JPH1164524A - Fluoroglass dosimeter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fluoroglass dosimeter enabling protection of a glass element with it not stored in a filter case and preventing an error in orienting it for storing. SOLUTION: A glass element 4, being stored in a protection case 5 made of resin or the like to which an identification label 9 is attached, is stored in a protection-case storing part 14 of a filter case 10. A chamfer 4 is formed on one of four corners of the glass element 2 and an inward projecting part 7 is provided on the protection case 5 at a part corresponding to the chamfer 4 formed on the glass element 2. An outward projecting part 8 is provided on a peripheral part of the protection case 5 and an inward recessed part 15 is provided on the protection-case storing part 14 of the filter case 10 at a part corresponding to the outward projecting part 8 formed on the protection case 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluorescent glass dosimeter for separately measuring a radiation exposure dose of multi-line radiation.
The present invention relates to a fluorescent glass dosimeter that facilitates transportation of a glass element and prevents a wrong orientation of the glass element when the glass element is stored in a filter case.

[0002]

2. Description of the Related Art Today, radiation is used in various fields such as nuclear power generation and medical fields, research in solid state physics and life sciences, chemical use such as trace element analysis of chemical reactions, and application to material engineering. It's being used. Particularly in the medical field, radiation plays a very important role, such as the use of computed tomography (CT) and the use of radioisotope tracers. However, radiation exposure has a detrimental effect on normal living bodies, and the risk increases in proportion to the magnitude of radiation exposure. Therefore, it is necessary for workers who handle radiation to accurately measure the amount of radiation exposure and to sufficiently perform radiation management.

Conventionally, in measuring such radiation exposure, a fluorescent glass element made of phosphate glass containing silver ions has been used. When the fluorescent glass element is excited by the ultraviolet rays of the ionizing radiation, fluorescence is emitted from a predetermined glass surface. Since the intensity of the emitted fluorescence is proportional to the exposure radiation dose, the exposure radiation dose of the fluorescent glass element can be measured by detecting the fluorescence intensity.

Therefore, a fluorescent glass dosimeter using the above fluorescent glass element has been developed. The following two types of fluorescent glass dosimeters have been developed. One is a fluorescent glass dosimeter as shown in FIG. FIG. 1A is an exploded perspective view showing the configuration of the fluorescent glass dosimeter 20, and FIG. 1B is a front view of a lower filter case 21b described later.

As shown in FIG. 3A, a fluorescent glass dosimeter 20 includes a glass element 22, a card 23 which is a metal holder for holding the glass element 22, and an upper filter case 21a for accommodating the card 23. And the lower filter case 21b. The card 23 has a hole code 24 for identifying the glass element 22.
Is provided. Then, as shown in FIG.
The glass element 22 is mounted on a card 23, and the card 23
Is housed in the upper filter case 21a and the lower filter case 21b to form a capsule. When used, the capsule is carried by an operator or set at an appropriate place.

As shown in FIG. 3B, a label 25 is provided on the front of the lower filter case 21b. The label 25 is configured so that a wearer, a dosimeter installation place, and the like can be identified. Furthermore,
On the inner surface of the upper filter case 21a, there are provided a plurality of filters 26, 26,.

Further, another one is a fluorescent glass dosimeter 30 as shown in FIG. FIG. 1A is an exploded perspective view showing a configuration of a fluorescent glass dosimeter, and FIG. 1B is a sectional view after assembly.

As shown in FIG. 4A, a fluorescent glass dosimeter 30 includes a glass element 31, a card 32 which is a metal holder for holding the glass element 31, and an inner filter case 33a for accommodating the card 32. And an outer filter case 33b. The card 32 has a plurality of openings 34, 34,.
A hole code 35 for identifying the glass element 31 is provided.

Then, as shown in FIG. 4A, a glass element 31 is mounted on a card 32, and the card 32 is attached to the inner filter case 33a and the outer filter case 33.
The capsule is housed in a capsule b as shown in FIG. 4 (b), and the capsule is carried by an operator at the time of use or set at an appropriate place.

As shown in FIG. 4A, a label 36 is provided on the upper surface of the outer filter case 33b to identify a wearer, a dosimeter installation place, and the like. Further, on the outer peripheral surface of the inner filter case 33a, a plurality of filters 37, 37,.
Is provided.

In each of the conventional fluorescent glass dosimeters described above, the glass elements 22 and 31 are not provided with codes for identifying the elements. Therefore, the glass elements 22 and 31 are identified in a state where they are stored in the cards 23 and 32 provided with the hole codes 24 and 35.

[0012]

By the way, in the above-mentioned conventional fluorescent glass dosimeter, the card accommodating the glass element is constituted by a thin metal plate, that is, a sheet metal part. Therefore, in a state where the glass element is simply stored in the card, the glass element cannot sufficiently withstand an impact such as dropping, and the glass element may be damaged.

Therefore, in order to protect the glass element, it is necessary to transport the glass element while keeping the card in the filter case. That is, when the glass element is sent or returned between the wearer of the fluorescent glass dosimeter and the person who measures the exposure dose, the glass element is stored in the filter case. for that reason,
When the glass element is transported, the outer dimensions of the transported material become large, and the burden of packaging and the burden of transportation costs have been a problem.

[0014] Not only the fluorescent glass dosimeter but also a thermoluminescence dosimeter (hereinafter referred to as TLD) has a similar problem since the TLD element itself is not provided with the identification means.

On the other hand, in a film badge dosimeter (hereinafter referred to as FB) 40 as shown in FIG. 5, a film 41 is used instead of a glass element. In use, the FB 40 is carried by an operator with the film 41 housed in the filter case 42 or installed at an appropriate place. In addition, the film 41
Unlike a glass element or a TLD element, the element has a thin plate shape and has an identification label 43 on the surface. Therefore, the film 41 could be transported alone, and the transport and return as in the case of a glass element or a TLD element were hardly performed, and the transportation was easy with little burden.

However, this film 43 is
As shown in (2), since it is rectangular and symmetrical in the left, right, up, and down directions, there is a risk that the upper, lower, left, right, or front and rear directions may be erroneously set when stored in the filter case 42. Therefore, there is a problem that the radiation exposure dose cannot be measured accurately when the erroneous setting is performed in such a manner.

The present invention has been proposed in order to solve the problems of the prior art as described above.
Provided is a fluorescent glass dosimeter that enables the glass element to be protected from impacts such as dropping without being housed in the filter case, and that can reliably perform the glass element in the correct direction when housed in the filter case. Is to do.

[0018]

According to a first aspect of the present invention, there is provided a fluorescent glass dosimeter having a glass element which is excited by ultraviolet rays to generate fluorescence when light is excited, and a filter case which houses the glass element. The glass dosimeter is characterized in that the glass dosimeter has a glass element storage section configured to store the glass element and is provided with a glass element protection unit that is stored in the filter case.

According to the first aspect of the present invention, the glass element protecting means is made of a member having a strong resistance to impact, such as a resin material, and the glass element is protected by the glass element protecting means. To be stored. By storing the glass element in the glass element protecting means as described above, the glass element can be protected from impact such as dropping. for that reason,
The glass element can be transported while housed in the glass element protection means. Therefore, since it is not necessary to store the glass element in the filter case and transport the entire filter case as in the related art, the outer dimensions and weight during transportation can be significantly reduced, and the transportation cost can be significantly reduced. It becomes possible.

A fluorescent glass dosimeter according to a second aspect of the present invention is the fluorescent glass dosimeter according to the first aspect, wherein the glass element and the glass element protecting means are provided with a storage direction regulating means for the glass element. I have.

According to the second aspect of the present invention, when the glass element is housed in the glass element protecting means, the direction is not erroneous, so that accurate measurement can be performed and the reliability of data can be improved. Can be.

According to a third aspect of the present invention, there is provided the fluorescent glass dosimeter according to the second aspect, wherein the storage direction restricting means makes the shape of the glass element up-down and left-right asymmetric, and the glass element protecting means. Wherein the shape of the glass element accommodating portion is made to match the shape of the glass element.

According to the third aspect of the invention, the shape of the glass element and the glass element housing portion of the glass element protecting means can be used to regulate the direction in which the glass element is housed. And the glass element can be easily attached to and detached from the glass element protecting means.

According to a fourth aspect of the present invention, in the fluorescent glass dosimeter according to any one of the first to third aspects, the mounting direction of the glass element protecting means on the glass element protecting means and the filter case. It is characterized by the provision of regulating means.

According to the fourth aspect of the present invention, when the glass element protecting means is mounted on the filter case, it can be mounted without erroneous direction, so that accurate measurement can be performed, and data can be obtained. Reliability can be improved.

According to a fifth aspect of the present invention, in the fluorescent glass dosimeter according to the fourth aspect, the mounting direction restricting means has a shape of the glass element protecting means which is vertically and horizontally asymmetric, and wherein the filter case is provided. Is characterized in that the shape of the glass element protection means housing portion provided in the above is matched with the shape of the glass element protection means.

According to the fifth aspect of the present invention, the mounting direction of the glass element protecting means can be regulated by utilizing the shapes of the glass element protecting means and the glass element protecting means housing portion of the filter case. The number of members can be minimized, and the glass element protecting means can be easily attached to and detached from the filter case.

[0028]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. (1) Configuration FIG. 1 shows an assembling sequence of the fluorescent glass dosimeter 1 according to the present embodiment, and FIG. 2 shows a configuration of the fluorescent glass dosimeter 1 after assembly. (a) shows a front view, and (b) shows a cross-sectional view.

In these figures, reference numeral 2 denotes a glass element, and an identification code 3 is attached to the surface thereof. The identification code 3 is, for example, engraved on the glass element 2. The glass element 2 has a rectangular shape, and a chamfer 4 is formed at one of the four corners. In the present embodiment, the glass element 2 is a fluorescent glass element, and generally silver activated phosphate glass or the like containing silver ions is used.

In FIGS. 1 and 2, reference numeral 5 denotes a protective case for a glass element, which is made of a member such as a resin material which can sufficiently withstand an impact such as a drop. The protective case 5 has an opening at the top, and is provided with a glass element housing portion 6 into which the glass element 2 is fitted. The shape of the glass element housing 6 is configured to match the shape of the glass element 2. And the glass element 2
The portion corresponding to the chamfer 4 formed at the bottom is provided with a convex portion (hereinafter referred to as an inner convex portion) 7 toward the inside, and when the glass element 2 is stored in the protective case 5, the chamfer is formed. 4 and the inner convex portion 7 are configured to engage with each other. Also, along the outer side of the longitudinal side of the protective case 5,
A convex portion (hereinafter, referred to as an outer convex portion) 8 is provided. The outer convex portion 8 is configured such that a part of a side portion of the protective case 5 protrudes outward from another portion.

Reference numeral 9 denotes an identification label, which covers the upper part of the protective case 5 in which the glass element 2 is stored. On the surface of the identification label 9, information such as a glass element code, a name of a wearer of the fluorescent glass dosimeter 1, and a wear period are shown. Both ends in the longitudinal direction of the identification label 9 are bent at substantially right angles, and these two ends are in contact with the outside of both ends in the longitudinal direction of the protective case 5.

Reference numeral 10 denotes a filter case, which comprises an upper filter case 10a and a lower filter case 10b. The rear end portion of the upper filter case 10a and the rear end portion of the lower filter case 10b are rotatably supported by the rotary joint 11. The lower filter case 1 is attached to the tip of the upper filter case 10a.
An engaged portion 12 protruding toward the 0b side is provided. Further, a locking portion 13 for coupling with the engaged portion 12 of the upper filter case 10a is provided at a distal end portion of the lower filter case 10b. That is, when the upper filter case 10a is rotated in the direction of arrow A and the upper filter case 10a and the lower filter case 10b are combined, the engaged portion 12 is engaged with the locking portion 13 and fixed. Has become.

When the upper filter case 10a and the lower filter case 10b are combined, the filter case 1
The protective case housing portion 14 is formed inside the inside of the housing. The shape of the protective case housing portion 14 is configured to match the shape of the protective case 5.
A concave portion (hereinafter referred to as an inner concave portion) 15 is provided in a portion corresponding to the outer convex portion 8 formed in the protective case 5, and the protective case 5 is stored in the protective case storage portion 14. In this case, the outer convex portion 8 and the inner concave portion 15 are configured to engage with each other.

Further, a plurality of filters 16, 16, for separating poly-radiation are provided on the inner peripheral surface of each of the upper filter case 10a and the lower filter case 10b.
... are provided respectively.

As shown in FIG. 2B, a clip 17 for attaching the fluorescent glass dosimeter 1 to clothes or the like is provided below the lower filter case 10b. (2) Operation and Effect The fluorescent glass dosimeter of the present embodiment having such a configuration has the following operation and effect. That is, FIG.
As shown in (1), after the glass element 2 is stored in the protective case 5, the upper part thereof is sealed with the identification label 9. afterwards,
These are housed in the protective case housing section 14 of the lower filter case 10b, and the upper filter case 10a is rotated in the direction of arrow A to engage the engaged portion 12 with the locking portion 13. Thus, the fluorescent glass dosimeter 1 has a shape as shown in FIGS. 2 (a) and 2 (b). This is clip 1
The radiation exposure dose is measured by wearing the device on the wearer's clothes or the like according to FIG.

When the glass element 2 is transported, the filter case 10 is opened, and the protective case 5 is taken out of the protective case storage section 14. In the present embodiment, since the glass element 2 is housed in the protective case 5 made of a resin material or the like, even when the glass element 2 is taken out of the filter case 10, it is sufficiently protected from impacts such as dropping. Therefore, the glass element 2 can be transported while being taken out of the filter case 10.

The thickness of the protective case 5 is shown in FIG.
As shown in the cross-sectional view of (b), the minimum thickness that can protect the glass element 2 is sufficient, so that the outer shape of the protective case 5 can be reduced in size.

As described above, the weight of the glass element 2 during transportation can be greatly reduced, and the outer dimensions can be significantly reduced, so that it is possible to save the time and effort required for packaging and to reduce the transportation cost. .

Further, since the chamfer 4 is formed in a part of the glass element 2 and the inner convex portion 7 which engages with the chamfer 4 is provided in the glass element accommodating portion 6 of the protective case 5, the glass element 2 The direction of storage in the storage section 6 can be regulated. Further, an outer convex portion 8 is provided on the outer peripheral portion of the protective case 5,
Since the inner recess 15 that engages with the outer projection 8 is provided in the protective case housing 14 of the filter case 10, the direction in which the protective case 5 is housed in the protective case housing 14 can be regulated. With these configurations, it is possible to prevent the mounting direction of the glass element 2 from being incorrect. As a result, the estimation of the radiation incident direction is ensured, the measurement accuracy of the glass element 2 is improved, and the reliability of data can be increased. (3) Other Embodiments The present invention is not limited to the above-described embodiments, but can be implemented in various forms. That is, the glass element is not limited to a shape having a chamfer, and may have any shape such that the glass element is asymmetrical in up, down, left, and right. For example, an uneven portion may be provided in a part. In addition, the shape of the protective case is not limited to the above-described embodiment, and may be any shape as long as it is asymmetric vertically and horizontally. Further, the shape of the filter case is not limited to the shape of the above embodiment, but may be a shape in which the lower filter case is slid into the upper filter case as shown in FIG. 3, for example.

Further, not only the fluorescent glass dosimeter but also a film badge dosimeter, by making the shape of the film asymmetrical in the vertical and horizontal directions, it is possible to ensure the film storage direction. That is, for example, by chamfering one corner of a rectangular film and matching the shape of the storage portion of the filter case for storing the film with the shape of the film, the film storage direction can be regulated.

Further, also in the thermoluminescence dosimeter, a similar effect can be obtained by storing the TLD element in a protective case made of a resin material or the like and storing it in a filter case. Even in that case,
By making the shape of the TLD element asymmetrical in the up, down, left, and right directions and making the shape of the storage portion of the protective case match the shape of the TLD element, the storage direction of the TLD element can be regulated.

[0042]

As described above, according to the present invention, since the glass element is housed in the glass element protecting means made of a member having high resistance to impact, the glass element can be protected even if it receives a shock such as dropping. Damage can be prevented. Therefore, when transporting the glass element, the glass element can be transported without being stored in the filter case, but in a state of being stored in the glass element protection means. Therefore, it is not necessary to increase the external dimensions at the time of transportation, so that it is possible to reduce the labor and packaging cost of packaging. In addition, since the glass element and the glass element protecting means are provided with the storage direction regulating means, accurate measurement can be performed without erroneous storing direction of the glass element.

Further, in the dosimeter which can be transported alone, the storage direction regulating means is provided on the glass element and the filter case, so that accurate measurement can be performed without erroneous storing direction of the glass element.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an assembling sequence of a fluorescent glass dosimeter according to an embodiment of the present invention.

FIGS. 2A and 2B are views showing a configuration after assembling the fluorescent glass dosimeter according to the embodiment, wherein FIG. 2A is a front view and FIG.

FIG. 3 is a view showing a configuration of a conventional fluorescent glass dosimeter, in which (a) is an exploded perspective view of the fluorescent glass dosimeter, and (b) is a front view of a lower filter case 21b thereof.

FIG. 4 is a diagram showing a configuration of a conventional fluorescent glass dosimeter, in which (a) is an exploded perspective view and (b) is a cross-sectional view after assembly.

FIG. 5 is an exploded perspective view showing a configuration of a conventional film badge dosimeter.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Fluorescent glass dosimeter 2 ... Glass element 3 ... Identification code 4 ... Chamfer 5 ... Protective case 6 ... Glass element storage part 7 ... Inner convex part 8 ... Outer convex part 9 ... Identification label 10 ... Filter case 11 ... Rotary joint 12 ... Engaged part 13 ... Engagement part 14 ... Protective case storage part 15 ... Inner recess 16 ... Filter 17 ... Clip

Claims (5)

[Claims] 1. A fluorescent glass dosimeter comprising: a glass element which is excited by ultraviolet light to generate fluorescence by being excited by light; and a filter case for accommodating the glass element. A fluorescent glass dosimeter, comprising: a glass element accommodating portion; and a glass element protecting means accommodated in the filter case. 2. The fluorescent glass dosimeter according to claim 1, wherein said glass element and said glass element protecting means are provided with means for regulating the direction in which said glass element is stored. 3. The storage direction regulating means sets the shape of the glass element vertically and horizontally asymmetrically, and matches the shape of the glass element storage portion of the glass element protection means with the shape of the glass element. The fluorescent glass dosimeter according to claim 2, wherein the fluorescent glass dosimeter is configured. 4. The fluorescent glass dosimeter according to claim 1, wherein said glass element protecting means and said filter case are provided with means for restricting the mounting direction of said glass element protecting means. . 5. The mounting device according to claim 1, wherein the mounting direction regulating means is configured to make the shape of the glass element protecting means asymmetrical in the vertical and horizontal directions, and to change the shape of the glass element protecting means accommodating portion provided in the filter case to the glass element protecting means. The fluorescent glass dosimeter according to claim 4, wherein the fluorescent glass dosimeter is configured to match the shape of the fluorescent glass dosimeter.