JPH0313883A - Apparatus for calibrating radiation measuring device - Google Patents

Abstract

PURPOSE:To double the fixing and confirmation of a radiation source by providing a radiation detector for confirming the selection/housing of the irradiated radiation source apart from a radiation measuring detector. CONSTITUTION:A radiation measuring device calibrating apparatus 200 is constituted by loading a calibration truck 1 with a radiation measuring device 4 such as a servey meter performing the calibration of indication graduations and also loading said truck 1 with a radiation detector 5 capable of discriminating radiation sources 6. The specific radiation source 6 is selected from a storing part 7 made of lead having many kinds of the radiation sources 6 stored therein by a selection mechanism 8 and taken out while allowed to rise or fall by a lift mechanism 9 to irradiate the radiation measuring device 4. At this time, since the output signal of the radiation detector 5 is displayed on the setting and display panel 11 of a control panel 10, the identification and confirmation of the irradiation and housing of the radiation sources 6 are doubled and the kind of radiation can be identified.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a radiation meter calibration g setting for calibrating the indicating scale by irradiating the radiation meter with radiation, mainly gamma rays.

(Prior Art) FIG. 2 shows a schematic configuration diagram of a conventional radiation measuring instrument calibration device. In the figure, the radiation measuring device calibration device 100 mainly includes the irradiation device 3 and the control! It consists of 11 boards 10 and a calibration cart 1. Of these, the illumination device 3 is a radiation source (
radiation source) 6, storage section 7, selector 4M8, lifting mechanism 9, and drive section 12.

Further, the calibration trolley 1 is equipped with a radiation measuring device 4 that can be raised and lowered, a camera 14, and a drive unit 13. In addition, 2 is a rail for moving the trolley, 11 is a setting/display panel provided on the control panel 10 that covers the operation setting and v operation display, and 15
is an industrial television monitor connected to a camera 14 that monitors the radiation measuring instrument 4.

A specific radiation source 6 is selected by the selection mechanism 8 from the lead storage section 7 in which many types of radiation sources 6 are stored, and the elevating mechanism 9
The radiation is lifted and taken out by the radiator, and is irradiated onto the radiation measuring instrument 4, which is the object to be calibrated. In addition, the operation of storing the radiation source 6 after irradiation aJ and its confirmation are performed by the control panel 1 that remotely controls this operation.
According to the operation display of the setting/display panel 11 at 0.

For example, when selecting the radiation source 6 named A, by turning on the selection switch A, the number 8 of the radiation source 6 will be displayed, and this signal will select the radiation source 6 in the irradiation device 3. Drive the mechanism 8 and the elevator 4F49 that raises and lowers.
Activate the lever drive unit 12 and illuminate the line 11iii6 A.
1) Move from the storage section 7 of the l device 3 to the OJ port 3A. And by checking the operation of this irradiation @3,
It was determined that A of this radiation source 6 was definitely selected, and it was confirmed that it was being irradiated.

(Problem to be Solved by the Invention) However, in the conventional calibration device@100, since it relied only on checking the operation of the drive unit 12 which is the drive system, malfunction of the drive unit 12 and settings/displays on the control panel 10 may occur. When a display failure occurs on the panel 11, to investigate the cause, check the presence or absence of the line gi6, the drive unit 12, and the setting/display panel 11.
It was necessary to sequentially investigate defects, etc. in a time-consuming manner. In particular, identifying the presence or absence of the radiation source 6 poses a risk of radiation exposure to workers, and it has been desired to improve the reliability and safety of the method for identifying and confirming the radiation source 6.

In view of the above-mentioned points, an object of the present invention is to provide a radiation calibration device that effectively solves the problems of the prior art, facilitates radiation source identification and recognition, and improves its reliability and safety. shall be.

(Means for Solving the Problems) In order to achieve such an object, the present invention provides a storage section in which many types of radiation sources are stored, and a storage section in which the radiation source is emitted from the storage section.
) An irradiation device consisting of a drive unit that selects, irradiates, and stores one radiation source, a control panel that remotely controls this irradiation device, and calibrates the indication scale by measuring the radiation irradiated from the radiation source. In the radiation calibration device, the calibration platform Φ is equipped with the radiation selected and irradiated by the irradiation device. ) Features an M-ray detector for identifying and confirming the J-ray source.

(Function) By using such technical means, this Komei is capable of detecting radiation for the purpose of selecting and storing radiation sources that are illuminated with Q=1 in addition to the 04-ray measuring instrument that is the object to be calibrated on the calibration trolley. Since it is equipped with a radiation source, the type of radiation source, irradiation, or storage can be easily identified and NH. identification and [methods can be easily duplicated, improving reliability and safety.

(Example) Next, an example of the present invention will be described in detail based on the drawings.

FIG. 1 shows a schematic configuration diagram of an embodiment of the present invention.

In the figure, parts having the same functions as in FIG. 2 are given the same reference numerals. The radiation measuring device calibration device 200 is equipped with a radiation measuring device 4 such as an alarm meter or a nave meter to be calibrated which calibrates an indication scale etc. on a calibration cart 1, and also has a radiation measuring device 4 capable of discriminating a radiation source 6. Equipped with device 5.

Calibration trolley 1 is t! l1a10 settings/display panel 1
In response to the operation setting signal No. 1, the drive unit 13 is driven to move on the rail 2 and set the distance to the irradiation device 3. The radiation detector 5 includes thallium-activated sodium iodide [Na1
(TI) ] A detector that can discriminate the radiation source 6 such as a scintillator, output signal for identification of the radiation source 6 and rs recognition, control panel 1
0 setting/input on display panel 11 and display.

With this configuration, the output signal of the discriminative radiation detector 5 of the radiation source 6 is displayed on the setting/display panel 11 of the control panel 10, so that the drive section 1 that is the drive system
Along with the confirmation in step 2, the confirmation function is duplicated, and the identification and flg of the radiation Q4 and storage of the selected and set radiation source 6 is ensured, and its reliability is improved.

In particular, it is easy to identify the type of the selected radiation source 6, and the intensity of the radiation source 6 can be measured. ! It is also possible to measure and display the hanging ratio. Therefore, the moving distance of the calibration trolley can be checked reliably, and the reliability of moving distance setting is improved. Furthermore, displaying the irradiation dose rate at a predetermined position on the calibration trolley 1 can prevent inadvertent radiation exposure.

(Effects of the Invention) As explained above, according to the present invention, the outside of the radiation measuring instrument that is the object to be calibrated is irradiated to the outside of the radiation measuring device to be calibrated. By providing the calibration device on the calibration trolley, the problems of the conventional technology are effectively solved.
The irradiation system is a conventional drive system! In contrast to the dependence on the operation of the FF and control panel [2], the radiation source identification and confirmation group functions are duplicated, and the type of radiation source, irradiation, or storage can be easily identified and maintained, and its reliability is increased. This has the effect of improving safety and safety.

[Brief explanation of drawings]

FIG. 1 is a schematic block diagram of an embodiment of the present invention, and FIG. 2 is a schematic block diagram of a conventional radiation measuring instrument calibration device. DESCRIPTION OF SYMBOLS 1... Calibration trolley, 3... Irradiation device, 4... Radiation measuring device, 5... Radiation detector, 6... Radiation source, 7... Storage part, 8... Selection RI4 ．． 9... Lifting mechanism, 10... Control panel, 11... Setting/display panel, 12.13... Drive unit, 200... Radiation measuring instrument calibration device.

Claims (1)

[Claims] 1) An irradiation device consisting of a storage section in which many types of radiation sources are stored and a drive section that selects, irradiates, and stores the radiation source from the storage section; a control panel that remotely operates this irradiation device; In a radiation calibration device comprising a calibration trolley carrying a radiation measuring device that calibrates its indication scale by measuring radiation emitted from a radiation source, the radiation source selected and irradiated by the irradiation device onto the calibration trolley; A radiation measuring device calibration device characterized by comprising a radiation detector for identifying and confirming.