JP3974053B2

JP3974053B2 - Body surface monitor

Info

Publication number: JP3974053B2
Application number: JP2003055779A
Authority: JP
Inventors: 宏隆酒井
Original assignee: Toshiba Corp
Current assignee: Toshiba Corp
Priority date: 2003-03-03
Filing date: 2003-03-03
Publication date: 2007-09-12
Anticipated expiration: 2023-03-03
Also published as: JP2004264204A

Description

【０００１】
【発明の属する技術分野】
本発明は被測定者に付着した放射性物質からの放射線を測定する体表面モニタに関する。
【０００２】
【従来の技術】
従来の体表面モニタは、代表的構成を図２に示すように、被測定者１０をとり囲む形で被測定者１０の前面１０ａの表面放射線量を検出する前面表面汚染検査用放射線検出部１１、被測定者１０の背面１０ｂの表面放射線量を検出する背面表面汚染検査用放射線検出部１２、被測定者１０の右側面１０ｃの表面放射線量を検出する右側面表面汚染検査用放射線検出部（開閉式）１３、被測定者１０の左側面１０ｄの表面放射線量を検出する左側面表面汚染検査用放射線検出部（開閉式）１４、被測定者１０の右手１０ｅの表面放射線量を検出する右手用表面汚染検査用放射線検出部１５、被測定者１０の左手１０ｆの表面放射線量を検出する左手用表面汚染検査用放射線検出部１６、被測定者１０の右足１０ｇの表面放射線量を検出する右足用表面汚染検査用放射線検出部１７および被測定者１０の左足１０ｈの表面放射線量を検出する左足用表面汚染検査用放射線検出部１８が設けられている（下記特許文献１および２参照）。この構成によって、被測定者の各々の部位について一度に表面放射線量の測定を行っていた。
【０００３】
【特許文献１】
特開平５−２３２２３６号公報
【特許文献２】
特開平１０−２０６５５０号公報
【０００４】
【発明が解決しようとする課題】
上記のように従来の体表面モニタは、一度に全汚染部位の測定が可能であるような、出入り口に扉を持つ測定室を有するゲート型である。しかしながら、こうした形では設置場所が限定されると共に、構造や動作機構が複雑になるなどの課題がある。
【０００５】
一方、簡易な汚染検査装置としてハンドフットクロスモニタがある。しかしこのモニタは、手表面と足の裏については比較的ばらつきが少なく評価できるものの、衣服上の汚染評価は被測定者の測定方法により大きな値のばらつきが生じると共に、背面部等の測定の難しい箇所があるという問題がある。
そこで本発明は、簡易な構造及び動作機構を有し、被測定者の測定方法が測定結果に影響することの少ない体表面モニタを提供することを目的とする。
【０００７】
【課題を解決するための手段】
上記課題を解決するために、請求項１の発明は、被測定者の前面および背面に付着した放射性物質からの放射線を測定する前面背面兼用の表面汚染検査用放射線検出部と、前記被測定者の右側面および左側面に付着した放射性物質からの放射線を測定する右側面左側面兼用の表面汚染検査用放射線検出部と、前記被測定者の右手および左手に付着した放射性物質からの放射線を測定する右手左手兼用の表面汚染検査用放射線検出部と、前記被測定者の右足および左足に付着した放射性物質からの放射線を測定する右足左足兼用表面汚染検査用放射線検出部とを備え、前記右手左手兼用の表面汚染検査用放射線検出部は、手の形状を識別する手形状識別センサを備えている構成とする。
請求項２の発明は、被測定者の前面および背面に付着した放射性物質からの放射線を測定する前面背面兼用の表面汚染検査用放射線検出部と、前記被測定者の右側面および左側面に付着した放射性物質からの放射線を測定する右側面左側面兼用の表面汚染検査用放射線検出部と、前記被測定者の右手および左手に付着した放射性物質からの放射線を測定する右手左手兼用の表面汚染検査用放射線検出部と、前記被測定者の右足および左足に付着した放射性物質からの放射線を測定する右足左足兼用表面汚染検査用放射線検出部と前記被測定者の足の形状を識別する足形状識別センサとを備えている構成とする。
【０００８】
請求項３の発明は、前記被測定者の向くべき方向を示す指示灯を備えている構成とする。
請求項４の発明は、前記被測定者の入退場を制限する入退場制限装置を備えている構成とする。
請求項５の発明は、前記被測定者に放射線の汚染があったときに点灯する表示灯を備えている構成とする。
【０００９】
【発明の実施の形態】
以下、図１を参照して本発明の実施の形態を説明する。
本実施の形態の体表面モニタは、被測定者１０の前面１０ａおよび背面１０ｂに付着した放射性物質からの放射線を測定する前面背面兼用の表面汚染検査用放射線検出部１と、被測定者の右側面１０ｃおよび左側面１０ｄに付着した放射性物質からの放射線を測定する右側面左側面兼用の表面汚染検査用放射線検出部２と、被測定者の右手１０ｅおよび左手１０ｆに付着した放射性物質からの放射線を測定する右手左手兼用の表面汚染検査用放射線検出部３と、被測定者の右足１０ｇおよび左足１０ｈに付着した放射性物質からの放射線を測定する右足左足兼用の表面汚染検査用放射線検出部４からなる。
【００１０】
被測定者１０は前面背面兼用の表面汚染検査用放射線検出部１に正対した位置で１回、前面背面兼用の表面汚染検査用放射線検出部１に背を向けた位置で１回の計２回の測定を行う。
【００１１】
本実施の形態の体表面モニタは、被測定者１名あたり２回の測定が必要であるかわりに、検出器台数が少なく簡易な構造となっている。そのため、測定結果が被測定者１０の測定方法によって左右されにくい。
【００１２】
本実施の形態の体表面モニタにおいて、右手左手兼用の表面汚染検査用放射線検出部３に、被測定者１０の手１０ｅ，１０ｆの形状を識別する手形状識別センサ、例えば親指の位置を識別するセンサを設けてもよい。このセンサによって、被測定者１０がどちらを向いているかを確認し、前後二方向での測定が行われることを保証することができる。これによって確実に全身の測定を行うことができる。
【００１３】
また本実施の形態の体表面モニタにおいて、被測定者１０の足部１０ｇ，１０ｈの形状を識別する足形状識別センサ、例えば、靴の先端の太さでつま先か踵かを識別するセンサを設けてもよい。このセンサによって、被測定者１０がどちらを向いているかを確認するし、前後二方向での測定を保証することができる。
【００１４】
また本実施の形態の体表面モニタにおいて、被測定者１０の向くべき方向を示す指示灯５を備えるようにしてもよい。この指示灯５の指示に従うことで、測定に慣れれていない被測定者１０でも、前面と背面の２回の測定を正しく行うことができる。
【００１５】
また本実施の形態の体表面モニタにおいて、被測定者１０が位置すべき場所への出入部に入退場者を制限する装置、例えば遮断バー６を設けるようにしてもよい。被測定者１０が測定区画に入った後、遮断バー６のロックを行い、被測定者１０が所定の測定方向での測定をすべて終了することが確認されるまで、遮断バー６のロックを解除しないことで確実に所定の測定を行うことができる。
【００１６】
また本実施の形態の体表面モニタにおいて、各放射線検出部１，２，３，４に評価対象とする放射線測定部位の数だけ表示灯を設置し、放射線の汚染があった場合、該当箇所の表示灯を点灯させるようにしてもよい。このようにすることで被測定者および管理者に汚染部位を知らせ、その後の除染作業を迅速適確に行うことができる。
【００１７】
さらに本実施の形態の体表面モニタにおいて、各表面汚染検査用放射線検出部１，２，３，４を複数の放射線検出器により構成することで、汚染部位のさらに細かな特定を行うことができる。
【００１８】
【発明の効果】
本発明によれば、簡易な構造及び動作機構を有し、被測定者の測定方法が測定結果に影響することの少ない体表面モニタを提供することができる。
【図面の簡単な説明】
【図１】本発明の実施の形態の体表面モニタの概略平面図。
【図２】従来の体表面モニタの概略平面図。
【符号の説明】
１…前面背面兼用の表面汚染検査用放射線検出部、２…右側面左側面兼用の表面汚染検査用放射線検出部、３…右手左手兼用の表面汚染検査用放射線検出部、４…右足左足兼用の表面汚染検査用放射線検出部、５…指示灯、６…遮断バー、１０…被測定者、１１…前面表面汚染検査用放射線検出部、１２…背面表面汚染検査用放射線検出部、１３…右側面表面汚染検査用放射線検出部（開閉式）、１４…左側面表面汚染検査用放射線検出部（開閉式）、１５…右手用表面汚染検査用放射線検出部、１６…左手用表面汚染検査用放射線検出部、１７…右足用表面汚染検査用放射線検出部、１８…左足用表面汚染検査用放射線検出部。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a body surface monitor that measures radiation from a radioactive substance attached to a measurement subject.
[0002]
[Prior art]
As shown in FIG. 2, a conventional body surface monitor has a front surface contamination inspection radiation detection unit 11 that detects the surface radiation amount of the front surface 10 a of the measurement subject 10 so as to surround the measurement subject 10. The back surface contamination inspection radiation detection unit 12 for detecting the surface radiation dose of the back surface 10b of the measurement subject 10, and the right side surface contamination detection radiation detection unit for detecting the surface radiation dose of the right measurement surface 10c of the measurement subject 10 ( (Open / close type) 13, left side surface contamination inspection radiation detection unit (open / close type) 14 for detecting the surface radiation dose of the left side 10 d of the subject 10, right hand for detecting the surface radiation dose of the right hand 10 e of the subject 10 Radiation detection unit 15 for surface contamination inspection, radiation detection unit 16 for surface contamination inspection for left hand for detecting the left hand 10f of the subject 10 and right foot for detecting the surface radiation dose of the right foot 10g of the subject 10 Left foot surface contamination inspection radiation detecting section 18 which detects the surface radiation of the left foot 10h of surface contamination inspection radiation detection unit 17 and the subject 10 is provided (see Patent Document 1 and 2). With this configuration, the surface radiation dose is measured at once for each part of the measurement subject.
[0003]
[Patent Document 1]
JP-A-5-232236 [Patent Document 2]
Japanese Patent Laid-Open No. 10-206550
[Problems to be solved by the invention]
As described above, the conventional body surface monitor is a gate type having a measurement chamber having a door at an entrance so that all contaminated sites can be measured at once. However, the location is in such a form is limited, there are issues such as the structure and operation mechanism becomes complicated.
[0005]
On the other hand, there is a hand foot cross monitor as a simple contamination inspection apparatus. However, although this monitor can be evaluated with relatively little variation on the surface of the hand and the sole of the foot, the contamination evaluation on clothes causes a large variation in values depending on the measurement method of the person being measured, and it is difficult to measure the back surface etc. There is a problem that there are places.
Accordingly, an object of the present invention is to provide a body surface monitor that has a simple structure and an operation mechanism, and the measurement method of the measurement subject hardly affects the measurement result.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the invention of claim 1 is directed to a radiation detector for surface contamination inspection that also serves as a front and back surface for measuring radiation from a radioactive substance attached to the front and back surfaces of the person to be measured, and the person to be measured. The radiation detector for surface contamination inspection that also serves as the left side of the right side and the radiation from the radioactive material attached to the right and left hands of the subject is measured. A right-hand left hand combined with a radiation detector for surface contamination inspection, and a right-foot left foot combined with a radiation detection unit for measuring radiation from a radioactive substance adhering to the right and left feet of the subject. The dual-purpose radiation detection unit for surface contamination inspection includes a hand shape identification sensor that identifies the shape of the hand.
The invention according to claim 2 is a radiation detector for surface contamination inspection that also serves as a front and back surface for measuring radiation from a radioactive substance attached to the front and back surfaces of the measurement subject, and is attached to the right and left sides of the measurement subject. Radiation detector for surface contamination inspection that also serves as a left-hand side for right side measurement to measure radiation from a radioactive material, and surface contamination inspection for both right-hand and left-hand that measures radiation from a radioactive material adhering to the right and left hands of the subject Radiation detection unit for identifying the shape of the measurement subject's foot and the radiation detection unit for surface contamination inspection for right foot and left foot for measuring radiation from a radioactive substance attached to the measurement subject's right foot and left foot a structure that a sensor.
[0008]
According to a third aspect of the present invention, there is provided an indicator lamp that indicates a direction in which the measurement subject should face.
According to a fourth aspect of the present invention, there is provided an entry / exit restriction device for restricting entry / exit of the subject.
According to a fifth aspect of the present invention, there is provided an indicator lamp that is turned on when the subject is contaminated with radiation.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to FIG.
The body surface monitor according to the present embodiment includes a radiation detector 1 for surface contamination inspection that also serves as a front and back surface for measuring radiation from a radioactive substance attached to the front surface 10a and the back surface 10b of the measurement subject 10, and the right side of the measurement subject. Radiation from the surface contamination inspection radiation detection unit 2 also serving as the right side left side surface for measuring radiation from the radioactive material attached to the surface 10c and the left side surface 10d, and radiation from the radioactive material attached to the right hand 10e and the left hand 10f of the measurement subject From the radiation detection unit 3 for surface contamination inspection that also serves as the right hand and left hand for measuring the radiation, and from the radiation detection unit 4 for surface contamination inspection that also serves as the right foot and the left foot for measuring radiation from a radioactive substance attached to the right foot 10g and the left foot 10h of the measurement subject Become.
[0010]
The person 10 to be measured once at a position facing the radiation detector 1 for surface contamination inspection that also serves as the front and back, and once at a position facing the back to the radiation detector 1 for surface contamination inspection that also serves as the front and back. Take one measurement.
[0011]
The body surface monitor of the present embodiment has a simple structure with a small number of detectors, instead of requiring two measurements per person to be measured. Therefore, the measurement result is not easily influenced by the measurement method of the person to be measured 10.
[0012]
In the body surface monitor of the present embodiment, a hand shape identification sensor for identifying the shape of the hand 10e, 10f of the person to be measured 10, for example, the position of the thumb is identified in the radiation detection unit 3 for surface contamination inspection that also serves as a right hand and a left hand. A sensor may be provided. With this sensor, it is possible to confirm which direction the person to be measured 10 is facing and to ensure that the measurement is performed in two directions. This makes it possible to reliably measure the whole body.
[0013]
In addition, the body surface monitor of the present embodiment is provided with a foot shape identification sensor for identifying the shape of the feet 10g and 10h of the person to be measured 10, for example, a sensor for identifying whether the toe or the heel is based on the thickness of the tip of the shoe. May be. With this sensor, it is possible to confirm which direction the person to be measured 10 is facing and to guarantee measurement in two directions.
[0014]
In addition, the body surface monitor of the present embodiment may include an indicator lamp 5 that indicates the direction in which the person to be measured 10 should face. By following the instructions of the indicator lamp 5, the measurement subject 10 who is not accustomed to the measurement can correctly perform the measurement of the front surface and the back surface twice.
[0015]
In the body surface monitor according to the present embodiment, a device for restricting the entrance / exit, for example, a blocking bar 6 may be provided at the entrance / exit to the place where the person to be measured 10 should be located. After the person to be measured 10 enters the measurement section, the blocking bar 6 is locked, and the blocking bar 6 is unlocked until it is confirmed that the person to be measured 10 finishes all measurements in a predetermined measurement direction. By not doing so, it is possible to reliably perform a predetermined measurement.
[0016]
Further, in the body surface monitor of the present embodiment, the number of radiation measuring parts to be evaluated is set in each radiation detection unit 1, 2, 3, and 4 and if there is radiation contamination, The indicator lamp may be turned on. By doing so, it is possible to notify the measurement subject and the manager of the contaminated site, and to perform subsequent decontamination work quickly and accurately.
[0017]
Furthermore, in the body surface monitor of the present embodiment, each of the surface contamination inspection radiation detection units 1, 2, 3, and 4 is configured by a plurality of radiation detectors, so that the contamination site can be further specified. .
[0018]
【The invention's effect】
According to the present invention, it is possible to provide a body surface monitor that has a simple structure and an operation mechanism, and the measurement method of the measurement subject hardly affects the measurement result.
[Brief description of the drawings]
FIG. 1 is a schematic plan view of a body surface monitor according to an embodiment of the present invention.
FIG. 2 is a schematic plan view of a conventional body surface monitor.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Radiation detection part for surface contamination inspection combined with front back surface 2 ... Radiation detection part for surface contamination inspection combined with right side left side surface 3 ... Radiation detection part for surface contamination inspection combined with right hand left hand 4 ... Radiation detection part for surface contamination inspection, 5 ... Indicator light, 6 ... Shut-off bar, 10 ... Person to be measured, 11 ... Radiation detection part for front surface contamination inspection, 12 ... Radiation detection part for back surface contamination inspection, 13 ... Right side Radiation detector for surface contamination inspection (open / closed), 14 ... Radiation detector for surface contamination inspection (open / close), 15 ... Radiation detector for surface contamination inspection for right hand, 16 ... Radiation detection for surface contamination inspection for left hand Reference numeral 17: Radiation detector for surface contamination inspection for right foot 18: Radiation detector for surface contamination inspection for left foot

Claims

A radiation detector for surface contamination inspection that also serves as a front and rear surface for measuring radiation from radioactive substances attached to the front and back surfaces of the subject, and radiation from radioactive substances attached to the right and left sides of the subject. Radiation detector for surface contamination inspection that also serves as the right side surface and left side surface for measurement, and radiation detector for surface contamination inspection that also serves as a right hand and left hand for measuring radiation from the radioactive material adhering to the right and left hands of the subject, A radiation detection unit for surface contamination inspection that also serves as a right foot and left foot that measures radiation from a radioactive substance adhering to the right foot and left foot of a subject, and the radiation detection unit for surface contamination inspection that also serves as a right hand and left hand has a shape of a hand. body surface monitor you characterized in that it comprises a hand shape identifying sensor which identifies.

A radiation detector for surface contamination inspection that also serves as a front and rear surface for measuring radiation from radioactive substances attached to the front and back surfaces of the subject, and radiation from radioactive substances attached to the right and left sides of the subject. Radiation detector for surface contamination inspection that also serves as the right side surface and left side surface for measurement, and radiation detector for surface contamination inspection that also serves as a right hand and left hand for measuring radiation from the radioactive material adhering to the right and left hands of the subject, It includes a right foot combined surface contamination inspection radiation detector for measuring the radiation from the radioactive material adhering to the right foot and left foot of the subject, and a foot-shaped identification sensor for identifying the shape of the foot of the measured person body surface monitor you wherein a.

Body surface monitor of claim 1 or 2, characterized in that it comprises a signal lamp indicating a direction to face of said measurement subject.

Body surface monitor of claim 1 or 2, characterized in that it comprises entry and exit limiting device for limiting the entrance and exit of the measured person.

Body surface monitor of claim 1 or 2, characterized in that it comprises a display lamp is lit when there is contamination of the radiation to the measured person.