JP4679456B2 - Surface contamination inspection device - Google Patents

Surface contamination inspection device Download PDF

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JP4679456B2
JP4679456B2 JP2006194293A JP2006194293A JP4679456B2 JP 4679456 B2 JP4679456 B2 JP 4679456B2 JP 2006194293 A JP2006194293 A JP 2006194293A JP 2006194293 A JP2006194293 A JP 2006194293A JP 4679456 B2 JP4679456 B2 JP 4679456B2
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cell
filter paper
contamination
surface contamination
outside
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JP2008020400A (en
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佑介 坪井
政司 青木
康幸 若山
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Toshiba Corp
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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

Description

本発明は、再処理関連施設から搬出される放射性廃棄物等の表面汚染を検査する表面汚染検査装置に関する。   The present invention relates to a surface contamination inspection apparatus for inspecting surface contamination such as radioactive waste carried out from a reprocessing related facility.

再処理関連施設から搬出される放射性廃棄物等の表面汚染は、放射性廃棄物等の表面をろ紙にてふき取り、ろ紙に付着した放射能を測定することにより検査される（特許文献１，２参照）。   Surface contamination such as radioactive waste carried out from reprocessing related facilities is inspected by wiping the surface of radioactive waste with filter paper and measuring the radioactivity attached to the filter paper (see Patent Documents 1 and 2). ).

従来、高放射線環境下にある物品の表面汚染を検査するには、クレーン等を用いて別室からろ紙を供給するなど比較的大掛かりな装置に頼らざる得ない状況にある。また、ろ紙を回収する際においては、下階の別室に連通する貫通孔に落下させることにより、下階の検査室に搬送するなどしているが、回収する前にカバーの設置が必要となるため、ろ紙ハンドリング技術という点において複雑な構造にせざる得ない状況にある。
特開昭５７−７９４８０号公報 特開２００１−３０５２８３号公報 Conventionally, in order to inspect the surface contamination of articles in a high radiation environment, it is necessary to rely on a relatively large apparatus such as supplying a filter paper from a separate room using a crane or the like. Also, when collecting the filter paper, it is transported to the inspection room on the lower floor by dropping it into a through hole communicating with a separate room on the lower floor, but it is necessary to install a cover before collecting the filter paper. For this reason, the filter paper handling technology has a complicated structure.
JP-A-57-79480 JP 2001-305283 A

再処理関連施設から搬出される放射性廃棄物は高レベルな放射能を有するものある。このため、放射性廃棄物を取り扱うセル内は高放射線環境となり、人がセル内に入ることはできない上に、廃棄物がセル外に搬出された場合においても、セル内を除染しなければならず、容易に入ることはできない。よって、表面汚染検査を行う上で、その運用性、安全性について考慮する必要がある。
そこで本発明は、運用性が良く安全性の高い表面汚染検査装置を提供することを目的とする。 Radioactive waste transported from reprocessing related facilities has a high level of radioactivity. For this reason, the inside of the cell that handles radioactive waste is in a high radiation environment, and humans cannot enter the cell. In addition, even when waste is carried out of the cell, the inside of the cell must be decontaminated. It cannot enter easily. Therefore, it is necessary to consider the operability and safety when performing surface contamination inspection.
SUMMARY OF THE INVENTION An object of the present invention is to provide a surface contamination inspection apparatus that has good operability and high safety.

上記課題を解決するために、本発明の表面汚染検査装置は、表面汚染を検査すべき被検査物体が収容されているセル内に設けられろ紙によって前記被検査物体の表面汚染を採取する汚染採取装置と、前記セル内に設けられ前記汚染採取装置にろ紙を供給し回収するろ紙供給回収装置と、前記セルの内外を隔離する壁を貫く貫通孔内に設けられろ紙を載置したトレイを運ぶトレイ搬送装置とを有する表面汚染検査装置において、前記トレイ搬送装置は、前記ろ紙供給回収装置から動力伝達を行うことにより、若しくはセル外からの動力により駆動される構成とする。 In order to solve the above-mentioned problems, a surface contamination inspection apparatus according to the present invention is a contamination collection device for collecting surface contamination of an object to be inspected by a filter paper provided in a cell in which the object to be inspected for surface contamination is accommodated. A device, a filter paper supply / recovery device provided in the cell for supplying and collecting filter paper to the contamination collecting device, and a tray on which filter paper is placed in a through-hole penetrating a wall separating the inside and outside of the cell. in surface contamination inspection device having a tray transporting device, the tray transport apparatus by performing power transmission from the filter paper supplying and collecting apparatus, or as a power by the driven Ru configured from outside the cell.

本発明によれば、運用性が良く安全性の高い表面汚染検査装置を提供することができる。   According to the present invention, it is possible to provide a surface contamination inspection apparatus with good operability and high safety.

以下、本発明の実施の形態を図１〜図５を参照して説明する。本実施の形態の表面汚染検査装置は図１および図２に示すように、表面汚染を検査すべき被検査物体１３が隔離収容されているセル内に設けられ被検査物体１３を載置あるいは保持して回転する回転テーブル３と、回転する被検査物体１３の表面にアーム１ａによってろ紙を押し当てて被検査物体１３の表面汚染をろ紙に移行させて採取する汚染採取装置１と、汚染採取装置１にろ紙を供給し回収するろ紙供給回収装置２と、ろ紙を載せたトレイをセル内とセル外を隔てる遮蔽壁１２に設けられた壁貫通孔６を通って移動させるトレイ搬送装置と、セル外に設けられセル内からの放射性物質の侵入を防ぐ密閉式の測定室であるグローブボックス５内に設けられ回収したろ紙の汚染密度を測定する汚染測定装置４とから構成されている。壁貫通孔６のセル内側とセル外側には遮蔽扉７ａ，７ｂが設けられている。   Hereinafter, embodiments of the present invention will be described with reference to FIGS. As shown in FIGS. 1 and 2, the surface contamination inspection apparatus according to the present embodiment is provided in a cell in which an object to be inspected 13 to be inspected for surface contamination is isolated and accommodated, and places or holds the object to be inspected 13. The rotating table 3 rotating, the contamination collecting device 1 for collecting the surface contamination of the inspection object 13 by moving the surface contamination of the inspection object 13 onto the filter paper by pressing the filter paper against the surface of the rotating inspection object 13 by the arm 1a, and the contamination collection device. A filter paper supply and recovery device 2 for supplying and collecting filter paper to 1, a tray transporting device for moving a tray on which the filter paper is placed through a wall through hole 6 provided in a shielding wall 12 separating the inside of the cell from the outside of the cell, and a cell A contamination measuring device 4 is provided inside a glove box 5 which is a sealed measurement chamber which is provided outside and prevents intrusion of radioactive substances from inside the cell, and measures the contamination density of the collected filter paper. Shield doors 7a and 7b are provided inside and outside the cell of the wall through-hole 6.

ろ紙を汚染採取装置１に供給し、汚染採取後ろ紙を回収する動作は下記のように行う。未使用のろ紙はセル外に保管されており、グローブボックス５内に手動にて搬入される。ろ紙がグローブボックス５内に搬入された後は、図３に示すように、専用のトレイ９上にろ紙８が複数個置かれ、セル外側の遮蔽扉７ｂが開けられた後、手動若しくは自動にてトレイ９を壁貫通孔６に入れる。セル外側の遮蔽扉７ｂが閉じられた後、セル内側の遮蔽扉７ａが開かれる。セル内にあるろ紙供給回収装置２は壁貫通孔６内に接近するように移動する。   The operation of supplying the filter paper to the contamination collecting apparatus 1 and collecting the paper after collecting the contamination is performed as follows. Unused filter paper is stored outside the cell and is manually carried into the glove box 5. After the filter paper is carried into the glove box 5, as shown in FIG. 3, a plurality of filter papers 8 are placed on the dedicated tray 9, and the shielding door 7b outside the cell is opened, and then manually or automatically. The tray 9 is put into the wall through hole 6. After the shielding door 7b outside the cell is closed, the shielding door 7a inside the cell is opened. The filter paper supply / recovery device 2 in the cell moves so as to approach the wall through hole 6.

壁貫通孔６内には、図４に示すようにギヤおよびシャフトにて連結されたローラ１０を備えたトレイ搬送装置１４が設置されている。ろ紙供給回収装置２はトレイ搬送装置１４を駆動させる。すなわち、ろ紙供給回収装置２は、トレイ搬送装置１４と動力伝達するための動力伝達継手１１ａを具備しており、また、トレイ搬送装置１４も、ローラ１０に連結されたギヤを回転させるシャフトに結合された動力伝達継手１１ｂを具備している。この継手１１ａ，１１ｂはその位置合わせにずれが生じても動力伝達がなされるような構造となっている。   In the wall through-hole 6, as shown in FIG. 4, a tray transport device 14 having a roller 10 connected by a gear and a shaft is installed. The filter paper supply / recovery device 2 drives the tray transport device 14. That is, the filter paper supply / recovery device 2 includes a power transmission joint 11a for transmitting power to the tray conveyance device 14, and the tray conveyance device 14 is also coupled to a shaft that rotates a gear coupled to the roller 10. The power transmission joint 11b is provided. The joints 11a and 11b are structured such that power can be transmitted even if there is a deviation in the alignment.

ろ紙供給回収装置２は、トレイ９を汚染採取装置１との取り合い点まで搬送し、また、トレイ搬送装置１４との結合点まで移動するための駆動系をもっている。これにより、ろ紙８をセル内に搬入する。搬入されたろ紙８は汚染採取装置１との取り合い点まで搬送され、汚染採取装置１に供給される。汚染採取後のろ紙８の回収は、この逆の動作フローとなる。   The filter paper supply / recovery device 2 has a drive system for transporting the tray 9 to an engagement point with the contamination collecting device 1 and moving to the coupling point with the tray transport device 14. Thereby, the filter paper 8 is carried into the cell. The loaded filter paper 8 is transported to the point of contact with the contamination collecting device 1 and supplied to the contamination collecting device 1. The collection of the filter paper 8 after collecting the contamination is the reverse operation flow.

汚染採取装置１は、アーム１ａ先端に設置した動力を用いて、若しくは機械的にろ紙８を把持し、被検査物体１３の表面にろ紙８を倣わせるように動作する。このとき、被検査物体１３の形状が円筒体の場合には、被検査物体１３を回転テーブル３に載置し回転させながらろ紙８で表面をこする。   The contamination sampling apparatus 1 operates so as to cause the filter paper 8 to follow the surface of the object 13 to be inspected by gripping the filter paper 8 using the power installed at the tip of the arm 1a or mechanically. At this time, when the shape of the inspected object 13 is a cylindrical body, the surface of the inspected object 13 is placed on the rotary table 3 and the surface is rubbed with the filter paper 8 while rotating.

被検査物体１３の表面の汚染を採取したろ紙８は汚染採取装置１から取り外され、トレイ９に載せられてセル外に搬送され、図５に示すように、グローブボックス５内において手動にてトレイ９から降ろされ、汚染測定装置４によって汚染密度を測定される。   The filter paper 8 that collects the contamination of the surface of the object 13 to be inspected is removed from the contamination collecting apparatus 1 and placed on the tray 9 and conveyed outside the cell. As shown in FIG. 9, and the contamination density is measured by the contamination measuring device 4.

上記のように本実施の形態の表面汚染検査装置は、セル内とセル外を連通する壁貫通孔６を通して、セル外からろ紙８を供給し、ろ紙８が汚染採取に使用された後はセル外に搬出して、セル外にて汚染密度を計測する。これにより、大掛かりな装置を設置せずに、セル内にろ紙８を供給し、またセル内からろ紙８を回収する。   As described above, the surface contamination inspection apparatus according to the present embodiment supplies the filter paper 8 from the outside of the cell through the wall through-hole 6 communicating between the inside of the cell and the outside of the cell. Take it out and measure the contamination density outside the cell. Thereby, the filter paper 8 is supplied into the cell and the filter paper 8 is recovered from the cell without installing a large-scale apparatus.

また本実施の形態においては、セル内とセル外を隔てる壁貫通孔６のセル内側及びセル外側それぞれに遮蔽扉７ａ，７ｂを設置する。これにより、セル内の放射線がセル外へ出ることを防止する。また、壁貫通孔６内にトレイ搬送装置１４を設置して、セル内から動力伝達若しくはセル外から動力供給を行うことで、トレイ搬送装置１４を駆動することにより、壁貫通孔６内に動力を持つことなく、ろ紙８を壁貫通孔６を通して内外へ搬送する。またセル内とセル外との間で気密を保持するグローブボックス５若しくはフード内装置を設置してセル外へ放射性物質が漏えいすることを防止し安全性を確保した上で、その内部に設置した汚染測定装置でセル外に搬出したろ紙８の汚染密度を測定する。   In the present embodiment, the shielding doors 7a and 7b are installed on the cell inner side and the cell outer side of the wall through-hole 6 that separates the cell inside and the cell outside, respectively. This prevents radiation inside the cell from going out of the cell. In addition, the tray transport device 14 is installed in the wall through-hole 6, and power is transmitted from the inside of the cell or power is supplied from outside the cell, so that the tray transport device 14 is driven to drive power in the wall through-hole 6. The filter paper 8 is conveyed inward and outward through the wall through-hole 6 without holding. In addition, a glove box 5 or a device in the hood that keeps airtight between the inside of the cell and the outside of the cell is installed to prevent leakage of radioactive materials to the outside of the cell and ensure safety, and then installed inside the cell. The contamination density of the filter paper 8 carried out of the cell is measured by the contamination measuring device.

したがって本実施の形態の表面汚染検査装置によれば、ろ紙供給回収のために大掛かりな装置を設置せずに済み、また、耐放射線性と放射線環境下における運用性が良く、システムとしてのコストダウン及び信頼性を向上させることができる。   Therefore, according to the surface contamination inspection apparatus of the present embodiment, it is not necessary to install a large-scale apparatus for supplying and collecting the filter paper, and the radiation resistance and operability in a radiation environment are good, thereby reducing the cost of the system. And reliability can be improved.

本発明の実施の形態の表面汚染検査装置を示す斜視図。The perspective view which shows the surface contamination test | inspection apparatus of embodiment of this invention. 本発明の実施の形態の表面汚染検査装置のセル内部分を示す斜視図。The perspective view which shows the part in a cell of the surface contamination inspection apparatus of embodiment of this invention. 本発明の実施の形態の表面汚染検査装置に備えられるトレイを示す斜視図。The perspective view which shows the tray with which the surface contamination inspection apparatus of embodiment of this invention is equipped. 本発明の実施の形態の表面汚染検査装置に備えられるトレイ搬送装置とろ紙供給回収装置の動作を示す図。The figure which shows operation | movement of the tray conveyance apparatus with which the surface contamination inspection apparatus of embodiment of this invention is equipped, and a filter paper supply collection | recovery apparatus. 本発明の実施の形態の表面汚染検査装置に備えられるグローブボックスを示す図。The figure which shows the glove box with which the surface contamination test | inspection apparatus of embodiment of this invention is equipped.

符号の説明Explanation of symbols

１…汚染採取装置、１ａ…アーム、２…ろ紙供給回収装置、３…回転テーブル、４…汚染測定装置、５…グローブボックス、６…壁貫通孔、７ａ，７ｂ…遮蔽扉、８…ろ紙、９…トレイ、１０…ローラ、１１ａ，１１ｂ…動力伝達継手、１２…遮蔽壁、１３…被検査物体、１４…トレイ搬送装置。   DESCRIPTION OF SYMBOLS 1 ... Contamination sampling device, 1a ... Arm, 2 ... Filter paper supply collection device, 3 ... Rotary table, 4 ... Contamination measuring device, 5 ... Glove box, 6 ... Wall through-hole, 7a, 7b ... Shielding door, 8 ... Filter paper, DESCRIPTION OF SYMBOLS 9 ... Tray, 10 ... Roller, 11a, 11b ... Power transmission joint, 12 ... Shielding wall, 13 ... Test object, 14 ... Tray conveyance apparatus.

Claims (3)

表面汚染を検査すべき被検査物体が収容されているセル内に設けられろ紙によって前記被検査物体の表面汚染を採取する汚染採取装置と、前記セル内に設けられ前記汚染採取装置にろ紙を供給し回収するろ紙供給回収装置と、前記セルの内外を隔離する壁を貫く貫通孔内に設けられろ紙を載置したトレイを運ぶトレイ搬送装置とを有する表面汚染検査装置において、
前記トレイ搬送装置は、前記ろ紙供給回収装置から動力伝達を行うことにより、若しくはセル外からの動力により駆動されることを特徴とする表面汚染検査装置。 A contamination collecting device for collecting surface contamination of the object to be inspected by a filter paper provided in a cell containing an object to be inspected for surface contamination, and supplying the filter paper to the contamination collecting device provided in the cell In a surface contamination inspection apparatus having a filter paper supply and recovery device for recovery and a tray transport device for transporting a tray on which filter paper is placed provided in a through-hole penetrating a wall separating the inside and outside of the cell ,
The tray transporting device, by performing the power transmission from the filter paper supplying and collecting apparatus, or surface contamination inspection device according to claim Rukoto driven by the power from outside the cell. 前記貫通孔のセル内側およびセル外側に遮蔽用の扉を備えていることを特徴とする請求項１記載の表面汚染検査装置。   The surface contamination inspection apparatus according to claim 1, wherein a shielding door is provided inside and outside the cell of the through hole. 前記貫通孔の前記セル外側に設けられ前記ろ紙の汚染を測定する汚染測定装置を設置した密閉式の測定室を備えていることを特徴とする請求項１記載の表面汚染検査装置。   The surface contamination inspection apparatus according to claim 1, further comprising a hermetically sealed measurement chamber provided with a contamination measurement apparatus that is provided outside the cell of the through-hole and that measures contamination of the filter paper.
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5779480A (en) * 1980-11-05 1982-05-18 Jgc Corp Remote smear device
JPS5796281A (en) * 1980-12-08 1982-06-15 Nippon Atom Ind Group Co Ltd Smear testing device
JPH04242191A (en) * 1991-01-11 1992-08-28 Toshiba Corp Holder type filter paper head
JP2001305283A (en) * 2000-04-20 2001-10-31 Ishikawajima Harima Heavy Ind Co Ltd Leakage inspection device for radioactive waste liquid storage tank

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5779480A (en) * 1980-11-05 1982-05-18 Jgc Corp Remote smear device
JPS5796281A (en) * 1980-12-08 1982-06-15 Nippon Atom Ind Group Co Ltd Smear testing device
JPH04242191A (en) * 1991-01-11 1992-08-28 Toshiba Corp Holder type filter paper head
JP2001305283A (en) * 2000-04-20 2001-10-31 Ishikawajima Harima Heavy Ind Co Ltd Leakage inspection device for radioactive waste liquid storage tank

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