JPS6333179Y2 - - Google Patents
Info
- Publication number
- JPS6333179Y2 JPS6333179Y2 JP1981126576U JP12657681U JPS6333179Y2 JP S6333179 Y2 JPS6333179 Y2 JP S6333179Y2 JP 1981126576 U JP1981126576 U JP 1981126576U JP 12657681 U JP12657681 U JP 12657681U JP S6333179 Y2 JPS6333179 Y2 JP S6333179Y2
- Authority
- JP
- Japan
- Prior art keywords
- film
- neutron
- converter
- neutrons
- case
- 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.)
- Expired
Links
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 8
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 2
- 229910052709 silver Inorganic materials 0.000 claims description 2
- 239000004332 silver Substances 0.000 claims description 2
- 241000270728 Alligator Species 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000009206 nuclear medicine Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 241000270722 Crocodylidae Species 0.000 description 1
- 206010034972 Photosensitivity reaction Diseases 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- LNNWVNGFPYWNQE-GMIGKAJZSA-N desomorphine Chemical compound C1C2=CC=C(O)C3=C2[C@]24CCN(C)[C@H]1[C@@H]2CCC[C@@H]4O3 LNNWVNGFPYWNQE-GMIGKAJZSA-N 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000009659 non-destructive testing Methods 0.000 description 1
- 230000036211 photosensitivity Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Description
【考案の詳細な説明】
本考案は、原子力施設、機械の非破壊検査、核
医療分野等に従事する中性子取扱い従事者の中性
子被曝量検知のために用いる中性子線フイルムバ
ツジに関するものである。[Detailed Description of the Invention] The present invention relates to a neutron beam film badge used for detecting the neutron exposure dose of neutron handling personnel engaged in nuclear facilities, non-destructive inspection of machines, nuclear medicine fields, etc.
従来、原子力施設、機械の非破壊検査、核医療
分野等において漏洩中性子を検出するには、リチ
ウムや硼素又はその化合物と銀賦活した硫化亜鉛
を均一に分散したポリエチレンで成形した板状物
（以下中性子コンバーターと云う）と感光フイル
ムを併せ用いた検出器によることが多かつた。こ
のような中性子コンバーターと感光フイルムとを
併せ用いた検出器による漏洩中性子の検出は、漏
洩の有無を検出しようとする対象物或は現に発生
している中性子線の強度を測定しようとする対象
物に対して上記の検出器を配置して行なう。そし
て検出された中性子量に応じて発する中性子コン
バーターよりの蛍光による感光フイルムを感光さ
せる。この感光フイルムを現象しその黒化度を測
定して中性子線の強度を求めるようにしていた。 Conventionally, in order to detect leaked neutrons in nuclear facilities, non-destructive testing of machinery, nuclear medicine fields, etc., a plate-shaped material (hereinafter referred to as In many cases, a detector using a combination of a neutron converter (called a neutron converter) and a photosensitive film was used. Detection of leaked neutrons by a detector that uses a combination of a neutron converter and a photosensitive film can be used to detect leaked neutrons from an object for which the presence or absence of leakage is to be detected or for an object for which the intensity of the neutron beam currently being generated is to be measured. This is done by placing the above detector on the The photosensitive film is then exposed to fluorescence from a neutron converter, which is emitted according to the amount of neutrons detected. This photosensitive film was decomposed and its degree of blackening was measured to determine the intensity of the neutron beam.
以上説明した従来の検出器による測定は、現像
したフイルムの黒化度を測定するので非常に感度
の良い中性子線の測定が可能であつた。しかし被
検出対象物に検出器を配置した後、感光フイルム
の中性子コンバーターとの重ね合せを取外し、こ
れを現像するなど時間を要し、又これら作業は細
心の注意をはらつて行なわねばならない。更にこ
れら作業は暗室で行なわねばならない等取扱う場
所が限られるような制約が多い。以上の理由から
おおよその中性子線量を把握するにも数時間以上
の長時間を要し、随時、連続的に検出することが
不可能である。 The measurement using the conventional detector described above measures the degree of blackening of the developed film, so it is possible to measure neutron beams with very high sensitivity. However, after placing the detector on the object to be detected, it takes time to remove the photosensitive film from the neutron converter and develop it, and these operations must be performed with great care. Furthermore, there are many restrictions such as having to perform these operations in a dark room, which limits the space available for handling them. For the above reasons, it takes several hours or more to roughly determine the neutron dose, and it is impossible to detect it continuously at any time.
特に前述のような中性子取扱い従事者の場合、
中性子被曝の程度を瞬時に判定することが放射線
障害を早期に予防するために肝要となる。したが
つて前述のような方法での測定が長時間必要とす
ることはこの種の測定器としては極めて重大な欠
点となる。 Especially in the case of workers handling neutrons as mentioned above,
Instantly determining the degree of neutron exposure is essential for early prevention of radiation damage. Therefore, the fact that measurement using the method described above requires a long time is a very serious drawback for this type of measuring instrument.
本考案は以上の点に鑑みなされたものであつ
て、中性子コンバーターとインスタント写真フイ
ルムとをケース内に密着状態で収納したもので瞬
時に被曝の程度を判定し得るようにした中性子線
フイルムバツジを提供するものである。 The present invention was devised in view of the above points, and provides a neutron film bag in which a neutron converter and an instant photographic film are housed in close contact with each other in a case so that the degree of exposure can be determined instantaneously. It is something to do.
以下図面にもとづき本考案中性子線フイルムバ
ツジの具体的な構成を説明する。図面において１
はアルミケース、２は袋状の黒色遮光紙、３はイ
ンスタント写真フイルム（拡散転写感光材料）、
４は中性子コンバーター、５はわに口クリツプで
ある。このうちアルミケース１は上部にのみ開口
１ａを有する長さ１mm程度の薄板のアルミニウム
よりなるケースで、その前面上部内側には半円柱
状の突起１ｂが形成されている。したがつて感光
したインスタント写真フイルム３をケース１の開
口１ａより上方に引き抜くと、フイルムはこの突
起１ｂと突起に対向するケースの他の側の壁面と
によつてプレスされ薬液が均一かつ十分に順次下
方へ浸透して行つて現像される。又わに口クリツ
プ５は本考案バツヂを作業従事者の胸に取付ける
ためのものである。 The specific structure of the neutron beam film bag according to the present invention will be explained below based on the drawings. 1 in the drawing
is an aluminum case, 2 is a bag-shaped black light-shielding paper, 3 is an instant photographic film (diffusion transfer photosensitive material),
4 is a neutron converter, and 5 is an alligator clip. Among these, the aluminum case 1 is a case made of a thin aluminum plate with a length of about 1 mm and has an opening 1a only in the upper part, and a semi-cylindrical projection 1b is formed inside the upper front surface thereof. Therefore, when the exposed instant photographic film 3 is pulled upward from the opening 1a of the case 1, the film is pressed by the protrusion 1b and the wall surface on the other side of the case opposite to the protrusion, so that the chemical solution is uniformly and sufficiently applied. It penetrates downward one by one and is developed. The alligator clip 5 is used to attach the badge of the present invention to the chest of the worker.
以上のような構成の本考案中性子線フイルムバ
ツジは、わに口クリツプを利用して中性子取扱い
作業者の被服につけて作業を行なう。作業者が作
業中に漏洩中性子線を被曝するとフイルムバツジ
前面より入射した中性子はアルミケース１、黒色
遮光紙２、インスタント写真フイルム３を通して
中性子コンバーター４に当る。ここで中性子コン
バーターは既に従来例の説明で述べた通りの構成
のもので、したがつてコンバーター中のB10或は
Li 6は中性子によつてB10（ｎ，α）反応或はLi 6
（ｎ，α）反応を起し、α線を発する。飛距離の
短いα線はコンバーター内に混入された極く近く
にある銀賦活ZnSに当り、波長4500Åの蛍光を発
し、この蛍光がコンバーター前面のフイルムを感
光させる。作業が終了し中性子取扱い場所より退
去後にフイルムバツジに挿入されている黒色遮光
紙の上部を切りとりその中から感光したフイルム
を所定速度でゆつくりと引き出す。フイルムは取
り出される間にケースに設けられた半円柱状の突
起により圧着されて現像液等の薬液が均一にフイ
ルム面に塗布される。更に所定時間経過後密着し
ているポジプリントをネガフイルムより引き出
し、直ちにポジプリント面保護のためにコロイド
質の被覆液を塗布する。このようにして得られた
ポジプリントの感光度から被曝の程度を判別する
ことができる。 The neutron beam film badge of the present invention constructed as described above is attached to the clothing of a worker handling neutrons using an alligator clip. When a worker is exposed to leaked neutron beams during work, the neutrons incident from the front of the film badge pass through the aluminum case 1, the black light-shielding paper 2, and the instant photographic film 3, and hit the neutron converter 4. Here, the neutron converter has the same configuration as already described in the explanation of the conventional example, so B 10 or
L i 6 undergoes B 10 (n, α) reaction or L i 6 by neutrons.
(n, α) reaction occurs and α rays are emitted. The α-rays, which have a short flight distance, hit the silver-activated ZnS mixed inside the converter and emit fluorescence with a wavelength of 4500 Å, which sensitizes the film on the front of the converter. After completing the work and leaving the neutron handling area, the upper part of the black light-shielding paper inserted in the film badge is cut off and the exposed film is slowly pulled out from inside at a predetermined speed. While the film is being taken out, it is pressed against a semi-cylindrical protrusion provided on the case, and a chemical solution such as a developer is uniformly applied to the film surface. Further, after a predetermined period of time has elapsed, the adhered positive print is pulled out from the negative film, and a colloidal coating liquid is immediately applied to protect the positive print surface. The degree of exposure can be determined from the photosensitivity of the positive print thus obtained.
尚本考案のバツジの大きさは作業者の身につけ
る関係から小型である方が望ましいが、インスタ
ント写真フイルムの大きさ等を考慮すれば名刺大
のものが好適であると考えられる。又アルミケー
スを組立式にすれば、使用後インスタント写真フ
イルム入の遮光紙等を装着することによつて再び
使用することができる。 It is preferable that the badge of the present invention be small in size so that it can be worn by the worker, but considering the size of instant photographic film, etc., a business card-sized badge is considered suitable. Furthermore, if the aluminum case is made into an assembly type, it can be used again by attaching light-shielding paper containing instant photographic film after use.
以上説明したように本考案の中性子線フイルム
バツジによれば中性子取扱い従業者の中性子線被
曝量を即座に正確に検知し得るので放射線障害を
早期に予防し得る。 As explained above, according to the neutron beam film bag of the present invention, the amount of neutron beam exposure of workers handling neutrons can be detected immediately and accurately, so that radiation damage can be prevented at an early stage.
図面は本考案中性子線フイルムバツジの断面図
である。
１……アルミケース、２……遮光紙、３……イ
ンスタント写真フイルム、４……中性子コンバー
ター、５……わに口クリツプ。
The drawing is a cross-sectional view of the neutron beam film bag of the present invention. 1...aluminum case, 2...shading paper, 3...instant photographic film, 4...neutron converter, 5...crocodile clip.
Claims (1)
ケースに互いに密着状態にて収納されたB10又は
Li 6と銀賦活ZoＳとを含む中性子コンバーターお
よびインスタント写真フイルムよりなり、前記ア
ルミケースの上部開口付近に前記フイルムを引き
出しが可能な程度に圧着する半円柱状の突起を有
することを特徴とする中性子線フイルムバツジ。 An aluminum case having a clip and a B 10 or
It consists of a neutron converter containing L i 6 and silver-activated Z o S and an instant photographic film, and is characterized by having a semi-cylindrical protrusion near the upper opening of the aluminum case that presses the film to such an extent that it can be pulled out. Neutron beam film cartridge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12657681U JPS5832479U (en) | 1981-08-28 | 1981-08-28 | neutron film badge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12657681U JPS5832479U (en) | 1981-08-28 | 1981-08-28 | neutron film badge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5832479U JPS5832479U (en) | 1983-03-03 |
| JPS6333179Y2 true JPS6333179Y2 (en) | 1988-09-05 |
Family
ID=29920362
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12657681U Granted JPS5832479U (en) | 1981-08-28 | 1981-08-28 | neutron film badge |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5832479U (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2023137426A (en) | 2022-03-18 | 2023-09-29 | 日本碍子株式会社 | gas sensor |
| JP2023137458A (en) | 2022-03-18 | 2023-09-29 | 日本碍子株式会社 | Gas sensor and density correction method in sensor |
| JP2023141937A (en) | 2022-03-24 | 2023-10-05 | 日本碍子株式会社 | gas sensor |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4988580A (en) * | 1972-11-03 | 1974-08-23 |
-
1981
- 1981-08-28 JP JP12657681U patent/JPS5832479U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4988580A (en) * | 1972-11-03 | 1974-08-23 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5832479U (en) | 1983-03-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5084623A (en) | Radiation dosage indicator | |
| US5051597A (en) | Radiation dosage indicator | |
| US2680816A (en) | Film badge radiation detector | |
| US7489596B2 (en) | Methods and apparatus capable of indicating elapsed time intervals | |
| US2855520A (en) | Radiation detector | |
| US2747103A (en) | Radiation detection devices | |
| Mori et al. | Radioactivity and geometrical distribution measurements of α-emitter specimens with the imaging plate | |
| JPS6333179Y2 (en) | ||
| US3426197A (en) | Dosimeter for measuring neutron and gamma radiation | |
| WO1989000704A1 (en) | Radiation monitoring device | |
| US3911283A (en) | Personnel ionizing radiation dosimeter | |
| US2963581A (en) | Methods and apparatus for detecting radioactive decay | |
| US2558919A (en) | Method for measuring radiation of neutrons | |
| JPS58211682A (en) | Nondestructive measurement device for nuclear substance | |
| US6583425B1 (en) | Dosimetry using silver salts | |
| US3569703A (en) | System for assaying solutions containing alpha-emitting isotopes using track-registration material | |
| US8610087B2 (en) | Method for measuring tritium or other radiation for dismantling | |
| US4808831A (en) | Container for wet and dry radioactive samples | |
| JPH0118376B2 (en) | ||
| Piesch | The Indication of Adsorbed Dose in Critical Organs by Energy Independent Personnel Dosimeters | |
| US2676267A (en) | Identification-film locket | |
| Sorcic | Investigation of Storage-Phosphor Autoradiography for Alpha Emitters on Different Types of Filters | |
| JPS5992375A (en) | Radiation detecting method | |
| JPS6330778A (en) | Liquid scintillation measuring device | |
| HU203212B (en) | Method and apparatus for protecting and identifying prints particularly securities in radio-chemical way |