JPH0943355A - Radiation measuring device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radiation measuring device which is provided with redundancy and at the same time the redundant elements of which can be effectively utilized at normality and further which can improve the positional resolution and also can extend the distance of extension of the system in the case of being used as a work exposure management system. SOLUTION: This radiation measuring device possesses plural sets of measuring systems, which have plural scintillation detectors 11a and 1b each set of which are arranged corresponding to plural objects 4 of measurement, plural sets of optical fibers 2a and 2b each in loop shape, which connect each set of plural scintillation detectors in order, and a signal processor 3 to which plural sets of optical fibers are connected in a lump, and which detects the optical pulses inputted from these optical fibers and identifies the scintillation detector having sent out that pulse and also measures the radiation. Hereby, even in the case that plural sets of measuring systems or optical fibers have faied, this can continue the measurement of the radiation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention can be applied to a chain-type radiation monitor system as a monitor system for an actual nuclear power plant or the like, and at the same time, can effectively utilize them while providing redundancy. The present invention relates to a radiation measuring apparatus capable of further improving the position resolution and extending the extension distance of the system when used as a work exposure management system.

[0002]

2. Description of the Related Art A radiation monitoring system (radiation measuring device) is a necessary measuring system in nuclear power plants and other nuclear facilities. Especially, the objects most often measured are X-rays and γ-rays. Currently, ionization chambers, scintillation detectors, semiconductor detectors, etc. are used for these measurements.

FIG. 17 shows a connection form of a general monitor detector. Conventional detectors 18 are installed facing the object to be measured 4, and a metal cable 19 for power supply and signal transmission is laid between the detectors 18 and the multiplex transmission device 20. This multiplexing transmission device 20
The information digitized by is converted into light and transmitted to the data processing / display device 12 through the optical fiber 2. Note that, instead of the multiplex transmission device 20, the data processing / display device 12 and the like may be directly connected to the detector 18.

[0004] Nuclear power generation equipment has more severe requirements for reliability and safety than general industries, and such radiation monitoring systems are no exception. However, in the conventional system configuration as shown in FIG. 17, a power supply and an electronic circuit are required at the measurement point, and in addition to the signal cable, the power supply cable and the like are attached,
When it is attempted to provide redundancy, there are cases where the amount of cables increases and the device cost also rises.

For the purpose of simplifying such a radiation monitoring system, a system has been proposed in which a chain connection type as shown in FIG. 18 is possible and an electronic circuit or a power supply device is not required at each measurement point. In this radiation monitoring system, an optical waveguide type scintillation detector is adopted in the sensor section. This optical waveguide type scintillation detector has one or more sets of light entrance / exit, and a transmission optical fiber is connected to each of the light entrance / exit. The light generated in response to the incidence of radiation can be transmitted by the optical fiber connected from both the light extraction ports of each set, and the light incident from the optical fiber side through the one light inlet / outlet is The light is transmitted to the entrance / exit of the light and is further sent out to the optical fiber connected to the entrance / exit of the light.

FIG. 18 shows a radiation monitoring system having this optical waveguide type scintillation detector. In this system, an optical waveguide type scintillation detector 1 is installed so as to face a measurement target 4, these are connected in a chain by optical fibers 2, and both ends of the chain of optical fibers 2 are connected to a signal processing device for multipoint measurement. Connected to 3. Counting (rate) and position information are simultaneously measured by measuring the time difference of arrival of the optical pulse on both sides of the loop.

When this chain-type radiation monitor system is adopted, the cable is only the optical fiber 2, and no electrical parts are required in the vicinity of the object 4 to be measured, and only the optical waveguide type scintillation detector 1 is installed. Therefore, the system cost is expected to decrease.

[0008]

However, in the chained connection, the function of the entire system is lost due to a failure or trouble such as cutting of the optical fiber 2 or loss of the light transmission function of the optical waveguide type scintillation detector 1. There was also the drawback of being told.

Therefore, when this system is applied, the advantage of low cost is utilized to construct a system with redundancy, and, in addition to this, as an effective use of the redundant system, the addition at the normal time is added. Both value and backup function at the time of failure are desired to be compatible.

Further, the chain type radiation monitor system shown in FIG. 18 has a simple sensor section and is inexpensive. Therefore, it is conceivable to additionally install a radiation monitor at a location where a radiation monitor has not been conventionally installed at a nuclear power plant or the like for leak detection or work exposure management.

When such additional installation is performed, the number of points is large in a narrow range as compared with a normal area monitor or the like.
Fine dose (rate) monitoring is required. Also,
Since it is possible to measure in areas that are not normally accessible,
It is expected that the total extension distance to the signal processing device will be considerably long. Therefore, in order to realize such additional installation, it is necessary to improve the time resolution of the above-mentioned optical waveguide type scintillation detector and extend the extension distance.

Since the object of the present invention is to apply the chain type radiation monitor system as a monitor system for an actual nuclear power plant or the like, it is possible to simultaneously utilize them effectively while providing redundancy and to control work exposure. It is an object of the present invention to provide a radiation measuring apparatus capable of further improving the position resolution and extending the extension distance of the system when used as a system.

[0013]

In order to achieve the above-mentioned object, claim 1 has two light extraction ports for emitting light to an optical fiber according to radiation received from a measurement object, and A radiation measuring apparatus comprising a scintillation detector that transmits light incident from an optical fiber through one light outlet to the other light outlet and sends the light from the other light outlet to an optical fiber, A plurality of sets of measurement systems each having a plurality of scintillation detectors, each set corresponding to a plurality of measurement targets, and a plurality of sets of light in a loop shape sequentially connecting the plurality of scintillation detectors of each set Fibers and multiple sets of optical fibers are connected together
A signal processing device for detecting the light pulse input from these optical fibers, identifying the scintillation detector that has sent the light pulse, and measuring the radiation. As a result, even when a plurality of sets of measurement systems or optical fibers fail, the radiation measurement can be continued.

According to a second aspect of the present invention, a plurality of sets of measuring systems each having a plurality of scintillation detectors, each set corresponding to a plurality of measurement targets, and a plurality of scintillation detectors of each set are sequentially provided. A plurality of sets of loop-shaped optical fibers to be connected, and a plurality of sets of optical fibers are separately connected,
A plurality of sets of signal processing devices for measuring the radiation while detecting the light pulse input from these optical fibers and identifying the scintillation detector that has sent the light pulse. There is. Also in this case, the radiation measurement can be continued even if a plurality of sets of measurement systems or optical fibers fail.

According to a third aspect of the present invention, the arrival time difference information extracted from the signal processing device is input, the discriminating device for discriminating each position of each scintillation detector and each position-specific output of this discriminating device are input, and addition processing is performed. And a calculation operation device for performing. Thereby, the substantial counting efficiency in the calculation can be improved.

According to a fourth aspect of the present invention, arrival time difference information extracted from the signal processing device is input, a discriminator for discriminating each position of each scintillation detector and each position-specific output of this discriminator are input, and the averaging process is performed. And a calculation operation device for performing. By this averaging process, substantial statistical accuracy and reliability can be improved.

According to a fifth aspect of the present invention, arrival time difference information extracted from the signal processing device is input, a discriminating device for discriminating each position of each scintillation detector and each position-dependent output of this discriminating device are inputted, and simultaneous counting is performed. And a calculation operation device for performing processing.
By performing this coincidence counting process, it is possible to eliminate accidental counting and suppress the spread of the arrival time difference distribution.

According to a sixth aspect of the present invention, a plurality of sets of measurement systems each having a plurality of scintillation detectors respectively arranged corresponding to a plurality of measurement targets, and one of the scintillation detectors of each set measurement system are interleaved. A plurality of sets of loop-shaped optical fibers connected to the outlet, a light blocking means for blocking the other light extraction outlet of the plurality of scintillation detectors of each set measurement system, and a plurality of sets of optical fibers are connected together. And a detection device for detecting an optical pulse input from these optical fibers. As a result, even if one measurement system fails,
The light intensity is approximately halved, but the measurement can be continued.

According to a seventh aspect of the present invention, a plurality of sets of measurement systems each having a plurality of scintillation detectors arranged corresponding to a plurality of measurement targets, and one of the scintillation detectors of each set measurement system are provided with light collection. A plurality of sets of loop-shaped optical fibers connected to the outlet, a light blocking means for blocking the other light extraction outlet of the plurality of scintillation detectors of each set measurement system, and a plurality of sets of optical fibers are respectively connected,
And a plurality of sets of detectors for detecting light pulses input from these optical fibers. As a result, since the plurality of sets of measurement systems are completely independent, even if one measurement system fails, the measurement can be continued without any influence.

According to the present invention, a plurality of sets of measurement systems each having a plurality of scintillation detectors arranged corresponding to a plurality of measurement targets, and two light collection units of each scintillation detector of each set measurement system. Multiple sets of optical fibers connected to the outlet and multiple sets of optical fibers are connected together, the optical pulses input from these optical fibers are detected, and the scintillation detector that sends the optical pulses is identified. And a signal processing device for measuring radiation. If one measurement system fails, the detection efficiency becomes a single value,
The measurement can be continued.

According to a ninth aspect of the present invention, a plurality of sets of measurement systems each having a plurality of scintillation detectors arranged corresponding to a plurality of measurement targets, and two light collection units of each scintillation detector of each set measurement system. Multiple sets of optical fibers connected to the outlet and multiple sets of optical fibers are connected separately, the optical pulse input from these optical fibers is detected, and the scintillation detector that sent the optical pulse is identified. In addition, a plurality of sets of signal processing devices for measuring radiation are provided. Also in this case, when one measurement system fails, the detection efficiency has a single value, but the measurement can be continued.

According to a tenth aspect of the present invention, the signal processing device is characterized in that the input signal count values corresponding to the plurality of sets of optical pulses from the plurality of sets of scintillation detectors are added and processed. Thereby, the substantial counting efficiency in the calculation can be improved.

In the eleventh aspect, the signal processing device averages the input signal count values when the input signal count values corresponding to the plurality of sets of optical pulses from the plurality of sets of scintillation detectors are within a certain deviation, A feature is that abnormal processing is performed when the input signal count value exceeds a certain deviation. By this averaging process, substantial statistical accuracy and reliability can be improved.

According to a twelfth aspect of the present invention, the signal processing device is characterized in that the input signal count values corresponding to a plurality of sets of optical pulses from a plurality of sets of scintillation detectors are simultaneously counted. By performing this coincidence counting process, it is possible to eliminate accidental counting and suppress the spread of the arrival time difference distribution.

According to a thirteenth aspect of the present invention, there is provided a repeater comprising a detecting means for detecting an optical pulse transmitted through an optical fiber, and a light source for emitting an optical pulse having a high light intensity corresponding to the detected optical pulse. It is characterized by having. As a result, the light pulse from the weakened scintillation detector can be converted into a light pulse having a high light intensity.

According to a fourteenth aspect, another optical fiber for transmitting information received from the signal processing device to the data processing / display device as digital information is provided. As a result, the signal is not attenuated even when the total extension distance to the signal processing device is considerably long.

According to a fifteenth aspect of the present invention, the scintillation detector comprises an inorganic scintillator and an organic scintillator arranged so as to surround the inorganic scintillator, and scintillation material for emitting scintillation light in response to received radiation, and these. It is embedded inside the scintillation material, and both ends are connected to the optical fiber at the light outlets, respectively.
And an optical transmission line including a wavelength shifter. With this dual structure scintillation detector, a large amount of integrated light by the inorganic scintillator is obtained on average, and an optical pulse having a fast decay time component by the organic scintillator is obtained.

According to a sixteenth aspect, the scintillation detector comprises an inorganic scintillator and an organic scintillator arranged so as to surround the inorganic scintillator, and scintillation material for emitting scintillation light in response to received radiation, and these. A transparent medium arranged in optical contact with the scintillation material, and an optical transmission line that is embedded inside the transparent medium and has both ends connected to an optical fiber at each light extraction port and that includes a wavelength shifter. It is characterized by having. In this case also, the scintillation detector having the double structure can obtain a large amount of integrated light by the inorganic scintillator on average and an optical pulse having a fast decay time component by the organic scintillator.

According to a seventeenth aspect, the scintillation detector comprises an inorganic scintillator and an organic scintillator arranged so as to surround the inorganic scintillator, and scintillation material for emitting scintillation light in response to received radiation, and these. Another organic scintillator disposed in optical contact with the scintillation material, and embedded inside the other organic scintillator, both ends of which are connected to an optical fiber at a light extraction port and include a wavelength shifter. And an optical transmission line. In this case also, the scintillation detector having the double structure can obtain a large amount of integrated light by the inorganic scintillator on average and an optical pulse having a fast decay time component by the organic scintillator.

In the eighteenth aspect, the scintillation detector comprises an inorganic scintillator and an organic scintillator which are alternately arranged, and scintillation material for emitting scintillation light in response to received radiation,
The scintillation material is embedded in the inside of the scintillation material, both ends of which are connected to the optical fiber at the light extraction ports, and an optical transmission line including a wavelength shifter is provided. As a result, it is possible to suppress individual volumes and increase the Compton scattering probability.

According to a nineteenth aspect, the scintillation detector comprises an inorganic scintillator and an organic scintillator which are alternately arranged, and scintillation material for emitting scintillation light in response to received radiation, and
A transparent medium disposed in optical contact with the scintillation material, embedded in the transparent medium, both ends are connected to an optical fiber at each light outlet, and an optical transmission line including a wavelength shifter, It is characterized by having. This is effective when increasing the size of the light-concentrating scintillator portion.

According to a twentieth aspect, the scintillation detector comprises an inorganic scintillator and an organic scintillator arranged alternately, and a scintillation material for emitting scintillation light in response to received radiation,
Another organic scintillator disposed in optical contact with the scintillation material, and an optical scintillator embedded in the other organic scintillator, both ends of which are connected to an optical fiber at a light extraction port and which includes a wavelength shifter. And a transmission line. Also in this case, it is effective in increasing the size of the light-concentrating scintillator portion.

[0033]

DETAILED DESCRIPTION OF THE INVENTION A radiation measuring apparatus according to a preferred embodiment of the present invention will be described below with reference to the drawings. (1) Multiplexing I (simple multiplexing) of multipoint measurement system ... Claims
Corresponding to 1 FIG. 1 shows an example in which there are three measurement targets 4. Two optical waveguide type scintillation detectors 1a and 1b of a measurement system of two sets are arranged so as to face each measurement object 4. There is only one multipoint measurement signal processing device 3 using the arrival time difference. The three optical waveguide type scintillation detectors 1a on one side are connected by the optical fiber 2a forming one loop, and the three optical waveguide type scintillation detectors 1b on the other side form the other loop. They are connected by the optical fiber 2b, and the number of loops is two.

Optical fiber 2 forming these two loops
a and 2b are grouped together at one end and are connected to one common multipoint measurement signal processing device 3.

In the first case, the laying lengths of the optical fibers 2a and 2b forming the two loops and the connection interval length of the optical waveguide type scintillation detectors 1a and 1b are configured in the same manner. When the conditions are similarly configured, the data measured by the multipoint measurement signal processing device 3 is as if three optical waveguide type scintillation detectors having doubled detection efficiency are connected. Be recognized by.

In the second case, when the arrival time difference conditions of the optical fibers 2a and 2b forming the two loops are different from each other by the position (time) resolution of the optical waveguide type scintillation detector or more, many cases occur. It is recognized that the data measured by the point measurement signal processing device 3 are connected to the six optical waveguide type scintillation detectors 1a and 1b.

In the former case, even if one of the loops of the optical fibers 2a and 2b becomes unusable, the measurement can be continued with the efficiency being halved.

In the latter case, it is recognized that only three of the six scintillation detectors are connected, and the measurement can be continued.

From the viewpoint of measurement accuracy, the optical waveguide type scintillation detector 1 installed facing the same object 4 to be measured.
It is preferable that a and 1b have equivalent sensitivities and, in addition, have the same geometric efficiency with respect to the measurement target 4. (2) Multiplexing of multipoint measurement system II (separate multiplexing)
Corresponding to Item 2 FIG. 2 shows an example in which there are three measurement targets 4. Two sets of two optical waveguide type scintillation detectors 1a and 1b of a measurement system are arranged facing each measurement object 4. Signal processing device 3 for multipoint measurement using the arrival time difference
Two a and 3b are provided. The three optical waveguide type scintillation detectors 1a on one side are connected by the optical fiber 2a forming one loop, and the three optical waveguide type scintillation detectors 1b on the other side form the other loop. They are connected by the optical fiber 2b, and the number of loops is two.

The optical fiber 2a forming one loop is connected to the multipoint measuring signal processing device 3a at both ends thereof, and the optical fiber 2b forming the other loop is multipoint measuring signal processing device at both ends thereof. It is connected to 3b.

Therefore, the measurement system to which the three optical waveguide type scintillation detectors 1a are connected and the measurement system to which the other three optical waveguide type scintillation detectors 1b are connected are independently arranged in two systems. It is the configured configuration. If one measuring system becomes unavailable, the other measuring system can be operated without any influence.

From the viewpoint of measurement accuracy, the optical waveguide type scintillation detector 1 installed facing the same object 4 to be measured.
It is preferable that a and 1b have the same sensitivity, and are installed so that the geometrical efficiency with respect to the measurement target 4 is also the same. (3) Data processing I (addition processing) when multiplexing ... Claim 3
In the multiplex system described above, when all the measurement systems are operating normally, in all cases in the above-mentioned claim 2, or as the second case in the description in the above-mentioned claim 1, the arrival time difference is If the conditions are different,
As shown in FIG. 5, arrival time difference information that can be extracted from the multipoint measurement signal processing devices 3a and 3b is a-1, 1 for each position of the optical waveguide type scintillation detectors 1a and 1b.
a-2, ... A-n, b-1, b-2 ... B-n are input to the discriminating devices 5a, 5b.

Here, the arrival time difference information (arrival time difference distribution) is obtained from a graph as shown in FIG. FIG.
In the figure, the horizontal axis represents the arrival time difference, and the vertical axis is the histogram showing the frequency of the distribution. The peaks shown in the figure are the optical waveguide type scintillation detectors 1a, 1
It corresponds to the position of b. Therefore, the abscissa can be divided into appropriate sections, and all the data within the section can be treated as the data of the optical waveguide type scintillation detectors 1a and 1b. The discrimination device 5 described above realizes this function.

Positional outputs a- of the discriminator 5
1, a-2, ... A-n, b-1, b-2, ... Bn are input to the calculation operation device 6, and the addition operation is performed in this calculation operation device 6. Thereby, the substantial counting efficiency can be improved. This processing can be applied to both signal measurement and data processing. (4) Data processing II (averaging processing) at the time of multiplexing ...
Corresponding to 4 As in the case described in (3) above, the arrival time difference information is a-1, 1a-2, ... a-n, b-1 for each position of the optical waveguide type scintillation detectors 1a, 1b. , B-2
...... Input to the discriminators 5a and 5b for identifying bn,
Positional outputs a-1, a-2, ... Of the discrimination device 5
.. a-n, b-1, b-2 ... bn are input to the calculation operation device 6, but in this example, the calculation operation device 6 performs the averaging process. Thereby, substantial statistical accuracy and reliability can be improved. Also, this process
It can be applied to both signal measurement and data processing. Further, the averaging is performed when the two data are within a certain deviation, and it is appropriate to add a process such as issuing a warning for investigating the cause when the two signals differ from each other by more than the normal fluctuation. is there. (5) Data processing during multiplexing III (simultaneous counting processing)
Corresponding to claim 5, as in the case described in (3) or (4) above, the arrival time difference information indicates that each optical waveguide type scintillation detector 1a,
A-1, 1a-2, ... a-n, b-for each position of 1b
1, b-2 ... is input to the discriminators 5a and 5b for discriminating bn, and the respective position-dependent outputs a-1 of the discriminator 5 are input.
a-2, ... a-n, b-1, b-2 ... bn are input to the calculation operation device 6, but in this example, the calculation operation device 6 performs simultaneous counting processing. Be seen. This allows
It is possible to eliminate accidental counting and suppress the spread of the arrival time difference distribution. Since this process requires the conditions of simultaneous occurrence, it is easy to perform this process during signal measurement. Regarding this simultaneity, since the optical waveguide type scintillation detectors 1a and 1b are in close contact with each other, they are incident on one of the optical waveguide type scintillation detectors 1a and lose some energy due to Compton scattering, and scattered γ-rays are incident on the other side. This corresponds to the case where the light enters the optical waveguide type scintillation detector 1b. When performed at the time of data processing, it is preferable to store each event independently as data in which the count information has identification information of time information, which is called list mode measurement. (6) Multiplexing for a single measuring point (simple multiplexing with two points at one end)
5 ) Claim 6 FIG. 5 shows an example in which the number of measurement objects 4 is one.
Two sets of two optical waveguide type scintillation detectors 1a and 1b of the measurement system are arranged facing the object to be measured 4. Instead of the arrival time difference, only one optical pulse signal detection device 7a is used, and the optical waveguide type scintillation detector 1 is used.
Optical fibers 2a and 2c (shown by broken lines in FIG. 5) are connected to one of the two light outlets a and 1b, respectively.
The other ends of these optical fibers 2a and 2c are both connected to one signal detection device 7a. This signal detection device 7a
Are connected to the signal processing device 8. In this example, the light guide opening of the optical waveguide type scintillation detectors 1a and 1b which is not connected to the optical fiber is shielded, or a reflecting means is provided at the light takeout opening.

In this example, the optical fibers 2a and 2c to be connected are connected.
2 have almost the same length, the two optical pulses are added and input to the signal detection device 7. Therefore, if one measurement system fails, the measurement in which the light intensity is reduced by about half can be continued. (7) Multiplexing for single measurement point II
Multiplexing) ... Corresponding to claim 7 FIG. 5 shows an example in which there is one measurement target 4.
In this example, two optical pulse signal detection devices 7a and 7b are used instead of the arrival time difference. Optical fibers 2a and 2b (shown by solid lines in FIG. 5) are connected to one of the two light extraction ports of each of the optical waveguide type scintillation detectors 1a and 1b, and two signal detection devices 7a and 7a are separately provided. 7b
Connected to These two signal detection devices 7a and 7b
Are both connected to the signal processing device 8. In this example, the light extraction port of the optical waveguide type scintillation detector 1 to which the optical fiber 2 is not connected is shielded from light or a reflection means is provided at this light extraction port.

In this example, since the two systems are completely independent, the measurement can be continued without any influence even if one system fails. (8) Multiplexing III for a single measurement point (single measurement at both ends
Pure multiplexing): Corresponding to claim 8 FIG. 6 shows an example in which the number of measurement objects 4 is one. Optical waveguide type scintillation detector 1 facing measurement object 4
Two a and 1b are arranged. Of the multipoint measurement signal processing devices 3a and 3b that measure the arrival time difference, only one multipoint measurement signal processing device 3a is used. Two optical fibers 2a and 2c (shown by broken lines in FIG. 6) are connected to the light outlets of the optical waveguide type scintillation detectors 1a and 1b, and the other ends of these optical fibers 2a and 2c are common. It is connected to the measurement signal processing device 3a.

One optical waveguide type scintillation detector 1
The difference in length between the two optical fibers 2a and 2a connected to a is approximately the same as the difference in length between the two optical fibers 2c and 2c connected to the other optical waveguide type scintillation detector 1b. In such a case, the multipoint measurement signal processing device 3a recognizes as if one optical waveguide type scintillation detector 1a is connected, and the effective detection efficiency is increased by the addition.

When one measurement system fails, the detection efficiency has a single value, but the measurement can be continued.

When the difference in length between the two optical fibers 2a and 2c is different for the two optical waveguide type scintillation detectors 1a and 1b, the two optical waveguides are used in the multipoint measurement signal processing device 3a. Type scintillation detectors 1a, 1b
Are recognized as connected.

In this case, when one system fails, the corresponding optical waveguide type scintillation detectors 1a, 1
Although the data of b is not obtained, the measurement can be continued by using the normally operating optical waveguide type scintillation detectors 1a and 1b. (9) Multiplexing for a single measurement point (separate multiplex at both ends
(Corresponding to claim 9) Fig. 6 shows an example in which the number of measurement objects 4 is one.
Two optical waveguide type scintillation detectors 1a and 1b are arranged facing the object to be measured 4. Two multipoint measurement signal processing devices 3a and 3b for measuring the arrival time difference are used. Two optical fibers 2a and 2b (shown by solid lines in FIG. 6) are connected to the light extraction ports of the optical waveguide type scintillation detectors 1a and 1b, and the other ends of these optical fibers 2a and 2b are respectively 2 Signal processing device 3a, 3b for multipoint measurement
It is connected to the.

Since the two measuring systems are completely independent, when one measuring system fails, the detection efficiency becomes a single value, but the measurement can be continued. (10) Data processing at the time of multiplexing for a single measurement point I
(Addition) ... Corresponding to claim 10 In all cases (7) and (9) described above, and in (8) above, the values of the arrival time difference between the two optical waveguide type scintillation detectors 1a and 1b are different. When the optical waveguide type scintillation detectors 1a and 1b are recognized by the multipoint measurement signal processing devices 3a and 3b, as shown in FIGS. 5 and 6, the multipoint measurement signal processing devices 3a and 3b are detected.
Arrival time difference information that can be taken out from is input to the signal processing device 8. In this signal processing device 8, the count value of the two input signals is subjected to addition processing, whereby the substantial counting efficiency can be improved. The processing can be applied to both signal measurement and data processing. (11) Data processing at the time of multiplexing for a single measurement point II
(Average) ... Corresponding to claim 11 In all cases (7) and (9) described above, and in (8) above, the values of the arrival time difference between the two optical waveguide type scintillation detectors 1a and 1b are different. When the optical waveguide type scintillation detectors 1a and 1b are recognized by the multipoint measurement signal processing devices 3a and 3b, as shown in FIGS. 5 and 6, the multipoint measurement signal processing devices 3a and 3b are detected.
Arrival time difference information that can be taken out from is input to the signal processing device 8. In this signal processing device 8, it is possible to substantially improve the counting efficiency by averaging the count values of the two input signals. The processing can be applied to both signal measurement and data processing.

Further, the averaging is performed when the two data are within a certain deviation, and when the two signals differ from each other by more than the normal fluctuation, a process such as issuing a warning for investigating the cause is added. Is appropriate. (12) Data processing at the time of multiplexing for a single measurement point II
I (simultaneous) ... Corresponding to claim 12 In all cases (7) and (9) described above, and in (8) above, the value of the arrival time difference between the two optical waveguide type scintillation detectors 1a and 1b is Differently, when the multi-point measurement signal processing devices 3a and 3b recognize the two optical waveguide type scintillation detectors 1a and 1b, as shown in FIGS. 5 and 6, the multi-point measurement signal processing device 3a, 3b
Arrival time difference information that can be taken out from is input to the signal processing device 8. In this signal processing device 8, the count of two input signals is simultaneously counted, so that the random count and the spread of the distribution in the arrival time difference distribution can be suppressed. This process is easy to perform at the time of signal measurement because a condition of simultaneous occurrence is required. When performed during data processing, it is called list mode measurement, and it is preferable to store each event independently as data in which count information has identification information of time information. (13) Distance extension method I (analog type) ... Paired with claim 13
As shown in response Figure 7, a plurality of optical waveguide type scintillation detector 1 is connected to a chain shape by an optical fiber 2, the chain ends of the optical fiber 2, the two repeaters 11 are connected There is. Each repeater 11 is sent out from the optical waveguide type scintillation detector 1 to generate an optical fiber 2.
The weak light pulse transmitted by
Again, in response to this light pulse, a light source such as an LED or a laser diode used in optical communication or an optical network is driven to detect one light pulse from the optical waveguide type scintillation detector 1 and immediately. One pulse is generated and transmitted to the multipoint measurement signal processing device 3. afterwards,
The data is processed / displayed using the data processing / display device 12 or the like.
With such a configuration, even when the distance between the optical waveguide type scintillation detector 1 and the signal processing device 3 is long,
The signal is not attenuated.

In this case, the optical waveguide type scintillation detector 1 does not have to be in a chain form, and two repeaters 11 are required.
May be connected in parallel to. (14) Distance extension method II (digital type) ... Claim 14
As shown in FIG. 8, a plurality of optical waveguide type scintillation detectors 1 are connected in a chain form by an optical fiber 2, and both ends of the chain of the optical fiber 2 are connected to a multipoint measurement signal processing device 3. It is connected. In the multipoint measurement signal processing device 3, the information is converted into optical digital information and sent to the data processing / display device 12 through the optical fiber 2d. In this case, conversely, the data processing / display device 12 may send a command or the like to the multipoint measurement signal processing device 3. With such a configuration, the signal is not attenuated even when the transmission distance is long.

Further, although FIG. 8 shows an example of chain connection, as shown in FIG. 9, a plurality of optical waveguide type scintillation detectors 1 are connected in parallel to the multipoint measurement signal processing device 3. It may have been done. Also in this case, the signal is not attenuated.

FIG. 10 shows an example in which a plurality of optical waveguide type scintillation detectors 1 are radially connected to the signal detecting device 7 by using the signal detecting device 7 without performing multipoint measurement by the arrival time difference. Shows.

In this case as well, the signal detection device 7 converts the measurement information into optical digital information, which is sent to the data processing / display device 12 via the optical fiber 2d as before. Also in this case, conversely, it is possible to send a command or the like from the data processing / display device 12 to the signal detection device 7. (15) Sensor structure I (center) for improving position resolution
Waveguide type): Corresponding to claim 15 Fig. 11 shows a case where the light guiding type scintillator 1 has a different focusing method. An organic scintillator 14 having a square cross section is provided inside a housing 13 whose inner surface is formed as a reflector. This cross section "b"
The inorganic scintillator 15 is embedded inside the character-shaped organic scintillator 14, and the scintillator is configured in a double structure. An optical transmission line 17 including a wavelength shifter is provided so as to penetrate the organic scintillator 14 and the inorganic scintillator 15.

Since the organic scintillator 14 on the outside is constructed in this manner, Compton scattering occurs, and the emitted light has a fast decay time. The scattered γ rays are
Light is emitted while losing energy due to multiple scattering including the inorganic scintillator 15.

The γ-rays transmitted through the organic scintillator 14 on the outer side and scattered by the inorganic scintillator 15 at the center emit a light pulse containing a large number of photons as an integrated amount although the decay time is long. Further, the scattered rays from the inorganic scintillator 15 are captured by the organic scintillator 14 on the outside and emit light.

In order to extend the number of connected optical waveguide type scintillation detectors 1 and the extension distance, it is necessary to have a large integrated light quantity, and in order to improve the position resolution, the decay time is short and the instantaneous value light quantity is high. is necessary. By the scintillator having the double structure described above, a large amount of integrated light is obtained by the inorganic scintillator 15 on average, and an optical pulse having a fast decay time component by the organic scintillator 14 is obtained. (16) Sensor structure II for improving position resolution (end
Surface-guiding type) ... Corresponding to claim 16 FIG. 12 shows a case where the light-guiding scintillator 1 has a different focusing method. In the optical waveguide scintillation detector 1 according to this example, an organic scintillator 14a having a U-shaped cross section is provided inside a housing 13 whose inner surface is formed as a reflector. The inorganic scintillator 15 is provided inside the U-shaped organic scintillator 14a.
Embedded in the organic scintillator 1
An organic scintillator 14b is provided below the 4a and the inorganic scintillator 15. That is, the inorganic scintillator 15 is embedded inside the organic scintillators 14a and 14b, and the scintillator has a double structure. Further, the transparent medium 16 is provided on the end face of the scintillation detector 1.
Is attached, so that the transparent medium 16 is penetrated,
An optical transmission line 17 including a wavelength shifter is provided inside. In this case as well, the same operational effect as in the case of (15) described above is obtained. (17) Sensor structure for improving position resolution III
(Organization by end face waveguiding) ... Corresponding to claim 17 In the structure (16) of the optical waveguide type scintillation detector described above, the transparent medium 16 itself mounted on the end face of the scintillation detector 1 is , And is replaced with an organic scintillator. In this case as well, the same operational effect as in the case of (15) described above is obtained. (18) Sensor structure IV (middle
Corresponding to claim 18 Fig. 13 shows a modification of the structure (Fig. 11) of the optical waveguide type scintillation detector of (16) described above. That is,
A portion corresponding to the inorganic scintillator 15 of FIG. 11 is penetrated by an optical transmission line 17 including a wavelength shifter at its central portion, and the inorganic scintillator 15 and the organic scintillator 14b
Are replaced by a layered structure in which are alternately arranged.

When the scintillator volume is increased in order to increase the detection efficiency, the inorganic scintillator 15 naturally becomes large. At this time, when all the energy is absorbed by only the inorganic scintillator 15 part, the organic scintillator 14
Light with a fast decay time due to a does not occur. Therefore,
In this example, as shown in FIG. 13, the inorganic scintillator 1 is used to suppress the individual volume and increase the Compton scattering probability.
5 and the organic scintillator 14b are arranged alternately. (19) Sensor structure V for improving position resolution (end
Plane, alternating) ... Corresponding to claim 19 FIG. 14 shows a modification of the structure (FIG. 12) of the optical waveguide type scintillation detector of the above (17). That is,
The inorganic scintillator 15 and the organic scintillator 14 shown in FIG.
The portion corresponding to b is replaced by a layered structure in which the inorganic scintillators 15 and the organic scintillators 14b are alternately arranged. This example is also effective when increasing the size of the light-concentrating scintillator section. (20) Sensor structure for improving position resolution III
(End face, alternating, organic) ... In the structure (FIG. 14) of the optical waveguide type scintillation detector according to (19) described above, the transparent medium 16 itself attached to the end face of the scintillation detector 1 is , And is replaced with an organic scintillator. In this case as well, the same operational effects as the case of (19) described above are exhibited.

[0061]

[Embodiment 1] FIG. 15 shows a radiation measuring apparatus according to the present invention in a leak detection system of a PWR steam generator (apparatus corresponding to FIG. 2).
An example in which is applied. High-temperature pressurized water is sent from the nuclear reactor 21 to the steam generator 22, and the generated steam is sent to the turbine by the main steam pipe 23. When leakage occurs in the steam generator, N-16 is contained in the secondary main steam, so that the leakage can be detected by increasing the radiation level.

Optical waveguide type scintillation detectors 1a, 1
Two b's were arranged in each of the main steam pipes 23 of a plurality of loops. Each of the two light extraction ports of each scintillation detector 1a, 1b has two loop-shaped optical fibers 2 in a loop shape.
a, 2b are connected, and the other ends of these two loop-shaped optical fibers 2a, 2b are connected to the multipoint measurement signal processing devices 3a, 3b.
Connected to.

To maintain long-term stability, reliability, and high sensitivity, double redundancy is provided, and the data of the two optical waveguide type scintillation detectors 1a and 1b are added, averaged, and simultaneously counted. It was measured while doing. We were able to confirm the soundness of the system as to whether the difference between the two systems was above a certain level.

[0064]

[Embodiment 2] FIG. 16A shows an example in which the radiation measuring apparatus according to the present invention (apparatus corresponding to FIG. 5) is applied to a leak detection system of a PWR steam generator. One of the two light outlets of each of the optical waveguide type scintillation detectors 1a and 1b is shielded by a reflection mirror or the like, and the other light outlets are connected to the optical fibers 2a and 2c. That is, the optical fiber 2a is connected to the light outlet of the optical waveguide type scintillation detector 1a, and the other end of the optical fiber 2a is connected to the signal detecting device 7.
Optically guided scintillation detector 1 connected to
An optical fiber 2c is connected to the light outlet of b, and the other end of the optical fiber 2c is connected to the same signal detection device 7. The three pairs of scintillation detectors 1a and 1b and the signal detection device 7 corresponding thereto are similarly configured. Further, as shown in FIG. 16B, in the detection unit, the collimator / shield 9 and the γ-ray scatterer 10 are combined so as to simultaneously count 511 keV γ-rays of positron annihilation.

High-energy γ-rays could be detected without being affected by the background γ-rays by simultaneously counting the outputs of the respective signal detecting devices 7.

[0066]

[Third Embodiment] As a further different embodiment, the present system can be applied to dose rate monitoring in nuclear facilities. In this case, long installation distances and installation of systems that span multiple floors are often required. In this case, the time resolution can be improved (15) to (20) of the “embodiment of the invention”.
It is a good idea to configure the multipoint measurement system using the scintillation detectors of FIGS. 11, 12, 13, and 14 described in FIG.

When a large number of sensor units are required on one floor and the extension distance is long, the "embodiment of the invention" is used.
It is preferable to install the relay device described in (13) of the above in units of floors.

Further, the device for performing the final monitoring by collecting the data between the floors is described in "1.
The digital information transmission method described in 4) can be used. In addition, it is effective to provide these systems with redundancy to ensure reliability, but in this case as well, the multiplexing described in (1) to (5) of "Embodiment of the Invention" is used. The method of can be used together.

[0069]

As described above, according to the present invention as a whole, it is possible to effectively use them at the same time while providing redundancy, and further to use the position resolution when used as a work exposure management system. And the extension distance of the system can be extended.

The effects of each claim are as follows.

According to the first aspect, the radiation measurement can be continued even when a plurality of sets of measurement systems or optical fibers fail.

According to the second aspect, also in this case, the radiation measurement can be continued even if a plurality of sets of measurement systems or optical fibers fail.

In claim 3, the substantial counting efficiency in the calculation can be improved.

According to the fourth aspect, the averaging process can improve the substantial statistical accuracy and reliability.

According to the fifth aspect, by performing the coincidence counting process, it is possible to eliminate accidental counting and suppress the spread of the arrival time difference distribution.

According to the sixth aspect, even if one measuring system fails, the light intensity is reduced to about half, but the measurement can be continued.

In the seventh aspect, since the plurality of sets of measurement systems are completely independent, even if one measurement system fails,
The measurement can be continued without any influence.

In the eighth aspect, when one measurement system fails, the detection efficiency has a single value, but the measurement can be continued.

In this case, also in this case, when one measurement system fails, the detection efficiency has a single value, but the measurement can be continued.

In the tenth aspect, the substantial counting efficiency in the calculation can be improved.

According to the eleventh aspect, substantial statistical accuracy and reliability can be improved by the averaging process.

According to the twelfth aspect, by performing the coincidence counting process, it is possible to eliminate accidental counting and suppress the spread of the arrival time difference distribution.

According to the thirteenth aspect, the light pulse from the weakened scintillation detector can be converted into a light pulse having a high light intensity.

According to the fourteenth aspect, the signal is not attenuated even when the total extension distance to the signal processing device is considerably long.

According to the fifteenth to seventeenth aspects, the scintillation detector having the double structure can obtain a large amount of integrated light by the inorganic scintillator on average and an optical pulse having a fast decay time component by the organic scintillator.

The eighteenth to twentieth aspects are effective in increasing the size of the condensing type scintillator portion.

[Brief description of drawings]

FIG. 1 is a schematic diagram of an example of simple multiplexing of a multipoint measurement system.

FIG. 2 is a schematic diagram of an example of demultiplexing of a multipoint measurement system.

FIG. 3 is a graph of an example of arrival time difference distribution.

FIG. 4 is a schematic diagram of an example of discriminating information corresponding to each sensor from arrival time difference information.

FIG. 5 is a schematic diagram of an example of multiplexing for a single measurement target.

FIG. 6 is a schematic diagram of an example of multiplexing for a single measurement target.

FIG. 7 is a schematic diagram of an example of a distance extension method that combines a chained system and a repeater.

FIG. 8 is a schematic diagram of an example of a distance extension method in which a chained system and a multiplexed optical transmission device are combined.

FIG. 9 is a schematic diagram of an example of a distance extension method in which a parallel system and a multiplexed optical transmission device are combined.

FIG. 10 is a schematic diagram of an example of a distance extension method that combines simple multiple connections, signal detection, and a multiplexing optical transmission device.

FIG. 11 is a sectional view of a center-guided scintillation detector.

FIG. 12 is a cross-sectional view of an edge-guided scintillation detector.

FIG. 13 is a cross-sectional view of a central waveguide type scintillation detector.

FIG. 14 is a cross-sectional view of an edge-guided scintillation detector.

FIG. 15 is a schematic diagram of an example in which the radiation measuring apparatus of the present invention is applied to an SG leak detection system.

FIG. 16 is a schematic diagram of an example in which a radiation measuring apparatus of a high energy γ-ray detection system is applied.

FIG. 17 is a schematic diagram showing a connection form of a general radiation detector.

FIG. 18 is a schematic diagram showing a connection form of a radiation measuring apparatus using an optical waveguide type scintillation detector.

[Explanation of symbols]

 1 (1a, 1b) Optical waveguide type scintillation detector 2 (2a, 2b, 2c, 2d) Optical fiber 3 Signal processing device for multipoint measurement 4 Measurement target 5 Discrimination device 6 Counting operation device 8 Signal processing device 9 Light-shielding means 10 γ-ray scatterer 11 Repeater 12 Data processing / display device 13 Housing 14 (14a, 14b) Organic scintillator 15 Inorganic scintillator 16 Transparent medium 17 Optical transmission line 18 Detector 19 Metal cable 20 Multiplexing transmission device

Claims (20)

[Claims] 1. An optical fiber having two light outlets for emitting light in response to radiation received from an object to be measured, and light incident from one of the optical fibers via one of the light outlets to the other. A radiation measuring apparatus comprising a scintillation detector which transmits light to a light outlet and sends the light from the other light outlet to an optical fiber, wherein a plurality of scintillation devices each set corresponding to a plurality of objects to be measured are provided. Multiple sets of measurement systems that have detectors, multiple sets of loop-shaped optical fibers that sequentially connect multiple sets of scintillation detectors, and multiple sets of optical fibers are connected together. And a signal processing device for measuring the radiation while detecting the light pulse input from the optical fiber to identify the scintillation detector that has sent the light pulse. Radiation measuring device that. 2. It has two light outlets for emitting light to an optical fiber according to radiation received from a measurement object, and light incident from the optical fiber via one light outlet is the other. A radiation measuring apparatus comprising a scintillation detector which transmits light to a light outlet and sends the light from the other light outlet to an optical fiber, wherein a plurality of scintillation devices each set corresponding to a plurality of objects to be measured are provided. A plurality of sets of measurement systems having detectors, a plurality of sets of loop-shaped optical fibers that sequentially connect a plurality of scintillation detectors of each set, and a plurality of sets of optical fibers are separately connected. Detecting the optical pulse input from the optical fiber, identifying the scintillation detector that sent the optical pulse, and a plurality of sets of signal processing devices for measuring the radiation,
A radiation measuring apparatus comprising: 3. A calculation for performing addition processing by inputting arrival time difference information extracted from a signal processing device, inputting a discriminating device for discriminating each position of each scintillation detector, and each position-dependent output of this discriminating device. The radiation measuring apparatus according to claim 1, further comprising a computing device. 4. A calculation for inputting arrival time difference information extracted from a signal processing device, inputting a discriminating device for discriminating each position of each scintillation detector and each position-dependent output of this discriminating device, and performing an averaging process. The radiation measuring apparatus according to claim 1, further comprising a computing device. 5. The arrival time difference information extracted from the signal processing device is inputted, and a discriminator for discriminating each position of each scintillation detector and each position-dependent output of this discriminator are inputted to perform coincidence counting processing. The radiation measuring apparatus according to claim 1, further comprising a calculation operation device. 6. An optical fiber having two light outlets for emitting light in response to radiation received from an object to be measured, and light incident from one of the optical fibers via one light outlet is connected to the other. A radiation measuring apparatus comprising a scintillation detector that transmits to a light extraction port and sends out from the other light extraction port to an optical fiber, wherein a plurality of scintillation detectors respectively arranged corresponding to a plurality of measurement targets are provided. A plurality of sets of measuring systems each having, a plurality of sets of loop-shaped optical fibers connected to one of the light outlets of one of the scintillation detectors of each set of measuring systems, and a plurality of scintillation detectors of each set of measuring systems A light-shielding device that shields the other light-exiting port, and a detector that connects a plurality of sets of optical fibers together and detects the optical pulse input from these optical fibers. A radiation measuring device characterized by the above. 7. An optical fiber having two light outlets for emitting light in response to radiation received from an object to be measured, and light incident from one of the optical fibers via one of the light outlets is supplied to the other. A radiation measuring apparatus comprising a scintillation detector that transmits to a light extraction port and sends out from the other light extraction port to an optical fiber, wherein a plurality of scintillation detectors respectively arranged corresponding to a plurality of measurement targets are provided. A plurality of sets of measuring systems each having, a plurality of sets of loop-shaped optical fibers connected to one of the light outlets of one of the scintillation detectors of each set of measuring systems, and a plurality of scintillation detectors of each set of measuring systems A light blocking means for blocking the other light outlet, and a plurality of sets of detection devices for respectively connecting a plurality of sets of optical fibers and detecting light pulses input from these optical fibers. A radiation measuring device characterized by being provided. 8. An optical fiber having two light outlets for emitting light in response to radiation received from an object to be measured, and light incident from the optical fiber via one of the light outlets to the other. A radiation measuring apparatus comprising a scintillation detector that transmits to a light extraction port and sends out from the other light extraction port to an optical fiber, wherein a plurality of scintillation detectors respectively arranged corresponding to a plurality of measurement targets are provided. A plurality of sets of measurement systems each having, a plurality of sets of optical fibers connected to two light outlets of each scintillation detector of each set of measurement systems, and a plurality of sets of optical fibers are collectively connected and A signal processing device for detecting a light pulse input from an optical fiber, identifying a scintillation detector that has sent the light pulse, and measuring radiation. The radiation measuring device according to claim. 9. It has two light outlets for emitting light to an optical fiber connected thereto in accordance with radiation received from an object to be measured, and is incident from the optical fiber through one light outlet. A radiation measuring apparatus equipped with a scintillation detector that transmits light to the other light outlet and sends the light from the other light outlet to an optical fiber. A plurality of sets of measurement systems each having a scintillation detector, a plurality of sets of optical fibers connected to the two light extraction ports of each scintillation detector of each set measurement system, and a plurality of sets of optical fibers are separately connected. , Detecting the optical pulse input from these optical fibers, and identifying the scintillation detector that sent the optical pulse,
A plurality of sets of signal processing devices for measuring radiation, and a radiation measuring device. 10. The signal processing device adds the input signal count values corresponding to a plurality of sets of optical pulses from a plurality of sets of scintillation detectors.
The radiation measurement device according to any one of 1. 11. A signal processing device averages the input signal count values when the input signal count values corresponding to a plurality of sets of light pulses from a plurality of sets of scintillation detectors are within a certain deviation, and an input signal meter. The radiation measuring apparatus according to any one of claims 7 to 9, wherein abnormal processing is performed when the numerical value is a certain deviation or more. 12. The signal processing device simultaneously counts the input signal count values corresponding to a plurality of sets of optical pulses from a plurality of sets of scintillation detectors, according to any one of claims 7 to 9. The radiation measuring device according to. 13. A detecting means for detecting an optical pulse transmitted through an optical fiber, and corresponding to the detected optical pulse,
The radiation measuring apparatus according to claim 1, further comprising a relay device including a light source that emits a light pulse having high light intensity. 14. The apparatus according to claim 1, further comprising another optical fiber for transmitting the information received from the signal processing device to the data processing / display device as digital information. Radiation measuring device in the description. 15. An optical fiber having two light extraction ports for emitting light in response to radiation received from an object to be measured, and light incident from one of the optical fibers via one light extraction port to the other. A radiation measuring apparatus comprising a scintillation detector that transmits to a light outlet and sends out to the optical fiber from the other light outlet, wherein the scintillation detector is arranged so as to surround the inorganic scintillator and the inorganic scintillator. A scintillation material, which is made of an organic scintillator and emits scintillation light in response to received radiation, and is embedded inside these scintillation materials, both ends of which are connected to an optical fiber through a light extraction port, and a wavelength shifter. And a light transmission path including the radiation transmission device. 16. An optical fiber having two light outlets for emitting light in response to radiation received from an object to be measured, and light incident from one of the optical fibers via one light outlet is connected to the other. A radiation measuring apparatus comprising a scintillation detector that transmits to a light outlet and sends out to the optical fiber from the other light outlet, wherein the scintillation detector is arranged so as to surround the inorganic scintillator and the inorganic scintillator. An organic scintillator, and a scintillation substance for emitting scintillation light in response to received radiation, a transparent medium arranged in optical contact with these scintillation substances, and embedded inside the transparent medium, Radiation, characterized in that both ends are connected to an optical fiber at light extraction ports, and an optical transmission line including a wavelength shifter is provided. measuring device. 17. An optical fiber having two light outlets for emitting light in response to radiation received from an object to be measured, and light incident from one of the optical fibers via one light outlet is supplied to the other. A radiation measuring apparatus comprising a scintillation detector that transmits to a light outlet and sends out to the optical fiber from the other light outlet, wherein the scintillation detector is arranged so as to surround the inorganic scintillator and the inorganic scintillator. A scintillation material which is composed of an organic scintillator and emits scintillation light in response to received radiation; another organic scintillator arranged in optical contact with these scintillation materials; and this another organic scintillator. An optical transmission line that is embedded inside the optical fiber and has both ends connected to an optical fiber at the light extraction outlets and that includes a wavelength shifter. Radiation measuring device characterized by being. 18. An optical fiber having two light outlets for emitting light in response to radiation received from an object to be measured, and light incident from the optical fiber via one of the light outlets is supplied to the other. A radiation measuring apparatus comprising a scintillation detector that transmits to a light outlet and sends out to the optical fiber from the other light outlet, wherein the scintillation detector comprises inorganic scintillators and organic scintillators arranged alternately. , And a scintillation material for emitting scintillation light according to the received radiation, and an optical transmission that is embedded inside the scintillation material, both ends of which are connected to an optical fiber at each light extraction port and that includes a wavelength shifter. A radiation measuring apparatus comprising: a path. 19. The optical fiber according to claim 1, wherein the optical fiber emits light in response to radiation received from the object to be measured. A radiation measuring apparatus comprising a scintillation detector that transmits to a light outlet and sends out to the optical fiber from the other light outlet, wherein the scintillation detector comprises inorganic scintillators and organic scintillators arranged alternately. And, a scintillation material for emitting scintillation light according to the received radiation, a transparent medium arranged in optical contact with the scintillation material, and embedded inside the transparent medium, both ends of which emit light respectively. A radiation measuring apparatus, comprising: an optical transmission line connected to an optical fiber at an outlet and including a wavelength shifter. 20. Two light outlets for emitting light to an optical fiber in response to radiation received from a measurement target, and light incident from the optical fiber via one light outlet is connected to the other. A radiation measuring apparatus comprising a scintillation detector that transmits to a light outlet and sends out to the optical fiber from the other light outlet, wherein the scintillation detector comprises inorganic scintillators and organic scintillators arranged alternately. , And a scintillation material for emitting scintillation light in accordance with the received radiation, another organic scintillator arranged in optical contact with the scintillation material, and embedded inside the other organic scintillator, And an optical transmission line including a wavelength shifter, both ends of which are connected to an optical fiber at a light outlet. Radiation measuring device.