JP4858845B2 - Sampling container and method of using the same - Google Patents

Description

  The present invention relates to a sampling container and a method for using the same.

  Waste liquid generated by reprocessing spent fuel is vitrified in a waste liquid treatment facility.

  FIG. 6 is an example of a vitrified container used for vitrification treatment. This solidified container has a long cylindrical container body 1 with a closed bottom, and a short cylindrical shape connected to the upper part of the container body 1. A container head 4 comprising a flange 3 provided at the outer peripheral edge of the inflow pipe 2 and its upper end, and a lid 5 disposed so as to abut on the upper end surface of the inflow pipe 2 and to be inscribed in the flange 3. ing.

  Stainless steel having high rigidity and excellent corrosion resistance is used as a material for forming the container body 1, the inflow pipe 2, the container head 4 and the lid 5.

  When the radioactive waste liquid is vitrified, the radioactive waste liquid is mixed into the molten glass that has been heated and maintained so as to be liquid in the melting furnace. Flow down into part 1.

  Further, after the molten glass in the container body portion 1 is solidified by natural air cooling, the lid body is such that the lower surface peripheral portion of the lid body 5 is in contact with the upper end surface of the inflow pipe 2 and the outer peripheral surface of the lid body 5 is inscribed in the flange 3. 5 is disposed and fixed to the container head 4.

  The vitrified body thus produced is stored in a waste storage facility until the decay heat is removed.

  The composition of the glass filled in the solidified container can be calculated by grasping the analysis result of the waste liquid supplied to the melting furnace and the amount of the glass raw material, but in the future, the composition analysis and leaching test of the actually produced glass will be conducted. In order to do this, it is necessary to secure a sample during the vitrification process.

As an apparatus for obtaining a sample at the time of vitrification treatment, a cylindrical outer member and a cylindrical inner member are provided at the molten glass inlet of the solidified container so that the molten glass is received by the cylindrical inner member. (See, for example, Patent Document 1).
Japanese Patent Laid-Open No. 5-264417

  When performing composition analysis or leaching test, a small amount (about 2 g) of glass is used in powder form. However, in Patent Document 1, only a small amount of glass that has accumulated and solidified on the cylindrical inner member is taken out. Have difficulty.

  An object of the present invention is to provide a sampling container in which only a small amount of a sample in which a liquid material is solidified and a method for using the same.

  In order to achieve the above object, the invention according to claim 1 is capable of being incorporated into the first cup and the first cup, and the outer peripheral surface of the first cup with respect to the inner peripheral surface of the first cup is assembling. And a second cup that is provided with a gap therebetween, and a liquid introduction path is formed in the second cup for dripping the liquid material poured into the second cup onto the outer peripheral surface.

  According to the second aspect of the present invention, the liquid introduction path formed in the second cup is formed as a slit cut downward from the upper edge of the second cup.

  In the invention according to claim 3, the second cup is incorporated in the first cup, the molten glass is poured into the second cup, and a small amount of the molten glass is transferred from the liquid introduction path to the second cup outer peripheral surface. After the dripped molten glass is naturally solidified to form glass flakes, the second cup in the first cup is taken out, and the glass flakes are peeled off from the outer peripheral surface of the second cup for analysis. Use for samples.

  According to the sampling container and the method of using the same of the present invention, the following excellent effects can be obtained.

  (1) The liquid poured into the second cup drops as the liquid level rises and drops onto the outer peripheral surface of the second cup through the liquid introduction path, so that this can be obtained as a small amount of sample. Even if the liquid material overflows from the second cup due to an erroneous operation, the first cup can prevent the liquid material from flowing out.

  (2) When the liquid introduction path is a slit, the liquid material can be reliably dripped onto the outer peripheral surface of the second cup.

  (3) After the molten glass in which the molten glass is dripped from the liquid introduction path to the outer peripheral surface of the second cup is solidified to form a glass flake, any second cup in the first cup is taken out, Sometimes, the glass flakes can be peeled off from the outer peripheral surface of the second cup and used as an analysis sample.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIGS. 1 to 5 show an example of a sampling container according to the present invention, and a first cup 7 supported by a handling tool 6 and a second cup 8 that can be incorporated in the first cup 7. It has.

  The tool 6 has a support portion 9 that extends substantially horizontally and is remotely operated by a manipulator (not shown), and an engagement portion 10 that protrudes substantially vertically upward from the tip of the support portion 9.

  The first cup 7 has a bottom plate 11 that is circular in plan view and has a bottom surface that rests on the support portion 9 of the tool 6, and a cylindrical side plate 12 that extends upward along the entire outer periphery of the bottom plate 11. ing.

  The upper edge of the side plate 12 is inclined with respect to the bottom plate 11 as a whole in consideration of visual inspection and visibility inside the cup using an imaging means.

  An opening 13 into which the engaging portion 10 of the tool 6 is inserted is drilled in the vicinity of the outer edge of the bottom plate 11 below the highest portion of the side plate 12.

  Between the periphery of the opening 13 on the upper surface of the bottom plate 11 and the highest part of the side plate 12, a cover 14 that covers the entire engaging portion 10 of the tool 6 inserted into the opening 13 is provided.

  That is, the engaging portion 10 of the opening 13 of the bottom plate 11 is inserted, and the bottom plate 11 is placed on the supporting portion 9 so that the supporting portion 9 is positioned in the passing direction of the first cup 7, and the first cup is used by the manipulator. 7 is operated remotely.

  The second cup 8 has a substantially square shape (square with chamfered corners) in plan view, and the bottom surface is connected to the bottom plate 15 placed on the bottom plate 11 of the first cup 7 and each side of the bottom plate 15. When the second cup 8 is incorporated into the first cup 7, the outer peripheral surface of the side plate 16 of the second cup 8 becomes the first side of the first cup 7. A gap is separated from the inner peripheral surface of the side plate 12 of the cup 7.

  Each side plate 16 of the second cup 8 has a slit 17 extending downward from its upper edge.

  The slit 17 serves as a liquid guide path for dripping the molten glass G poured into the second cup 8 onto the outer peripheral surface of the side plate 16.

  Therefore, the lower end of the slit 17 exhibits a steep downward slope from the inner peripheral surface of the side plate 16 toward the outer peripheral surface.

  Next, a method for using the sampling container will be described.

  First, the second cup 8 is assembled in the first cup 7, and the molten glass G is carefully poured into the second cup 8, and a small amount of the molten glass G is dropped from the slit 17 onto the outer peripheral surface of the side plate 16. .

  At this time, even if the molten glass G overflows from the second cup 8 due to an erroneous operation, the first glass 7 can prevent the molten glass G from flowing out.

  If the molten glass G dripped on the side plate 16 is naturally solidified to form the glass flakes S, the second cup 8 in the first cup 7 is taken out and stored in the radiation control area.

  That is, the glass flake S is a sample that is selectively separated by a small amount.

  Thereafter, if the glass flakes S are peeled off from the outer peripheral surface of the side plate 16 of the second cup 8 with a simple tool such as a scraper, the glass flakes S can be used as an analysis sample.

  Furthermore, a new unused second cup 8 is incorporated in the first cup 7 and the first cup 7 is reused to collect the next sample.

  In addition, the sampling container of this invention and its usage method are not limited only to embodiment mentioned above, Of course, it can add in the range which does not deviate from the summary of this invention.

  The sampling container and its method of use of the present invention can also be applied to sample collection from various liquid materials other than molten glass.

It is a longitudinal cross-sectional view which shows an example of the sampling container of this invention. It is an II-II arrow line view of FIG. It is a perspective view of the 1st cup relevant to FIG. FIG. 3 is a perspective view of a second cup related to FIG. 1. It is a perspective view which shows the state after pouring a molten glass to the 2nd cup of FIG. It is a longitudinal cross-sectional view which shows an example of a vitrified body container.

Explanation of symbols

7 First cup 8 Second cup 17 Slit (liquid introduction path)
G Molten glass (liquid)
S glass flake

Claims (3)

  A first cup and a second cup that can be incorporated into the first cup, and whose outer peripheral surface is spaced from the inner peripheral surface of the first cup when assembled; A sampling container characterized in that a liquid guide passage is formed in the cup for dripping liquid poured into the cup onto the outer peripheral surface.   The sampling container according to claim 1, wherein the liquid introduction path formed in the second cup is a slit cut downward from the upper edge of the second cup. The second cup is incorporated in the first cup, and the molten glass is poured into the second cup so that a small amount of molten glass is dripped from the liquid introduction path onto the outer peripheral surface of the second cup. The glass flakes are naturally solidified to form a glass flake, and then the second cup in the first cup is taken out, and the glass flake is peeled off from the outer peripheral surface of the second cup and used as an analysis sample. The usage method of the sampling container in any one of Claim 1 and Claim 2.

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