JPH04184288A - Sampler for monitoring radioactive rays - Google Patents
Sampler for monitoring radioactive raysInfo
- Publication number
- JPH04184288A JPH04184288A JP31451790A JP31451790A JPH04184288A JP H04184288 A JPH04184288 A JP H04184288A JP 31451790 A JP31451790 A JP 31451790A JP 31451790 A JP31451790 A JP 31451790A JP H04184288 A JPH04184288 A JP H04184288A
- Authority
- JP
- Japan
- Prior art keywords
- sample
- vessel
- measured
- radiation
- measurement container
- 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.)
- Granted
Links
- 230000002285 radioactive effect Effects 0.000 title abstract 5
- 238000012544 monitoring process Methods 0.000 title description 9
- 230000005855 radiation Effects 0.000 claims abstract description 47
- 238000005259 measurement Methods 0.000 claims description 42
- 238000007599 discharging Methods 0.000 claims description 2
- 230000007613 environmental effect Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 3
- 239000000941 radioactive substance Substances 0.000 abstract 1
- 230000004043 responsiveness Effects 0.000 abstract 1
- 238000001514 detection method Methods 0.000 description 6
- 230000035945 sensitivity Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 2
- 238000011896 sensitive detection Methods 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
Landscapes
- Measurement Of Radiation (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、測定容器内に導入した被測定試料に含まれ
る放射線を、備え付けの放射線検出器により検出し、測
定監視信号として出力する放射線モニタ用サンプラに関
するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a radiation monitor that detects radiation contained in a sample to be measured introduced into a measurement container using a built-in radiation detector and outputs it as a measurement monitoring signal. This relates to a sampler for use.
第２図は従来の放射線モニタ用サンプラを示す断面図で
あり、図において、ｌは放射線検出器、２はこの放射線
検出器１を収納する検出器保護筒、３は放射線検出器１
を遮へい体内から取り出すときに開放される検出器取出
蓋、４は被測定試料を貯留する測定容器、５は被測定試
料を測定容器４内に導入する入口ノズル、６はこの被測
定試料を排出する出口ノズル、７は測定容器４を囲むよ
うに配置した遮へい体である。FIG. 2 is a cross-sectional view showing a conventional sampler for radiation monitoring.
4 is a measurement container that stores the sample to be measured; 5 is an inlet nozzle that introduces the sample to be measured into the measurement container 4; and 6 is an outlet for discharging the sample to be measured. The outlet nozzle 7 is a shield placed so as to surround the measurement container 4.
次に動作について説明する。Next, the operation will be explained.
まず、入口ノズル５から導入された被測定試料は、測定
容器４に入り一時的に貯留される。この被測定試料に含
まれた放射能から出る放射線は。First, the sample to be measured introduced from the inlet nozzle 5 enters the measurement container 4 and is temporarily stored. What is the radiation emitted from the radioactivity contained in this sample to be measured?
測定容器４の中心部に位置する検出器保護筒２内に置か
れた放射線検出器１に入射し、検知される。The radiation enters the radiation detector 1 placed in the detector protection tube 2 located at the center of the measurement container 4 and is detected.
また、この放射線検出器１から出力される検出信号は、
検出器取出蓋３を貫通するケーブル８を介して図示しな
い信号処理部に送られ、測定監視される。また、検出操
作が終った被測定試料は、出口ノズル６を通じてサンプ
ラ外部に排出される。Moreover, the detection signal output from this radiation detector 1 is
The signal is sent to a signal processing unit (not shown) via a cable 8 that passes through the detector removal lid 3, and is measured and monitored. Further, the sample to be measured after the detection operation is discharged to the outside of the sampler through the outlet nozzle 6.
なお、測定容器４の外周には、鉛などからなる上記遮へ
い体７が設置されているので、サンプラ外部から入射す
る環境放射線を減衰させて、放射線検出器ｌのバックグ
ラウンドを下げ、高感度に被測定試料の放射能を検知で
きるようにしている。Furthermore, since the above-mentioned shielding body 7 made of lead or the like is installed around the outer periphery of the measurement container 4, it attenuates the environmental radiation incident from outside the sampler, lowering the background of the radiation detector l, and increasing the sensitivity. This makes it possible to detect the radioactivity of the sample being measured.
従来の放射線モニタ用サンプラは以上のように構成され
ているので、被測定試料の放射線を高感度に検知する場
合には、測定容器４を大きくすることが必要となるため
、被測定試料の入れ替えに長時間を要し、かつ被測定試
料の放射能濃度の変化に対する応答性が悪くなるなどの
課題があった。Since the conventional sampler for radiation monitoring is configured as described above, in order to detect the radiation of the sample to be measured with high sensitivity, it is necessary to increase the size of the measurement container 4, so it is necessary to replace the sample to be measured. There were problems such as it took a long time to complete the process and the response to changes in the radioactivity concentration of the sample to be measured deteriorated.
また逆に、応答性の早い放射線の測定検知が必要となる
場合には、測定容器４を小形にして、被測定試料の入れ
替え時間を短くしなければならず、この場合には放射線
の検知感度が悪化するなどの課題があった。そして、こ
れらの２つの矛盾から、一般には目的に応じて、サンプ
ラ構造を変えなければならないなどの課題があった。On the other hand, when it is necessary to measure and detect radiation with a quick response, the measurement container 4 must be made small to shorten the time required to replace the sample to be measured, and in this case, the radiation detection sensitivity There were issues such as deterioration of the situation. Due to these two contradictions, there was a problem in that the structure of the sampler generally had to be changed depending on the purpose.
なお、近似技術として実公平１−３４１３８号公報、実
公昭６０−２７９８０号公報に記載されたものがある。In addition, as an approximation technique, there are those described in Japanese Utility Model Publication No. 1-34138 and Japanese Utility Model Publication No. 60-27980.
この発明は上記のような課題を解消するためになされた
もので、高感度で、かつ放射能濃度の変化に対する早い
応答性をもたせながら放射線を迅速に検知できる放射線
モニタ用サンプラを得ることを目的とする。This invention was made to solve the above-mentioned problems, and the purpose is to obtain a sampler for radiation monitoring that can quickly detect radiation while having high sensitivity and quick response to changes in radioactivity concentration. shall be.
この発明に係る放射線モニタ用サンプラは、放射線検出
器を設置した内側測定容器を包むように外側測定装置を
配置して、これに上記内側測定容器から移行した上記被
測定試料を収容したものである。In the radiation monitoring sampler according to the present invention, an outer measuring device is arranged to surround an inner measuring container in which a radiation detector is installed, and the sample to be measured transferred from the inner measuring container is housed therein.
この発明における放射線モニタ用サンプラは、内側測定
容器および外側測定容器の複数の測定容器で構成されて
いるので、上記の小形の内側測定容器内の被測定試料の
放射線検出を早い応答性をもって実施可能にし、外側測
定容器による十分な量の被測定試料の収容によって、放
射線の高感度検知を行えるようにする。The radiation monitoring sampler of the present invention is composed of a plurality of measurement containers, an inner measurement container and an outer measurement container, so that radiation detection of the sample to be measured in the above-mentioned small inner measurement container can be performed with quick response. By accommodating a sufficient amount of the sample to be measured in the outer measurement container, highly sensitive detection of radiation can be performed.
以下、この発明の一実施例を図について説明する。 An embodiment of the present invention will be described below with reference to the drawings.
第１図において、１は放射線検出器、２は放射線検出器
１を収納する検出器保護筒、３は検出器保護筒２内に放
射線検出器１を出し入れするための検出器取出蓋、４ａ
は検出器保護筒２を取り囲む位置に配置した内側測定容
器、４ｂは内側測定容器４ａと同心的にその外側に配置
した外側測定容器、５は内側測定容器４ａの下部に接続
した入口ノズル、６は外側測定容器４ｂの下部に接続し
た出口ノズル、７は内側測定容器４ａおよび外側測定容
器４ｂを囲むように外側測定容器４ｂの外周に配置され
た遮へい体である。In FIG. 1, 1 is a radiation detector, 2 is a detector protection tube that houses the radiation detector 1, 3 is a detector take-out lid for putting the radiation detector 1 in and out of the detector protection tube 2, and 4a
4b is an outer measurement container placed concentrically with and outside of the inner measurement container 4a; 5 is an inlet nozzle connected to the lower part of the inner measurement container 4a; 7 is an outlet nozzle connected to the lower part of the outer measuring container 4b, and 7 is a shielding body arranged around the outer periphery of the outer measuring container 4b so as to surround the inner measuring container 4a and the outer measuring container 4b.
次に動作について説明する。Next, the operation will be explained.
まず、入口ノズル５から導入された被測定試料は、最初
に内側測定容器４ａに底部から流入し、放射線検出器１
に近接した周囲に沿って、上方へ移行し、この内側測定
容器４ａの上部開放端から、外側測定容器４ｂに流入す
る。被測定試料は一時的に外側測定容器４ｂに貯留され
た後、出口ノズル６を経由して流出する。ここで内側測
定容器４ａは強度を保持できる範囲で放射線の減衰効果
を小さくするように、プラスチック、アルミニウム等の
低密度材料で形成する。First, the sample to be measured introduced from the inlet nozzle 5 first flows into the inner measurement container 4a from the bottom, and the radiation detector 1
It passes upwards along the circumference close to the inner measuring container 4a and flows into the outer measuring container 4b from the upper open end of this inner measuring container 4a. The sample to be measured is temporarily stored in the outer measurement container 4b and then flows out through the outlet nozzle 6. Here, the inner measurement container 4a is made of a low-density material such as plastic or aluminum so as to reduce the radiation attenuation effect within a range that maintains its strength.
いま、被測定試料に放射能が含有されている場合には、
まず、内側測定容器４８に試料が流入した時点で、そこ
から出る放射線が放射線検出器１に入射し、検知される
。その後、外側測定容器４ｂに流入した段階で、被測定
試料から放出された放射線は低密度材料で作られた内側
測定容器４ａを透過して、放射線検出器１に入射し、検
知される。検出された信号は、検出器取出蓋３を貫通す
るケーブルにより、信号処理部に送られ、測定監視され
る。また、外側測定容器４ｂの周囲に配置した鉛などに
よる遮へい体７は、外部から入射する放射線を減衰させ
、放射線検出ＩＦｔ１のバックグラウンドを低下させ、
高感度に被測定試料の放射能を検知可能にする。Now, if the sample to be measured contains radioactivity,
First, when a sample flows into the inner measurement container 48, radiation emitted from the sample enters the radiation detector 1 and is detected. Thereafter, at the stage where the radiation enters the outer measurement container 4b, the radiation emitted from the sample to be measured passes through the inner measurement container 4a made of a low-density material, enters the radiation detector 1, and is detected. The detected signal is sent to a signal processing section by a cable passing through the detector extraction lid 3, and is measured and monitored. In addition, the shielding body 7 made of lead or the like placed around the outer measurement container 4b attenuates radiation incident from the outside and reduces the background of the radiation detection IFt1.
Enables highly sensitive detection of radioactivity in a sample to be measured.
つ−まり、小形の内側測定容器内の被測定試料の放射線
検出を、この被測定試料の濃度変化に対して迅速に対応
して実行でき、しかも外側測定容器内の十分な被測定試
料量により、放射線の測定感度を上げることができるこ
とになる。In other words, radiation detection of the sample to be measured in the small inner measurement container can be performed quickly in response to changes in the concentration of the sample to be measured, and moreover, with a sufficient amount of the sample to be measured in the outer measurement container. This means that radiation measurement sensitivity can be increased.
なお、上記実施例では測定容器を内側測定容器４ａおよ
び外側測定容器４ｂの２重構造とし、これらを放射線検
出器１と同心的に配置したものを示したが、測定容器の
構成を３重以上の多重構造としてもよい。In the above embodiment, the measurement container has a double structure of the inner measurement container 4a and the outer measurement container 4b, and these are arranged concentrically with the radiation detector 1. However, the structure of the measurement container may be three or more layers. It is also possible to have a multiple structure.
また、内側測定容器４ａには被測定試料の入れ替えを早
めるための仕切りを設けてもよい。Moreover, a partition may be provided in the inner measurement container 4a to speed up the replacement of the sample to be measured.
以上のように、この発明によれば放射線検出器を設置し
た内側測定容器を包むように外側測定装置を配置して、
これに上記内側測定容器から移行した上記被測定試料を
収容する構成にしたので、試料の放射能濃度の変化に対
し早い応答性が得られ、かつ高感度の放射能測定を実施
できるものが得られる効果がある。As described above, according to the present invention, the outer measuring device is arranged so as to surround the inner measuring container in which the radiation detector is installed,
Since this is configured to accommodate the sample to be measured transferred from the inner measurement container, it is possible to obtain a quick response to changes in the radioactivity concentration of the sample and to perform highly sensitive radioactivity measurements. It has the effect of
第１図はこの発明の一実施例による放射線モニタ用サン
プラを示す断面図、第２図は従来の放射線モニタ用サン
プラを示す断面図である。
１は放射線検出器、４ａは内側測定容器、４ｂは外側測
定容器、５は入口ノズル、６は出口ノズル、７は遮へい
体。
なお、図中、同一符号は同一、または相当部分を示す。FIG. 1 is a sectional view showing a sampler for radiation monitoring according to an embodiment of the present invention, and FIG. 2 is a sectional view showing a conventional sampler for radiation monitoring. 1 is a radiation detector, 4a is an inner measuring container, 4b is an outer measuring container, 5 is an inlet nozzle, 6 is an outlet nozzle, and 7 is a shielding body. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.
Claims (1)
に放射線検出器を設置した内側測定容器と、該内側測定
容器を包むように配置されて、該内側測定容器から移行
した上記被測定試料を収容する外側測定容器と、該外側
測定容器内の被測定試料を排出する出口ノズルと、上記
外側測定容器とともに上記放射線検出器を包み、外部か
らの環境放射線を減衰させる遮へい体とを備えた放射線
モニタ用サンプラ。An inner measurement container connected to an inlet nozzle for introducing a sample to be measured and having a radiation detector installed therein; and an inner measurement container arranged to surround the inner measurement container to accommodate the sample to be measured transferred from the inner measurement container. a radiation monitor comprising: an outer measurement container; an outlet nozzle for discharging a sample to be measured in the outer measurement container; and a shield that encloses the radiation detector together with the outer measurement container and attenuates environmental radiation from the outside. sampler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2314517A JP2534163B2 (en) | 1990-11-20 | 1990-11-20 | Radiation monitor sampler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2314517A JP2534163B2 (en) | 1990-11-20 | 1990-11-20 | Radiation monitor sampler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04184288A true JPH04184288A (en) | 1992-07-01 |
| JP2534163B2 JP2534163B2 (en) | 1996-09-11 |
Family
ID=18054239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2314517A Expired - Fee Related JP2534163B2 (en) | 1990-11-20 | 1990-11-20 | Radiation monitor sampler |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2534163B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011180061A (en) * | 2010-03-03 | 2011-09-15 | Mitsubishi Electric Corp | Radioactive gas monitor |
| JP2016048254A (en) * | 2015-11-19 | 2016-04-07 | 三菱電機株式会社 | Radioactivity measurement method |
| JP2016164501A (en) * | 2015-03-06 | 2016-09-08 | 株式会社環境総合テクノス | Device and method for measuring radiation |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100808893B1 (en) | 2001-05-22 | 2008-03-03 | 유니챰 가부시키가이샤 | Interlabial pads and their packaging |
| JP4230779B2 (en) | 2001-05-22 | 2009-02-25 | ユニ・チャーム株式会社 | Interlabial pad packaging container for individual packaging |
| EP1419753A4 (en) | 2001-05-22 | 2004-10-13 | Uni Charm Corp | Interlabial pad |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5254894A (en) * | 1975-10-29 | 1977-05-04 | Nippon Atom Ind Group Co Ltd | High sensitive monitor for waste water |
| JPS5578969U (en) * | 1978-11-24 | 1980-05-30 |
-
1990
- 1990-11-20 JP JP2314517A patent/JP2534163B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5254894A (en) * | 1975-10-29 | 1977-05-04 | Nippon Atom Ind Group Co Ltd | High sensitive monitor for waste water |
| JPS5578969U (en) * | 1978-11-24 | 1980-05-30 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011180061A (en) * | 2010-03-03 | 2011-09-15 | Mitsubishi Electric Corp | Radioactive gas monitor |
| JP2016164501A (en) * | 2015-03-06 | 2016-09-08 | 株式会社環境総合テクノス | Device and method for measuring radiation |
| JP2016048254A (en) * | 2015-11-19 | 2016-04-07 | 三菱電機株式会社 | Radioactivity measurement method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2534163B2 (en) | 1996-09-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |