JPS62187297A - Method of processing waste - 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 (a) Industrial Application The present invention relates to a waste treatment method suitable for use in treating waste, particularly radioactive waste.

(b), Prior Art Conventionally, waste, especially radioactive waste, has been processed by mixing the waste with cement, water, etc., injecting it into a storage container such as a drum pipe, solidifying it, and storing it in a designated manner. It was kept in place.

(C) 0 Problems to be Solved by the Invention However, due to its radioactivity, these radioactive wastes have to be stored for a fairly long period of time, during which time the drum pipes used to store the waste corrode. Water such as rainwater enters the pipes and flows down the surface of the solidified and stored waste, resulting in the inconvenience of radioactive materials inside the pipes leaking out.

Furthermore, since the treatment and storage locations for this type of waste are often located far apart, it is desirable to treat the waste in a manner that ensures safety during transportation.

In order to eliminate the above-mentioned drawbacks, the present invention is safe during transportation, and even if a storage container such as a drum pipe is damaged due to corrosion etc. and water enters, the radioactive materials inside will be absorbed into the water. The object of the present invention is to provide a method for treating waste that does not cause leaching.

(d) Means for solving the problem, that is, the present invention dries the water content of the waste to be treated,
In this state, dry kneading is carried out with the water absorption reaction member to mix them to an even state, and the mixed waste and water absorption reaction member are compression molded, and the molded waste and water absorption reaction member are It is constructed by putting it in a dry state into a storage container such as a drum pipe and sealing it.

(e) 0 effect With the above configuration, the present invention has the advantage that even if the storage container is damaged during transportation, the waste will not leak outside because it is shaped and solidified, and the container will not be damaged during storage. Therefore, even if water enters the container, the water is absorbed by the water absorption reaction member, and the waste materials are prevented from leaking out together with the entered water.

(f), Example Examples of the present invention will be specifically described below.

When treating waste such as radioactive waste, the waste to be treated is first dried to sufficiently evaporate water. The thus dried waste material and aggregate such as cement 1-1 sand are dry kneaded and mixed to a sufficiently uniform state. Next, the mixed mixture of waste, cement, etc. is compression molded to form a predetermined size. In this state, the compression-molded waste is placed in a dry state into a storage container such as a drum tube and sealed.

In this way, the sealed waste is transported to a designated storage location by transportation means such as trunks or ships, but since the waste in the container is shaped and solidified, it is easy to handle. Even if the container is dropped and damaged, the waste contents will not leak outside, making it safe.

Once the storage container is transported to a predetermined storage location, the waste may be stored in the storage container for an extended period of time. If the storage container is corroded and damaged during long-term storage, and water such as rainwater enters the container from the damaged area, the intruding water will be transferred to the dried, molded and solidified material inside the container. It causes a hydration reaction with cement and is absorbed, preventing the water from flowing out of the container again. Since the cement and waste are sufficiently air-conditioned and shaped and solidified in a uniform state, the hydration reaction of the cement takes place in a way that evenly incorporates the surrounding waste. In addition, as a result of this, the waste solidifies together with the cement, so that the waste does not collapse due to water and leak outside.

The amount of water that enters at once is too heavy to react with all the cement in the container, so the hydration reaction of all the cement in the container is completed and the water that enters is absorbed into the cement. (It takes a considerable amount of time for the radioactive substance to leach outside in a radioactive form. Therefore,
During this time, leakage of radioactive substances to the outside can be effectively prevented despite damage to the container.

In addition, although the above-mentioned embodiment described the case of storing radioactive waste as waste, the waste to which the present invention is applied is not limited to radioactive waste, but any waste that needs to be stored for a long period of time. Of course, it can be applied to the processing of objects.

(g) 0 Effects of the Invention As explained above, according to the present invention, the water content of the waste to be treated is dried, and in that state, the property of cement etc. to start a reaction in the form of absorbing water. Knead together with a water absorbing reaction member having
Furthermore, the mixed waste and the water absorption reaction member are compressed and molded, and the molded waste is put into a storage container such as a drum pipe in a dry state and sealed, so that it can be stored for a long period of time. Even if the container is damaged and water such as rainwater enters the container during the period, the water that has entered will be absorbed by the water absorbing reaction member, so the mixed water will leak out of the container along with the waste and be released outside. It is possible to prevent contamination.

Claims (1)

[Claims] Drying the water content of the waste to be treated, dry kneading it together with a water absorption reaction member in that state to mix both to an even state, and then subjecting the mixed waste to the water absorption reaction. A waste treatment method comprising compression molding a member, and placing the molded waste and water absorption reaction member in a dry state into a storage container such as a drum pipe and sealing the same.