JPH0511057A - Radiation-spectrum measuring apparatus - Google Patents

Abstract

PURPOSE:To achieve the high seed and the high accuracy of measuring operation for radiation spectrum and to make the entire apparatus compact with respect to a radiation-spectrum measuring apparatus wherein the radiation from a material to be measured such as a used measuring apparatus which is exposed to radiation and a drum filled with radioactive waste is detected and measured with a spectrum detecting sensor. CONSTITUTION:In a radiation-spectrum measuring apparatus, an AD converter 11, a converted-value recording memory device 12 and a data processing device 14 having a display device 13 are sequentially connected to a spectrum detecting sensor 10 facing a body to be measured 1. An offset generator 15 which can input a position switching signal is provided between the AD converter 11 and the converted-value recording memory device 12. A movement detecting device 16 is connected to the offset generator 15 so as to output a position switching signal (b).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention detects the radiation of an object to be measured such as a used measuring instrument used in a nuclear power plant and exposed to radiation or a drum filled with radioactive waste with a spectrum detection sensor. The present invention relates to a radiation spectrum measuring device for measuring and recording.

[0002]

2. Description of the Related Art Conventionally, a radiation spectrum measuring apparatus of this type is constructed as shown in FIG.

That is, in FIG. 4, a first spectrum detection sensor 2a is arranged in a first region (first measurement region) 1a of the object to be measured 1 so as to face each other.
The spectrum detection sensor 2a includes a first AD converter 3a.
Are connected. In addition, the first AD converter 3a includes
The first conversion value recording memory device 4a is connected, and the first AD converter 3a and the first conversion value recording memory device 4 are connected.
"a" constitutes the first multiple wave height analyzer 5a. Further, a data processing device 7 having a display device 6 is connected to the first converted value recording memory device 4a.

On the other hand, in the second region 1b of the object to be measured 1, a second spectrum detecting sensor 2b is arranged so as to face each other.
The second AD converter 3b is connected to b. A second converted value recording memory device 4b is connected to the second AD converter 3b, and the second AD converter 3b and the second converted value recording memory device 4b are connected to each other by a second multiple wave height analysis. It constitutes the device 5b. Further, the data processing device 7 having the display device 6 is connected to the second converted value recording memory device 4b.

On the other hand, in the third region 1c of the object 1 to be measured, a third spectrum detecting sensor 2c is arranged so as to face each other.
The third AD converter 3c is connected to c. A third converted value recording memory device 4c is connected to the third AD converter 3c, and the third AD converter 3c and the third converted value recording memory device 4c are connected to a third multiple wave height analysis unit. It constitutes the device 5c. Further, a data processing device 7 including the display device 6 is connected to the third converted value recording memory device 4c, and is connected to the data processing device 7 so as to output a position switching signal. A switching detection device 8 is connected to detect that the measurement object 1 has moved to the next measurement area.

Therefore, in the radiation spectrum measuring apparatus described above, first, in the first region 1a of the device under test 1, the first region 1a
The spectrum detection sensor 2a measures the radiation spectrum of the first area 1a, and the detection signal is detected by the first AD converter 3a.
Input to this first AD converter 3a performs AD conversion,
This is input to the first conversion value recording memory device 4a, and thereafter, the first conversion value recording memory device 4a is input to and recorded in the data processing device 7 connected thereto, and the display device 6 shows the measurement data of the radiation spectrum of the first region 1a of the DUT 1.

Next, when the measurement operation of the radiation spectrum of the first region 1a of the device under test 1 is completed, the first spectrum detection sensor 2a to the second spectrum detection sensor 2a are operated based on the completion of the measurement operation.
It is switched to the spectrum detection sensor 2b, and the switching detection device 8 connected to the data processing device 7 outputs a position switching signal to switch the position to the next second measurement region with respect to the DUT 1. Input to the data processing device 7.

As a result, the data processing device 7 switches to the next second measurement area for the object to be measured 1 and measures the radiation spectrum of the second area 1b of the object to be measured 1.

That is, in the second region 1b of the object 1 to be measured, the second spectrum detection sensor 2b measures the radiation spectrum of the second region 1b and inputs the detection signal to the second AD converter 3b. The converter 3b performs AD conversion, inputs this to the second conversion value recording memory device 4b, and then the second conversion value recording memory device 4b connects to the data processing device 7 connected thereto. While inputting and recording, the second area 1b of the DUT 1 is displayed on the display device 6.
The measurement data of the radiation spectrum of is displayed.

Next, when the measurement operation of the radiation spectrum of the second region 1b of the object to be measured 1 is completed, the second spectrum detection sensor 2b to the third spectrum detector 3b are detected based on the completion of the measurement operation.
It is switched to the spectrum detection sensor 2c, and the switching detection device 8 connected to the data processing device 7 outputs a position switching signal to indicate that it has reached the next third measurement region for the DUT 1. Input to the processing device 7.

As a result, the data processing device 7 switches to the third measurement region for the object to be measured 1 and measures the radiation spectrum of the third region 1c of the object to be measured 1.

That is, in the third region 1c of the object 1 to be measured, the third spectrum detecting sensor 2c measures the radiation spectrum of the third region 1c, inputs this detection signal to the third AD converter 3c, and outputs this third AD. The converter 3c performs AD conversion, inputs this to the third conversion value recording memory device 4c, and then the third conversion value recording memory device 4c to the data processing device 7 connected thereto. While inputting and recording, the third area 1b of the DUT 1 is displayed on the display device 6.
Display the measurement data of the radiation spectrum of.

In this way, the above-mentioned radiation spectrum measuring apparatus is designed to measure and record each region of the object to be measured 1 by the respective spectrum detecting sensors 2a, 2b, 2c in order.

[0014]

However, the radiation spectrum measuring apparatus described above spends a lot of data saving time between the end of the measurement operation of the radiation spectrum and the start of the next measurement, and the measurement is continuously and missed. Not only is it difficult to measure the radiation spectrum without using it, but also a large number of multiple wave height analyzers 5a, 5b, and 5c are required, which makes the entire device large, restricting the installation location and increasing the cost. There is a problem such as becoming.

In order to solve the above-mentioned problems, the present invention provides a radiation spectrum measuring apparatus in which the measurement operation of the radiation spectrum is speeded up and the accuracy is improved, and the entire apparatus is miniaturized to be inexpensive. The purpose is to do.

[0016]

SUMMARY OF THE INVENTION The present invention is a radiation spectrum measuring apparatus in which a spectrum detecting sensor facing an object to be measured is sequentially connected with an AD converter, a memory device for recording converted values, and a data processing device equipped with a display device. In the above A
An offset generator capable of inputting a position switching signal is provided between the D converter and the converted value recording memory device, and a movement detecting device is connected to the offset generator so as to output a position switching signal.

[0017]

According to the present invention, first, in the first region of the object to be measured, the spectrum detection sensor measures the radiation spectrum of the first region, inputs this detection signal to the AD converter, and this AD converter performs AD conversion. Then, after inputting this into an offset generator capable of inputting a position switching signal, this is input into a conversion value recording memory device, and thereafter, this conversion value recording memory device is connected to this. When the measurement data of the radiation spectrum of the first region is displayed on the display device while being input to and recorded in the data processing device, and the measurement operation of the radiation spectrum of the first region of the measured object is completed, the measurement is performed. Upon completion of the operation, the spectrum detection sensor is relatively moved from the first region to the next region of the object to be measured, and the movement detection device switches the position of the spectrum detection sensor to the offset generator. To detect the arrival of the next measurement area for the object to be measured, and to sequentially measure the radiation spectrum in the next measurement area of the object to be measured to speed up and increase the radiation spectrum measurement operation. In addition to improving accuracy, the entire device can be downsized and provided at low cost.

[0018]

The present invention will now be described with reference to the illustrated embodiments.

In FIGS. 1 and 2, reference numeral 1 is a flat object to be measured, such as a used measuring instrument used in a nuclear power plant and exposed to radiation.
Is provided with a spectrum detection sensor 10 shielded by a shield 10 a so as to face the DUT 1. The spectrum detection sensor 10 receives a radiation spectrum from another measurement region of the DUT 1. Is shielded by the shield 10a to improve the measurement accuracy. An AD converter 11 is connected to the spectrum detection sensor 10 so as to AD-convert the detection signal from the spectrum detection sensor 10. A data processing device 14 having a conversion value recording memory device 12 and a display device 13 is sequentially connected to the AD converter 11, and is connected to the AD converter 11 and the conversion value recording memory device 12. An offset generator 15 is provided between which an input of a position switching signal is possible and the value is converted into an AD conversion value. A movement detection device 16 is connected to the offset generator 15 so as to output a position switching signal, Moreover, it is provided so as to detect the arrival at the next measurement region with respect to the DUT 1.

The operation of the present invention will be described below.

Therefore, first, the first region 1a of the DUT 1 is measured.
In the first area 1a
To measure the radiation spectrum of. Then, this detection signal is input to the AD converter 11, and this AD converter 11 performs AD
After conversion, this is input to the offset generator 15 for the AD conversion value to which the position switching signal can be input, then this is input to the conversion value recording memory device 12, and then this conversion value recording memory The device 12 inputs and records the data to the data processing device 14 connected to the device 12, and displays the measurement data of the radiation spectrum of the first region 1a on the display device 13 and displays the first data of the measured object 1 When the measurement operation of the radiation spectrum of the area 1a is completed, the spectrum detection sensor is relatively moved from the first area of the measured object to the next second area based on the completion of the measurement operation. After the movement detection device 16 detects this, it outputs a position switching signal to the offset generator 15, and this offset generator 15 detects that the next measurement area 1b for the object to be measured 1 is reached. To do.

In this way, the spectrum detection sensor 10 receives the position switching signal from the movement detection device 16 to the offset generator 15 and the measured object 1 is measured.
The radiation spectra of the respective measurement areas 1b, 1c, 1d, 1n next to are sequentially measured.

That is, the measurement areas 1b, 1 of the object to be measured 1
The relationship between c, 1d, 1n and the radiation spectrum is repeatedly measured by counting as shown in the graph of FIG.

As a result, according to the present invention, the operation of measuring the radiation spectrum is speeded up and the accuracy is improved, and the size of the entire apparatus is reduced.

Next, another embodiment of the present invention shown in FIG. 3 is shielded by a shield 10a facing a cylindrical object 1 to be measured such as a drum filled with radioactive waste. The spectrum detecting sensor 10 measures a radiation spectrum, and the spectrum detecting sensor 1
The radiation spectrum of each measurement region of the cylindrical object to be measured 1 is measured and recorded by repeating the rotating operation and the elevating operation of the object to be measured 1 having a cylindrical shape with respect to 0.

[0026]

As described above, according to the present invention, the radiation is obtained by sequentially connecting the spectrum detecting sensor facing the object to be measured with the AD converter, the conversion value recording memory device, and the data processing device having the display device. In the spectrum measuring device, an offset generator capable of inputting a position switching signal is provided between the AD converter and the converted value recording memory device, and the movement detecting device outputs the position switching signal to the offset generator. Since they are connected, the radiation spectrum measuring operation can be speeded up and the accuracy can be improved, and the whole apparatus can be downsized and provided at low cost.

[Brief description of drawings]

FIG. 1 is a block diagram of a radiation spectrum measuring apparatus of the present invention.

FIG. 2 is a graph showing a relationship between each measurement region of a measured object of the present invention and a radiation spectrum.

FIG. 3 is a diagram showing another embodiment of the present invention.

FIG. 4 is a block diagram of a conventional radiation spectrum measuring apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Object to be measured 10 Spectrum detection sensor 11 AD converter 12 Memory device for recording converted value 13 Display device 14 Data processing device 15 Offset generator 16 Movement detection device

Claims (1)

Claim: What is claimed is: 1. A radiation spectrum measuring apparatus comprising: a spectrum detecting sensor facing a measured object; An offset generator provided between the AD converter and the converted value recording memory device and capable of inputting a position switching signal, and an offset generator connected to output a position switching signal to the offset generator And a movement detection device that detects that the measurement region has reached the measurement region.