JPH10332833A - Smeared filter paper container and method of making radiation measuring sample using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable accurately measuring of radio activity while improving workability by providing a synthetic resin film with a plurality of bag-shaped parts opened on one hand, separation areas and the like to enable generation of a measuring sample by simple working. SOLUTION: A thin synthetic resin film 2 is thermally fused on one side of a thick synthetic resin film 1 and a number of bag-shaped parts 4 are formed with upper parts thereof made as openings 3. A separation area 5 is provided between bag-shaped parts 4 to divide the right and left bag-shaped parts while another separation area 6 is provided to divide the upper and lower bag-shaped parts 4. A bonding area 7 is provided near each opening of the bag-shaped parts 4 to allow thermal fusion. The use of a filter paper housing bag thus obtained eliminates the need for not only extra filter paper housing bags but also taking smeared filter papers after sampled out of the bag-shaped parts 4 thereby enabling measuring of radio activity with a container as intact. There is no need for an adhesive tape, synthetic resin sealing film, scissors and the like thereby achieving an omission of processes, a shortening of time and a reduction in cost.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of means for investigating the presence and degree of contamination of radioactive materials, such as nuclear power plants, medical institutions, research institutions, etc.

[0002]

2. Description of the Related Art With the expansion of radioactive and nuclear applications, the number of people who handle radiation and the chance of being exposed to radiation are increasing, and the importance of radiation protection and radiation safety is increasing more and more. In addition, the whole society is interested in radiation and nuclear power, and higher technology is required for safety related to radiation and nuclear power.

[0003] The goal of radiation protection is to protect the environment associated with the proper use of radiation and nuclear energy and to ensure the safety of the human body. Currently, radiation and nuclear power facilities use radiation protection based on various management regulations. Manages protection. Among them, there are the direct measurement method and the indirect measurement method for the control and measurement method of the surface contamination in the Radiation Hazard Prevention Law regarding the sticking contamination and the free contamination, and the indirect measurement method for the free contamination is as follows. A surface contamination measurement method called a smear method is known. This method uses a sample paper called smear filter paper to wipe off the substances attached to the surface of the measurement site, store it in a plastic collection bag, transport it to the measurement location, remove it from the collection bag, and remove After affixing to a tape and laminating the surface with a synthetic resin film, the surface is cut with scissors to a measurable size, and placed on a sample dish for radioactivity measurement. This method will be described below by dividing it into work steps. 1. Preparation for work The number of smear filter papers to be collected is stored in the smear filter paper collection bag.

2. Sampling The smear filter paper is taken out of the smear filter paper collection bag, sampled, and then stored again in the smear filter paper collection bag.

3. Preparation of sample preparation and measurement The smear filter paper is taken out of the collection bag, the sample is prepared, the smear filter paper is stuck to an adhesive tape dedicated to measurement preparation, and the whole smear filter paper is laminated with a life fan.

4. Cut The laminated smear filter paper is cut with scissors to obtain a sample of a measurable size.

5. Sample measurement The samples cut one by one are placed on the sample dish of the measuring instrument, and the radioactivity is measured.

[0008]

According to the prior art, as described above, the smear filter paper is stored in a collection bag and transported, and further removed from the collection bag, laminated with an adhesive tape and a synthetic resin film, and cut with scissors. Therefore, the work efficiency is poor, and especially in the preparation of data adjustment and measurement, much time is spent on the work of sealing smear filter paper using an adhesive tape and a rifan. In addition, since the adhesive tape is used, when cutting the sample in preparation for measurement, there is also a problem that glue adheres to the scissors and the cutting efficiency is poor, resulting in poor work efficiency. Moreover, two types of contaminants, a collection bag and a laminate sample, are generated, and contaminants are taken in and out of the collection bag. Therefore, there is a problem that the contaminants remain in the collection bag and accurate measurement cannot be performed.

The present invention provides a means for preparing a measurement sample by a simple operation without generating unnecessary contaminated waste for transportation, improving workability, and enabling accurate radioactivity measurement. The task is to

[0010]

Means for solving the above problems include, as described in the claims, a synthetic resin film and a plurality of bag-shaped portions provided on the synthetic resin film, at least one of which is open. And a smear filter paper storage container having a cutting area for separating the bag-shaped part from other bag-shaped parts, and an adhesive-capable area provided in the vicinity of the opening of the bag-shaped part. Provided, a rectangular bag-shaped portion provided continuously, and a synthetic resin film, a plurality of bag-shaped portions provided on the synthetic resin film, at least one of which is open, and the bag-shaped portion A cutting area separating the other bag-shaped part from the other bag-shaped part, and a bag-shaped part of a smeared filter paper storage container having an adherable area provided near the opening of the bag-shaped part, containing the smeared filter paper to which the measurement sample is attached, When bonding the bondable area INCLUDED, how to create radiation measurement sample using the smear filter paper container, characterized in that the separation by cutting the cutting region into individual samples, and the like.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION

[0012]

Embodiment 1 FIGS. 1 to 4 show a smear filter paper storage container which can be directly measured according to an embodiment of the present invention, FIG. 1 is a partial plan view thereof, and FIG. 2 is an overall view of a state in which smear filter paper is stored. , FIG. 3 is a plan view of a cut state, and FIG. 4 is a plan view of a radiation measurement sample. The storage container heat-fuses a thick synthetic resin film 1 and a thin synthetic resin film 2 on one surface of the synthetic resin film 1,
A large number of bag-shaped parts 4 are formed with the upper part as an opening 3. In this embodiment, a cutting region 5 for separating left and right bag-like portions and a cutting region 6 for separating upper and lower bag-like portions are provided between the bag-like portions. In addition, a bondable area 7 is provided near the opening of the bag-shaped portion to enable heat fusion.

In this example, a polyolefin-based film (OPP) having a thickness of 20 μm is used for the upper portion 2 and a 60 μm-thick OPP film having the thickness of 60 μm is used for the lower portion 1. Regarding the counting efficiency for β-rays, various sources “60
Co.137Cs.Uranium oxide ". The size of the entire container was set to A4 size (binder size) in consideration of portability, so that 42 sheets of smear filter paper could be stored per sheet. In this example, a yellow pattern is printed on the back surface (not shown) as a countermeasure for identifying the entry of foreign matter.

Also, a perforation 8 is inserted into the cutting area 6 so that only a necessary amount can be cut and used, and a perforation 9 is also inserted into the cutting area 5 so that one sample can be cut by hand after heat seal cutting. It is.

The step of measuring radioactivity using this storage bag is as follows.

In preparation for sampling, a necessary number of unused smear filter papers 50 are stored in the storage bag 1. Go to the sampling site, take out the smear filter paper, hold down the filter paper with your finger, and wipe off the area of 100 Cm ² to collect the contaminants. The smeared filter paper to which the contaminants are attached is stored in the original place of the storage bag as shown in FIG. Similarly, contaminants are collected from another location and stored sequentially in storage bags.

After the necessary number of storages have been completed, the storage is completed by attaching it to a cutting heat sealing machine, and forming
At the same time, the upper part is cut at the same time.
This state is shown in FIG. At this time, the hand-held portion of the smear filter paper 50 is cut at the same time as the storage bag, but the remaining smear filter paper sample is prevented from falling off because the opening 3 is closed by the heat fusion 51. The sample in a row is cut by hand from the perforation 9 in the cutting area 5 to obtain one sample shown in FIG. 4, and the cut sample is placed in a measuring instrument dish to prepare for measurement. do. Set the sample plate containing the sample in the measuring instrument and perform automatic continuous measurement. Check the measurement results separately with a printer.

As described above, when the filter paper storage bag of the above embodiment is used, there is no need to use an extra filter paper storage bag, it is not necessary to remove it from the smeared filter paper bag after collection, and the radioactivity remains as it is in the filter paper storage bag. Measurement becomes possible. In addition, there is no need for an adhesive tape, a rifan, scissors and the like used in the conventional sample preparation and measurement, so that the steps can be omitted and the time can be shortened. In addition, since it is possible to reduce various materials related to the related art, it is possible to significantly reduce costs.
Further, since the conventionally used storage bag becomes unnecessary, contaminants are reduced, the dispersion of contamination is avoided, and the collected sample can be measured as it is, so that the measurement accuracy can be improved.

[0019]

Embodiment 2 FIGS. 5 and 6 are plan views showing another embodiment of the present invention. The storage container is made of a thick synthetic resin film 11 and a thin synthetic resin film 12 heat-sealed on one surface of the synthetic resin film 11 as described above. Is formed. In this embodiment, a cutting region 15 for separating the left and right bag portions is provided between the bag portions, and a cutting region 16 for separating the upper and lower bag portions is provided. An area 17 is provided near the opening 13 of the bag-like portion to enable adhesion. An adhesive is applied to this area, and a release paper is provided thereon when not in use.

The film configuration of this example uses the same polyolefin-based film (OPP) as described above. A perforation 19 is provided in the cutting area 15 so that one sample can be cut by hand after cutting. In this example, no perforations are provided in the cutting area 15.

Step of measuring radioactivity using this storage bag
Is necessary in preparation for sampling as described above.
Put a certain number of unused smear filter papers in the storage bag,
Go to the collection site, remove the smear filter paper, press the filter paper with your finger
100Cm^TwoWipe off the area of contaminants
Quality, and remove the smeared filter paper with contaminants
Put it face down in the original place of the storage bag. At this time,
The release paper provided in the attachable area 17 is peeled off to form a bag-like portion.
14 by pressing near the opening, the film 11
And 12 are adhered. Contaminants from another location as well Quality
Collect and store them in storage bags. The required number of storage
After completion, it is mounted on the cutting machine and connected in one row.
A slightly upper portion of the wearable area 17 is cut. At this time,
A The hand-held part of the filter paper is cut at the same time as the storage bag.
The opening 13 of the smeared filter paper sample was closed with an adhesive.
Smear filter paper does not fall off because it has been removed. With a row of samples
If it is not, cut it by hand from the 19th perforation in the cutting area 15.
Can be cut into one sample and cut into a measuring instrument dish
The sample thus obtained is placed and measured in the same manner as described above.

As described above, when the filter paper storage bag of the present embodiment is used, there is no need to use an extra filter paper storage bag, it is not necessary to remove the filter paper storage bag from the smear filter paper bag after the collection, and the radioactivity remains as it is. It is the same that measurement becomes possible,
Compared with the above-described embodiment, heat sealing is not required, so that the steps can be omitted and the time can be further shortened.

[0023]

By using the smear filter paper storage bag that can be directly measured, there is no need to use an extra filter paper storage bag, it is not necessary to remove it from the smear filter paper bag after collection, and radioactivity remains as it is in the filter paper storage bag. Measurement becomes possible. In addition, there is no need for an adhesive tape, a rifan, scissors, etc., which have been used in the conventional sample preparation and measurement. In addition, since it is possible to reduce various materials that were required in the past, significant cost reductions can be achieved, and the storage bags used in the past become unnecessary, so that the dispersion of pollutants can be avoided, and the collected samples can be used as they are. Since measurement can be performed, measurement accuracy can be improved.

[Brief description of the drawings]

FIG. 1 is a plan view illustrating an embodiment of the present invention.

FIG. 2 is a plan view illustrating an embodiment of the present invention.

FIG. 3 is a plan view illustrating an embodiment of the present invention.

FIG. 4 is a plan view illustrating an embodiment of the present invention.

FIG. 5 is a plan view illustrating an embodiment of the present invention.

FIG. 6 is a plan view illustrating an embodiment of the present invention.

[Explanation of symbols]

 1, 11, thick synthetic resin film 2, 12, thin synthetic resin film 3, 13, opening 4, 14, bag-shaped part 5, 15, cutting area 16, 16, cutting area 7, 17, enabling bonding Area 8, 9, 19, perforation 50, smear filter paper

Claims (5)

[Claims] 1. A smear filter paper storage having a synthetic resin film, a plurality of bag-shaped portions provided on the synthetic resin film, at least one of which is open, and a cutting region separating the bag-shaped portion from other bag-shaped portions. container. 2. The smear filter paper container according to claim 1, further comprising an adhesive area provided near an opening of the bag-shaped portion. 3. The storage container for smeared filter paper according to claim 1, wherein a perforation is provided in at least one cutting area. 4. The container for storing smear filter paper according to claim 1, wherein the rectangular bag-shaped portion is provided continuously. 5. A synthetic resin film, a plurality of bag-shaped portions provided on the synthetic resin film, at least one of which is open; a cutting region separating the bag-shaped portion from other bag-shaped portions; The smear filter paper to which the measurement sample is adhered is stored in the bag-shaped portion of the smear filter paper storage container having the adhesive area provided near the opening, and the adhesive area is adhered, and the cut area is cut to obtain individual pieces. A method for preparing a radiation measurement sample using a smear filter paper storage container, wherein the sample is separated into samples.