコンクリート板からなる。The wing plate 1 of the wing plate unit 10 is inclined leftward at an angle θ, and a plurality of sheets (five sheets in the figure) are provided at a predetermined pitch P.
Are arranged so that the faces are parallel, and both ends are opposed to each other by walls 8.
It is fixed to 0. The thickness of the blade 1 is t, and its inclination is made of a material having a high radiation absorption efficiency.
= 100-500 mm concrete plate.
【００２８】翼板ユニット１１の翼板２は翼板１とは逆
に角度θで右上がりの傾斜を有してピッチＰで複数枚配
列し、互いにその面が平行で両端は同じく対向する壁８
０に固定されている。翼板２の厚さは、同じくｔで、翼
板１と同じ寸法、材料から構成される。The wing plate 2 of the wing plate unit 11 has a plurality of walls arranged at a pitch P with a slant of an angle .theta. 8
It is fixed to 0. The blade 2 has the same thickness t and is made of the same dimensions and material as the blade 1.
【００２９】又、翼板ユニット１１，１２の上下方向の
幅はＨとし、それぞれ上下方向に間隔Ｄで配置される。
これら翼板ユニット１１，１２の組は、同じくペアで上
下に配置され、図示の例では上から下へ翼板ユニット１
０，１１、１０，１１の順で４段が間隔Ｄで配置されて
いる。もちろん、必要に応じてこれらを４段以上に配置
しても良い。この時の翼板１，２の傾斜角度θは４０〜
７０度、好ましくは５４度に設定され、又、ＨとＤ及び
Ｐの関係はほぼ等しい寸法（Ｈ≒Ｄ≒Ｐ）にすることが
好ましい。更に翼板１と２との位置関係は、図示のよう
に翼板１の下端の位置Ｐ1 、その１つ前方の翼板１の位
置をＰ2 とすれば、翼板２の上端位置はＰ1 とＰ2 のほ
ぼ中間のＰ3 となるように（Ｐ2 ＞Ｐ3 ＞Ｐ1 ）配置す
る。The width of the blade units 11 and 12 in the vertical direction is H, and the blade units 11 and 12 are arranged at intervals D in the vertical direction.
These sets of blade units 11 and 12 are also arranged in pairs vertically, and in the illustrated example, the blade units 1 are arranged from top to bottom.
Four stages are arranged at intervals D in the order of 0, 11, 10, and 11. Of course, these may be arranged in four or more stages as needed. At this time, the inclination angle θ of the wing plates 1 and 2 is 40 to
The angle is set to 70 degrees, preferably 54 degrees, and the relation between H, D, and P is preferably substantially equal (H ≒ D ≒ P). Furthermore the positional relationship between the two vanes 1, the position P 1 of the lower end of Tsubasaban 1 as shown, if the position of the vanes 1 of the one front and P 2, the upper end position of the vanes 2 P 1 and to be substantially intermediate between P 3 of P 2 (P 2> P 3 > P 1) to place.
【００３０】上記構成の排気ダクト流路構造において、
冷却空気出口ダクト９０の下方から流れてくる空気Ｇは
翼板２がピッチＰで配列している空間を実線Ｙで示すよ
うに斜め右上がりに流入し、その後翼板１がピッチＰで
配列している空間を左上がりに斜めに上昇し、図示のよ
うに滑らかな曲線で流れるので、流れの圧損が抑制され
る。又、空気中に含まれる放射線は図中Ｘ1 ，Ｘ2 で示
すように１列目の翼板２に当り、吸収されると共に、残
りの放射性の粒子は反射して隣接する翼板２に当たる
か、又は２列目の翼板１に当り、順次翼板１から２へと
多重反射しながら翼板１，２へ吸収され、上部から流出
する際には基準の放射線の量以下となり、放射線の外部
への遮蔽がなされるものである。In the exhaust duct flow path structure having the above structure,
Air G flowing from below the cooling air outlet duct 90 flows obliquely upward to the right as shown by the solid line Y in the space where the blades 2 are arranged at the pitch P, and then the blades 1 are arranged at the pitch P. Since the space rises obliquely upward to the left and flows in a smooth curve as shown in the figure, the pressure loss of the flow is suppressed. Radiation contained in the air impinges on the first row of blades 2 as indicated by X 1 and X 2 in the figure, and is absorbed, while the remaining radioactive particles are reflected and impinge on adjacent blades 2. Or, it hits the wing plate 1 in the second row, is absorbed by the wing plates 1 and 2 while being sequentially reflected multiple times from the wing plates 1 to 2, and when flowing out from the upper part, the radiation amount becomes equal to or less than the reference radiation amount. Is shielded from the outside.
【００３１】図２は本発明の実施の第２形態に係るダク
ト放射線遮蔽構造の翼板の形状を示す図である。本実施
の第２形態における翼板１２は翼の端面が滑らかな曲
面、又は円形状の面とし端面での鋭部をなくし、気流が
滑らかに沿って流れるような形状としたものである。そ
の他の構成、作用は図１で説明した実施の第１形態のも
のと同じであるので説明は省略する。FIG. 2 is a view showing the shape of the blade of the duct radiation shielding structure according to the second embodiment of the present invention. The blade 12 in the second embodiment has a shape in which the end face of the wing is a smooth curved surface or a circular surface without sharp portions at the end face, and the air flow smoothly flows along the end face. Other configurations and operations are the same as those of the first embodiment described with reference to FIG.
【００３２】図３は本発明の実施の第３形態に係るダク
ト放射線遮蔽構造の１部断面図である。図において、上
段の翼板ユニットの翼板は中性子遮蔽材からなる翼板２
１であり、その材料は水素含有量が多い物質、即ちポリ
エチレン、パラフィン、レジン、Ｂ（ボロン）元素を含
む物質、等からなり中性子が放射線の大部分を占める場
合に中性子の吸収効率が高い材料である。又、下段の翼
板ユニットの翼板はγ線、Ｘ線の吸収効率が高い材料か
らなる翼板２２からなり、その材料は重元素、重密度物
質（Ｗ，Ｐｂ，Ｔａ，Ｆｅ，コンクリート，等）からな
り、γ線やＸ線が放射線の大部分を占める場合にγ線や
Ｘ線の吸収効率が高いものである。又、これら翼板２
１，２２は、いずれの遮蔽材も放射線のエネルギーが小
さい程吸収効率が高いものである。その他の配置、位
置、傾斜角、寸法、等の構成は図１に示す実施の第１形
態と同じである。FIG. 3 is a partial sectional view of a duct radiation shielding structure according to a third embodiment of the present invention. In the figure, the blade of the upper blade unit is a blade 2 made of a neutron shielding material.
1. The material is a material having a high hydrogen content, that is, a material containing polyethylene, paraffin, resin, a material containing B (boron) element, etc., and having a high neutron absorption efficiency when neutrons occupy most of the radiation. It is. The blades of the lower blade unit are composed of blades 22 made of a material having high absorption efficiency of γ-rays and X-rays, and the materials are heavy elements, heavy-density substances (W, Pb, Ta, Fe, concrete, ), The absorption efficiency of γ-rays and X-rays is high when γ-rays and X-rays occupy most of the radiation. In addition, these wing plates 2
Nos. 1 and 22 have a higher absorption efficiency as the radiation energy of each shielding material is smaller. The other arrangements, positions, inclination angles, dimensions, and the like are the same as those of the first embodiment shown in FIG.
【００３３】上記の実施の第３形態に係るダクト放射線
遮蔽構造においては、中性子やγ線、Ｘ線が混在する場
合に適用されるものである。放射性物質がγ線、Ｘ線が
多く、これらが問題となる時には、まず下段の翼板２２
が配列する翼板ユニットでγ線、Ｘ線を吸収し、残りの
粒子を翼板２１が配列する上段の翼板ユニットに流し、
中性子を吸収する。又、高エネルギーの中性子が問題の
時にも、まず下段の翼板２２で中性子を非弾性散乱でエ
ネルギーを低下させ、上段の翼板２１で中性子を吸収す
る。なお、図示の例ではユニットが２段の例であるが、
もちろん、これら翼板２１からなる上段、翼板２２から
なる下段の翼板ユニットを複数組上下に配置しても良
い。The duct radiation shielding structure according to the third embodiment is applied to a case where neutrons, γ rays, and X rays are mixed. When the radioactive materials are γ-rays and X-rays, and these pose a problem, first, the lower blade 22
Absorbs γ-rays and X-rays in the blade unit where the blades are arranged, and flows the remaining particles to the upper blade unit where the blades 21 are arranged.
Absorb neutrons. Further, even when high energy neutrons are a problem, the neutrons are first reduced in energy by inelastic scattering by the lower blades 22, and the neutrons are absorbed by the upper blades 21. In the illustrated example, the unit has two stages,
Of course, a plurality of sets of upper and lower blade units composed of the blades 21 and lower blades 22 may be arranged vertically.
【００３４】又、これら翼板２２を中性子用ではなく翼
板２１と同じ材料のγ線、Ｘ線を吸収する材料とし、上
段、下段の翼板２１，２２の材料をすべてγ線、Ｘ線吸
収用のみとしても良く、又、これら翼板２１，２２をす
べて中性子吸収用の材料で構成しても良いものであり、
貯蔵する放射性物質に応じて適宜選択すれば良いもので
ある。The blades 22 are not made of neutrons, but are made of the same material as that of the blades 21 to absorb γ-rays and X-rays, and the materials of the upper and lower blades 21 and 22 are all γ-rays and X-rays. The wing plates 21 and 22 may be all made of a neutron absorbing material.
What is necessary is just to select suitably according to the radioactive substance to be stored.
【００３５】図４は本発明の実施の第４形態に係るダク
ト放射線遮蔽構造の１部断面図である。図において、上
段の翼板ユニットはγ線やＸ線吸収用の材料からなる翼
板３１と中性子吸収用の材料からなる翼板４１とを交互
に配列して構成する。下段の翼板ユニットも同様にγ線
やＸ線吸収用の材料からなる翼板３２と中性子吸収用の
材料からなる翼板４２を交互に配置する。その他の配
置、寸法、傾斜角、等の構成や位置関係は図１に示す実
施の第１形態と同じである。FIG. 4 is a partial sectional view of a duct radiation shielding structure according to a fourth embodiment of the present invention. In the figure, the upper blade unit is configured by alternately arranging blades 31 made of a material for absorbing γ-rays and X-rays and blades 41 made of a material for absorbing neutrons. Similarly, in the lower blade unit, the blades 32 made of a material for absorbing γ-rays and X-rays and the blades 42 made of a material for absorbing neutrons are alternately arranged. Other arrangements, dimensions, inclination angles, and other configurations and positional relationships are the same as those of the first embodiment shown in FIG.
【００３６】上記の実施の第４形態においても、放射線
に中性子、γ線、Ｘ線が混在する場合に有効なもので、
これら中性子、γ線、Ｘ線を平均して吸収でき、上記実
施の第３形態と同様の効果が得られる。もちろん、これ
ら翼板ユニットを２段以上の複数段に配置しても良いも
のである。The fourth embodiment is also effective when neutrons, γ-rays, and X-rays are mixed in the radiation.
These neutrons, γ-rays, and X-rays can be absorbed on average, and the same effect as in the third embodiment can be obtained. Of course, these blade units may be arranged in two or more stages.
【００３７】図５は本発明の実施の第５形態に係るダク
ト放射線遮蔽構造の１部断面図である。図において、本
実施の第５形態の翼板５２は一方の面が中性子吸収用の
材料５２ａからなり、他方の面がγ線、Ｘ線吸収用の材
料５２ｂからなり、これら５２ａ，５２ｂを重ね合わせ
て１枚の翼板５２とした構造である。その他の翼板の配
置、傾斜角、寸法、位置、傾斜、等は図１に示す実施の
第１形態と同じである。FIG. 5 is a partial sectional view of a duct radiation shielding structure according to a fifth embodiment of the present invention. In the figure, the blade 52 of the fifth embodiment has one surface made of a material 52a for absorbing neutrons and the other surface made of a material 52b for absorbing γ-rays and X-rays. This is a structure in which one wing plate 52 is combined. Other arrangements, inclination angles, dimensions, positions, inclinations, and the like of the blades are the same as those of the first embodiment shown in FIG.
【００３８】なお、図示の例では、翼板５２の右側の面
が中性子吸収用の材料５２ａ、左側がγ線、Ｘ線吸収用
の材料５２ｂの翼板を配列した例で示しているが、これ
を逆にして右側の面を５２ｂ、左側の面を５２ａとして
も良く、又は、右側の面が５２ａで左側の面が５２ｂの
翼板と、この面を逆にした翼板とを混在して配置しても
良いものである。In the example shown in the figure, the right side of the blade 52 is arranged with neutron absorbing material 52a, and the left side with γ-ray and X-ray absorbing material 52b. Alternatively, the right side may be 52b and the left side may be 52a, or a right side 52a and a left side 52b vane, and a vane with the opposite side mixed. It may be arranged.
【００３９】上記構成の実施の第５形態においては、中
性子吸収用の材料５２ａとγ線とＸ線吸収用の材料５２
ｂとの二重構造の翼板５２を配列した翼板ユニットを１
段のみ配置し、中性子、γ線、Ｘ線が混在する放射線の
遮蔽を行う場合に、これらを平均的にむらなく吸収する
ものである。１段では放射線の遮蔽が不充分の場合に
は、次の図６で説明する多段構成の実施の第６形態のも
のを適用する。In the fifth embodiment having the above structure, the material 52a for absorbing neutrons and the material 52a for absorbing γ-rays and X-rays are used.
The blade unit in which the blades 52 having a double structure with
When only the steps are arranged and the neutrons, γ-rays, and X-rays are to be shielded, these are absorbed evenly on average. In the case where the shielding of radiation is insufficient at one stage, the sixth embodiment of the multistage configuration described with reference to FIG. 6 below is applied.
【００４０】図６は本発明の実施の第６形態に係るダク
ト放射線遮蔽構造の断面図である。図において、本実施
の第６形態では図５に示す実施の第５形態の翼板ユニッ
トを図１に示す実施の第１形態の配置のように多段構成
としたものである。図において、上段の翼板ユニットは
中性子吸収用の材料５３ａとγ線、Ｘ線吸収用の材料５
３ｂとの二重構造の翼板５３を傾斜させて配列し、下段
の翼板ユニットは図５の例と同じく、中性子吸収用材料
５２ａとγ線、Ｘ線吸収用の材料５２ｂとの二重構造の
翼板５２を配列した構成である。翼板の配列、位置、傾
斜角、ピッチ、ユニット間隔、等は図１に示した実施の
第１形態のものと同じである。FIG. 6 is a sectional view of a duct radiation shielding structure according to a sixth embodiment of the present invention. In the figure, in the sixth embodiment, the blade unit according to the fifth embodiment shown in FIG. 5 has a multi-stage configuration like the arrangement of the first embodiment shown in FIG. In the figure, the upper blade unit is composed of a material 53a for absorbing neutrons and a material 5 for absorbing γ-rays and X-rays.
The blades 53 having a double structure with the neutron absorbing material 52a and the γ-ray and X-ray absorbing materials 52b are arranged in the lower stage as in the example of FIG. This is a configuration in which wing plates 52 having a structure are arranged. The arrangement, position, inclination angle, pitch, unit interval, and the like of the blades are the same as those of the first embodiment shown in FIG.
【００４１】上記の実施の第６形態においては、中性
子、γ線、Ｘ線が混在する放射線の場合には、図中実線
で示す中性子と図中点線で示すγ線、Ｘ線は下段から流
入し、翼板５２の材料５２ｂではγ線、Ｘ線を吸収し、
材料５２ａでは中性子を吸収しながら多重反射して上段
のユニットへ入り、順次放射能を吸収して基準以下に放
射能を抑えることができる。又、この場合に、中性子が
高エネルギーの時には下段に入射した中性子は、まず翼
板５２の材料５２ｂに衝突して非弾性散乱でエネルギー
が低下し、上段の翼板ユニットへ流入すると材料５３ａ
からなる翼板５３に衝突し、中性子が吸収される。In the sixth embodiment, in the case of radiation containing a mixture of neutrons, γ-rays and X-rays, neutrons indicated by solid lines and γ-rays and X-rays indicated by dotted lines in FIG. The material 52b of the wing plate 52 absorbs γ-rays and X-rays,
The material 52a absorbs neutrons and makes multiple reflections and enters the upper unit, and sequentially absorbs radioactivity to suppress the radioactivity below the standard. In this case, when the neutrons have high energy, the neutrons incident on the lower stage first collide with the material 52b of the wing plate 52, and the energy is reduced by inelastic scattering.
And the neutrons are absorbed.
【００４２】図７は本発明の実施の第７形態に係るダク
ト放射線遮蔽構造を示し、（ａ）は翼板ユニットの側面
図、（ｂ）〜（ｄ）はそれぞれ翼板を可動させて傾斜角
を変えた場合の側面図である。（ａ）において、１４は
翼板ユニット全体であり、１５は翼板でピッチＰで互い
に平行に配列し各翼板１５は中心において回転自在に固
定用軸１６で冷却空気ダクトの両壁面に取付けられてい
る。１８は連結用ピンで各翼板１５の両端に設けられ、
連結バー１７ａ，１７ｂに翼板１５が左右に固定用軸１
６を中心として回動自在に取付けられている。7A and 7B show a duct radiation shielding structure according to a seventh embodiment of the present invention. FIG. 7A is a side view of a blade unit, and FIGS. It is a side view at the time of changing a corner. In (a), reference numeral 14 denotes an entire blade unit, 15 denotes blades arranged in parallel with each other at a pitch P, and each blade 15 is rotatably mounted at the center by a fixing shaft 16 on both wall surfaces of a cooling air duct. Have been. 18 are connecting pins provided at both ends of each wing plate 15,
The wing plate 15 is fixed to the connecting bars 17a and 17b from side to side.
6 is attached so as to be freely rotatable.
【００４３】（ｂ）は連結バー１７ａ，１７ｂを操作し
て各翼板１５を回動させ、各翼板１５が空気流れＲに平
行に配置させた例である。この場合には空気の流れの抵
抗が最も小さくでき、圧損を最小にすることができる
が、反面放射線の遮蔽効果が小さくなる。（ｃ）は連結
バー１７ａを左方向へ押し、連結バー１７ｂを右方向へ
引くことにより各翼板１５を左上がりに傾斜させた例で
あり、各翼板を実施の第１〜第６形態で示すように傾斜
させ、圧損を抑制し、かつ放射線遮蔽の効果を最大にす
るような最適な角度に調整し、設定することができる。
（ｄ）は更に各翼板１５を傾斜させ、隣接する翼板同志
の間隔を小さくし、又は完全に閉じることができる。FIG. 4B shows an example in which each of the blades 15 is rotated by operating the connecting bars 17a and 17b, and each of the blades 15 is arranged in parallel to the air flow R. In this case, the resistance of the air flow can be minimized and the pressure loss can be minimized, but the radiation shielding effect is reduced. (C) is an example in which the connecting bar 17a is pushed leftward and the connecting bar 17b is pulled rightward to incline each wing plate 15 to the left, and each wing plate is in the first to sixth embodiments. The angle can be adjusted and set to an optimum angle that suppresses pressure loss and maximizes the effect of radiation shielding as shown by.
In (d), each blade 15 can be further inclined to reduce the distance between adjacent blades or to completely close the blades.
【００４４】図８は上記の実施の第７形態の翼板ユニッ
トの駆動を示し、（ａ）は全体の側面図、（ｂ）は
（ａ）におけるＢ−Ｂ矢視図である。（ａ）において、
各翼板１５は固定用軸１６で回転自在に冷却空気入口及
び出口ダクトの両壁面に取付けられ、各翼板１５の両端
は連結用ピン１８でそれぞれ連結用バー１７ａ，１７ｂ
に連結され、連結用バー１７ａ，１７ｂの端は結合バー
１９でモータ６５の回転軸へ取付けられ、モータ６５が
回転することにより結合バーを左右に回動させ、連結用
バー１７ａ，１７ｂを交互に反対方向に移動させること
により、各翼板１５の傾斜角を変化させることができ
る。FIGS. 8A and 8B show the driving of the blade unit according to the seventh embodiment. FIG. 8A is a side view of the whole, and FIG. 8B is a view taken along the line BB in FIG. In (a),
Each blade 15 is rotatably attached to both walls of the cooling air inlet and outlet ducts by a fixing shaft 16, and both ends of each blade 15 are connected by connecting pins 18 to connecting bars 17a, 17b, respectively.
The ends of the connecting bars 17a, 17b are attached to the rotating shaft of the motor 65 by connecting bars 19, and the connecting bars are rotated left and right by the rotation of the motor 65, thereby alternately connecting the connecting bars 17a, 17b. , The inclination angle of each blade 15 can be changed.
【００４５】（ｂ）は駆動部の詳細を示し、モータ６５
は冷却空気入口及び出口ダクトの壁面に取付けられてお
り、連結用バー１７ａは連結用ピン１８でそれぞれ翼板
１５に連結され、モータ６５が回転して連結用バー１７
ａが左右に移動すると、翼板１５は連動して固定用軸１
６を中心として回転し、その傾斜角が変わる構成であ
る。もちろん、モータ６５を用いずに手動で連結用バー
１７ａ，１７ｂを操作するようにしても良い。FIG. 4B shows the details of the drive unit.
Are connected to the wall surfaces of the cooling air inlet and outlet ducts, and the connecting bars 17a are connected to the blades 15 by connecting pins 18 respectively.
When a moves left and right, the wing plate 15 moves in conjunction with the fixing shaft 1.
6, the inclination angle is changed. Of course, the connecting bars 17a and 17b may be manually operated without using the motor 65.
【００４６】上記に説明の実施の第７形態の構造は、図
１〜図６に示す実施の第１〜第６形態に示すダクト放射
線遮蔽構造に適用して各翼板を回転させることができる
もので、各翼板の傾斜角を変化させて開口部の流路の角
度を調節し、放射線や空気流量の変動に対応して調節で
きるものである。特に放射線の漏れ等の事故時にはダク
ト流路を全閉にできるので有効な手段となる。The structure of the seventh embodiment described above can be applied to the duct radiation shielding structure shown in the first to sixth embodiments shown in FIGS. 1 to 6 to rotate each blade. The angle of the flow path of the opening is adjusted by changing the inclination angle of each blade, and can be adjusted in response to the fluctuation of radiation or air flow. Particularly in the event of an accident such as radiation leakage, the duct flow path can be completely closed, which is an effective means.
【００４７】以上説明の実施の第１〜第７形態のダクト
放射線遮蔽構造によれば、放射線遮蔽と圧損の抑制の効
果を両立させることができ、冷却空気出口ダクト９０の
流路の簡略化と、圧損が低減するために自然循環による
空気の流通が良くなり、冷却効果も増すものである。According to the duct radiation shielding structures of the first to seventh embodiments described above, the radiation shielding effect and the effect of suppressing pressure loss can be achieved at the same time, and the flow path of the cooling air outlet duct 90 can be simplified. In addition, since the pressure loss is reduced, the circulation of air by natural circulation is improved, and the cooling effect is also increased.
【００４８】[0048]
【発明の効果】本発明の放射性物質貯蔵施設の排気ダク
ト流路構造は、（１）放射性物質を貯蔵する施設に空気
入口ダクトから空気を流入させ同放射性物質を冷却し、
冷却後の空気を空気出口ダクトより流出させるダクト放
射線遮蔽構造であって、前記空気入口及び出口ダクトの
途中上下方向に所定の間隔を保って翼板ユニットを多段
に配置して構成され、同各翼板ユニットは、空気流れ方
向と直交する方向に伸びる翼板を所定のピッチで多数横
方向へ配列すると共に、各翼板はそれぞれ面が平行とな
るように傾斜して配列し、更に上又は下へ隣接する翼板
ユニットの翼板は同隣接するユニット同志で互いに逆方
向の傾きであり、かつ横方向の位置が互いにずれて配置
されていることを特徴としている。According to the present invention, the exhaust duct flow path structure of the radioactive substance storage facility has the following features. (1) Air flows into the facility for storing radioactive substance from the air inlet duct to cool the radioactive substance,
A duct radiation shielding structure for allowing cooled air to flow out of an air outlet duct, wherein the air inlet and outlet ducts are configured by arranging wing plate units in multiple stages at predetermined intervals in the vertical direction on the way. The wing plate unit arranges a large number of wing plates extending in a direction orthogonal to the air flow direction in a horizontal direction at a predetermined pitch, and arranges each wing plate at an angle so that the surfaces are parallel to each other, and further above or The blades of the blade unit adjacent to the lower side are characterized in that the adjacent units are inclined in opposite directions to each other and the lateral positions are shifted from each other.
【００４９】上記構成により、従来のように急激な流出
方向の変化がなく流れの圧損を最小限に抑えることがで
きる。又、空気中に含まれる放射性の粒子は、各段での
ユニットの翼板が傾斜し、更にその傾斜も上下に隣接す
るユニットにおいて逆方向に傾斜し、これに加え上下の
ユニットでは翼板の位置が横方向でずれて配置されてい
るので、直進して流入して翼板に衝突して一部が吸収さ
れ、残りは上段の翼板に衝突し、一部が吸収され、順次
多重反射して衝突／吸収を繰り返して流出する。従って
空気出口ダクトから空気が流出する位置では放射能のレ
ベルは基準の制限値以下となる。With the above configuration, there is no sudden change in the outflow direction as in the prior art, and the pressure loss of the flow can be minimized. In addition, radioactive particles contained in the air cause the blades of the unit at each stage to tilt, and the tilt also tilts in the opposite direction in vertically adjacent units. Since the position is shifted in the horizontal direction, it goes straight and flows in and collides with the vane plate, and a part is absorbed, and the rest collides with the upper blade, a part is absorbed, and multiple reflection is sequentially performed And spill repeatedly after repeated collision / absorption. Therefore, at the position where air flows out of the air outlet duct, the level of radioactivity is lower than the reference limit value.
【００５０】本発明の（２）では、翼板ユニットの高
さ、間隔、翼板のピッチがそれぞれほぼ等しい寸法で構
成され、このような構成では圧損の抑制と放射能の遮蔽
効果の両方が満足され、両方の効果が高い構成とするこ
とができる。又、本発明の（３）では翼板の両縁部が滑
らかな曲面で形成されるので、空気の流れ抵抗が小さく
なり、圧損低減の効果が向上する。In (2) of the present invention, the height, interval, and blade pitch of the blade units are substantially equal to each other. In such a configuration, both the suppression of pressure loss and the shielding effect of radioactivity are achieved. Satisfaction is achieved, and a configuration in which both effects are high can be achieved. Further, in (3) of the present invention, since both edges of the blade are formed with a smooth curved surface, the air flow resistance is reduced and the effect of reducing pressure loss is improved.
【００５１】本発明の（４）では上下の翼板ユニットに
おいて、一方のユニットは中性子の吸収率が高い翼板で
あり、他方のユニットの翼板はγ線又はＸ線の吸収率が
高い翼板であるので、中性子やγ線、Ｘ線が混在した放
射線の場合には特に有効となるものである。In (4) of the present invention, in the upper and lower blade units, one unit is a blade having a high neutron absorption rate, and the other unit blade is a blade having a high γ-ray or X-ray absorption rate. Since it is a plate, it is particularly effective in the case of radiation containing a mixture of neutrons, γ-rays, and X-rays.
【００５２】本発明の（５）では、翼板ユニットの翼板
は中性子の吸収率が高い翼板とγ線、Ｘ線の吸収率の高
い翼板とが交互に横方向に配列しており、又、本発明の
（６）では、翼板ユニットの翼板は、一方の側面が中性
子の吸収率の高い材料、他方の側面がγ線又はＸ線の吸
収率の高い材料の二重構造であるので、上記（４）の発
明と同様に、中性子、γ線、Ｘ線が混在している場合に
適用すると放射線の吸収効率が高まるものである。In (5) of the present invention, the wing plates of the wing plate unit are such that wing plates having a high neutron absorption rate and wing plates having a high γ-ray and X-ray absorption rates are alternately arranged in the lateral direction. Also, in (6) of the present invention, the blade plate of the blade unit has a double structure in which one side surface is made of a material having a high neutron absorption rate and the other side face is made of a material having a high γ-ray or X-ray absorption rate. Therefore, similarly to the invention of the above (4), when applied to a case where neutrons, γ-rays, and X-rays are mixed, the radiation absorption efficiency is increased.
【００５３】本発明の（７）では、翼板ユニットの各翼
板は連結バーを横方向に動かすことにより、連動してそ
の傾斜角を変化させることができるので、放射線量、空
気流量が変動した時に対応が可能となる。特に、放射線
の漏れ等の事故時にはダクト流路を全閉にできるので有
効な手段となる。In (7) of the present invention, the inclination angle of each blade of the blade unit can be changed in conjunction with the lateral movement of the connecting bar, so that the radiation dose and air flow rate fluctuate. When it does, correspondence becomes possible. In particular, in the event of an accident such as radiation leakage, the duct flow path can be completely closed, which is an effective means.
【００５４】本発明の（８）では、翼板の傾斜角度を水
平面に対して４０〜７０度に設定するので、この範囲で
は空気の流れが滑らかになり圧損を抑えることができる
と共に、放射能の遮蔽効果が良好となり、両者の効果を
両立させ冷却効果を生かして放射能の漏れを規制値以下
に抑えることができる。In (8) of the present invention, the inclination angle of the blade is set at 40 to 70 degrees with respect to the horizontal plane, so that the air flow becomes smooth in this range, pressure loss can be suppressed, and radioactivity is reduced. The shielding effect of the present invention can be improved, the effects of the two can be reconciled, the cooling effect can be utilized, and the leakage of radioactivity can be suppressed to a regulated value or less.
【図面の簡単な説明】[Brief description of the drawings]
【図１】本発明の実施の第１形態に係るダクト放射線遮
蔽構造を示し、（ａ）は縦断面図、（ｂ）は（ａ）のＡ
−Ａ断面図である。FIG. 1 shows a duct radiation shielding structure according to a first embodiment of the present invention, in which (a) is a longitudinal sectional view and (b) is A of (a).
It is -A sectional drawing.
【図２】本発明の実施の第２形態に係るダクト放射線遮
蔽構造の翼板形状を示す側面図である。FIG. 2 is a side view illustrating a blade shape of a duct radiation shielding structure according to a second embodiment of the present invention.
【図３】本発明の実施の第３形態に係るダクト放射線遮
蔽構造の断面図である。FIG. 3 is a sectional view of a duct radiation shielding structure according to a third embodiment of the present invention.
【図４】本発明の実施の第４形態に係るダクト放射線遮
蔽構造の断面図である。FIG. 4 is a sectional view of a duct radiation shielding structure according to a fourth embodiment of the present invention.
【図５】本発明の実施の第５形態に係るダクト放射線遮
蔽構造の断面図である。FIG. 5 is a sectional view of a duct radiation shielding structure according to a fifth embodiment of the present invention.
【図６】本発明の実施の第６形態に係るダクト放射線遮
蔽構造の断面図である。FIG. 6 is a sectional view of a duct radiation shielding structure according to a sixth embodiment of the present invention.
【図７】本発明の実施の第７形態に係るダクト放射線遮
蔽構造を示し、（ａ）は側面図、（ｂ），（ｃ），
（ｄ）は、それぞれ翼板の傾斜角度を変化させた状態を
示す図である。FIG. 7 shows a duct radiation shielding structure according to a seventh embodiment of the present invention, wherein (a) is a side view, and (b), (c),
(D) is a figure which shows the state which changed the inclination angle of each blade.
【図８】本発明の実施の第７形態に係る翼板ユニットを
示し、（ａ）はユニットの側面図、（ｂ）は（ａ）にお
けるＢ−Ｂ矢視図である。8A and 8B show a blade unit according to a seventh embodiment of the present invention, wherein FIG. 8A is a side view of the unit, and FIG. 8B is a view taken along the line BB in FIG.
【図９】従来のダクト放射線遮蔽構造の翼板ユニットを
示し、（ａ）は翼板を交互に配列した断面図、（ｂ）は
くの字状の通路を有するユニット、（ｃ）はジグザグ状
通路を有するユニットの断面図である。9A and 9B show a conventional wing plate unit having a duct radiation shielding structure, in which FIG. 9A is a cross-sectional view in which wing plates are alternately arranged, FIG. 9B is a unit having a U-shaped passage, and FIG. FIG. 4 is a cross-sectional view of a unit having a passage.
【図１０】放射性物質貯蔵施設の一例を示す断面図であ
る。FIG. 10 is a sectional view showing an example of a radioactive substance storage facility.
１，２，１２，１５，２１，２２ 翼板 ３１，３２，４１，４２，５２，５３ 翼板 １０，１１，１４ 翼板ユニッ
ト １６ 固定用軸 １７ａ，１７ｂ 連結用バー １８ 連結用ピン １９ 結合バー ６５ モータ ９０ 冷却空気出
口ダクト ９６ 空気流入通
路1,2,12,15,21,22 Wing plate 31,32,41,42,52,53 Wing plate 10,11,14 Wing plate unit 16 Fixing shaft 17a, 17b Connection bar 18 Connection pin 19 Connection Bar 65 Motor 90 Cooling air outlet duct 96 Air inflow passage
フロントページの続き (72)発明者 入野 光博 兵庫県高砂市荒井町新浜２丁目１番１号 三菱重工業株式会社高砂研究所内 (72)発明者 祝 一裕 神戸市兵庫区和田崎町一丁目１番１号 三 菱重工業株式会社神戸造船所内 (72)発明者 森嶋 誠 神戸市兵庫区和田崎町一丁目１番１号 三 菱重工業株式会社神戸造船所内 (72)発明者 邨沢 憲治 神戸市兵庫区和田崎町一丁目１番１号 三 菱重工業株式会社神戸造船所内 Ｆターム(参考） 3L080 AA03 Continued on the front page (72) Inventor Mitsuhiro Irino 2-1-1, Shinhama, Arai-machi, Takasago-shi, Hyogo Inside Mitsubishi Heavy Industries, Ltd. Takasago Research Laboratory (72) Inventor Ichihiro 1-1-1, Wadazakicho, Hyogo-ku, Kobe-shi No. 3 Rishi Heavy Industries, Ltd.Kobe Shipyard (72) Inventor Makoto Morishima 1-1-1, Wadazakicho, Hyogo-ku, Kobe-shi Within Mitsui Heavy Industries, Ltd.Kobe Shipyard (72) Inventor Kenji Sonosawa Hyogo-ku, Kobe City 1-1 1-1 Tazakicho Sanshi Heavy Industries, Ltd. Kobe Shipyard, F-term (reference) 3L080 AA03
Claims (8)
クトから空気を流入させ同放射性物質を冷却し、冷却後
の空気を空気出口ダクトより流出させるダクト放射線遮
蔽構造であって、前記空気入口及び出口ダクトの途中上
下方向に所定の間隔を保って翼板ユニットを多段に配置
して構成され、同各翼板ユニットは、空気流れ方向と直
交する方向に伸びる翼板を所定のピッチで多数横方向へ
配列すると共に、各翼板はそれぞれ面が平行となるよう
に傾斜して配列し、更に上又は下へ隣接する翼板ユニッ
トの翼板は同隣接するユニット同志で互いに逆方向の傾
きであり、かつ横方向の位置が互いにずれて配置されて
いることを特徴とするダクト放射線遮蔽構造。1. A duct radiation shielding structure for flowing air from an air inlet duct into a facility for storing radioactive material to cool the radioactive material, and for allowing the cooled air to flow out from the air outlet duct. The blade duct units are arranged in multiple stages at predetermined intervals in the vertical direction in the middle of the outlet duct, and each blade unit has a large number of blades extending in a direction perpendicular to the air flow direction at a predetermined pitch. The blades of the blade units adjacent to each other in the upward or downward direction are tilted in the opposite directions with respect to the adjacent units. A duct radiation shielding structure, characterized in that the duct radiation shielding structures are arranged so as to be shifted from each other in the lateral direction.
下の翼板ユニット同志の間隔、及び前記翼板のピッチは
それぞれほぼ等しい寸法であることを特徴とする請求項
１記載のダクト放射線遮蔽構造。2. The duct radiation according to claim 1, wherein the height of the blade unit in the vertical direction, the distance between the upper and lower blade units, and the pitch of the blades are substantially equal. Shielding structure.
れていることを特徴とする請求項１記載のダクト放射線
遮蔽構造。3. The duct radiation shielding structure according to claim 1, wherein both edges of the vane plate are formed with smooth curved surfaces.
方のユニットの翼板の材料が中性子の吸収率の高い材料
からなり、他方のユニットの翼板の材料がγ線又はＸ線
の吸収率の高い材料からなることを特徴とする請求項１
記載のダクト放射線遮蔽構造。4. The wing plate units arranged above and below are arranged such that the wing plate material of one unit is made of a material having a high neutron absorption rate, and the wing plate material of the other unit is made of a material that absorbs γ-rays or X-rays. 2. A high-rate material.
The described duct radiation shielding structure.
性子の吸収率の高い材料からなる翼板とγ線又はＸ線の
吸収率の高い材料からなる翼板とを交互に配列して構成
したことを特徴とする請求項１記載のダクト放射線遮蔽
構造。5. The wing plate of the wing plate unit is configured such that a wing plate made of a material having a high neutron absorption rate and a wing plate made of a material having a high γ-ray or X-ray absorption rate are alternately arranged. The duct radiation shielding structure according to claim 1, wherein the duct radiation shielding structure is configured as follows.
を中性子の吸収率の高い材料で形成し、他方の側面をγ
線又はＸ線の吸収率の高い材料で形成する二重構造で構
成されることを特徴とする請求項１記載のダクト放射線
遮蔽構造。6. The wing plate of the wing plate unit has one side surface formed of a material having a high neutron absorption rate, and the other side surface having a γ
2. The duct radiation shielding structure according to claim 1, wherein the radiation shielding structure has a double structure formed of a material having a high absorptivity of X-rays or X-rays.
結バーで連結されると共に、中心で回転可能に両側にお
いて前記空気出口ダクト両壁面に取付けられ、前記連結
バーを横方向に移動させることにより翼板の傾斜角度を
調整可能とすることを特徴とする請求項１記載のダクト
放射線遮蔽構造。7. The blades of each blade unit are laterally connected by a connecting bar, and are rotatably mounted on both sides of the air outlet duct on both sides so as to be rotatable at the center, and move the connecting bar in the lateral direction. 2. The duct radiation shielding structure according to claim 1, wherein the inclination angle of the blade is adjustable by causing the blade to tilt.
０〜７０度の範囲に設定されていることを特徴とする請
求項１記載のダクト放射線遮蔽構造。8. An inclination angle of the blade is 4 with respect to a horizontal plane.
The duct radiation shielding structure according to claim 1, wherein the duct radiation shielding structure is set in a range of 0 to 70 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000227422A JP2002040191A (en) | 2000-07-27 | 2000-07-27 | Radiation shield structure for duct |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000227422A JP2002040191A (en) | 2000-07-27 | 2000-07-27 | Radiation shield structure for duct |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002040191A true JP2002040191A (en) | 2002-02-06 |
Family
ID=18720879
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000227422A Pending JP2002040191A (en) | 2000-07-27 | 2000-07-27 | Radiation shield structure for duct |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002040191A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006513411A (en) * | 2003-01-06 | 2006-04-20 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Radiation detector with shield electronics for computed tomography |
| JP2008107061A (en) * | 2006-10-27 | 2008-05-08 | Toshiba Corp | Air-conditioning duct straightening plate slit, constructing method of air-conditioning duct straightening plate slit and radioactive substance storage building |
| JP2013104734A (en) * | 2011-11-11 | 2013-05-30 | Mitsubishi Heavy Ind Ltd | Radioactive material shielding structure and radioactive material storage facility |
| JP2013148434A (en) * | 2012-01-18 | 2013-08-01 | Mitsubishi Heavy Ind Ltd | Radioactive material storage facility |
| JP2013170891A (en) * | 2012-02-20 | 2013-09-02 | Ihi Corp | Radiation protection body |
| KR101665112B1 (en) * | 2016-03-28 | 2016-10-12 | 주식회사 프리쉐 | Air conditioning unit |
| JP2017049175A (en) * | 2015-09-03 | 2017-03-09 | 三菱重工業株式会社 | Screw for duct, duct, and radiation shielding facility |
-
2000
- 2000-07-27 JP JP2000227422A patent/JP2002040191A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006513411A (en) * | 2003-01-06 | 2006-04-20 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Radiation detector with shield electronics for computed tomography |
| JP4833554B2 (en) * | 2003-01-06 | 2011-12-07 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Radiation detector module, computed tomography scanner using the radiation detector module, and radiation detection method |
| JP2008107061A (en) * | 2006-10-27 | 2008-05-08 | Toshiba Corp | Air-conditioning duct straightening plate slit, constructing method of air-conditioning duct straightening plate slit and radioactive substance storage building |
| JP2013104734A (en) * | 2011-11-11 | 2013-05-30 | Mitsubishi Heavy Ind Ltd | Radioactive material shielding structure and radioactive material storage facility |
| JP2013148434A (en) * | 2012-01-18 | 2013-08-01 | Mitsubishi Heavy Ind Ltd | Radioactive material storage facility |
| JP2013170891A (en) * | 2012-02-20 | 2013-09-02 | Ihi Corp | Radiation protection body |
| JP2017049175A (en) * | 2015-09-03 | 2017-03-09 | 三菱重工業株式会社 | Screw for duct, duct, and radiation shielding facility |
| KR101665112B1 (en) * | 2016-03-28 | 2016-10-12 | 주식회사 프리쉐 | Air conditioning unit |
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