JPH0562898U - Radiation leakage prevention equipment in nuclear facilities - Google Patents
Radiation leakage prevention equipment in nuclear facilitiesInfo
- Publication number
- JPH0562898U JPH0562898U JP004669U JP466992U JPH0562898U JP H0562898 U JPH0562898 U JP H0562898U JP 004669 U JP004669 U JP 004669U JP 466992 U JP466992 U JP 466992U JP H0562898 U JPH0562898 U JP H0562898U
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- Prior art keywords
- radiation
- duct
- screw body
- screw
- substance
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Classifications
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- 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
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- 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
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Abstract
(57)【要約】
【目的】 全ての放射線の漏洩を確実に防止することが
できる放射線漏洩防止装置を提供することにある。
【構成】 原子力施設の放射線遮蔽壁１に貫通して設け
たダクト３中に、γ線の直進を妨げかつ気体の流通を妨
げないスクリュー形状をなすスクリュー体１０を設置
し、そのスクリュー体１０の内部に中空部１４を設け
る。この結果、各原子力施設において内蔵又は取り扱わ
れる放射性物質に対応して、中性子の遮蔽効果が大の物
質、γ線の遮蔽効果が大の物質、中性子及びγ線の遮蔽
効果が大の物質、のうち何れかの充填材１１を、スクリ
ュー体１０の中空部１４中に、充填することができる。
従って、全ての放射線を遮蔽することができると共に、
全ての放射線の漏洩を確実に防止することができる。ま
た、スクリュー体１０１、１０２とダクト３１、３２と
を一体構造となすことにより、放射線の漏洩を確実に防
ぐことができる。
(57) [Abstract] [Purpose] To provide a radiation leakage prevention device capable of reliably preventing all radiation leakage. [Structure] In a duct 3 penetrating the radiation shielding wall 1 of a nuclear facility, a screw body 10 having a screw shape that prevents the γ-rays from going straight and does not hinder the flow of gas is installed. A hollow portion 14 is provided inside. As a result, in response to the radioactive substances built in or handled in each nuclear facility, a substance with a large neutron shielding effect, a substance with a large γ-ray shielding effect, a substance with a large neutron and γ-ray shielding effect, Any one of the fillers 11 can be filled into the hollow portion 14 of the screw body 10.
Therefore, it is possible to shield all radiation,
It is possible to reliably prevent leakage of all radiation. Further, by forming the screw bodies 101 and 102 and the ducts 31 and 32 as an integral structure, it is possible to reliably prevent leakage of radiation.
Description
【０００１】[0001]
本考案は、原子力施設の給気及び排気用のダクトにおける放射線漏洩防止装置 に係り、特に各原子力施設において内蔵又は取り扱われる放射性物質に対応して 、全ての放射線を遮蔽することができると共に、全ての放射線の漏洩を確実に防 止することができる装置に関するものである。 The present invention relates to a radiation leakage prevention device for air supply and exhaust ducts of a nuclear facility, and in particular, it can shield all radiation in accordance with radioactive substances contained or handled in each nuclear facility. The present invention relates to a device that can reliably prevent the leakage of radiation.
【０００２】[0002]
原子力発電施設や核燃料再処理施設等の原子力施設は、その内部において放射 性物質を内蔵又は取り扱うので、放射線が外部に漏洩するのを防止する能力を充 分に持った放射線遮蔽壁で囲まれている。また、この放射線遮蔽壁には、給気及 び排気のためにダクトが貫通して設けられており、このダクトにおいても、上述 の放射線遮蔽壁の放射線漏洩防止能力とほぼ同等の能力を持たせることを目的と して放射線漏洩防止装置が設置されている。 以下、この種の従来の放射線漏洩防止装置を、図７乃至図９を参照して説明す る。 図において、１は主にコンクリート等で構築された原子力施設の放射線遮蔽壁 である。この放射線遮蔽壁１に断面円形の透孔２を貫通させて設ける。 ３は前記放射線遮蔽壁１の透孔２中に嵌合したダクトである。このダクト３は 、γ線の遮蔽効果が大である密度の高い金属からなり、長さが前記放射線遮蔽壁 １の厚さより若干長い円筒形状をなし、一開口端に前記放射線遮断壁１の面に当 接する鍔部４を一体に設ける。 ５は前記ダクト３中に設置した遮蔽体である。この遮蔽体５は、γ線の遮蔽効 果が大である密度の高い金属、例えばＳＣＳ１３、ＦＣ等の鋳造品等からなり、 γ線の直進を妨げかつ気体の流通を妨げないスクリュー形状をなす。すなわち、 この遮蔽体５は、軸部６に４条のスクリュー翼７を９０°ずつの角度で螺旋状に 一体に設けてなり、長さが前記ダクト３より若干短く、かつ外径が前記ダクト３ の内径とほぼ等しい寸法をなしている。 ８は環状形状をなす遮蔽リングである。この遮蔽リング８は、γ線の遮蔽効果 が大である密度の高い金属からなり、外径が前記ダクト３の内径とほぼ等しい寸 法をなしている。この遮蔽リング８を前記ダクト３中に嵌合すると共に、前記遮 蔽体５の両端に当接させる。この遮蔽リング８は、前記ダクト３の内周面と前記 遮蔽体５の外側面との間の隙間を漏洩する放射線（主にγ線）を遮蔽するもので ある。 かかる放射線漏洩防止装置においては、ダクト３中にスクリュー形状の遮蔽体 ５を設置したので、空気はダクト３と遮蔽体５のスクリュー翼７との間の空間を 螺旋状に回転しながら、原子力施設の放射線物質等を内蔵又は取り扱う空間の内 部から外部に又はその逆に上述の空間の外部から内部に流通する。一方、γ線は 直進しょうとするので、遮蔽体５のスクリュー翼７を透過又は反射透過する過程 で減衰され、ダクト３における放射線の漏洩を防止するものである。 Nuclear facilities such as nuclear power generation facilities and nuclear fuel reprocessing facilities contain or handle radioactive substances inside, so they are surrounded by radiation shielding walls that have sufficient ability to prevent radiation from leaking to the outside. There is. In addition, a duct penetrates through this radiation shielding wall for air supply and exhaust, and this duct also has the same capability as the radiation leakage prevention capability of the radiation shielding wall described above. For that purpose, a radiation leakage prevention device is installed. A conventional radiation leakage prevention device of this type will be described below with reference to FIGS. 7 to 9. In the figure, 1 is a radiation shielding wall of a nuclear facility mainly constructed of concrete or the like. A through hole 2 having a circular cross section is provided through the radiation shielding wall 1. Reference numeral 3 is a duct fitted in the through hole 2 of the radiation shielding wall 1. The duct 3 is made of a highly dense metal having a large γ-ray shielding effect, has a cylindrical shape whose length is slightly longer than the thickness of the radiation shielding wall 1, and has a surface of the radiation shielding wall 1 at one opening end. The collar portion 4 that comes into contact with is integrally provided. Reference numeral 5 is a shield installed in the duct 3. The shield 5 is made of a high-density metal having a large γ-ray shielding effect, such as a cast product such as SCS13, FC, etc., and has a screw shape that does not prevent γ-rays from traveling straight and does not interfere with gas flow. .. That is, the shield 5 has four screw blades 7 integrally provided on the shaft portion 6 in a spiral shape at an angle of 90 °, the length is slightly shorter than the duct 3, and the outer diameter is the duct. The size is almost equal to the inner diameter of 3. Reference numeral 8 is a shield ring having an annular shape. The shield ring 8 is made of a highly dense metal having a large γ-ray shield effect, and has an outer diameter substantially equal to the inner diameter of the duct 3. The shield ring 8 is fitted in the duct 3 and is brought into contact with both ends of the shield 5. The shield ring 8 shields radiation (mainly gamma rays) leaking through a gap between the inner peripheral surface of the duct 3 and the outer surface of the shield 5. In such a radiation leakage prevention device, since the screw-shaped shield 5 is installed in the duct 3, the air is spirally rotated in the space between the duct 3 and the screw blade 7 of the shield 5, while the nuclear facility is being operated. The radioactive substance, etc., flows from the inside to the outside of the space, or vice versa. On the other hand, since the γ-rays go straight, they are attenuated in the process of transmitting or reflecting through the screw blades 7 of the shield 5, and prevent leakage of radiation in the duct 3.
【０００３】[0003]
ところが、上述の従来の放射線漏洩防止装置は、中性子の遮蔽については考慮 していなかった。 However, the above-mentioned conventional radiation leakage prevention device does not consider neutron shielding.
【０００４】 本考案の目的は、各原子力施設において内蔵又は取り扱われる放射性物質に対 応して、全ての放射線を遮蔽することができると共に、全ての放射線の漏洩を確 実に防止することができる放射線漏洩防止装置を提供することにある。The object of the present invention is to prevent radioactive rays from being contained or handled in each nuclear facility, to shield all the radioactive rays, and to prevent leaks of all the radioactive rays. To provide a leakage prevention device.
【０００５】[0005]
本考案は、原子力施設の放射線遮蔽壁に貫通してダクトを設け、そのダクト中 にγ線の直進を妨げかつ気体の流通を妨げないスクリュー形状をなすスクリュー 体を設置し、そのスクリュー体の内部に中空部を設け、そのスクリュー体の中空 部中に、中性子の遮蔽効果が大の物質、γ線の遮蔽効果が大の物質、中性子及び γ線の遮蔽効果が大の物質、のうち何れかの充填材を、充填したことを特徴とす る。 The present invention provides a duct that penetrates through the radiation shielding wall of a nuclear facility, and installs a screw body in the shape of a screw that prevents γ-rays from going straight and does not hinder the flow of gas inside the duct. In the hollow part of the screw body, one of a substance with a large neutron shielding effect, a substance with a large γ-ray shielding effect, or a substance with a large neutron and γ-ray shielding effect is provided. It is characterized in that it is filled with the filler.
【０００６】 また、本考案は、スクリュー体とダクトとを一体構造となしたことを特徴とす る。Further, the present invention is characterized in that the screw body and the duct are integrated.
【０００７】[0007]
本考案は、上記の構成により、各原子力施設において内蔵又は取り扱われる放 射性物質に対応して、中性子の遮蔽効果が大の物質、γ線の遮蔽効果が大の物質 、中性子及びγ線の遮蔽効果が大の物質、のうち何れかの充填材を、スクリュー 体の中空部中に、充填することができる。従って、全ての放射線を遮蔽すること ができると共に、全ての放射線の漏洩を確実に防止することができる。 The present invention is configured as described above, and corresponds to the radioactive substance contained or handled in each nuclear facility, the substance having a large neutron shielding effect, the substance having a large γ-ray shielding effect, the neutron and γ-ray shielding effect. It is possible to fill the hollow portion of the screw body with any one of the fillers having a large shielding effect. Therefore, it is possible to shield all the radiation and surely prevent the leakage of all the radiation.
【０００８】 また、本考案は、スクリュー体とダクトとを一体構造となすことにより、ダク トの内周面とスクリュー体の外側面との間の隙間からの放射線の漏洩を確実に防 ぐことができると共に、現場での原子力施設の施工精度にばら付きが生じても放 射線の漏洩効果が低下するような虞はない。In addition, according to the present invention, by integrally forming the screw body and the duct, it is possible to reliably prevent the leakage of radiation from the gap between the inner peripheral surface of the duct and the outer surface of the screw body. In addition, there is no risk that the radiation leakage effect will deteriorate even if there is a variation in the construction accuracy of the nuclear facilities on site.
【０００９】[0009]
以下、本考案に係る放射線漏洩防止装置の実施例のうちの３例を図１乃至図６ を参照して説明する。 図１は本考案に係る放射線漏洩防止装置の第１の実施例を示した使用状態の一 部断面図である。図２は図１におけるＩＩ−ＩＩ線断面図である。図３はスクリ ュー体の一部斜視図である。図中、図７乃至図９と同符号は同一のものを示す。 図において、１０はダクト３中に設置したスクリュー体である。このスクリュ ー体１０は、γ線の遮蔽効果が大である密度の高い金属、例えばＳＣＳ１３、Ｆ Ｃ等の鋳造品等からなり、しかもγ線の直進を妨げかつ気体の流通を妨げないス クリュー形状をなす。すなわち、このスクリュー体１０は、軸部１２に４条のス クリュー翼１３を９０°ずつの角度で螺旋状に一体に設けると共に、そのスクリ ュー翼１３の内部に中空部１４を設けてなり、長さが前記ダクト３より若干短く 、かつ外径が前記ダクト３の内径とほぼ等しい寸法をなしている。なお、上述の スクリュー体１０の中空部１４は、スクリュー体１０の鋳造段階で形成すること ができる。 図において、１１は前記スクリュー体１０の中空部１４中に充填する充填材で ある。この充填材１１は、中性子の遮蔽効果が大である物質、例えばシリコン系 液状物、又はγ線の遮蔽効果が大である物質、例えばシリコンと鉛の粉末とから なる物、又は中性子やγ線の遮蔽効果が大である物質、例えばシリコン系液状物 とシリコンと鉛の粉末とからなる物であって、各原子力施設において内蔵又は取 り扱われる放射性物質に対応して、中性子の遮蔽効果が大の物質、γ線の遮蔽効 果が大の物質、中性子及びγ線の遮蔽効果が大の物質、のうち何れかの物を、前 記スクリュー体１０の中空部１４中に、充填する。 １５は環状形状をなす遮蔽リングである。この遮蔽リング１５は、中性子の遮 蔽効果が大である物質、例えば純ポリエチレンからなり、外径が前記ダクト３の 内径とほぼ等しい寸法をなしている。この遮蔽リング１５を前記ダクト３中に嵌 合すると共に、前記スクリュー体１０の両端に当接させる。この遮蔽リング１５ は、前記ダクト３の内周面と前記スクリュー体１０の外側面との間の隙間を漏洩 する中性子を遮蔽するものである。 Hereinafter, three examples of embodiments of the radiation leakage prevention apparatus according to the present invention will be described with reference to FIGS. 1 to 6. FIG. 1 is a partial cross-sectional view showing a first embodiment of a radiation leakage prevention apparatus according to the present invention in use. 2 is a sectional view taken along line II-II in FIG. FIG. 3 is a partial perspective view of the screen body. In the figure, the same reference numerals as those in FIGS. 7 to 9 indicate the same components. In the figure, 10 is a screw body installed in the duct 3. The screw body 10 is made of a highly dense metal having a large γ-ray shielding effect, such as a cast product such as SCS13, F C, and the like, and is a screw that does not hinder the straight movement of γ-rays and the flow of gas. Make a shape. That is, in this screw body 10, four screw blades 13 are integrally provided on the shaft portion 12 in a spiral shape at an angle of 90 °, and a hollow portion 14 is provided inside the screw blade 13. The length is slightly shorter than that of the duct 3, and the outer diameter is substantially equal to the inner diameter of the duct 3. The hollow portion 14 of the screw body 10 described above can be formed at the stage of casting the screw body 10. In the figure, 11 is a filler to be filled in the hollow portion 14 of the screw body 10. The filler 11 is a substance having a large neutron shielding effect, for example, a silicon-based liquid, or a substance having a large γ-ray shielding effect, for example, a substance composed of silicon and lead powder, or neutrons or γ-rays. Which has a large shielding effect on the neutrons, such as a silicon-based liquid substance and a powder of silicon and lead. Any one of a large substance, a substance having a large γ-ray shielding effect, and a substance having a large neutron / γ-ray shielding effect is filled in the hollow portion 14 of the screw body 10. Reference numeral 15 is a shield ring having an annular shape. The shield ring 15 is made of a substance having a large neutron shield effect, for example, pure polyethylene, and has an outer diameter substantially equal to the inner diameter of the duct 3. The shield ring 15 is fitted in the duct 3 and is brought into contact with both ends of the screw body 10. The shield ring 15 shields neutrons leaking through the gap between the inner peripheral surface of the duct 3 and the outer surface of the screw body 10.
【００１０】 この実施例における本考案の放射線漏洩防止装置は、以上の如き構成よりなる から、空気はダクト３とスクリュー体１０のスクリュー翼１３との間の空間を螺 旋状に回転しながら、原子力施設の放射線物質等を内蔵又は取り扱う空間の内部 から外部に又はその逆に上述の空間の外部から内部に流通する。一方、γ線は、 直進しょうとするので、スクリュー体１０のスクリュー翼１３の密度の高い金属 からなる部分において、透過又は反射透過する過程で減衰される。 さらに、本考案においては、スクリュー体１０の中空部１４に充填した、シリ コン系液状物の充填材１１により中性子を減速することができ、又はシリコンと 鉛の粉末とからなる物の充填材１１によりγ線を減衰することができ、又はシリ コン系液状物とシリコンと鉛の粉末とからなる物の充填材１１により中性子を減 速することができると共にγ線を減衰することができる。 このように、本考案は、各原子力施設において内蔵又は取り扱われる放射性物 質に対応して、中性子の遮蔽効果が大の物質、γ線の遮蔽効果が大の物質、中性 子及びγ線の遮蔽効果が大の物質、のうち何れかの充填材１１を、スクリュー体 １０の中空部１４中に、充填するので、全ての放射線を遮蔽することができると 共に、全ての放射線の漏洩を確実に防止することができる。Since the radiation leakage prevention apparatus of the present invention in this embodiment has the above-mentioned configuration, air rotates spirally in the space between the duct 3 and the screw blade 13 of the screw body 10, It circulates from the inside to the outside of the space that contains or handles the radioactive materials in nuclear facilities, or vice versa. On the other hand, since the γ-ray tries to go straight, the γ-ray is attenuated in the process of transmission or reflection transmission at the portion of the screw blade 13 of the screw body 10 made of high-density metal. Further, in the present invention, the neutron can be decelerated by the silicon-based liquid filler 11 filled in the hollow portion 14 of the screw body 10, or the filler 11 made of silicon and lead powder. Γ-rays can be attenuated by the above, or the neutrons can be attenuated while the neutrons can be decelerated by the filler 11 made of a silicon-based liquid material, silicon and lead powder. In this way, the present invention is applicable to the radioactive substances built in or handled in each nuclear facility, for substances with a large neutron shielding effect, substances with a large γ-ray shielding effect, neutral substances, and γ-rays. Since any one of the fillers 11 having a large shielding effect is filled in the hollow portion 14 of the screw body 10, all the radiation can be shielded and the leakage of all the radiation can be ensured. Can be prevented.
【００１１】 また、上述の実施例のように、γ線の遮蔽効果が大の物質からなるスクリュー 体１０の中空部１４中に中性子の遮蔽効果が大の物質からなる充填材１１を充填 すれば、中性子の遮蔽装置をスクリュー体１０とは別に設ける必要がなく、大き さ的には従来のスクリュー形状の遮蔽体と全く同じであるので、圧損も、かつ取 付面積も、また手間も従来のものと同じで済むなどの効果がある。Further, as in the above-mentioned embodiment, if the hollow portion 14 of the screw body 10 made of a substance having a large γ-ray shielding effect is filled with the filler 11 made of a substance having a large neutron shielding effect. Since it is not necessary to provide a neutron shielding device separately from the screw body 10, and the size is exactly the same as that of the conventional screw-shaped shield body, pressure loss, installation area, and labor are not required. It has the same effect as the same thing.
【００１２】 なお、上述の実施例において、純ポリエチレンからなる遮蔽リング１５の代り に密度の高い金属からなる遮蔽リングを用いても良いし、また双方の遮蔽リング を併用しても良い。In the above-described embodiment, the shield ring 15 made of high density metal may be used instead of the shield ring 15 made of pure polyethylene, or both shield rings may be used in combination.
【００１３】 図４は本考案に係る放射線漏洩防止装置の第２の実施例を示した使用状態の一 部断面図である。図５は図４におけるＶ−Ｖ線断面図である。図中、図１乃至図 ３及び図７乃至図９と同符号は同一のものを示す。 図において、１０１及び３１は一体構造となしたスクリュー体及びダクト（シ ェル）である。すなわち、この第２の実施例のものは、上述の第１の実施例にお けるスクリュー体１０とダクト３とを一体構造となしたものである。 この第２の実施例のものは、上述の第１の実施例のものと同様の作用効果を達 成することができる。しかも、この第２の実施例のものは、スクリュー体１０１ とダクト３１とを一体構造となしたものであるから、ダクト３中に嵌合すると共 にスクリュー体１０の両端に当接させる遮蔽リング１５が不要となると共に、ダ クト３の内周面とスクリュー体１０の外側面との間の隙間からの放射線の漏洩を 確実に防ぐことができ、しかも現場での原子力施設の施工精度にばら付きが生じ ても放射線の漏洩効果が低下するような虞はない。FIG. 4 is a partial cross-sectional view showing a second embodiment of the radiation leakage prevention apparatus according to the present invention in use. FIG. 5 is a sectional view taken along line VV in FIG. In the figure, the same reference numerals as those in FIGS. 1 to 3 and FIGS. 7 to 9 indicate the same components. In the figure, 101 and 31 are a screw body and a duct (shell) which are integrated. That is, in the second embodiment, the screw body 10 and the duct 3 in the first embodiment described above are integrated. The second embodiment can achieve the same effects as those of the first embodiment described above. Moreover, in the second embodiment, since the screw body 101 and the duct 31 are integrated, a shield ring that is fitted in the duct 3 and is brought into contact with both ends of the screw body 10 is provided. No. 15 is not necessary, radiation leakage from the gap between the inner peripheral surface of the duct 3 and the outer surface of the screw body 10 can be reliably prevented, and the accuracy of the construction of the nuclear facility on site can vary. There is no risk that the radiation leakage effect will be reduced even if there is sticking.
【００１４】 図６は本考案に係る放射線漏洩防止装置の第３の実施例を示した縦断面図であ る。図中、図１乃至図５及び図７乃至図９と同符号は同一のものを示す。 図において、１０２及び３２は一体構造となしたスクリュー体及びダクト（シ ェル）で、このスクリュー体１０２は軸部１２に３条のスクリュー翼１３を１８ ０°ずつの角度で螺旋状に一体に設けたものである。この第３の実施例における スクリュー体１０２及びダクト３２は、上述の第１の実施例及び第２の実施例の スクリュー体１０、１０１及びダクト３、３１と同様の材質からなる。この第３ の実施例のものは、上述の第１の実施例及び第２の実施例のものと同様の作用効 果を達成することができる。FIG. 6 is a longitudinal sectional view showing a third embodiment of the radiation leakage prevention system according to the present invention. In the figure, the same reference numerals as those in FIGS. 1 to 5 and 7 to 9 indicate the same components. In the figure, reference numerals 102 and 32 denote a screw body and a duct (shell) having an integrated structure. The screw body 102 has a shaft portion 12 and three screw blades 13 which are spirally integrated at an angle of 180 °. It was installed in. The screw body 102 and the duct 32 in the third embodiment are made of the same materials as those of the screw bodies 10 and 101 and the ducts 3 and 31 of the above-described first and second embodiments. The third embodiment can achieve the same effects as those of the first and second embodiments described above.
【００１５】 なお、上述の実施例において、スクリュー体１０、１０１、１０２のスクリュ ー翼１３の条数及びピッチは任意であり、一般的には、ダクト３、３１、３２の 口径が大きい程条数が多くなり、またピッチはダクト３、３１、３２の口径と同 等かそれ以下とする。何れにしても、スクリュー体１０、１０１、１０２のスク リュー翼１３（密度の高い金属からなる部分及び充填材１１を含む。）の軸方向 の厚さの合計は、そのスクリュー体１０、１０１、１０２の中性子又はγ線又は 中性子及びγ線の遮蔽能力が放射線遮蔽壁１の遮蔽能力とほぼ同等となるように 、選定される。 また、上述の実施例において、ダクト３、３１、３２及びスクリュー体１０、 １０１、１０２は軸方向に１本で構成されているが、放射線遮蔽壁１の厚さが大 きいため、また取り扱いを容易にするために、ダクト３、３１、３２及びスクリ ュー体１０、１０１、１０２を軸方向に幾つかに分割して製造し、放射線遮蔽壁 １に装備するときに、組み付けるように構成しても良い。 さらに、本考案の放射線漏洩防止装置におけるスクリュー体１０、１０１、１ ０２の形状は、γ線の直進を妨げかつ気体の流通を妨げない形状であれば、上述 の実施例のスクリュー形状に限定されない。 さらにまた、スクリュー体１０、１０１、１０２と充填材１１との物質は、γ 線の遮蔽効果が大の物質と中性子の遮蔽効果が大の物質であれば、上述の実施例 のものに限定されないが、好ましくは軽い水素を多く含んだ液体や純ポリエチレ ン等のパラフィン系物質、あるいはシリコンゴムに耐熱性のある金属酸化物及び ホウ酸化合物を添加したシリコン系液状物である。 また、ダクト３、３１、３２の形状は、原子力施設の給気及び排気が行なわれ れば、特に上述の実施例の円筒形状に限定されない。 さらに、上述の実施例において、スクリュー体１０、１０１、１０２の中空部 １４は、スクリュー翼１３以外に軸部１２中にも設けても良い。In the above-described embodiment, the number and pitch of the screw blades 13 of the screw bodies 10, 101, 102 are arbitrary, and generally, the larger the diameter of the ducts 3, 31, 32, the larger the number of threads. The number is large, and the pitch is equal to or smaller than the diameter of the ducts 3, 31, 32. In any case, the total axial thickness of the screw blades 10 of the screw bodies 10, 101, 102 (including the portion made of dense metal and the filler 11) is the screw body 10, 101, 102. 102 is selected so that the shielding ability of neutrons or γ rays or neutrons and γ rays is substantially equal to the shielding ability of the radiation shielding wall 1. Further, in the above-mentioned embodiment, the ducts 3, 31, 32 and the screw bodies 10, 101, 102 are constituted by one in the axial direction, but since the thickness of the radiation shielding wall 1 is large, the handling is also difficult. For the sake of simplicity, the ducts 3, 31, 32 and the screen bodies 10, 101, 102 are manufactured by being divided into several parts in the axial direction, and are configured to be assembled when mounted on the radiation shielding wall 1. Is also good. Further, the shape of the screw body 10, 101, 102 in the radiation leakage prevention apparatus of the present invention is not limited to the screw shape of the above-mentioned embodiment as long as it does not hinder the straight traveling of γ-rays and the flow of gas. .. Furthermore, the substances of the screw bodies 10, 101, 102 and the filler 11 are not limited to those of the above-mentioned embodiment as long as they have a large γ-ray shielding effect and a neutron shielding effect. However, it is preferably a liquid containing a large amount of light hydrogen, a paraffinic substance such as pure polyethylene, or a silicon-based liquid substance obtained by adding a heat-resistant metal oxide and a boric acid compound to silicon rubber. Further, the shapes of the ducts 3, 31, 32 are not particularly limited to the cylindrical shape of the above-described embodiment as long as air supply and exhaust of the nuclear facility are performed. Further, in the above-described embodiment, the hollow portion 14 of the screw bodies 10, 101, 102 may be provided not only in the screw blade 13 but also in the shaft portion 12.
【００１６】[0016]
以上から明らかなように、本考案の放射線漏洩防止装置は、原子力施設の放射 線遮蔽壁に貫通してダクトを設け、そのダクト中にγ線の直進を妨げかつ気体の 流通を妨げないスクリュー形状をなすスクリュー体を設置し、そのスクリュー体 の内部に中空部を設け、そのスクリュー体の中空部中に、中性子の遮蔽効果が大 の物質、γ線の遮蔽効果が大の物質、中性子及びγ線の遮蔽効果が大の物質、の うち何れかの充填材を、充填するものであるから、各原子力施設において内蔵又 は取り扱われる放射性物質に対応して、中性子の遮蔽効果が大の物質、γ線の遮 蔽効果が大の物質、中性子及びγ線の遮蔽効果が大の物質、のうち何れかの充填 材を、スクリュー体の中空部中に、充填することができる。従って、全ての放射 線を遮蔽することができると共に、全ての放射線の漏洩を確実に防止することが できる。 As is clear from the above, the radiation leakage prevention apparatus of the present invention has a duct that penetrates the radiation shielding wall of a nuclear facility and has a screw shape that does not hinder the direct passage of γ rays and the flow of gas in the duct. The screw body is installed, and a hollow portion is provided inside the screw body.In the hollow portion of the screw body, a substance having a large neutron shielding effect, a substance having a large γ-ray shielding effect, a neutron and γ Of the substances that have a large shielding effect on the rays, one of the filling materials is filled, so a substance that has a large shielding effect on neutrons corresponding to the radioactive substances built in or handled in each nuclear facility, It is possible to fill the hollow portion of the screw body with any one of a filler having a large γ-ray shielding effect and a substance having a large neutron and γ-ray shielding effect. Therefore, it is possible to shield all radiation rays and surely prevent leakage of all radiation rays.
【００１７】 また、本考案は、スクリュー体とダクトとを一体構造となすことにより、ダク トの内周面とスクリュー体の外側面との間の隙間からの放射線の漏洩を確実に防 ぐことができると共に、現場での原子力施設の施工精度にばら付きが生じても放 射線の漏洩効果が低下するような虞はない。Further, according to the present invention, by integrally forming the screw body and the duct, it is possible to reliably prevent the leakage of the radiation from the gap between the inner peripheral surface of the duct and the outer surface of the screw body. In addition, there is no risk that the radiation leakage effect will deteriorate even if there is a variation in the construction accuracy of the nuclear facilities on site.
【００１８】 また、本考案は、スクリュー体とダクトとを一体構造となすことにより、ダク トの内周面とスクリュー体の外側面との間の隙間からの放射線の漏洩を確実に防 ぐことができると共に、現場での原子力施設の施工精度にばら付きが生じても放 射線の漏洩効果が低下するような虞はない。Further, according to the present invention, by integrally forming the screw body and the duct, it is possible to surely prevent the leakage of radiation from the gap between the inner peripheral surface of the duct and the outer surface of the screw body. In addition, there is no risk that the radiation leakage effect will deteriorate even if there is a variation in the construction accuracy of the nuclear facilities on site.
【図１】本考案に係る放射線漏洩防止装置の第１の実施
例を示した使用状態の一部断面図FIG. 1 is a partial cross-sectional view showing a first embodiment of a radiation leakage prevention apparatus according to the present invention in use.
【図２】図１におけるＩＩ−ＩＩ線断面図FIG. 2 is a sectional view taken along line II-II in FIG.
【図３】遮蔽体の一部斜視図FIG. 3 is a partial perspective view of a shield.
【図４】本考案に係る放射線漏洩防止装置の第２の実施
例を示した使用状態の一部断面図FIG. 4 is a partial cross-sectional view of a radiation leakage prevention device according to a second embodiment of the present invention in use, showing a second embodiment.
【図５】図４におけるＶ−Ｖ線断面図5 is a sectional view taken along line VV in FIG.
【図６】本考案に係る放射線漏洩防止装置の第３の実施
例を示した使用状態の縦断面図FIG. 6 is a vertical cross-sectional view of a radiation leakage prevention device according to a third embodiment of the present invention in use showing the third embodiment.
【図７】従来の放射線漏洩防止装置を示した使用状態の
一部断面図FIG. 7 is a partial cross-sectional view of a conventional radiation leakage prevention device in a usage state.
【図８】図７におけるＶＩＩＩ−ＶＩＩＩ線断面図8 is a sectional view taken along line VIII-VIII in FIG.
【図９】遮蔽体の一部斜視図である。FIG. 9 is a partial perspective view of a shield.
１…放射線遮蔽壁、３…ダクト、１０…スクリュー体、
１１…充填材、１２…軸部、１３…スクリュー翼、１４
…中空部、３１…ダクト、１０１…スクリュー体、３２
…ダクト、１０２…スクリュー体。1 ... Radiation shielding wall, 3 ... Duct, 10 ... Screw body,
11 ... Filler material, 12 ... Shaft part, 13 ... Screw blade, 14
... Hollow part, 31 ... Duct, 101 ... Screw body, 32
... duct, 102 ... screw body.
Claims (3)
けたダクトと、そのダクト中に設置し、γ線の直進を妨
げかつ気体の流通を妨げないスクリュー形状をなし、か
つ内部に中空部を設けてなるスクリュー体と、そのスク
リュー体の中空部中に充填した充填材と、を備え、前記
充填材は、中性子の遮蔽効果が大の物質、γ線の遮蔽効
果が大の物質、中性子及びγ線の遮蔽効果が大の物質、
のうち何れかであることを特徴とする原子力施設におけ
る放射線漏洩防止装置。1. A duct that penetrates a radiation shielding wall of a nuclear facility, and a screw that is installed in the duct and has a screw shape that does not hinder the straight traveling of γ rays and does not hinder the flow of gas, and has a hollow portion inside. A screw body provided with, and a filler filled in the hollow portion of the screw body, the filler is a substance having a large neutron shielding effect, a substance having a large γ-ray shielding effect, neutrons And substances that have a large gamma ray shielding effect,
Radiation leakage prevention device in a nuclear facility, which is any one of the above.
効果が大の物質からなることを特徴とする請求項１に記
載の原子力施設における放射線漏洩防止装置。2. The radiation leakage prevention device in a nuclear facility according to claim 1, wherein the screw body and the duct are made of a substance having a large gamma ray shielding effect.
なしたことを特徴とする請求項１又は２に記載の原子力
施設における放射線漏洩防止装置。3. The radiation leakage prevention device in a nuclear facility according to claim 1, wherein the screw body and the duct are integrated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP004669U JPH0562898U (en) | 1991-09-20 | 1992-02-07 | Radiation leakage prevention equipment in nuclear facilities |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7604891 | 1991-09-20 | ||
| JP3-76048 | 1991-09-20 | ||
| JP004669U JPH0562898U (en) | 1991-09-20 | 1992-02-07 | Radiation leakage prevention equipment in nuclear facilities |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0562898U true JPH0562898U (en) | 1993-08-20 |
Family
ID=26338476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP004669U Pending JPH0562898U (en) | 1991-09-20 | 1992-02-07 | Radiation leakage prevention equipment in nuclear facilities |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0562898U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012167979A (en) * | 2011-02-14 | 2012-09-06 | Kawasaki Heavy Ind Ltd | Screw duct guide blade and screw duct |
| JP2020073867A (en) * | 2018-08-21 | 2020-05-14 | エフ イー アイ カンパニＦｅｉ Ｃｏｍｐａｎｙ | X-ray and particle shield for improved vacuum conductivity |
| US20230162942A1 (en) * | 2021-11-23 | 2023-05-25 | Fei Company | Vacuum compatible x-ray shield |
-
1992
- 1992-02-07 JP JP004669U patent/JPH0562898U/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012167979A (en) * | 2011-02-14 | 2012-09-06 | Kawasaki Heavy Ind Ltd | Screw duct guide blade and screw duct |
| JP2020073867A (en) * | 2018-08-21 | 2020-05-14 | エフ イー アイ カンパニＦｅｉ Ｃｏｍｐａｎｙ | X-ray and particle shield for improved vacuum conductivity |
| US20230162942A1 (en) * | 2021-11-23 | 2023-05-25 | Fei Company | Vacuum compatible x-ray shield |
| EP4184527A3 (en) * | 2021-11-23 | 2023-07-26 | FEI Company | Vacuum compatible x-ray shield |
| US11972920B2 (en) | 2021-11-23 | 2024-04-30 | Fei Company | Vacuum compatible X-ray shield |
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