JPS58205900A - Method of feeding particulate ion exchange resin - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a method for supplying granular ion exchange resin used for radioactive waste liquid treatment in a nuclear power plant or the like into a nuclear facility building.

[Technical Background of the Invention 1 In nuclear facilities such as nuclear power plants, radioactive waste fluid discharged in large quantities is desalinated using ion exchange resin, but in the process, particulate ions are especially removed to remove dissolved ions. Replacement resin is used.

Conventionally, when supplying this granular ion-exchange resin, it was carried into the building of a nuclear facility in the form of a bag, and after opening the bag, it was supplied into a storage tank in the manner shown in FIG.

That is, the granular ion exchange resin is put into a hopper 1 which has an eductor 3 at its outlet, is sucked from the hopper 1 by flowing driving water through the eductor 3, and is supplied to a storage tank 2 in the form of a slurry. was.

[Problems with the background art] However, with such conventional supply methods, a large amount of driving water is required, there is a risk of clogging of part of the eductor with particulate ion exchange resin due to the structure of the eductor, and there is a risk of clogging on the inner surface of the hopper. There was a problem in that a considerable amount of resin adhered to the bag, and in order to open the bag containing the resin inside the building, that is, in the radioactivity control area, the empty bag had to be disposed of as radioactive waste.

[Objective of the invention 1] The present invention is an attempt to solve these conventional problems, and it does not require a large amount of water, there is no risk of clogging with resin during the transportation process, and it is possible to eliminate secondary radioactive waste such as empty bags. The purpose of this invention is to provide a method for supplying granular Imen exchange resin that does not generate any substances.

[Summary of the Invention] The method for supplying granular ion exchange resin of the present invention includes installing a resin charging hopper outside a nuclear facility building, arranging a storage tank at a position lower than the resin charging small collar inside the building, and The bottom of the former and the resin input port of the latter are connected with an inclined pipe, and granular ion exchange resin is introduced into the resin input hopper, water is allowed to flow into the hopper, and the resin is transferred into the storage tank through the inclined pipe. It is characterized by the fact that it consists of transportation.

Embodiment 1 of the Invention The present invention will be described below based on an illustrated embodiment. FIG. 2 is a schematic diagram showing an embodiment of the method of the present invention. In this figure, parts common to those in FIG. 1 are designated by the same reference numerals.

In Fig. 2, the resin charging hopper 1 installed outside the building of the nuclear facility has one water flow 4 installed in the - part, and the bottom of the hopper 1 is installed inside the building with an inclined pipe 5. It is connected to a resin storage tank 2.

The granular ion exchange resin supplied to the resin storage tank 2 is unsealed outside the building and placed into the hopper 1.

Next, enough water is supplied from the water stream 4 to carry the granular ion exchange resin that has been introduced, and the granular ion exchange resin becomes a slurry and flows down the inclined pipe 5 into the storage tank 2 in the building. supplied to

In the above embodiments, the water inlet is provided at one location, but may be provided at a plurality of locations.

[Effects of the Invention] As is clear from the above explanation, according to the method of the present invention, the resin charging potper and the storage tank are connected by an inclined pipe, so that it is easier to supply granular ion exchange resin than in the conventional method. Only a small amount of water is required, and it is possible to avoid resin adhesion to the inner surface of the hopper and clogging of the pipes with resin, and the addition of granular ion exchange resin to the small pipe can be done outside the building. This has the excellent effect of not generating secondary radioactive waste.

[Brief explanation of the drawing]

Figure 1 is a schematic diagram of a conventional method for supplying granular ion exchange resin, Figure 2 is an enlarged sectional view of a portion of one duct in Figure 1, and Figure 3
The figure is a schematic diagram showing an embodiment of the method of the present invention. 1... Resin injection small collar 2...
......Storage tank 3...
・・・Eductor 4・・・・・・・・・・・・Water inlet 5・・・・・・・・・・・・Patent attorney for inclined piping Suyama Sa − =4− Fig. 1 Fig. 7 Figure 3

Claims (1)

[Claims] A resin charging hopper is installed outside the JtM construction building, a storage tank is placed in the building at a lower position than the resin charging hopper, and the bottom of the former and the resin charging port of the latter are connected with an inclined pipe. A method for supplying granular ion exchange resin, which comprises charging granular ion exchange resin into the resin input hopper, allowing water to flow into the hopper, and transporting the resin into a storage tank through the inclined piping.