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Wastes Management with the Use of Polymer Materials

#2737


Management and Safe Disposal of Liquid Radioactive Wastes with the Use of High Technology Polymer Materials

Tech Area / Field

  • ENV-RWT/Radioactive Waste Treatment/Environment

Status
3 Approved without Funding

Registration date
17.03.2003

Leading Institute
Khlopin Radium Institute, Russia, St Petersburg

Collaborators

  • Pacific World Trade Inc., USA, IN, Indianapolis\nNochar, USA, IN, Indianapolis

Project summary

Nowadays at radiochemical plants great amounts of radioactive and toxic solutions of organic substances, introducing serious hazard to an environment, are accumulated. These involve used extractants, lube oils and various aqueous solutions contaminated by hydrocarbon solvents and extractants and products of radiolysis.

One of the ways to improve radioactive management safety is the development of the technology, which would allow the processing of listed liquid radioactive waste to solid products, thus reducing hazardous conditions for staff and the environment.

It must be also noticed, that in case of an emergency the solidification of solutions directly in closed vessels would prevent these products from being spread into the environment.

Different techniques and materials can be used for this problem resolution, including those involving the use of polymer materials, which are capable to solidify liquid wastes with the formation of chemically stable solid products.

The principal advantages of liquid wastes processing through their immobilization within a polymer matrix are as follows:

1. Possibilities to perform the process of waste immobilization directly in containers, resulting products remaining in containers for further storage.

2. Possibilities for urgent localization of radioactive wastes in case of emergency at various establishments of nuclear and chemical branches.

3. Proposed technique doesn’t require any specially designed equipment or supplementary energy supply.

4. The reduction of the number of technological operations as compared with conventional methods and the availability of a large range of solution composition varying parameters.

The object of proposed project is the development of universal technology for immobilization of organic, aqueous and mixed wastes, which would allow to improve environmental situation at radiochemical plants.

The goal sought for, will be accomplished through the utilization of efficient processes of liquid product immobilization within polymer materials. The following works will be performed within the frame of present Project in order to achieve the specified objective:

  • The analysis of literature data and the nomenclature of organic and aqueous wastes to be eliminated, and the choice of the technology for their preparation for subsequent immobilization.
  • Bench testing on model solutions and the selection of optimal operating conditions, ensuring complete immobilization of wastes of various types, including those chlorine- and fluorine-containing.
  • It is anticipated that the experiments on real organic radioactive wastes of Radium Institute and other enterprises of branch will be performed upon completion of the investigations on model solutions.

In case of successful realization of R&D work package, which are being planned, the optimal parameters of the process ensuring an efficacious confinement of liquid radioactive wastes will be selected, and all necessary recommendations for industrial use of developed technology will be generated.

The work to be performed will result in the first time development of a new technology for the immobilization of liquid radioactive wastes of various composition which will allow to rise the level of environmental safety at enterprises related to chemical or radiochemical (HLW processing) industry.

The technology to be developed will be of interest not only for American & Russian enterprises related to processing of HL wastes but also for other foreign partners working in this field.

This works results could also be applied in the management of high-toxic wastes issued from chemical plants.


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