JPH02156186A - Apparatus for measuring accumulated radiation dose - Google Patents

Apparatus for measuring accumulated radiation dose

Info

Publication number
JPH02156186A
JPH02156186A JP63309191A JP30919188A JPH02156186A JP H02156186 A JPH02156186 A JP H02156186A JP 63309191 A JP63309191 A JP 63309191A JP 30919188 A JP30919188 A JP 30919188A JP H02156186 A JPH02156186 A JP H02156186A
Authority
JP
Japan
Prior art keywords
light
optical fiber
fiber cable
radiation dose
measuring
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
Application number
JP63309191A
Other languages
Japanese (ja)
Inventor
Makoto Watanabe
誠 渡辺
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Corp filed Critical Toshiba Corp
Priority to JP63309191A priority Critical patent/JPH02156186A/en
Publication of JPH02156186A publication Critical patent/JPH02156186A/en
Pending legal-status Critical Current

Links

Landscapes

  • Measurement Of Radiation (AREA)

Abstract

PURPOSE:To make it possible to measure the deterioration of the performance of equipment more accurately and to secure the soundness of the equipment at a less cost by measuring the quantity of light transmission loss in an optical fiber cable with a measuring means from the quantity of received light. CONSTITUTION:An optical fiber cable 1 is provided in a radiation environment and used for transmitting light. The light which is supplied from a light emitting means 2 is made to pass through the optical fiber cable 1 and received by a light receiving means 3. The light which is received by the light receiving means 3 is inputted into a measuring means 4. The difference between the quantity of the light supplied from the light emitting means 2 and the quantity of the received light is computed. Thus, the quantity of the light transmission loss in the optical fiber cable 1, i.e. the attenuated quantity of the light, is measured. The accumulated radiation dose in the optical fiber cable 1 is measured from said attenuated quantity of the light, and the measured value is outputted.

Description

【発明の詳細な説明】 [発明の目的] (産業上の利用分野) 本発明は原子力施設等、比較的強い放射線が存(Eする
場所に設置された機器、装置、あるいはかような場所に
持込んで使用する機器、装置に照射される累積放射線−
を簡便に測定し得るようにした累積放射t!it r:
La1l定装置に関する。
[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) The present invention is applicable to equipment and equipment installed in places where relatively strong radiation exists, such as nuclear facilities, or Cumulative radiation irradiated to equipment and devices brought in and used.
Cumulative radiation t! that can be easily measured. it r:
This invention relates to a La1l constant device.

(従来の技術) 放射線の照射によって性能が劣化する性質を持つ機器2
装置(以下では、機器で代表して述べる)を放射線の環
境下で使用する場合、従来では次のような方法で機器の
累積放射線量を評価し、機器の交換あるいは修復を行な
っている。すなわち、予め機器に対して照射試験を実施
し、累積放射線量と機器の性能劣化との関係を把握して
おく。
(Conventional technology) Equipment whose performance deteriorates due to radiation irradiation 2
When a device (hereinafter referred to as device) is used in a radiation environment, conventionally the cumulative radiation dose of the device is evaluated using the following method and the device is replaced or repaired. That is, an irradiation test is conducted on the equipment in advance to understand the relationship between the cumulative radiation dose and the performance deterioration of the equipment.

そして、Ja器を実際の環境下で使用する場合、その環
境における平均的な単位時間当りの放射線;率を設計的
あるいは短時間の測定によって求め、Fs、器の使用期
間から概略の累積放射線量を算出し、これによって機器
の健全性を評価するのが一般的な方法である。しかしな
がら、このような方法では、特にプラントの運転状態に
よって放射線量率が変化する環境の場合、あるいは環境
の異なる場所を移動して用いる場合には、累積放射線量
の評価が困難である。また、累積放射線量を厳密に、!
+定するには、非常に高価な累積放射線量計を装備する
必要がある。しかし、測定すべき範囲が広範囲に4つた
る時には、このような累積放射線量計をZ 備すること
は、現実的には困難である。
When the Ja device is used in an actual environment, the average radiation rate per unit time in that environment is determined by design or by short-term measurement, and Fs is the approximate cumulative radiation dose from the period of use of the device. It is a common method to calculate and evaluate the health of the equipment based on this. However, with such a method, it is difficult to evaluate the cumulative radiation dose, especially in an environment where the radiation dose rate changes depending on the operating state of the plant, or when the device is moved and used in different locations. Also, strictly measure the cumulative radiation dose!
+, it is necessary to equip a very expensive cumulative radiation dosimeter. However, it is practically difficult to equip such a cumulative radiation dosimeter when the measurement range is wide and there are four.

(発明が解決しようとする課題) 以りのように従来では、特定の範囲の累積放射線量を簡
便に411j定することが1しく、測定範囲か広範囲に
わたる場合には特に難しいという問題があった。
(Problem to be solved by the invention) As described above, in the past, it was difficult to simply determine the cumulative radiation dose in a specific range, but it was particularly difficult when the measurement range was wide. .

本発明の目的は、簡便な方法で累積放射線量を、II定
することにより、放射線による機器の性能劣化をより一
層正確に測定し、もって適切な期間での交換あるいは修
復を実施してより少ない費用で機器の健全性を確保する
ことが可能な信頼性の高い累積放射線fa 、01定装
置を提供することにある。
The purpose of the present invention is to more accurately measure the performance deterioration of equipment due to radiation by determining the cumulative radiation dose using a simple method. It is an object of the present invention to provide a highly reliable cumulative radiation fa,01 constant device that can ensure the soundness of equipment at a low cost.

E発明の構成] (課題を解決するための手段) 上記の目的を達成するために本発明では、放射線の累積
線量をAJj定する装置を、放射線環境下に設置4され
、光を伝送するための光ファイバーケーブルと、光ファ
イバーケーブルに光を供給する発光手段と、発光手段か
ら供給されて光フアイバケーブルを通過した光を受光す
る受光手段と、受光手段にて受光した光の量から光ファ
イバーケーブルの光伝送損失の瓜を測定する測定手段と
を備えて構成している。
E Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the present invention provides a device for determining the cumulative dose of radiation, which is installed in a radiation environment and transmits light. an optical fiber cable, a light emitting means for supplying light to the optical fiber cable, a light receiving means for receiving the light supplied from the light emitting means and passed through the optical fiber cable, and a light emitting means for detecting the light of the optical fiber cable from the amount of light received by the light receiving means. and measuring means for measuring the amount of transmission loss.

(作用) 従って、本発明の累積放射線量測定装置においては、発
光手段から供給されて光ファイバーケーブルを通過した
光を受光手段で受光し、この受光した光の量から光ファ
イバーケーブルの光伝送損失の口を測定手段で測定する
ことにより、この光伝送損失の量から光ファイバーケー
ブルに照射された累積放射線量を測定することが可能と
なる。
(Function) Therefore, in the cumulative radiation dose measuring device of the present invention, the light supplied from the light emitting means and passed through the optical fiber cable is received by the light receiving means, and the optical transmission loss of the optical fiber cable is determined from the amount of the received light. By measuring this with a measuring means, it becomes possible to measure the cumulative radiation dose irradiated to the optical fiber cable from the amount of this optical transmission loss.

(実施H) まず、本発明の考え方について述べる。(Implementation H) First, the concept of the present invention will be described.

光ファイバーケーブルは、放射線の照射によりその光伝
送損失が増加する性質をtjlっている。第6図は、光
ファイバーケーブルの放射線による光伝送損失の増加に
関する特性例を示すものである。
Optical fiber cables have the property that their optical transmission loss increases when irradiated with radiation. FIG. 6 shows an example of characteristics regarding an increase in optical transmission loss due to radiation of an optical fiber cable.

この第6図により、107 (rad)以下の累積放射
線量の範囲で光の伝送損失をDJ定でき、かつ損失の増
加と累積放射線量との間にIn関関係が見られる。放射
線に起因する光ファイバーケーブルの光伝送損失の増加
は、光ファイバーケーブルの本来の機能を妨害するもの
であるが、この性質を利用することにより、光ファイバ
ーケーブルに対する累積放射線量を評価することができ
る。
From FIG. 6, the optical transmission loss can be determined by DJ in the range of cumulative radiation dose of 107 (rad) or less, and an In relationship can be seen between the increase in loss and the cumulative radiation dose. The increase in optical transmission loss of optical fiber cables due to radiation interferes with the original function of optical fiber cables, and this property can be used to evaluate the cumulative radiation dose to optical fiber cables.

以下、上記のような考え方に基づく本発明の一実施例に
ついて、図面を参照して詳細に説明する。
Hereinafter, an embodiment of the present invention based on the above concept will be described in detail with reference to the drawings.

第1図は、本発明による累積放射線量測定装置の構成例
を示すブロック図である。本累積放射線量測定装置は第
1図に示すように、光ファイバーケーブルlと、発光手
段2と、受光手段3と、測定手段4とから構成している
FIG. 1 is a block diagram showing an example of the configuration of a cumulative radiation dose measuring device according to the present invention. As shown in FIG. 1, this cumulative radiation dose measuring device is composed of an optical fiber cable 1, a light emitting means 2, a light receiving means 3, and a measuring means 4.

ここで、光ファイバーケーブル1は放射線環境ドに設置
されており、光を伝送するためのものである。また、発
光手段2は、光ファイバーケーブル】に光を供給するも
のである。さらに、3は発光手段2から供給されて光フ
ァイバーケーブル1を通過した光を受光するものである
。さらにまた、測定手段4は、受光手段3にて受光した
光の二から洸ファイバーケーブル1の光伝送損失の量、
すなわち光の減衰量を411定し、かつこの光の減衰量
から先ファイバーケーブル1に照射された累積放射線量
を測定するものである。
Here, the optical fiber cable 1 is installed in a radiation environment and is for transmitting light. Further, the light emitting means 2 is for supplying light to the optical fiber cable. Furthermore, 3 receives the light supplied from the light emitting means 2 and passed through the optical fiber cable 1. Furthermore, the measuring means 4 calculates the amount of optical transmission loss of the optical fiber cable 1 from the light received by the light receiving means 3;
That is, the amount of attenuation of light is determined 411, and the cumulative radiation dose irradiated to the end fiber cable 1 is measured from this amount of attenuation of light.

かかる構成の累積放射線量/l1lj定装置において、
発光手段2から供給された光は、光ファイバーケーブル
1を通過して受光手段3で受光される。そして、この受
光手段3で受光した光は測定手段4に入光され、ここで
発光手段2から供給された光の瓜との差分を算出するこ
とにより、先ファイバ′1−プル1の光伝送損失の2、
すなわち光の減衰量が測定され、さらにこの光の減衰量
を基に光ファイバーケーブル1に照射された累積放射線
量がAP+定されてM]定値が出力される。
In the cumulative radiation dose/l1lj determination device having such a configuration,
Light supplied from the light emitting means 2 passes through the optical fiber cable 1 and is received by the light receiving means 3. The light received by the light receiving means 3 enters the measuring means 4, and by calculating the difference between the light and the light supplied from the light emitting means 2, the optical transmission of the fiber '1-pull 1 is determined. loss 2,
That is, the amount of attenuation of light is measured, and based on the amount of attenuation of light, the cumulative radiation dose irradiated to the optical fiber cable 1 is determined as AP+, and a constant value of M] is output.

上述したように、本実施例の累積放射線量測定装置uで
は、光ファイバーケーブル1を設置するだけの簡便な方
法で、累積放射線量をより一層正確に測定することが可
能となるばかりでなく、#I定範囲が広範囲に4つたっ
ても、光ファイバーケーブル1を設置するだけで容易に
累積放射線量をよりIJ iE &1tに1ilJ+定
することが可能となり、極めて実用性に優れたものであ
る。
As described above, the cumulative radiation dose measurement device u of this embodiment not only enables the cumulative radiation dose to be measured more accurately by simply installing the optical fiber cable 1, but also allows # Even if there are four I constant ranges in a wide range, it is possible to easily determine the cumulative radiation dose to IJ iE &1t by simply installing the optical fiber cable 1, which is extremely practical.

尚、本発明は」1記実施例に限定されるものではなく、
次のようにしても同様に実施できるものである。
It should be noted that the present invention is not limited to the first embodiment,
This can also be implemented in the same way as follows.

(a)第2図は、本累積放射線m測定装置を電気r−プ
ルに適用した場合の実施例構成を示すブロック図である
。第2図において、電気装置(例えば、放射線検出器)
5および電気装置(例えば、制御装置)6の間を電気的
に接続する電気ケーブル7に沿って、累積放射線温測定
装置の光ファイバーケーブル1が配設されている。本例
では、放射線によって絶縁性能が劣化する電気ケーブル
7に対する累積放射線量を簡便に評価することが可能で
ある。
(a) FIG. 2 is a block diagram showing the configuration of an embodiment when this cumulative radiation m measuring device is applied to an electric r-pull. In Figure 2, an electrical device (e.g. radiation detector)
A fiber optic cable 1 of the cumulative radiation temperature measurement device is disposed along an electric cable 7 that electrically connects the device 5 and an electric device (for example, a control device) 6. In this example, it is possible to easily evaluate the cumulative radiation dose to the electric cable 7 whose insulation performance deteriorates due to radiation.

(b)第3図に示すように、腹数本の光ファイバーケー
ブル11,12. ・・・、inに対して一組の発光手
段2.受光手段3.All+ll設定を備え、切替手段
8により切替えて、各々の光ファイバーケーブル11,
12.・・・、Inに対する累積放射線量を測定するよ
うにすることも可能である。
(b) As shown in FIG. 3, several optical fiber cables 11, 12 . . . , a set of light emitting means 2. Light receiving means 3. All+ll settings are provided, and the switching means 8 switches each optical fiber cable 11,
12. ..., it is also possible to measure the cumulative radiation dose to In.

(C)第4図に示すように、光ファイバーケーブル1の
ほぼ全体を、鉛等の遮蔽体9で覆うことにより、光ファ
イバーケーブル1に照射される放射線はを減衰させるこ
とができ、これによってより強い放射線環境下で本累積
放射線量測定装置を適用することが可能となる。
(C) As shown in Fig. 4, by covering almost the entire optical fiber cable 1 with a shielding material 9 made of lead or the like, the radiation irradiated to the optical fiber cable 1 can be attenuated, making it stronger. This cumulative radiation dose measuring device can be applied in a radiation environment.

(d)第5図に示すように、光ファイバーケーブル1の
一部分を残して、鉛等の遮蔽体10で覆うことにより、
特定の場所に対する累積放射線量を評価することが可能
となる。
(d) As shown in FIG. 5, by leaving a part of the optical fiber cable 1 and covering it with a shielding material 10 such as lead,
It becomes possible to evaluate the cumulative radiation dose to a specific location.

〔発明の効果〕〔Effect of the invention〕

以上説明したように本発明によれば、簡便な方法で累積
放射線量を測定できるようにしたので、放射線による機
器の性能劣化をより一層正確にMj定し、もって適切な
期間での交換あるいは修復を実施してより少ない費用で
機器の健全性を確保することが可能な信頼性の高い累積
放射線量測定装置が提(共できる。
As explained above, according to the present invention, cumulative radiation dose can be measured using a simple method, so that performance deterioration of equipment due to radiation can be more accurately determined, and replacement or repair can be carried out within an appropriate period. We can provide a highly reliable cumulative radiation dose measuring device that can perform the following steps and ensure the integrity of the equipment at a lower cost.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明による累積放射線量4pI定装置の一実
施例を示すブロック図、第2図ないし第5図は本発明の
他の実施例をそれぞれ示すブロック図、第6図は本発明
の詳細な説明するための特性図である。 1.11,12.  ・・・、In・・・光ファイバー
ケーブル、2・・・発光手段、3・・・受光手段、4・
・・測定手段、5,6・・・電気装置、7・・・電気ケ
ーブル、8・・・切替手段、9.10・・・遮蔽体。 出願人代理人 弁理士 鈴江武彦 第 図 第 図 第 図 累ネV慄量(rad)
FIG. 1 is a block diagram showing one embodiment of the cumulative radiation dose 4 pI determination device according to the present invention, FIGS. 2 to 5 are block diagrams showing other embodiments of the present invention, and FIG. It is a characteristic diagram for detailed explanation. 1.11,12. ..., In... optical fiber cable, 2... light emitting means, 3... light receiving means, 4.
...Measuring means, 5, 6... Electric device, 7... Electric cable, 8... Switching means, 9.10... Shielding body. Applicant's agent Patent attorney Takehiko Suzue (rad)

Claims (4)

【特許請求の範囲】[Claims] (1)放射線の累積線量を測定する装置において、 放射線環境下に設置され、光を伝送するための光ファイ
バーケーブルと、 前記光ファイバーケーブルに光を供給する発光手段と、 前記発光手段から供給されて光ファイバーケーブルを通
過した光を受光する受光手段と、 前記受光手段にて受光した光の量から光ファイバーケー
ブルの光伝送損失の量を測定する測定手段と、 を備えて成ることを特徴とする累積放射線量測定装置。
(1) A device for measuring the cumulative dose of radiation, which is installed in a radiation environment and includes an optical fiber cable for transmitting light, a light emitting means for supplying light to the optical fiber cable, and an optical fiber supplied from the light emitting means. A cumulative radiation dose characterized by comprising: a light receiving means for receiving light that has passed through the cable; and a measuring means for measuring the amount of optical transmission loss of the optical fiber cable from the amount of light received by the light receiving means. measuring device.
(2)光ファイバーケーブルの光伝送損失の量から、光
ファイバーケーブルに照射された累積放射線量を測定す
る機能を測定手段に持たせるようにしたことを特徴とす
る請求項(1)項記載の累積放射線量測定装置。
(2) The cumulative radiation according to claim (1), characterized in that the measuring means has a function of measuring the cumulative radiation dose irradiated to the optical fiber cable from the amount of optical transmission loss of the optical fiber cable. Quantity measuring device.
(3)光ファイバーケーブルの少なくとも一部を、鉛等
の遮蔽体で覆うようにしたことを特徴とする請求項(1
)項記載の累積放射線量測定装置。
(3) Claim (1) characterized in that at least a part of the optical fiber cable is covered with a shielding material such as lead.
) Cumulative radiation dose measuring device described in section 2.
(4)複数本の光ファイバーケーブルに対して一組の発
光手段、受光手段、測定手段を備え、切替えにより、各
々の光ファイバーケーブルに対する累積放射線量を測定
するようにしたことを特徴とする請求項(1)項記載の
累積放射線量測定装置。
(4) A set of light emitting means, light receiving means, and measuring means is provided for a plurality of optical fiber cables, and the cumulative radiation dose for each optical fiber cable is measured by switching. 1) The cumulative radiation dose measuring device described in section 1).
JP63309191A 1988-12-07 1988-12-07 Apparatus for measuring accumulated radiation dose Pending JPH02156186A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63309191A JPH02156186A (en) 1988-12-07 1988-12-07 Apparatus for measuring accumulated radiation dose

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63309191A JPH02156186A (en) 1988-12-07 1988-12-07 Apparatus for measuring accumulated radiation dose

Publications (1)

Publication Number Publication Date
JPH02156186A true JPH02156186A (en) 1990-06-15

Family

ID=17990025

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63309191A Pending JPH02156186A (en) 1988-12-07 1988-12-07 Apparatus for measuring accumulated radiation dose

Country Status (1)

Country Link
JP (1) JPH02156186A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006017616A (en) * 2004-07-02 2006-01-19 Tokyo Electric Power Co Inc:The Fluid flow measuring instrument, photographic image data processing method, life prediction method for transmission cable, and computer program
WO2018185982A1 (en) * 2017-04-06 2018-10-11 三菱電機株式会社 Radiation measurement device and method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006017616A (en) * 2004-07-02 2006-01-19 Tokyo Electric Power Co Inc:The Fluid flow measuring instrument, photographic image data processing method, life prediction method for transmission cable, and computer program
WO2018185982A1 (en) * 2017-04-06 2018-10-11 三菱電機株式会社 Radiation measurement device and method
US10955565B2 (en) 2017-04-06 2021-03-23 Mitsubishi Electric Corporation Radiation measurement device and method

Similar Documents

Publication Publication Date Title
US5323011A (en) Fiber optic ionizing radiation detector
US5125017A (en) Compton backscatter gage
RU2720638C1 (en) Device for monitoring and diagnostics of high-voltage linear polymer insulators
KR880008481A (en) Method and device for measuring neutron radiation dose
EP0385623B1 (en) Lightguide coating control
JPH02156186A (en) Apparatus for measuring accumulated radiation dose
EP0112079B1 (en) Measuring method and apparatus
US7212694B2 (en) Fiber-optic sensing system for measuring curvature
JPH06294871A (en) Radiation intensity distribution measuring instrument
JP2942727B2 (en) Optical fiber radiation monitor system
US5665972A (en) Method and apparatus for monitoring contamination
JPH01308951A (en) Object inspector by transmitting radiation
JPS59168386A (en) Radiation monitor
JPH0512660B2 (en)
US20030025072A1 (en) Distributed fiberoptic sensors
JP2508169B2 (en) Temperature / radiation detection cable
JPH05296856A (en) Cable for measuring temperature and radiation dose distributions
Lofaro et al. An evaluation of condition monitoring techniques for low-voltage electric cables
JPH0452525A (en) Measuring device of vibration of apparatus for nuclear power plant
JP2600418B2 (en) Optical salt adhesion sensor
GB2127538A (en) X-ray device
Healey et al. A calibration system for X-ray generators and tube factors
Joseph Experimental test of a new method for kVp measurements
Vallario New health physics perspectives affecting instrumentation technology
Eisenhower Calibration of Radiation Sources for Radiography