A method for solidifying alkali slag cement of nuclear power plant boron-containing waste resin

Abstract

The invention relates to an alkaline slag cement solidification method for boron-containing waste resin of nuclear power plant. The alkaline slag cement solidification method comprises: uniformly mixing alkaline slag, zeolite powder and silica fume to prepare a mixed material; then stirring the mixed material with water in a stirrer; then pouring the boron-containing waste resin and stirring the mixture for 30-120 seconds, then adding water glass to be stirred, and finally adding a polycarboxylate superplasticizer to prepare mixed slurry; and then pouring the mixed slurry into a solidification container. The alkaline slag cement solidification method provided by the invention has the beneficial effects that (1) the resin loading capacity is obviously increased, and when the resin loading capacity is 65%, performance requirements specified by the national standard GB14569.1-2011 can be still satisfied; (2) the setting time of the mixed slurry is adjustable, so that delayed coagulation of the mixed slurry caused by borate can be effectively avoided; and (3) the hydrating heat release of the solidification body is small, no cracks are generated on the surface of the curing body, the leaching resistance of nuclide ions is good, and the mixed slurry is good in flowing property, so that the requirement of large-size solidification can be satisfied.

Description

technical field [0001] The invention belongs to the technical field of radioactive waste cement solidification, and in particular relates to a method for solidifying alkali slag cement of nuclear power plant boron-containing waste resin. Background technique [0002] With the rapid development of nuclear power technology, the problem of energy shortage in some parts of our country has also been effectively improved, but it is the development of these nuclear power plants that has caused a large amount of nuclear waste in our country. At present, cement curing is considered as an economical and effective curing method by countries all over the world. However, when traditional cement is used for curing, the water-cement ratio is often too large, and the cured body is not dense enough; the resin inclusion capacity is small, about 30%-40%, resulting in a relatively obvious expansion of the cured body; the heat of hydration is not conducive to large-volume pouring The cured body...

AI Technical Summary

Problems solved by technology

However, when traditional cement is used for curing, the water-cement ratio is often too large, and the cured body is not dense enough; the resin inclusion capacity is small, about 30%-40%, resulting in a relatively obvious expansion of the cured body; the heat of hydration is not conducive to large-volume pouring The cured body and the borate ions adsorbed in the resin have a retarding effect on the cement, causing problems such as delamination between the resin and the cement slurry