JPH01119787A - Radiation detector - Google Patents
Radiation detectorInfo
- Publication number
- JPH01119787A JPH01119787A JP27780987A JP27780987A JPH01119787A JP H01119787 A JPH01119787 A JP H01119787A JP 27780987 A JP27780987 A JP 27780987A JP 27780987 A JP27780987 A JP 27780987A JP H01119787 A JPH01119787 A JP H01119787A
- Authority
- JP
- Japan
- Prior art keywords
- radiation
- measurement chamber
- radiation measurement
- detector
- sampling gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000005855 radiation Effects 0.000 title claims abstract description 88
- 238000005259 measurement Methods 0.000 claims abstract description 46
- 238000005070 sampling Methods 0.000 claims abstract description 18
- 238000001514 detection method Methods 0.000 claims description 10
- 230000005494 condensation Effects 0.000 claims description 8
- 238000009833 condensation Methods 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 6
- 230000007797 corrosion Effects 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 4
- 230000005611 electricity Effects 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は原子力施設等に設置され、放射線を含有する
サンプリングガスな用いて放射線量の測定を行なう放射
線検出装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a radiation detection device installed in a nuclear facility or the like to measure a radiation dose using a sampling gas containing radiation.
第２図は従来の放射線検出装置を示す断面図であり、図
において、１は放射線を含有するサンプリングガスが貯
蔵されているガス容器、２は入口バイブ３を介してガス
容器１に連通ずると共に出口バイブ４が取付けられてい
る放射線測定室、５は放射線測定室２にサンプリングガ
スが導入されたときに、サンプリングガス中の放射線量
を検出する放射線検出器、６は放射線検出器５から発せ
られる電気信号を取り出すためのケーブル、７は放射線
測定室２及び放射線検出器５を外部から遮断するため、
これらの周囲に覆設された鉛容器、８は放射線検出器５
を出し入れするために鉛容器７に設けられた蓋体、９は
ケーブル６を外部へ引き出すためのケーブルガイドであ
る。FIG. 2 is a sectional view showing a conventional radiation detection device. In the figure, 1 is a gas container in which a sampling gas containing radiation is stored, and 2 is a gas container that communicates with the gas container 1 via an inlet vibrator 3. A radiation measurement chamber to which an exit vibrator 4 is attached; 5 a radiation detector that detects the amount of radiation in the sampling gas when the sampling gas is introduced into the radiation measurement chamber 2; 6 a radiation dose emitted from the radiation detector 5; A cable 7 for extracting electrical signals is used to isolate the radiation measurement room 2 and the radiation detector 5 from the outside.
A lead container covered around these, 8 is a radiation detector 5
A lid body 9 is provided on the lead container 7 to take the lead in and out, and a cable guide 9 is used to draw the cable 6 to the outside.
次に動作について説明する。放射線量を測定すべき場所
に放出されたサンプリングガスは、放射線を含有した後
に回収されてガス容器１内に貯蔵される。次いで、サン
プリングガスは入口バイブ３を介して放射線測定室２内
に導入されるが、ここでサンプリングガス中の放射線量
が放射線検出器５により検出され、電気信号がケーブル
６により取り出される。そして、放射線量の検出が終了
した放射線測定室２内のサンプリングガスは、出口バイ
ブ４を通って外部に排出される。Next, the operation will be explained. The sampling gas released to the location where the radiation dose is to be measured is collected after containing radiation and stored in the gas container 1. Next, the sampling gas is introduced into the radiation measurement chamber 2 via the inlet vibrator 3, where the radiation dose in the sampling gas is detected by the radiation detector 5, and an electrical signal is taken out by the cable 6. Then, the sampling gas in the radiation measurement chamber 2 whose radiation dose has been detected is discharged to the outside through the exit vibrator 4.
従来の放射線検出装置は以上のように構成されているの
で、放射線測定室２内に導入されたサンプリングガスの
温度が、放射線測定室２の外部温度より高い場合には、
放射線測定室２の内壁に結露を生じていた。この結露を
放置しておくと、放射線測定室２内に結露水が溜まり、
放射線（特にβ線）が遮蔽されてしまうために、放射線
検出器５が正確な検出を行なうことができなくなり、さ
らに、この結露水により放射線測定室２の内壁が腐食さ
れてしまうなどの問題点があった。Since the conventional radiation detection device is configured as described above, when the temperature of the sampling gas introduced into the radiation measurement chamber 2 is higher than the external temperature of the radiation measurement chamber 2,
Condensation had formed on the inner wall of radiation measurement room 2. If this condensation is left untreated, it will accumulate inside the radiation measurement chamber 2.
Since radiation (especially β rays) is blocked, the radiation detector 5 cannot perform accurate detection, and furthermore, this condensed water corrodes the inner wall of the radiation measurement chamber 2. was there.
この発明は上記のような問題点を解消するためになされ
たもので、放射線測定室２内の結露の発生を防止するこ
とにより、放射線検出器５が正確な放射線量の検出を行
なうことができると共に、放射線測定室２の内壁の腐食
を防止できる放射線検出装置を得ることを目的とする。This invention was made to solve the above problems, and by preventing the occurrence of dew condensation in the radiation measurement chamber 2, the radiation detector 5 can accurately detect the radiation dose. Another object of the present invention is to obtain a radiation detection device that can prevent corrosion of the inner wall of the radiation measurement chamber 2.
この発明に係る放射線検出装置は、加熱装置を、放射線
測定室及び放射線検出器の外周に取付け、サンプリング
ガスが放射線測定室に導入されたときに、この放射線測
定室内の結露の発生を防止するようにしたものである。In the radiation detection device according to the present invention, a heating device is attached to the radiation measurement chamber and the outer periphery of the radiation detector, so that when sampling gas is introduced into the radiation measurement chamber, condensation is prevented from forming inside the radiation measurement chamber. This is what I did.
この発明における加熱装置は、放射線測定室の周囲を均
一に加熱し、放射線測定室の内部と外部との温度差を小
さくする。したがって、サンプリングガスが放射線測定
室に導入されても結露が発生することはない。The heating device according to the present invention uniformly heats the surroundings of the radiation measurement chamber and reduces the temperature difference between the inside and outside of the radiation measurement chamber. Therefore, even if the sampling gas is introduced into the radiation measurement chamber, no condensation will occur.
以下、この発明の一実施例を図について説明する。第１
図において、１０は放射線測定室２及び放射線検出器５
の外周に取付けられた加熱装置、１１は加熱装置１０を
構成するヒータ、１２は断熱材、１３はカバーである。An embodiment of the present invention will be described below with reference to the drawings. 1st
In the figure, 10 is a radiation measurement room 2 and a radiation detector 5.
11 is a heater constituting the heating device 10, 12 is a heat insulating material, and 13 is a cover.
なお、その他の構成要素は第２図のものと同様のため、
その説明を省略する。Note that the other components are the same as those in Figure 2, so
The explanation will be omitted.
次に動作について説明する。ヒータ１１０通電により、
放射線測定室２の周囲が加熱され、また、大きな熱容量
を有する放射線検出器５も加熱されるため、放射線測定
室２の内部と外部とは、はぼ等しい温度に上昇する。Next, the operation will be explained. By energizing the heater 110,
Since the surroundings of the radiation measurement chamber 2 are heated and the radiation detector 5 having a large heat capacity is also heated, the temperature inside and outside of the radiation measurement chamber 2 rises to approximately the same temperature.
この状態で、ガス容器１からサンプリングガスが放射線
測定室２に導入されても、放射線測定室２の内部と外部
との温度差は殆んど変わらないため、放射線測定室２の
内壁に結露が発生することはない。したがって、放射線
検出器５はβ線をはじめとする各種の放射線量の検出を
正確に行なうことができ、さらに、放射線測定室２の内
壁の結露水による腐食を防止することができる。In this state, even if the sampling gas is introduced into the radiation measurement chamber 2 from the gas container 1, the temperature difference between the inside and outside of the radiation measurement chamber 2 will hardly change, so there will be no condensation on the inner wall of the radiation measurement chamber 2. It will never occur. Therefore, the radiation detector 5 can accurately detect various radiation doses including β-rays, and can further prevent corrosion of the inner wall of the radiation measurement chamber 2 due to condensed water.
なお、上記実施例では、ヒータ１１として電気ヒータを
用いた場合を説明したが、電気ヒータの他種々のヒータ
を使用することが可能である。In the above embodiment, an electric heater is used as the heater 11, but it is also possible to use various types of heaters other than the electric heater.
以上のように、この発明によれば、加熱装置を、放射線
測定室及び放射線検出器の外周に取付け、サンプリング
ガスが放射線測定室に導入されたときに、この放射線測
定室内の結露の発生を防止するように構成したので、放
射線検出器が正確な放射線量の検出を行なうことができ
ると共に、放射線測定室の内壁の腐食を防止できるとい
う効果がある。As described above, according to the present invention, the heating device is attached to the outer periphery of the radiation measurement chamber and the radiation detector, and when sampling gas is introduced into the radiation measurement chamber, the generation of condensation inside the radiation measurement chamber is prevented. This configuration has the effect that the radiation detector can accurately detect the radiation dose and that corrosion of the inner wall of the radiation measurement chamber can be prevented.
第１図はこの発明の一実施例による放射線検出装置を示
す断面図、第２図は従来の放射線検出装置を示す断面図
である。
１はガス容器、２は放射線測定室、５は放射線検出器、
７は鉛容器、１０は加熱装置である。
なお、図中、同一符号は同一、又は相当部分を示す。
特許出願人 三菱電機株式会社
代理人弁理士 １）澤 博 昭
（外２名）
第１図FIG. 1 is a sectional view showing a radiation detection device according to an embodiment of the present invention, and FIG. 2 is a sectional view showing a conventional radiation detection device. 1 is a gas container, 2 is a radiation measurement room, 5 is a radiation detector,
7 is a lead container, and 10 is a heating device. In addition, in the figures, the same reference numerals indicate the same or equivalent parts. Patent applicant Patent attorney representing Mitsubishi Electric Corporation 1) Hiroshi Sawa (2 others) Figure 1
Claims (1)
容器に連通する放射線測定室と、前記放射線測定室に前
記サンプリングガスが導入されたときに、該サンプリン
グガス中の放射線量を検出する放射線検出器と、前記放
射線測定室及び前記放射線検出器の周囲に覆設され、該
放射線測定室及び該放射線検出器を外部から遮断する鉛
容器とを備えた放射線検出装置において、前記放射線測
定室及び前記放射線検出器の外周に取付けられ、前記サ
ンプリングガスが前記放射線測定室に導入されたときに
、該放射線測定室内の結露の発生を防止する加熱装置を
有することを特徴とする放射線検出装置。a radiation measurement chamber that communicates with a gas container in which a sampling gas containing radiation is stored; a radiation detector that detects the amount of radiation in the sampling gas when the sampling gas is introduced into the radiation measurement chamber; A radiation detection apparatus comprising a lead container that is placed around the radiation measurement chamber and the radiation detector and shields the radiation measurement chamber and the radiation detector from the outside, the radiation measurement chamber and the radiation detector A radiation detection device comprising a heating device attached to the outer periphery of the radiation measurement chamber to prevent dew condensation from occurring in the radiation measurement chamber when the sampling gas is introduced into the radiation measurement chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27780987A JPH01119787A (en) | 1987-11-02 | 1987-11-02 | Radiation detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27780987A JPH01119787A (en) | 1987-11-02 | 1987-11-02 | Radiation detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01119787A true JPH01119787A (en) | 1989-05-11 |
Family
ID=17588567
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27780987A Pending JPH01119787A (en) | 1987-11-02 | 1987-11-02 | Radiation detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01119787A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009180660A (en) * | 2008-01-31 | 2009-08-13 | Mitsubishi Electric Corp | Radiation monitor |
| JP2010048765A (en) * | 2008-08-25 | 2010-03-04 | Mitsubishi Electric Corp | Iodine sampler |
| JP2016148524A (en) * | 2015-02-10 | 2016-08-18 | 富士電機株式会社 | Radioactivity measurement device |
-
1987
- 1987-11-02 JP JP27780987A patent/JPH01119787A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009180660A (en) * | 2008-01-31 | 2009-08-13 | Mitsubishi Electric Corp | Radiation monitor |
| JP2010048765A (en) * | 2008-08-25 | 2010-03-04 | Mitsubishi Electric Corp | Iodine sampler |
| JP2016148524A (en) * | 2015-02-10 | 2016-08-18 | 富士電機株式会社 | Radioactivity measurement device |
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