JPH08320397A - Method for processing radioactive drain enriched liquid - Google Patents

Abstract

PURPOSE: To easily handle radioactive drain enriched liquid as solid waste by transporting the radioactive drain enriched liquid enriched by an enrichment plant to an incinerator and incinerating it after it is impregnated in water absorption resin and gelatinized. CONSTITUTION: Radioactive washing drain enriched liquid of a nuclear power station or the like produced from a waste evaporator 1 as an enrichment plant is impregnated in water absorption resin 2 and gelatinized. A drum can 3 is filled with such gelatinized enriched liquid, transported to an incinerator 5, and incineration and volume reduction are performed. The radioactive washing drain enriched liquid of about 20g is absorbed in the water absorption resin 2 of 1g and gelatinized. When it is incinerated, the volume reduction of 95% can be achieved. Thereby the drum can 3 is filled with the solid waste, which can be easily handled. In addition, when the enriched liquid-impregnate water absorption resin 2 is incinerated in the incinerator 5, less liquid scattering occurs for gelatinization of the enriched liquid and damage caused by heat impact of a furnace wall or the like of the incinerator 5 can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for treating a concentrated liquid of radioactive wastewater such as radioactive cleaning wastewater generated in a nuclear power plant.

[0002]

2. Description of the Related Art Condensate is generated when radioactive cleaning wastewater in a nuclear power plant or the like is vaporized. Conventionally, the concentrate is pipe-transferred from an evaporation facility to an incinerator, or a liquid is transferred using a dedicated transfer container. It is transferred in the state, put into the incineration facility and incinerated.

A conventional method for treating the radioactive cleaning wastewater concentrate will be described with reference to the flow sheet diagrams shown in FIGS. 2 and 3.

In FIG. 2, the concentrated liquid 13 generated in the waste liquid evaporator 11 is transferred by a pipe 12 and directly incinerated in an incinerator 15. In FIG. 3, the concentrated liquid 13 generated from the waste liquid evaporator 11 is transferred by the transfer container 16 and directly incinerated in the incineration facility 15.
In addition, 14 in FIGS. 2 and 3 is a flame generated in the incineration facility 15.

[0005]

In the conventional transfer of radioactive wastewater concentrate to the incinerator, the concentrate is transferred using a pipe or a transfer container, but the concentrate is a liquid waste. Since it was handled, it was necessary to take measures against leakage. Further, in the incineration of the concentrated liquid, since the concentrated liquid is directly put into the incinerator, the concentrated liquid may scatter in a wide range and damage the furnace due to thermal shock.

The present invention is intended to provide a method for treating a radioactive wastewater concentrate capable of solving the above problems.

[0007]

A method for treating a radioactive wastewater concentrate according to the present invention comprises a radioactive wastewater concentrate concentrated by a concentrating device, impregnated with a water-absorbing resin, gelated, and then transferred to an incinerator for incineration. It is characterized by doing.

[0008]

By impregnating the water-absorbent resin with the radioactive wastewater concentrate concentrated in the concentrator, the concentrate becomes a gel and can be treated as solid waste. Therefore, it is easier to handle than a liquid.

Also, when the water-absorbent resin impregnated with the concentrated liquid is incinerated, since the radioactive wastewater concentrated liquid is gelated, the liquid scattering is small and damage to the furnace wall or the like due to thermal shock can be prevented.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIG.
First, the water absorbent resin 2 is impregnated with the concentrated liquid of radioactive cleaning wastewater, such as in a nuclear power plant, generated from the waste liquid evaporation device 1 as a concentrating device to cause gelation. The concentrated liquid thus gelled is packed in a drum 3 and transferred to an incinerator 5 for volume reduction by incineration. In addition, 4 is a flame generated in the incineration facility.

As the water absorbent resin 2, for example, Sunfresh ST-100 manufactured by Sanyo Kasei Co., Ltd. can be used. In the case of this Sunfresh ST-100, about 20 g of water absorbent resin per 1 g of water absorbent resin is used. The radioactive cleaning wastewater concentrate is absorbed and gelled. When this is incinerated, 425
A 95% weight loss can be achieved at 0 ° C, and the water-absorbent resin itself can be sufficiently incinerated.

In this embodiment, as described above, the water-absorbent resin 2 is impregnated with the radioactive cleaning wastewater concentrated liquid and gelled, so that the solid waste can be packed in the drum 3 and easily handled.

Also, when the water-absorbent resin 2 impregnated with the concentrated liquid is incinerated in the incinerator 5, the concentrated liquid is gelated, so that the liquid is less scattered and the thermal shock of the furnace wall of the incinerator 5 is caused. It is possible to prevent damage due to.

[0014]

The present invention can bring the following effects.

(1) In the transfer, gelation can be achieved by impregnating the water-absorbent resin with the radioactive wastewater concentrate, which makes the handling easier than in the case of liquid.

(2) Further, since the water-absorbent resin impregnated with the radioactive wastewater concentrate is incinerated as a gel-like waste, the amount of liquid scattering is less than that when the liquid waste liquid is put into an incinerator. The furnace wall etc. will not be damaged by thermal shock.

[Brief description of drawings]

FIG. 1 is a flow sheet diagram of a method for treating a radioactive cleaning wastewater concentrate according to an embodiment of the present invention.

FIG. 2 is a flow sheet diagram of one example of a conventional method for treating a radioactive cleaning wastewater concentrate.

FIG. 3 is a flow sheet diagram of another example of a conventional method for treating a radioactive cleaning wastewater concentrate.

[Explanation of symbols]

 1 Waste liquid evaporation equipment 2 Water absorbent resin 3 Drum can 4 Flame 5 Incinerator equipment

Claims (1)

[Claims] 1. A method for treating a radioactive wastewater concentrate, which comprises impregnating a water-absorbent resin with a concentrated wastewater concentrate concentrated by a concentrator, gelling the same, and then transferring the gelled wastewater to an incinerator for incineration.